chore(deps): update Go dependencies

* Optionally allow warnings in QPDF operations

* warnings are not errors by default

* Apply suggestions from code review

Co-authored-by: Julien Neuhart <neuhart.julien@gmail.com>

* fix some merge artifacts

* follow the args convention

---------

Co-authored-by: Julien Neuhart <neuhart.julien@gmail.com>

.env

@@ -1,4 +1,4 @@
-GOLANG_VERSION=1.23
+GOLANG_VERSION=1.24
 DOCKER_REGISTRY=gotenberg
 DOCKER_REPOSITORY=gotenberg
 GOTENBERG_VERSION=snapshot
@@ -7,7 +7,7 @@ GOTENBERG_USER_UID=1001
 NOTO_COLOR_EMOJI_VERSION=v2.047 # See https://github.com/googlefonts/noto-emoji/releases.
 PDFTK_VERSION=v3.3.3 # See https://gitlab.com/pdftk-java/pdftk/-/releases - Binary package.
 PDFCPU_VERSION=v0.8.1 # See https://github.com/pdfcpu/pdfcpu/releases.
-GOLANGCI_LINT_VERSION=v1.63.4 # See https://github.com/golangci/golangci-lint/releases.
+GOLANGCI_LINT_VERSION=v1.64.2 # See https://github.com/golangci/golangci-lint/releases.
 GOTENBERG_VERSION=snapshot
 DOCKERFILE=build/Dockerfile
 DOCKERFILE_CLOUDRUN=build/Dockerfile.cloudrun

.github/actions/build-push/action.yml

@@ -0,0 +1,67 @@
+name: Build and Push
+description: Build and push Docker images
+author: Julien Neuhart
+
+inputs:
+  github_token:
+    description: The GitHub token
+    required: true
+    default: ${{ github.token }}
+  docker_hub_username:
+    description: The Docker Hub username
+    required: true
+  docker_hub_password:
+    description: The Docker Hub password
+    required: true
+  platform:
+    description: linux/amd64, linux/386, linux/arm64, linux/arm/v7
+    required: true
+  version:
+    description: Gotenberg version
+    required: true
+  alternate_repository:
+    description: Alternate repository to push the tags to
+  dry_run:
+    description: Dry run this action
+
+outputs:
+  tags:
+    description: Comma separated list of tag
+    value: ${{ steps.build_push.outputs.tags }}
+  tags_cloud_run:
+    description: Comma separated list of Cloud Run tags (linux/amd64 only)
+    value: ${{ steps.build_push.outputs.tags_cloud_run }}
+
+runs:
+  using: composite
+  steps:
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Check out code
+      uses: actions/checkout@v4
+
+    - name: Log in to Docker Hub
+      uses: docker/login-action@v3
+      with:
+        username: ${{ inputs.docker_hub_username }}
+        password: ${{ inputs.docker_hub_password }}
+
+    - name: Build and push ${{ inputs.platform }}
+      id: build_push
+      shell: bash
+      run: |
+        .github/actions/build-push/build-push.sh \
+          --version "${{ inputs.version }}" \
+          --platform "${{ inputs.platform }}" \
+          --alternate-repository "${{ inputs.alternate_repository }}" \
+          --dry-run "${{ inputs.dry_run }}"
+
+    - name: Outputs
+      shell: bash
+      run: |
+        echo "tags=${{ steps.build_push.outputs.tags }}"
+        echo "tags_cloud_run=${{ steps.build_push.outputs.tags_cloud_run }}"

.github/actions/build-push/build-push.sh

@@ -0,0 +1,173 @@
+#!/bin/bash
+
+# Exit early.
+# See: https://www.gnu.org/savannah-checkouts/gnu/bash/manual/bash.html#The-Set-Builtin.
+set -e
+
+# Source dot env file.
+source .env
+
+# Arguments.
+version=""
+platform=""
+alternate_repository=""
+dry_run=""
+
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    --version)
+      version="${2//v}"
+      shift 2
+      ;;
+    --platform)
+      platform="$2"
+      shift 2
+      ;;
+    --alternate-repository)
+      alternate_repository="$2"
+      shift 2
+      ;;
+    --dry-run)
+      dry_run="$2"
+      shift 2
+      ;;
+    *)
+      echo "Unknown option $1"
+      exit 1
+      ;;
+  esac
+done
+
+echo "Build and push 👷"
+echo
+
+echo "Gotenberg version: $version"
+echo "Target platform: $platform"
+
+if [ -n "$alternate_repository" ]; then
+  DOCKER_REPOSITORY=$alternate_repository
+  echo "⚠️ Using $alternate_repository for DOCKER_REPOSITORY"
+ fi
+
+ if [ "$dry_run" = "true" ]; then
+   echo "🚧 Dry run"
+ fi
+
+# Build tags arrays.
+tags=()
+tags_cloud_run=()
+
+IFS='/' read -ra arch <<< "$platform"
+IFS='.' read -ra semver <<< "$version"
+
+if [ "${#semver[@]}" -eq 3 ]; then
+  echo
+  echo "Semver version detected"
+
+  major="${semver[0]}"
+  minor="${semver[1]}"
+  patch="${semver[2]}"
+
+  tags+=("$DOCKER_REGISTRY/$DOCKER_REPOSITORY:latest-${arch[1]}")
+  tags+=("$DOCKER_REGISTRY/$DOCKER_REPOSITORY:$major-${arch[1]}")
+  tags+=("$DOCKER_REGISTRY/$DOCKER_REPOSITORY:$major.$minor-${arch[1]}")
+  tags+=("$DOCKER_REGISTRY/$DOCKER_REPOSITORY:$major.$minor.$patch-${arch[1]}")
+
+  if [ "$platform" = "linux/amd64" ]; then
+    tags_cloud_run+=("$DOCKER_REGISTRY/$DOCKER_REPOSITORY:latest-cloudrun")
+    tags_cloud_run+=("$DOCKER_REGISTRY/$DOCKER_REPOSITORY:$major-cloudrun")
+    tags_cloud_run+=("$DOCKER_REGISTRY/$DOCKER_REPOSITORY:$major.$minor-cloudrun")
+    tags_cloud_run+=("$DOCKER_REGISTRY/$DOCKER_REPOSITORY:$major.$minor.$patch-cloudrun")
+  fi
+else
+  echo
+  echo "Non-semver version detected, fallback to $version"
+
+  tags+=("$DOCKER_REGISTRY/$DOCKER_REPOSITORY:$version-${arch[1]}")
+  if [ "$platform" = "linux/amd64" ]; then
+    tags_cloud_run+=("$DOCKER_REGISTRY/$DOCKER_REPOSITORY:$version-cloudrun")
+  fi
+fi
+
+tags_flags=()
+tags_cloud_run_flags=()
+
+echo "Will push the following tags:"
+for tag in "${tags[@]}"; do
+  tags_flags+=("-t" "$tag")
+  echo "- $tag"
+done
+for tag in "${tags_cloud_run[@]}"; do
+  tags_cloud_run_flags+=("-t" "$tag")
+  echo "- $tag"
+done
+echo
+
+# Build and push images.
+run_cmd() {
+  local cmd="$1"
+
+  if [ "$dry_run" = "true" ]; then
+    echo "🚧 Dry run - would run the following command:"
+    echo "$cmd"
+    echo
+  else
+    echo "⚙️ Running command:"
+    echo "$cmd"
+    eval "$cmd"
+    echo
+  fi
+}
+
+join() {
+  local delimiter="$1"
+  shift
+  local IFS="$delimiter"
+  echo "$*"
+}
+
+cmd="docker buildx build \
+    --build-arg GOLANG_VERSION=$GOLANG_VERSION \
+    --build-arg GOTENBERG_VERSION=$version \
+    --build-arg GOTENBERG_USER_GID=$GOTENBERG_USER_GID \
+    --build-arg GOTENBERG_USER_UID=$GOTENBERG_USER_UID \
+    --build-arg NOTO_COLOR_EMOJI_VERSION=$NOTO_COLOR_EMOJI_VERSION \
+    --build-arg PDFTK_VERSION=$PDFTK_VERSION \
+    --build-arg PDFCPU_VERSION=$PDFCPU_VERSION \
+    --push \
+    --platform $platform \
+    ${tags_flags[*]} \
+    -f $DOCKERFILE $DOCKER_BUILD_CONTEXT
+"
+run_cmd "$cmd"
+
+if [ "$platform" != "linux/amd64" ]; then
+    echo "⚠️ Skip Cloud Run variant(s)"
+    echo "✅ Done!"
+    echo "tags=$(join "," "${tags[@]}")" >> "$GITHUB_OUTPUT"
+    echo "tags_cloud_run=$(join "," "${tags_cloud_run[@]}")" >> "$GITHUB_OUTPUT"
+    exit 0
+fi
+
+source_tag_cloud_run="$DOCKER_REGISTRY/$DOCKER_REPOSITORY:$version-${arch[1]}"
+cmd="docker pull $source_tag_cloud_run"
+run_cmd "$cmd"
+
+ target_tag_cloud_run="$DOCKER_REGISTRY/$DOCKER_REPOSITORY:$version"
+ cmd="docker image tag $source_tag_cloud_run $target_tag_cloud_run"
+ run_cmd "$cmd"
+
+cmd="docker build \
+    --build-arg DOCKER_REGISTRY=$DOCKER_REGISTRY \
+    --build-arg DOCKER_REPOSITORY=$DOCKER_REPOSITORY \
+    --build-arg GOTENBERG_VERSION=$version \
+    --push \
+    ${tags_cloud_run_flags[*]} \
+    -f $DOCKERFILE_CLOUDRUN $DOCKER_BUILD_CONTEXT
+"
+run_cmd "$cmd"
+
+echo "✅ Done!"
+echo "tags=$(join "," "${tags[@]}")" >> "$GITHUB_OUTPUT"
+echo "tags_cloud_run=$(join "," "${tags_cloud_run[@]}")" >> "$GITHUB_OUTPUT"
+exit 0

.github/actions/clean/action.yml

@@ -0,0 +1,31 @@
+name: Clean
+description: Clean tags from Docker Hub
+author: Julien Neuhart
+
+inputs:
+  docker_hub_username:
+    description: The Docker Hub username
+    required: true
+  docker_hub_password:
+    description: The Docker Hub password
+    required: true
+  tags:
+    description: Comma separated list of tags to clean
+  snapshot_version:
+    description: Snapshot version to clean
+  dry_run:
+    description: Dry run this action
+
+runs:
+  using: composite
+  steps:
+    - name: Clean tags from Docker Hub
+      env:
+        DOCKERHUB_USERNAME: ${{ inputs.docker_hub_username }}
+        DOCKERHUB_TOKEN: ${{ inputs.docker_hub_password }}
+      shell: bash
+      run: |
+        .github/actions/clean/clean.sh \
+          --tags "${{ inputs.tags }}" \
+          --snapshot-version "${{ inputs.snapshot_version }}" \
+          --dry-run "${{ inputs.dry_run }}"

.github/actions/clean/clean.sh

@@ -0,0 +1,122 @@
+#!/bin/bash
+
+# Exit early.
+# See: https://www.gnu.org/savannah-checkouts/gnu/bash/manual/bash.html#The-Set-Builtin.
+set -e
+
+# Source dot env file.
+source .env
+
+# Arguments.
+tags=""
+snapshot_version=""
+dry_run=""
+
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    --tags)
+      tags="$2"
+      shift 2
+      ;;
+    --snapshot-version)
+      snapshot_version="${2//v}"
+      shift 2
+      ;;
+    --dry-run)
+      dry_run="$2"
+      shift 2
+      ;;
+    *)
+      echo "Unknown option $1"
+      exit 1
+      ;;
+  esac
+done
+
+echo "Clean tag(s) from Docker Hub 🧹"
+echo
+
+IFS=',' read -ra tags_to_delete <<< "$tags"
+if [ -n "$snapshot_version" ]; then
+  tags_to_delete+=("$DOCKER_REGISTRY/snapshot:$snapshot_version")
+  tags_to_delete+=("$DOCKER_REGISTRY/snapshot:$snapshot_version-cloudrun")
+fi
+
+echo "Will delete the following tag(s):"
+for tag in "${tags_to_delete[@]}"; do
+  echo "- $tag"
+done
+
+ if [ "$dry_run" = "true" ]; then
+   echo "🚧 Dry run"
+ fi
+echo
+
+# Delete tags.
+base_url="https://hub.docker.com/v2"
+token=""
+
+if [ "$dry_run" = "true" ]; then
+  token="placeholder"
+  echo "🚧 Dry run - would call $base_url to get a token"
+  echo
+else
+    echo "🌐 Get token from $base_url"
+
+    readarray -t lines < <(
+      curl -s -X POST \
+           -H "Content-Type: application/json" \
+           -d "{\"username\":\"$DOCKERHUB_USERNAME\", \"password\":\"$DOCKERHUB_TOKEN\"}" \
+           -w "\n%{http_code}" \
+           "$base_url/users/login"
+    )
+
+    http_code="${lines[-1]}"
+    unset 'lines[-1]'
+    json_body=$(printf "%s\n" "${lines[@]}")
+
+    if [ "$http_code" -ne "200" ]; then
+      echo "❌ Wrong HTTP status - $http_code"
+      echo "$json_body"
+      exit 1
+    fi
+
+    token=$(jq -r '.token' <<< "$json_body")
+    echo
+fi
+
+if [ -z "$token" ]; then
+  echo "❌ No token from Docker Hub"
+  exit 1
+fi
+
+for tag in "${tags_to_delete[@]}"; do
+  if [ "$dry_run" = "true" ]; then
+    echo "🚧 Dry run - would call $base_url to delete tag $tag"
+    echo
+  else
+      echo "🌐 Delete tag $tag"
+      IFS=':' read -ra tag_parts <<< "$tag"
+
+      readarray -t lines < <(
+        curl -s -X DELETE \
+             -H "Authorization: Bearer $token" \
+             -w "\n%{http_code}" \
+             "$base_url/repositories/${tag_parts[0]}/tags/${tag_parts[1]}/"
+      )
+
+      http_code="${lines[-1]}"
+      unset 'lines[-1]'
+
+      if [ "$http_code" -ne "200" ] && [ "$http_code" -ne "204" ]; then
+        echo "❌ Wrong HTTP status - $http_code"
+        printf '%s\n' "${lines[@]}"
+        exit 1
+      fi
+
+      echo
+  fi
+done
+
+echo "✅ Done!"
+exit 0

.github/actions/merge/action.yml

@@ -0,0 +1,48 @@
+name: Merge
+description: Merge tags to single multi-platform tags
+author: Julien Neuhart
+
+inputs:
+  github_token:
+    description: The GitHub token
+    required: true
+    default: ${{ github.token }}
+  docker_hub_username:
+    description: The Docker Hub username
+    required: true
+  docker_hub_password:
+    description: The Docker Hub password
+    required: true
+  tags:
+    description: Comma separated tags to merge
+    required: true
+  alternate_registry:
+    description: Alternate registry to also push resulting tags
+  dry_run:
+    description: Dry run this action
+
+runs:
+  using: composite
+  steps:
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Check out code
+      uses: actions/checkout@v4
+
+    - name: Log in to Docker Hub
+      uses: docker/login-action@v3
+      with:
+        username: ${{ inputs.docker_hub_username }}
+        password: ${{ inputs.docker_hub_password }}
+
+    - name: Merge
+      shell: bash
+      run: |
+        .github/actions/merge/merge.sh \
+          --tags "${{ inputs.tags }}" \
+          --alternate-registry "${{ inputs.alternate_registry }}" \
+          --dry-run "${{ inputs.dry_run }}"

.github/actions/merge/merge.sh

@@ -0,0 +1,109 @@
+#!/bin/bash
+
+# Exit early.
+# See: https://www.gnu.org/savannah-checkouts/gnu/bash/manual/bash.html#The-Set-Builtin.
+set -e
+
+# Source dot env file.
+source .env
+
+# Arguments.
+tags=""
+alternate_registry=""
+dry_run=""
+
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    --tags)
+      tags="$2"
+      shift 2
+      ;;
+    --alternate-registry)
+      alternate_registry="$2"
+      shift 2
+      ;;
+    --dry-run)
+      dry_run=$2
+      shift 2
+      ;;
+    *)
+      echo "Unknown option $1"
+      exit 1
+      ;;
+  esac
+done
+
+echo "Merge tag(s) 👷"
+echo
+
+echo "Tag(s) to merge:"
+IFS=',' read -ra tags_to_merge <<< "$tags"
+for tag in "${tags_to_merge[@]}"; do
+  echo "- $tag"
+done
+
+if [ -n "$alternate_registry" ]; then
+  echo "⚠️ Will also push to $alternate_registry registry"
+fi
+
+ if [ "$dry_run" = "true" ]; then
+   echo "🚧 Dry run"
+ fi
+
+ echo
+
+ # Build merge map.
+ declare -A merge_map
+
+ for tag in "${tags_to_merge[@]}"; do
+   target_tag="${tag//-amd64/}"
+   target_tag="${target_tag//-arm64/}"
+   target_tag="${target_tag//-arm/}"
+   target_tag="${target_tag//-386/}"
+
+   merge_map["$target_tag"]+="$tag "
+ done
+
+# Merge tags.
+run_cmd() {
+  local cmd="$1"
+
+  if [ "$dry_run" = "true" ]; then
+    echo "🚧 Dry run - would run the following command:"
+    echo "$cmd"
+    echo
+  else
+    echo "⚙️ Running command:"
+    echo "$cmd"
+    eval "$cmd"
+    echo
+  fi
+}
+
+ for target in "${!merge_map[@]}"; do
+   IFS=' ' read -ra source_tags <<< "${merge_map[$target]}"
+
+   cmd="docker buildx imagetools create \
+       -t $target \
+       ${source_tags[*]}
+   "
+   run_cmd "$cmd"
+
+   echo "➡️ $target pushed"
+   echo
+   if [ -n "$alternate_registry" ]; then
+     alternate_target="${target/$DOCKER_REGISTRY/$alternate_registry}"
+     cmd="docker buildx imagetools create \
+            -t $alternate_target \
+            $target
+        "
+        run_cmd "$cmd"
+
+        echo "➡️ $alternate_target pushed"
+        echo
+   fi
+ done
+
+
+echo "✅ Done!"
+exit 0

.github/dependabot.yml

@@ -1,8 +1,7 @@
 version: 2
 updates:
-
   # Maintain dependencies for GitHub Actions
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "weekly"

.github/workflows/__build-push.yml

@@ -1,51 +0,0 @@
-on:
-  workflow_call:
-    inputs:
-      runs_on:
-        type: string
-        required: true
-      platform:
-        type: string
-        required: true
-      gotenberg_version:
-        type: string
-        required: true
-      alternate_repository:
-        type: string
-        default: ''
-    outputs:
-      tags:
-        value: ${{ jobs.build_push.outputs.tags }}
-
-permissions:
-  contents: read
-
-jobs:
-  build_push:
-    name: Build and push Docker images
-    runs-on: ${{ inputs.runs_on }}
-    outputs:
-      tags: ${{ steps.build_push.outputs.tags }}
-    steps:
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Check out code
-        uses: actions/checkout@v4
-
-      - name: Log in to Docker Hub
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      - name: Build and push ${{ inputs.platform }}
-        id: build_push
-        uses: gotenberg/gotenberg-release-action/actions/build-push@main
-        with:
-          version: ${{ inputs.gotenberg_version }}
-          platform: ${{ inputs.platform }}
-          alternate_repository: ${{ inputs.alternate_repository }}

.github/workflows/__delete.yml

@@ -1,28 +0,0 @@
-on:
-  workflow_call:
-    inputs:
-      gotenberg_version:
-        type: string
-        required: true
-      alternate_repository:
-        type: string
-        default: ''
-
-permissions:
-  contents: read
-
-jobs:
-  delete:
-    name: Delete Docker images
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check out code
-        uses: actions/checkout@v4
-
-      - name: Delete
-        uses: gotenberg/gotenberg-release-action/actions/delete@main
-        with:
-          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
-          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
-          version: ${{ inputs.gotenberg_version }}
-          alternate_repository: ${{ inputs.alternate_repository }}

.github/workflows/__merge-clean.yml

@@ -1,40 +0,0 @@
-on:
-  workflow_call:
-    inputs:
-      tags:
-        type: string
-        required: true
-      alternate_registry:
-        type: string
-        default: ''
-
-permissions:
-  contents: read
-
-jobs:
-  merge_clean:
-    name: Merge and clean Docker images
-    runs-on: ubuntu-latest
-    steps:
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Check out code
-        uses: actions/checkout@v4
-
-      - name: Log in to Docker Hub
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      - name: Merge and clean
-        uses: gotenberg/gotenberg-release-action/actions/merge-clean@main
-        with:
-          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
-          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
-          tags: ${{ inputs.tags }}
-          alternate_registry: ${{ inputs.alternate_registry }}

.github/workflows/continuous-delivery.yml

@@ -2,7 +2,7 @@ name: Continuous Delivery
 
 on:
   release:
-    types: [ published ]
+    types: [published]
 
 permissions:
   contents: read
@@ -10,39 +10,79 @@ permissions:
 jobs:
   release_amd64:
     name: Release linux/amd64
-    uses: ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-latest
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-latest
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/amd64
+    steps:
-      gotenberg_version: ${{ github.event.release.tag_name }}
+      - name: Checkout source code
+        uses: actions/checkout@v4
+
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: ${{ github.event.release.tag_name }}
+          platform: linux/amd64
 
   release_386:
     name: Release linux/386
-    uses: ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-latest
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-latest
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/386
+    steps:
-      gotenberg_version: ${{ github.event.release.tag_name }}
+      - name: Checkout source code
+        uses: actions/checkout@v4
+
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: ${{ github.event.release.tag_name }}
+          platform: linux/386
 
   release_arm64:
     name: Release linux/arm64
-    uses: ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-24.04-arm
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-24.04-arm
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/arm64
+    steps:
-      gotenberg_version: ${{ github.event.release.tag_name }}
+      - name: Checkout source code
+        uses: actions/checkout@v4
+
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: ${{ github.event.release.tag_name }}
+          platform: linux/arm64
 
   release_arm_v7:
     name: Release linux/arm/v7
-    uses: ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-24.04-arm
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-24.04-arm
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/arm/v7
+    steps:
-      gotenberg_version: ${{ github.event.release.tag_name }}
+      - name: Checkout source code
+        uses: actions/checkout@v4
+
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: ${{ github.event.release.tag_name }}
+          platform: linux/arm/v7
 
   merge_clean_release_tags:
     needs:
@@ -51,8 +91,22 @@ jobs:
       - release_arm64
       - release_arm_v7
     name: Merge and clean release tags
-    uses: ./.github/workflows/__merge-clean.yml
+    runs-on: ubuntu-latest
-    secrets: inherit
+    steps:
-    with:
+      - name: Checkout source code
-      tags: "${{ needs.release_amd64.outputs.tags }},${{ needs.release_386.outputs.tags }},${{ needs.release_arm64.outputs.tags }},${{ needs.release_arm_v7.outputs.tags }}"
+        uses: actions/checkout@v4
-      alternate_registry: thecodingmachine
+
+      - name: Merge
+        uses: ./.github/actions/merge
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          tags: "${{ needs.release_amd64.outputs.tags }},${{ needs.release_386.outputs.tags }},${{ needs.release_arm64.outputs.tags }},${{ needs.release_arm_v7.outputs.tags }}"
+          alternate_registry: thecodingmachine
+
+      - name: Clean
+        uses: ./.github/actions/clean
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          tags: "${{ needs.release_amd64.outputs.tags }},${{ needs.release_386.outputs.tags }},${{ needs.release_arm64.outputs.tags }},${{ needs.release_arm_v7.outputs.tags }}"

.github/workflows/continuous-integration.yml

@@ -16,7 +16,6 @@ permissions:
   contents: write
 
 jobs:
-
   lint:
     name: Lint
     runs-on: ubuntu-latest
@@ -24,7 +23,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.23'
+          go-version: "1.23"
           cache: false
 
       - name: Checkout source code
@@ -33,7 +32,7 @@ jobs:
       - name: Run linters
         uses: golangci/golangci-lint-action@v6
         with:
-          version: v1.63.4
+          version: v1.64.2
 
   tests:
     needs:
@@ -57,7 +56,7 @@ jobs:
         run: make tests-once
 
       - name: Upload to Codecov
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           verbose: true
@@ -65,54 +64,94 @@ jobs:
   snapshot_amd64:
     if: github.event_name == 'pull_request'
     needs:
-      - tests
+     - tests
     name: Snapshot linux/amd64
-    uses:  ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-latest
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-latest
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/amd64
+    steps:
-      gotenberg_version: pr-${{ github.event.pull_request.number }}
+      - name: Checkout source code
-      alternate_repository: snapshot
+        uses: actions/checkout@v4
+        
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: pr-${{ github.event.pull_request.number }}
+          platform: linux/amd64
+          alternate_repository: snapshot
 
   snapshot_386:
     if: github.event_name == 'pull_request'
     needs:
-      - tests
+     - tests
     name: Snapshot linux/386
-    uses:  ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-latest
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-latest
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/386
+    steps:
-      gotenberg_version: pr-${{ github.event.pull_request.number }}
+      - name: Checkout source code
-      alternate_repository: snapshot
+        uses: actions/checkout@v4
+        
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: pr-${{ github.event.pull_request.number }}
+          platform: linux/386
+          alternate_repository: snapshot
 
   snapshot_arm64:
     if: github.event_name == 'pull_request'
     needs:
-      - tests
+     - tests
     name: Snapshot linux/arm64
-    uses:  ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-24.04-arm
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-24.04-arm
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/arm64
+    steps:
-      gotenberg_version: pr-${{ github.event.pull_request.number }}
+      - name: Checkout source code
-      alternate_repository: snapshot
+        uses: actions/checkout@v4
+        
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: pr-${{ github.event.pull_request.number }}
+          platform: linux/arm64
+          alternate_repository: snapshot
 
   snapshot_arm_v7:
     if: github.event_name == 'pull_request'
     needs:
-      - tests
+     - tests
     name: Snapshot linux/arm/v7
-    uses:  ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-24.04-arm
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-24.04-arm
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/arm/v7
+    steps:
-      gotenberg_version: pr-${{ github.event.pull_request.number }}
+      - name: Checkout source code
-      alternate_repository: snapshot
+        uses: actions/checkout@v4
+        
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: pr-${{ github.event.pull_request.number }}
+          platform: linux/arm/v7
+          alternate_repository: snapshot
 
   merge_clean_snapshot_tags:
     needs:
@@ -121,58 +160,112 @@ jobs:
       - snapshot_arm64
       - snapshot_arm_v7
     name: Merge and clean snapshot tags
-    uses:  ./.github/workflows/__merge-clean.yml
+    runs-on: ubuntu-latest
-    secrets: inherit
+    steps:
-    with:
+      - name: Checkout source code
-      tags: "${{ needs.snapshot_amd64.outputs.tags }},${{ needs.snapshot_386.outputs.tags }},${{ needs.snapshot_arm64.outputs.tags }},${{ needs.snapshot_arm_v7.outputs.tags }}"
+        uses: actions/checkout@v4
+        
+      - name: Merge
+        uses: ./.github/actions/merge
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          tags: "${{ needs.snapshot_amd64.outputs.tags }},${{ needs.snapshot_386.outputs.tags }},${{ needs.snapshot_arm64.outputs.tags }},${{ needs.snapshot_arm_v7.outputs.tags }}"
+
+      - name: Clean
+        uses: ./.github/actions/clean
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          tags: "${{ needs.snapshot_amd64.outputs.tags }},${{ needs.snapshot_386.outputs.tags }},${{ needs.snapshot_arm64.outputs.tags }},${{ needs.snapshot_arm_v7.outputs.tags }}"
 
   edge_amd64:
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     needs:
-      - tests
+     - tests
     name: Edge linux/amd64
-    uses:  ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-latest
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-latest
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/amd64
+    steps:
-      gotenberg_version: edge
+      - name: Checkout source code
+        uses: actions/checkout@v4
+        
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: edge
+          platform: linux/amd64
 
   edge_386:
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     needs:
       - tests
     name: Edge linux/386
-    uses:  ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-latest
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-latest
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/386
+    steps:
-      gotenberg_version: edge
+      - name: Checkout source code
+        uses: actions/checkout@v4
+        
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: edge
+          platform: linux/386
 
   edge_arm64:
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     needs:
-      - tests
+     - tests
     name: Edge linux/arm64
-    uses:  ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-24.04-arm
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-24.04-arm
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/arm64
+    steps:
-      gotenberg_version: edge
+      - name: Checkout source code
+        uses: actions/checkout@v4
+        
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: edge
+          platform: linux/arm64
 
   edge_arm_v7:
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     needs:
-      - tests
+     - tests
     name: Edge linux/arm/v7
-    uses:  ./.github/workflows/__build-push.yml
+    runs-on: ubuntu-24.04-arm
-    secrets: inherit
+    outputs:
-    with:
+      tags: ${{ steps.build_push.outputs.tags }}
-      runs_on: ubuntu-24.04-arm
+      tags_cloud_run: ${{ steps.build_push.outputs.tags_cloud_run }}
-      platform: linux/arm/v7
+    steps:
-      gotenberg_version: edge
+      - name: Checkout source code
+        uses: actions/checkout@v4
+        
+      - name: Build and push
+        id: build_push
+        uses: ./.github/actions/build-push
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          version: edge
+          platform: linux/arm/v7
 
   merge_clean_edge_tags:
     needs:
@@ -181,8 +274,22 @@ jobs:
       - edge_arm64
       - edge_arm_v7
     name: Merge and clean edge tags
-    uses: ./.github/workflows/__merge-clean.yml
+    runs-on: ubuntu-latest
-    secrets: inherit
+    steps:
-    with:
+      - name: Checkout source code
-      tags: "${{ needs.edge_amd64.outputs.tags }},${{ needs.edge_386.outputs.tags }},${{ needs.edge_arm64.outputs.tags }},${{ needs.edge_arm_v7.outputs.tags }}"
+        uses: actions/checkout@v4
-      alternate_registry: thecodingmachine
+        
+      - name: Merge
+        uses: ./.github/actions/merge
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          tags: "${{ needs.edge_amd64.outputs.tags }},${{ needs.edge_386.outputs.tags }},${{ needs.edge_arm64.outputs.tags }},${{ needs.edge_arm_v7.outputs.tags }}"
+          alternate_registry: thecodingmachine
+
+      - name: Clean
+        uses: ./.github/actions/clean
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          tags: "${{ needs.edge_amd64.outputs.tags }},${{ needs.edge_386.outputs.tags }},${{ needs.edge_arm64.outputs.tags }},${{ needs.edge_arm_v7.outputs.tags }}"

.github/workflows/pull-request-cleanup.yml

@@ -2,17 +2,22 @@ name: Pull Request Cleanup
 
 on:
   pull_request:
-    types: [ closed ]
+    types: [closed]
 
 permissions:
   contents: read
 
 jobs:
-
   cleanup:
-    name: Cleanup
+    name: Cleanup Docker images
-    uses: ./.github/workflows/__delete.yml
+    runs-on: ubuntu-latest
-    secrets: inherit
+    steps:
-    with:
+      - name: Check out code
-      gotenberg_version: pr-${{ github.event.pull_request.number }}
+        uses: actions/checkout@v4
-      alternate_repository: snapshot
+
+      - name: Cleanup
+        uses: ./.github/actions/clean
+        with:
+          docker_hub_username: ${{ secrets.DOCKERHUB_USERNAME }}
+          docker_hub_password: ${{ secrets.DOCKERHUB_TOKEN }}
+          snapshot_version: pr-${{ github.event.pull_request.number }}

.golangci.yml

@@ -37,12 +37,12 @@ linters:
     - promlinter
     #- sloglint
     - staticcheck
-    - tenv
     - testableexamples
     - tparallel
     - typecheck
     - unconvert
     - unused
+    - usetesting
     - wastedassign
     - whitespace
 

Makefile

@@ -37,6 +37,7 @@ API-DOWNLOAD-FROM-DENY-LIST=
 API-DOWNLOAD-FROM-FROM-MAX-RETRY=4
 API-DISABLE-DOWNLOAD-FROM=false
 API_DISABLE_HEALTH_CHECK_LOGGING=false
+API_ENABLE_DEBUG_ROUTE=false
 CHROMIUM_RESTART_AFTER=10
 CHROMIUM_MAX_QUEUE_SIZE=0
 CHROMIUM_AUTO_START=false
@@ -62,6 +63,7 @@ LIBREOFFICE_DISABLE_ROUTES=false
 LOG_LEVEL=info
 LOG_FORMAT=auto
 LOG_FIELDS_PREFIX=
+LOG_ENABLE_GCP_SEVERITY=false
 PDFENGINES_ENGINES=
 PDFENGINES_MERGE_ENGINES=qpdf,pdfcpu,pdftk
 PDFENGINES_SPLIT_ENGINES=pdfcpu,qpdf,pdftk
@@ -107,6 +109,7 @@ run: ## Start a Gotenberg container
 	--api-download-from-max-retry=$(API-DOWNLOAD-FROM-FROM-MAX-RETRY) \
 	--api-disable-download-from=$(API-DISABLE-DOWNLOAD-FROM) \
 	--api-disable-health-check-logging=$(API_DISABLE_HEALTH_CHECK_LOGGING) \
+	--api-enable-debug-route=$(API_ENABLE_DEBUG_ROUTE) \
 	--chromium-restart-after=$(CHROMIUM_RESTART_AFTER) \
 	--chromium-auto-start=$(CHROMIUM_AUTO_START) \
 	--chromium-max-queue-size=$(CHROMIUM_MAX_QUEUE_SIZE) \
@@ -132,10 +135,11 @@ run: ## Start a Gotenberg container
 	--log-level=$(LOG_LEVEL) \
 	--log-format=$(LOG_FORMAT) \
 	--log-fields-prefix=$(LOG_FIELDS_PREFIX) \
+	--log-enable-gcp-severity=$(LOG_ENABLE_GCP_SEVERITY) \
 	--pdfengines-engines=$(PDFENGINES_ENGINES) \
 	--pdfengines-merge-engines=$(PDFENGINES_MERGE_ENGINES) \
 	--pdfengines-split-engines=$(PDFENGINES_SPLIT_ENGINES) \
-	--pdfengines-convert-engines=$(PDFENGINES_FLATTEN_ENGINES) \
+	--pdfengines-flatten-engines=$(PDFENGINES_FLATTEN_ENGINES) \
 	--pdfengines-convert-engines=$(PDFENGINES_CONVERT_ENGINES) \
 	--pdfengines-read-metadata-engines=$(PDFENGINES_READ_METADATA_ENGINES) \
 	--pdfengines-write-metadata-engines=$(PDFENGINES_WRITE_METADATA_ENGINES) \

README.md

@@ -1,7 +1,7 @@
 <p align="center">
     <img src="https://user-images.githubusercontent.com/8983173/130322857-185831e2-f041-46eb-a17f-0a69d066c4e5.png" alt="Gotenberg Logo" width="150" height="150" />
     <h3 align="center">Gotenberg</h3>
-    <p align="center">A Docker-powered stateless API for PDF files</p>
+    <p align="center">A containerized API for seamless PDF conversion</p>
     <p align="center">
         <a href="https://hub.docker.com/r/gotenberg/gotenberg"><img alt="Total downloads (gotenberg/gotenberg)" src="https://img.shields.io/docker/pulls/gotenberg/gotenberg"></a>
         <a href="https://hub.docker.com/r/thecodingmachine/gotenberg"><img alt="Total downloads (thecodingmachine/gotenberg)" src="https://img.shields.io/docker/pulls/thecodingmachine/gotenberg"></a>
@@ -45,6 +45,9 @@ Head to the [documentation](https://gotenberg.dev/docs/getting-started/introduct
     <a href="https://zolsec.com?utm_source=gotenberg_github&utm_medium=website" target="_blank">
         <img src="https://github.com/gotenberg/gotenberg/assets/8983173/707ccc97-a79b-4dcb-8fc8-6827366e5be3" alt="Zolsec Logo" width="333" height="163" />
     </a>
+    <a href="https://pdfme.com?utm_source=gotenberg_github&utm_medium=website" target="_blank">
+        <img src="https://github.com/user-attachments/assets/2a75dd40-ca18-4d34-acd5-5dd474595168" alt="pdfme Logo" width="333" height="163" />
+    </a>
 </p>
 
 Sponsorships help maintaining and improving Gotenberg - [become a sponsor](https://github.com/sponsors/gulien) ❤️

build/Dockerfile

@@ -63,7 +63,7 @@ ARG NOTO_COLOR_EMOJI_VERSION
 ARG PDFTK_VERSION
 
 LABEL org.opencontainers.image.title="Gotenberg" \
-      org.opencontainers.image.description="A Docker-powered stateless API for PDF files." \
+      org.opencontainers.image.description="A containerized API for seamless PDF conversion." \
       org.opencontainers.image.version="$GOTENBERG_VERSION" \
       org.opencontainers.image.authors="Julien Neuhart <neuhart.julien@gmail.com>" \
       org.opencontainers.image.documentation="https://gotenberg.dev" \
@@ -171,7 +171,7 @@ RUN \
     apt-get update -qq &&\
     apt-get upgrade -yqq &&\
     DEBIAN_FRONTEND=noninteractive apt-get install -y -qq --no-install-recommends -t bookworm-backports libreoffice &&\
-    curl -Ls https://raw.githubusercontent.com/gotenberg/unoconverter/v0.0.1/unoconv -o /usr/bin/unoconverter &&\
+    curl -Ls https://raw.githubusercontent.com/gotenberg/unoconverter/v0.1.1/unoconv -o /usr/bin/unoconverter &&\
     chmod +x /usr/bin/unoconverter &&\
     # unoconverter will look for the Python binary, which has to be at version 3.
     ln -s /usr/bin/python3 /usr/bin/python &&\

cmd/gotenberg.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"os/signal"
+	"strings"
 	"syscall"
 	"time"
 
@@ -23,7 +24,7 @@ const banner = `
 \___/\___/\__/\__/_//_/_.__/\__/_/  \_, / 
                                    /___/
 
-A Docker-powered stateless API for PDF files.
+A containerized API for seamless PDF conversion.
 Version: %s
 -------------------------------------------------------
 `
@@ -50,14 +51,42 @@ func Run() {
 
 	fmt.Printf("[SYSTEM] modules: %s\n", modsInfo)
 
-	// Parse the flags...
+	// Parse the flags.
 	err := fs.Parse(os.Args[1:])
 	if err != nil {
 		fmt.Println(err)
 		os.Exit(1)
 	}
 
-	// ...and create a wrapper around those.
+	// Override their values if the corresponding environment variables are
+	// set.
+	fs.VisitAll(func(f *flag.Flag) {
+		envName := strings.ToUpper(strings.ReplaceAll(f.Name, "-", "_"))
+		val, ok := os.LookupEnv(envName)
+		if !ok {
+			return
+		}
+
+		sliceVal, ok := f.Value.(flag.SliceValue)
+		if ok {
+			// We don't want to append the values (default pflag behavior).
+			items := strings.Split(val, ",")
+			err = sliceVal.Replace(items)
+			if err != nil {
+				fmt.Printf("[FATAL] invalid overriding value '%s' from %s: %v\n", val, envName, err)
+				os.Exit(1)
+			}
+			return
+		}
+
+		err = f.Value.Set(val)
+		if err != nil {
+			fmt.Printf("[FATAL] invalid overriding value '%s' from %s: %v\n", val, envName, err)
+			os.Exit(1)
+		}
+	})
+
+	// Create a wrapper around our flags.
 	parsedFlags := gotenberg.ParsedFlags{FlagSet: fs}
 
 	// Get the graceful shutdown duration.
@@ -108,6 +137,9 @@ func Run() {
 		}(l.(gotenberg.SystemLogger))
 	}
 
+	// Build the debug data.
+	gotenberg.BuildDebug(ctx)
+
 	quit := make(chan os.Signal, 1)
 
 	// We'll accept graceful shutdowns when quit via SIGINT (Ctrl+C) or SIGTERM (Kubernetes).

go.mod

@@ -1,72 +1,79 @@
 module github.com/gotenberg/gotenberg/v8
 
-go 1.23.0
+go 1.24.0
 
 require (
 	github.com/alexliesenfeld/health v0.8.0
 	github.com/andybalholm/brotli v1.1.1 // indirect
 	github.com/barasher/go-exiftool v1.10.0
-	github.com/chromedp/cdproto v0.0.0-20250126231910-1730200a0f74
+	github.com/chromedp/cdproto v0.0.0-20250311215558-29dfcc2791de
-	github.com/chromedp/chromedp v0.12.1
+	github.com/chromedp/chromedp v0.13.1
-	github.com/golang/snappy v0.0.4 // indirect
 	github.com/google/uuid v1.6.0
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/hashicorp/go-retryablehttp v0.7.7
-	github.com/klauspost/compress v1.17.11 // indirect
+	github.com/klauspost/compress v1.18.0 // indirect
 	github.com/klauspost/pgzip v1.2.6 // indirect
 	github.com/labstack/echo/v4 v4.13.3
 	github.com/labstack/gommon v0.4.2
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mholt/archiver/v3 v3.5.1
 	github.com/microcosm-cc/bluemonday v1.0.27
-	github.com/nwaples/rardecode v1.1.3 // indirect
 	github.com/pierrec/lz4/v4 v4.1.22 // indirect
-	github.com/prometheus/client_golang v1.20.5
+	github.com/prometheus/client_golang v1.21.1
 	github.com/russross/blackfriday/v2 v2.1.0
 	github.com/spf13/pflag v1.0.6
 	github.com/ulikunitz/xz v0.5.12 // indirect
 	go.uber.org/multierr v1.11.0
 	go.uber.org/zap v1.27.0
-	golang.org/x/crypto v0.32.0 // indirect
+	golang.org/x/crypto v0.36.0 // indirect
-	golang.org/x/net v0.34.0
+	golang.org/x/net v0.37.0
-	golang.org/x/sync v0.10.0
+	golang.org/x/sync v0.12.0
-	golang.org/x/sys v0.29.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
-	golang.org/x/term v0.28.0
+	golang.org/x/term v0.30.0
-	golang.org/x/text v0.21.0
+	golang.org/x/text v0.23.0
 )
 
 require (
-	github.com/dlclark/regexp2 v1.11.4
+	github.com/dlclark/regexp2 v1.11.5
-	github.com/shirou/gopsutil/v4 v4.24.12
+	github.com/mholt/archives v0.1.0
+	github.com/shirou/gopsutil/v4 v4.25.2
 )
 
 require (
+	github.com/STARRY-S/zip v0.2.2 // indirect
 	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/bodgit/plumbing v1.3.0 // indirect
+	github.com/bodgit/sevenzip v1.6.0 // indirect
+	github.com/bodgit/windows v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/chromedp/sysutil v1.1.0 // indirect
-	github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5 // indirect
+	github.com/dsnet/compress v0.0.2-0.20230904184137-39efe44ab707 // indirect
 	github.com/ebitengine/purego v0.8.2 // indirect
+	github.com/go-json-experiment/json v0.0.0-20250223041408-d3c622f1b874 // indirect
 	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/gobwas/ws v1.4.0 // indirect
 	github.com/gorilla/css v1.0.1 // indirect
-	github.com/josharian/intern v1.0.0 // indirect
+	github.com/hashicorp/errwrap v1.1.0 // indirect
-	github.com/lufia/plan9stats v0.0.0-20240909124753-873cd0166683 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
-	github.com/mailru/easyjson v0.9.0 // indirect
+	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
+	github.com/lufia/plan9stats v0.0.0-20250303091104-876f3ea5145d // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/nwaples/rardecode/v2 v2.1.1 // indirect
 	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
-	github.com/prometheus/common v0.62.0 // indirect
+	github.com/prometheus/common v0.63.0 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
-	github.com/tklauser/go-sysconf v0.3.14 // indirect
+	github.com/sorairolake/lzip-go v0.3.5 // indirect
-	github.com/tklauser/numcpus v0.9.0 // indirect
+	github.com/therootcompany/xz v1.0.1 // indirect
+	github.com/tklauser/go-sysconf v0.3.15 // indirect
+	github.com/tklauser/numcpus v0.10.0 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasttemplate v1.2.2 // indirect
-	github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8 // indirect
 	github.com/yusufpapurcu/wmi v1.2.4 // indirect
-	golang.org/x/time v0.9.0 // indirect
+	go4.org v0.0.0-20230225012048-214862532bf5 // indirect
-	google.golang.org/protobuf v1.36.4 // indirect
+	golang.org/x/time v0.11.0 // indirect
+	google.golang.org/protobuf v1.36.5 // indirect
 )

go.sum

@@ -1,6 +1,26 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/STARRY-S/zip v0.2.2 h1:8QeCbIi1Z9U5MgoDARJR1ClbBo9RD46SmVy+dl0woCk=
+github.com/STARRY-S/zip v0.2.2/go.mod h1:lqJ9JdeRipyOQJrYSOtpNAiaesFO6zVDsE8GIGFaoSk=
 github.com/alexliesenfeld/health v0.8.0 h1:lCV0i+ZJPTbqP7LfKG7p3qZBl5VhelwUFCIVWl77fgk=
 github.com/alexliesenfeld/health v0.8.0/go.mod h1:TfNP0f+9WQVWMQRzvMUjlws4ceXKEL3WR+6Hp95HUFc=
-github.com/andybalholm/brotli v1.0.1/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
 github.com/andybalholm/brotli v1.1.1 h1:PR2pgnyFznKEugtsUo0xLdDop5SKXd5Qf5ysW+7XdTA=
 github.com/andybalholm/brotli v1.1.1/go.mod h1:05ib4cKhjx3OQYUY22hTVd34Bc8upXjOLL2rKwwZBoA=
 github.com/aymerick/douceur v0.2.0 h1:Mv+mAeH1Q+n9Fr+oyamOlAkUNPWPlA8PPGR0QAaYuPk=
@@ -9,26 +29,43 @@ github.com/barasher/go-exiftool v1.10.0 h1:f5JY5jc42M7tzR6tbL9508S2IXdIcG9QyieEX
 github.com/barasher/go-exiftool v1.10.0/go.mod h1:F9s/a3uHSM8YniVfwF+sbQUtP8Gmh9nyzigNF+8vsWo=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/bodgit/plumbing v1.3.0 h1:pf9Itz1JOQgn7vEOE7v7nlEfBykYqvUYioC61TwWCFU=
+github.com/bodgit/plumbing v1.3.0/go.mod h1:JOTb4XiRu5xfnmdnDJo6GmSbSbtSyufrsyZFByMtKEs=
+github.com/bodgit/sevenzip v1.6.0 h1:a4R0Wu6/P1o1pP/3VV++aEOcyeBxeO/xE2Y9NSTrr6A=
+github.com/bodgit/sevenzip v1.6.0/go.mod h1:zOBh9nJUof7tcrlqJFv1koWRrhz3LbDbUNngkuZxLMc=
+github.com/bodgit/windows v1.0.1 h1:tF7K6KOluPYygXa3Z2594zxlkbKPAOvqr97etrGNIz4=
+github.com/bodgit/windows v1.0.1/go.mod h1:a6JLwrB4KrTR5hBpp8FI9/9W9jJfeQ2h4XDXU74ZCdM=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/chromedp/cdproto v0.0.0-20250126231910-1730200a0f74 h1:oul0R+ZyorVxVNr7bALbPolKvbXlpIefB4lDv5sjt00=
+github.com/chromedp/cdproto v0.0.0-20250311215558-29dfcc2791de h1:tOKSCbB420VENW1Wz10EnSXr4jLnWoq25vnBW4ScmF0=
-github.com/chromedp/cdproto v0.0.0-20250126231910-1730200a0f74/go.mod h1:RTGuBeCeabAJGi3OZf71a6cGa7oYBfBP75VJZFLv6SU=
+github.com/chromedp/cdproto v0.0.0-20250311215558-29dfcc2791de/go.mod h1:NItd7aLkcfOA/dcMXvl8p1u+lQqioRMq/SqDp71Pb/k=
-github.com/chromedp/chromedp v0.12.1 h1:kBMblXk7xH5/6j3K9uk8d7/c+fzXWiUsCsPte0VMwOA=
+github.com/chromedp/chromedp v0.13.1 h1:FDh9CfaAt0w70gl69Hb69M/xgZrWuppH9AW22aGa+iU=
-github.com/chromedp/chromedp v0.12.1/go.mod h1:F6+wdq9LKFDMoyxhq46ZLz4VLXrsrCAR3sFqJz4Nqc0=
+github.com/chromedp/chromedp v0.13.1/go.mod h1:O3nO4Lno7iLoVX+7GdqQkehhKG7DtLf/zFRyJo0AhXY=
 github.com/chromedp/sysutil v1.1.0 h1:PUFNv5EcprjqXZD9nJb9b/c9ibAbxiYo4exNWZyipwM=
 github.com/chromedp/sysutil v1.1.0/go.mod h1:WiThHUdltqCNKGc4gaU50XgYjwjYIhKWoHGPTUfWTJ8=
+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
+github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/dlclark/regexp2 v1.11.4 h1:rPYF9/LECdNymJufQKmri9gV604RvvABwgOA8un7yAo=
+github.com/dlclark/regexp2 v1.11.5 h1:Q/sSnsKerHeCkc/jSTNq1oCm7KiVgUMZRDUoRu0JQZQ=
-github.com/dlclark/regexp2 v1.11.4/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
+github.com/dlclark/regexp2 v1.11.5/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
-github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5 h1:iFaUwBSo5Svw6L7HYpRu/0lE3e0BaElwnNO1qkNQxBY=
+github.com/dsnet/compress v0.0.2-0.20230904184137-39efe44ab707 h1:2tV76y6Q9BB+NEBasnqvs7e49aEBFI8ejC89PSnWH+4=
-github.com/dsnet/compress v0.0.2-0.20210315054119-f66993602bf5/go.mod h1:qssHWj60/X5sZFNxpG4HBPDHVqxNm4DfnCKgrbZOT+s=
+github.com/dsnet/compress v0.0.2-0.20230904184137-39efe44ab707/go.mod h1:qssHWj60/X5sZFNxpG4HBPDHVqxNm4DfnCKgrbZOT+s=
 github.com/dsnet/golib v0.0.0-20171103203638-1ea166775780/go.mod h1:Lj+Z9rebOhdfkVLjJ8T6VcRQv3SXugXy999NBtR9aFY=
 github.com/ebitengine/purego v0.8.2 h1:jPPGWs2sZ1UgOSgD2bClL0MJIqu58nOmIcBuXr62z1I=
 github.com/ebitengine/purego v0.8.2/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
+github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
 github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
+github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
+github.com/go-json-experiment/json v0.0.0-20250223041408-d3c622f1b874 h1:F8d1AJ6M9UQCavhwmO6ZsrYLfG8zVFWfEfMS2MXPkSY=
+github.com/go-json-experiment/json v0.0.0-20250223041408-d3c622f1b874/go.mod h1:TiCD2a1pcmjd7YnhGH0f/zKNcCD06B029pHhzV23c2M=
 github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
 github.com/go-ole/go-ole v1.3.0 h1:Dt6ye7+vXGIKZ7Xtk4s6/xVdGDQynvom7xCFEdWr6uE=
 github.com/go-ole/go-ole v1.3.0/go.mod h1:5LS6F96DhAwUc7C+1HLexzMXY1xGRSryjyPPKW6zv78=
@@ -38,32 +75,66 @@ github.com/gobwas/pool v0.2.1 h1:xfeeEhW7pwmX8nuLVlqbzVc7udMDrwetjEv+TZIz1og=
 github.com/gobwas/pool v0.2.1/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
 github.com/gobwas/ws v1.4.0 h1:CTaoG1tojrh4ucGPcoJFiAQUAsEWekEWvLy7GsVNqGs=
 github.com/gobwas/ws v1.4.0/go.mod h1:G3gNqMNtPppf5XUz7O4shetPpcZ1VJ7zt18dlUeakrc=
-github.com/golang/snappy v0.0.2/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-github.com/golang/snappy v0.0.4 h1:yAGX7huGHXlcLOEtBnF4w7FQwA26wojNCwOYAEhLjQM=
+github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
-github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
+github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
+github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
+github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
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pkg/gotenberg/debug.go

@@ -0,0 +1,68 @@
+package gotenberg
+
+import (
+	"runtime"
+	"sort"
+	"sync"
+
+	flag "github.com/spf13/pflag"
+)
+
+// DebugInfo gathers data for debugging.
+type DebugInfo struct {
+	Version               string                            `json:"version"`
+	Architecture          string                            `json:"architecture"`
+	Modules               []string                          `json:"modules"`
+	ModulesAdditionalData map[string]map[string]interface{} `json:"modules_additional_data"`
+	Flags                 map[string]interface{}            `json:"flags"`
+}
+
+// BuildDebug builds the debug data from modules.
+func BuildDebug(ctx *Context) {
+	debugMu.Lock()
+	defer debugMu.Unlock()
+
+	debug = &DebugInfo{
+		Version:               Version,
+		Architecture:          runtime.GOARCH,
+		Modules:               make([]string, len(ctx.moduleInstances)),
+		ModulesAdditionalData: make(map[string]map[string]interface{}),
+		Flags:                 make(map[string]interface{}),
+	}
+
+	i := 0
+	for ID, mod := range ctx.moduleInstances {
+		debug.Modules[i] = ID
+		i++
+
+		debuggable, ok := mod.(Debuggable)
+		if !ok {
+			continue
+		}
+
+		debug.ModulesAdditionalData[ID] = debuggable.Debug()
+	}
+
+	sort.Sort(AlphanumericSort(debug.Modules))
+
+	ctx.ParsedFlags().VisitAll(func(f *flag.Flag) {
+		debug.Flags[f.Name] = f.Value.String()
+	})
+}
+
+// Debug returns the debug data.
+func Debug() DebugInfo {
+	debugMu.Lock()
+	defer debugMu.Unlock()
+
+	if debug == nil {
+		return DebugInfo{}
+	}
+
+	return *debug
+}
+
+var (
+	debug   *DebugInfo
+	debugMu sync.Mutex
+)

pkg/gotenberg/debug_test.go

@@ -0,0 +1,72 @@
+package gotenberg
+
+import (
+	"reflect"
+	"runtime"
+	"testing"
+
+	flag "github.com/spf13/pflag"
+)
+
+func TestBuildDebug(t *testing.T) {
+	if !reflect.DeepEqual(Debug(), DebugInfo{}) {
+		t.Errorf("Debug() should return empty debug data")
+	}
+
+	fs := flag.NewFlagSet("gotenberg", flag.ExitOnError)
+	fs.String("foo", "bar", "Set foo")
+	ctx := NewContext(ParsedFlags{
+		FlagSet: fs,
+	}, func() []ModuleDescriptor {
+		mod1 := &struct {
+			ModuleMock
+		}{}
+		mod1.DescriptorMock = func() ModuleDescriptor {
+			return ModuleDescriptor{ID: "foo", New: func() Module { return mod1 }}
+		}
+		mod2 := &struct {
+			ModuleMock
+			DebuggableMock
+		}{}
+		mod2.DescriptorMock = func() ModuleDescriptor {
+			return ModuleDescriptor{ID: "bar", New: func() Module { return mod2 }}
+		}
+		mod2.DebugMock = func() map[string]interface{} {
+			return map[string]interface{}{
+				"foo": "bar",
+			}
+		}
+
+		return []ModuleDescriptor{mod1.Descriptor(), mod2.Descriptor()}
+	}())
+
+	// Load modules.
+	_, err := ctx.Modules(new(Module))
+	if err != nil {
+		t.Errorf("expected no error but got: %v", err)
+	}
+
+	// Build debug data.
+	BuildDebug(ctx)
+
+	expect := DebugInfo{
+		Version:      Version,
+		Architecture: runtime.GOARCH,
+		Modules: []string{
+			"bar",
+			"foo",
+		},
+		ModulesAdditionalData: map[string]map[string]interface{}{
+			"bar": {
+				"foo": "bar",
+			},
+		},
+		Flags: map[string]interface{}{
+			"foo": "bar",
+		},
+	}
+
+	if !reflect.DeepEqual(expect, Debug()) {
+		t.Errorf("expected '%+v', bug got '%+v'", expect, Debug())
+	}
+}

pkg/gotenberg/fs.go

@@ -3,8 +3,6 @@ package gotenberg
 import (
 	"fmt"
 	"os"
-	"path/filepath"
-	"strings"
 
 	"github.com/google/uuid"
 )
@@ -86,25 +84,6 @@ func (fs *FileSystem) MkdirAll() (string, error) {
 	return path, nil
 }
 
-// WalkDir walks through the root level of a directory and returns a list of
-// files paths that match the specified file extension.
-func WalkDir(dir, ext string) ([]string, error) {
-	var files []string
-	err := filepath.Walk(dir, func(path string, info os.FileInfo, pathErr error) error {
-		if pathErr != nil {
-			return pathErr
-		}
-		if info.IsDir() {
-			return nil
-		}
-		if strings.EqualFold(filepath.Ext(info.Name()), ext) {
-			files = append(files, path)
-		}
-		return nil
-	})
-	return files, err
-}
-
 // Interface guards.
 var (
 	_ MkdirAll   = (*OsMkdirAll)(nil)

pkg/gotenberg/fs_test.go

@@ -6,7 +6,6 @@ import (
 	"io"
 	"os"
 	"path/filepath"
-	"reflect"
 	"strings"
 	"testing"
 
@@ -145,78 +144,3 @@ func TestFileSystem_MkdirAll(t *testing.T) {
 		})
 	}
 }
-
-func TestWalkDir(t *testing.T) {
-	for _, tc := range []struct {
-		scenario    string
-		dir         string
-		ext         string
-		expectError bool
-		expectFiles []string
-	}{
-		{
-			scenario:    "directory does not exist",
-			dir:         uuid.NewString(),
-			ext:         ".pdf",
-			expectError: true,
-		},
-		{
-			scenario: "find PDF files",
-			dir: func() string {
-				path := fmt.Sprintf("%s/a_directory", os.TempDir())
-
-				err := os.MkdirAll(path, 0o755)
-				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
-				}
-
-				err = os.WriteFile(fmt.Sprintf("%s/a_foo_file.pdf", path), []byte{1}, 0o755)
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				err = os.WriteFile(fmt.Sprintf("%s/a_bar_file.PDF", path), []byte{1}, 0o755)
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				err = os.WriteFile(fmt.Sprintf("%s/a_baz_file.txt", path), []byte{1}, 0o755)
-				if err != nil {
-					t.Fatalf("expected no error but got: %v", err)
-				}
-
-				return path
-			}(),
-			ext:         ".pdf",
-			expectError: false,
-			expectFiles: []string{"/tmp/a_directory/a_bar_file.PDF", "/tmp/a_directory/a_foo_file.pdf"},
-		},
-	} {
-		t.Run(tc.scenario, func(t *testing.T) {
-			defer func() {
-				err := os.RemoveAll(tc.dir)
-				if err != nil {
-					t.Fatalf("expected no error while cleaning up but got: %v", err)
-				}
-			}()
-
-			files, err := WalkDir(tc.dir, tc.ext)
-
-			if !tc.expectError && err != nil {
-				t.Fatalf("expected no error but got: %v", err)
-			}
-
-			if tc.expectError && err == nil {
-				t.Fatal("expected error but got none")
-			}
-
-			if tc.expectError && err != nil {
-				return
-			}
-
-			if !reflect.DeepEqual(files, tc.expectFiles) {
-				t.Errorf("expected files %+v, but got %+v", tc.expectFiles, files)
-			}
-		})
-	}
-}

pkg/gotenberg/gc_test.go

@@ -31,7 +31,7 @@ func TestGarbageCollect(t *testing.T) {
 
 				err := os.MkdirAll(path, 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/a_foo_file", path), []byte{1}, 0o755)

pkg/gotenberg/mocks.go

@@ -34,6 +34,14 @@ func (mod *ValidatorMock) Validate() error {
 	return mod.ValidateMock()
 }
 
+type DebuggableMock struct {
+	DebugMock func() map[string]interface{}
+}
+
+func (mod *DebuggableMock) Debug() map[string]interface{} {
+	return mod.DebugMock()
+}
+
 // PdfEngineMock is a mock for the [PdfEngine] interface.
 //
 //nolint:dupl

pkg/gotenberg/mocks_test.go

@@ -48,6 +48,21 @@ func TestValidatorMock(t *testing.T) {
 	}
 }
 
+func TestDebuggableMock(t *testing.T) {
+	mock := &DebuggableMock{
+		DebugMock: func() map[string]interface{} {
+			return map[string]interface{}{
+				"foo": "bar",
+			}
+		},
+	}
+
+	d := mock.Debug()
+	if d == nil {
+		t.Errorf("expected debug data, but got nil")
+	}
+}
+
 func TestPDFEngineMock(t *testing.T) {
 	mock := &PdfEngineMock{
 		MergeMock: func(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {

pkg/gotenberg/modules.go

@@ -75,6 +75,12 @@ type SystemLogger interface {
 	SystemMessages() []string
 }
 
+// Debuggable is a module interface for modules which want to provide
+// additional debug data.
+type Debuggable interface {
+	Debug() map[string]interface{}
+}
+
 // MustRegisterModule registers a module.
 //
 // To register a module, create an init() method in the module main go file:

pkg/gotenberg/sort.go

@@ -7,7 +7,8 @@ import (
 )
 
 // AlphanumericSort implements sort.Interface and helps to sort strings
-// alphanumerically.
+// alphanumerically by either a numeric prefix or, if missing, a numeric
+// suffix.
 //
 // See: https://github.com/gotenberg/gotenberg/issues/805.
 type AlphanumericSort []string
@@ -21,20 +22,20 @@ func (s AlphanumericSort) Swap(i, j int) {
 }
 
 func (s AlphanumericSort) Less(i, j int) bool {
-	numI, restI := extractPrefix(s[i])
+	numI, restI := extractNumber(s[i])
-	numJ, restJ := extractPrefix(s[j])
+	numJ, restJ := extractNumber(s[j])
 
-	// Compares numerical prefixes if they exist.
+	// If both strings contain a number, compare them numerically.
 	if numI != -1 && numJ != -1 {
 		if numI != numJ {
 			return numI < numJ
 		}
-		// If numbers are equal, falls back to string comparison of the rest.
+		// If the numbers are equal, compare the "rest" strings.
 		return restI < restJ
 	}
 
-	// If one has a numerical prefix and the other doesn't, the one with the
+	// If one contains a number and the other doesn't, the one with the number
-	// number comes first.
+	// comes first.
 	if numI != -1 {
 		return true
 	}
@@ -42,28 +43,52 @@ func (s AlphanumericSort) Less(i, j int) bool {
 		return false
 	}
 
-	// If neither has a numerical prefix, compare as strings
+	// Neither has a number; fall back to lexicographical order.
 	return s[i] < s[j]
 }
 
-// extractPrefix attempts to extract a numerical prefix and the rest of the filename
+// extractNumber attempts to extract a numeric portion from the filename.
-func extractPrefix(filename string) (int, string) {
+// It first checks for a numeric prefix (digits at the beginning).
-	matches := numPrefixRegexp.FindStringSubmatch(filename)
+// If none is found, it next attempts to match a number immediately before the
-	if len(matches) > 2 {
+// extension (for filenames such as "sample1_1.pdf").
-		prefix, err := strconv.Atoi(matches[1])
+// If that fails, it then attempts a trailing numeric pattern.
-		if err == nil {
+// If no number is found, it returns -1 and the original string.
-			return prefix, matches[2]
+func extractNumber(str string) (int, string) {
+	// Check for a numeric prefix.
+	if matches := prefixRegexp.FindStringSubmatch(str); len(matches) > 2 {
+		if num, err := strconv.Atoi(matches[1]); err == nil {
+			return num, matches[2]
 		}
 	}
 
-	// Returns -1 if no numerical prefix is found, indicating to just compare
+	// Check for a number immediately before an extension.
-	// as strings.
+	if matches := extensionSuffixRegexp.FindStringSubmatch(str); len(matches) > 3 {
-	return -1, filename
+		if num, err := strconv.Atoi(matches[2]); err == nil {
+			// Remove the numeric block but keep the extension.
+			return num, matches[1] + matches[3]
+		}
+	}
+
+	// Check for a trailing number (with no extension following).
+	if matches := suffixRegexp.FindStringSubmatch(str); len(matches) > 2 {
+		if num, err := strconv.Atoi(matches[2]); err == nil {
+			return num, matches[1]
+		}
+	}
+
+	// No numeric portion found.
+	return -1, str
 }
 
-var numPrefixRegexp = regexp.MustCompile(`^(\d+)(.*)$`)
+// Regular expressions used by extractNumber.
+var (
+	// Matches a numeric prefix: one or more digits at the start.
+	prefixRegexp = regexp.MustCompile(`^(\d+)(.*)$`)
+	// Matches a numeric block immediately before a file extension.
+	extensionSuffixRegexp = regexp.MustCompile(`^(.*?)(\d+)(\.[^.]+)$`)
+	// Matches a trailing numeric sequence when there is no extension.
+	suffixRegexp = regexp.MustCompile(`^(.*?)(\d+)$`)
+)
 
 // Interface guard.
-var (
+var _ sort.Interface = (*AlphanumericSort)(nil)
-	_ sort.Interface = (*AlphanumericSort)(nil)
-)

pkg/gotenberg/sort_test.go

@@ -17,6 +17,16 @@ func TestAlphanumericSort(t *testing.T) {
 			values:       []string{"10qux.pdf", "2_baz.txt", "2_aza.txt", "1bar.pdf", "Afoo.txt", "Bbar.docx", "25zeta.txt", "3.pdf", "4_foo.pdf"},
 			expectedSort: []string{"1bar.pdf", "2_aza.txt", "2_baz.txt", "3.pdf", "4_foo.pdf", "10qux.pdf", "25zeta.txt", "Afoo.txt", "Bbar.docx"},
 		},
+		{
+			scenario:     "numeric suffixes with extensions",
+			values:       []string{"sample1_10.pdf", "sample1_11.pdf", "sample1_4.pdf", "sample1_3.pdf", "sample1_1.pdf", "sample1_2.pdf"},
+			expectedSort: []string{"sample1_1.pdf", "sample1_2.pdf", "sample1_3.pdf", "sample1_4.pdf", "sample1_10.pdf", "sample1_11.pdf"},
+		},
+		{
+			scenario:     "numeric suffixes",
+			values:       []string{"sample1_10", "sample1_11", "sample1_4", "sample1_3", "sample1_1", "sample1_2"},
+			expectedSort: []string{"sample1_1", "sample1_2", "sample1_3", "sample1_4", "sample1_10", "sample1_11"},
+		},
 		{
 			scenario:     "hrtime (PHP library)",
 			values:       []string{"245654773395259", "245654773395039", "245654773395149", "245654773394919", "245654773394369"},

pkg/modules/api/api.go

@@ -42,6 +42,7 @@ type Api struct {
 	basicAuthPassword         string
 	downloadFromCfg           downloadFromConfig
 	disableHealthCheckLogging bool
+	enableDebugRoute          bool
 
 	routes              []Route
 	externalMiddlewares []Middleware
@@ -187,6 +188,7 @@ func (a *Api) Descriptor() gotenberg.ModuleDescriptor {
 			fs.Int("api-download-from-max-retry", 4, "Set the maximum number of retries for the download from feature")
 			fs.Bool("api-disable-download-from", false, "Disable the download from feature")
 			fs.Bool("api-disable-health-check-logging", false, "Disable health check logging")
+			fs.Bool("api-enable-debug-route", false, "Enable the debug route")
 			return fs
 		}(),
 		New: func() gotenberg.Module { return new(Api) },
@@ -212,6 +214,7 @@ func (a *Api) Provision(ctx *gotenberg.Context) error {
 		disable:   flags.MustBool("api-disable-download-from"),
 	}
 	a.disableHealthCheckLogging = flags.MustBool("api-disable-health-check-logging")
+	a.enableDebugRoute = flags.MustBool("api-enable-debug-route")
 
 	// Port from env?
 	portEnvVar := flags.MustString("api-port-from-env")
@@ -365,9 +368,10 @@ func (a *Api) Validate() error {
 		return err
 	}
 
-	routesMap := make(map[string]string, len(a.routes)+2)
+	routesMap := make(map[string]string, len(a.routes)+3)
 	routesMap["/health"] = "/health"
 	routesMap["/version"] = "/version"
+	routesMap["/debug"] = "/debug"
 
 	for _, route := range a.routes {
 		if route.Path == "" {
@@ -529,7 +533,7 @@ func (a *Api) Start() error {
 		hardTimeoutMiddleware(hardTimeout),
 	)
 
-	// ...and the version route.
+	// ...the version route.
 	a.srv.GET(
 		fmt.Sprintf("%s%s", a.rootPath, "version"),
 		func(c echo.Context) error {
@@ -538,6 +542,17 @@ func (a *Api) Start() error {
 		securityMiddleware,
 	)
 
+	// ...and the debug route.
+	if a.enableDebugRoute {
+		a.srv.GET(
+			fmt.Sprintf("%s%s", a.rootPath, "debug"),
+			func(c echo.Context) error {
+				return c.JSONPretty(http.StatusOK, gotenberg.Debug(), "  ")
+			},
+			securityMiddleware,
+		)
+	}
+
 	// Wait for all modules to be ready.
 	ctx, cancel := context.WithTimeout(context.Background(), a.startTimeout)
 	defer cancel()

pkg/modules/api/api_test.go

@@ -786,6 +786,7 @@ func TestApi_Start(t *testing.T) {
 			mod.basicAuthUsername = "foo"
 			mod.basicAuthPassword = "bar"
 			mod.disableHealthCheckLogging = true
+			mod.enableDebugRoute = true
 			mod.routes = []Route{
 				{
 					Method:         http.MethodPost,
@@ -908,6 +909,15 @@ func TestApi_Start(t *testing.T) {
 				t.Errorf("expected %d status code but got %d", http.StatusOK, recorder.Code)
 			}
 
+			// debug request.
+			recorder = httptest.NewRecorder()
+			debugRequest := httptest.NewRequest(http.MethodGet, "/debug", nil)
+			debugRequest.SetBasicAuth(mod.basicAuthUsername, mod.basicAuthPassword)
+			mod.srv.ServeHTTP(recorder, debugRequest)
+			if recorder.Code != http.StatusOK {
+				t.Errorf("expected %d status code but got %d", http.StatusOK, recorder.Code)
+			}
+
 			// "multipart/form-data" request.
 			multipartRequest := func(url string) *http.Request {
 				body := &bytes.Buffer{}

pkg/modules/api/context.go

@@ -1,7 +1,6 @@
 package api
 
 import (
-	"compress/flate"
 	"context"
 	"encoding/json"
 	"errors"
@@ -19,7 +18,7 @@ import (
 	"github.com/google/uuid"
 	"github.com/hashicorp/go-retryablehttp"
 	"github.com/labstack/echo/v4"
-	"github.com/mholt/archiver/v3"
+	"github.com/mholt/archives"
 	"go.uber.org/zap"
 	"golang.org/x/sync/errgroup"
 	"golang.org/x/text/unicode/norm"
@@ -468,22 +467,33 @@ func (ctx *Context) BuildOutputFile() (string, error) {
 
 	if len(ctx.outputPaths) == 1 {
 		ctx.logger.Debug(fmt.Sprintf("only one output file '%s', skip archive creation", ctx.outputPaths[0]))
-
 		return ctx.outputPaths[0], nil
 	}
 
-	z := archiver.Zip{
+	filesInfo, err := archives.FilesFromDisk(ctx.Context, nil, func() map[string]string {
-		CompressionLevel:       flate.DefaultCompression,
+		f := make(map[string]string)
-		MkdirAll:               true,
+		for _, outputPath := range ctx.outputPaths {
-		SelectiveCompression:   true,
+			f[outputPath] = ""
-		ContinueOnError:        false,
+		}
-		OverwriteExisting:      false,
+		return f
-		ImplicitTopLevelFolder: false,
+	}())
+	if err != nil {
+		return "", fmt.Errorf("create files info: %w", err)
 	}
 
 	archivePath := ctx.GeneratePath(".zip")
+	out, err := os.Create(archivePath)
+	if err != nil {
+		return "", fmt.Errorf("create zip file: %w", err)
+	}
+	defer func(out *os.File) {
+		err := out.Close()
+		if err != nil {
+			ctx.logger.Error(fmt.Sprintf("close zip file: %s", err))
+		}
+	}(out)
 
-	err := z.Archive(ctx.outputPaths, archivePath)
+	err = archives.Zip{}.Archive(ctx.Context, out, filesInfo)
 	if err != nil {
 		return "", fmt.Errorf("archive output files: %w", err)
 	}

pkg/modules/api/context_test.go

@@ -783,6 +783,7 @@ func TestContext_BuildOutputFile(t *testing.T) {
 			}()
 
 			tc.ctx.dirPath = dirPath
+			tc.ctx.Context = context.Background()
 			tc.ctx.logger = zap.NewNop()
 
 			_, err = tc.ctx.BuildOutputFile()

pkg/modules/chromium/browser_test.go

@@ -329,7 +329,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<iframe src='file:///etc/passwd'></iframe>"), 0o755)
@@ -361,7 +361,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<iframe src='file:///etc/passwd'></iframe>"), 0o755)
@@ -393,7 +393,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Skip networkIdle event</h1>"), 0o755)
@@ -428,7 +428,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>ErrInvalidHttpStatusCode</h1>"), 0o755)
@@ -461,7 +461,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/style.css", fs.WorkingDirPath()), []byte("body{font-family: Arial, Helvetica, sans-serif;}"), 0o755)
@@ -499,7 +499,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<script type=\"application/javascript\">throw new Error(\"Exception\")</script>"), 0o755)
@@ -532,7 +532,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				return fs
@@ -558,7 +558,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<html><head><link rel=\"stylesheet\" type=\"text/css\" href=\"http://localhost:100/style.css\"></head><body><h1>ErrResourceLoadingFailed</h1></body></html>"), 0o755)
@@ -592,7 +592,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Clear cache</h1>"), 0o755)
@@ -625,7 +625,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Clear cookies</h1>"), 0o755)
@@ -658,7 +658,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<script type=\"application/javascript\">throw new Error(\"Exception\")</script>"), 0o755)
@@ -692,7 +692,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Set cookies</h1>"), 0o755)
@@ -727,7 +727,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>User-Agent override</h1>"), 0o755)
@@ -762,7 +762,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Extra HTTP headers</h1>"), 0o755)
@@ -816,7 +816,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>ErrOmitBackgroundWithoutPrintBackground</h1>"), 0o755)
@@ -849,7 +849,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Hide default white background</h1>"), 0o755)
@@ -885,7 +885,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>ErrInvalidEmulatedMediaType</h1>"), 0o755)
@@ -918,7 +918,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<style>@media print { #screen { display: none } }</style><p id=\"screen\">Screen media type</p>"), 0o755)
@@ -953,7 +953,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<script type=\"application/javascript\">await new Promise(r => setTimeout(r, 10000));</script>"), 0o755)
@@ -988,7 +988,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<script type=\"application/javascript\">await new Promise(r => setTimeout(r, 10000));</script>"), 0o755)
@@ -1023,7 +1023,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				html := `
@@ -1069,7 +1069,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>ErrInvalidEvaluationExpression</h1>"), 0o755)
@@ -1104,7 +1104,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				html := `
@@ -1150,7 +1150,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Custom header and footer</h1>"), 0o755)
@@ -1185,7 +1185,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Custom header and footer</h1>"), 0o755)
@@ -1221,7 +1221,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>ErrInvalidPrinterSettings</h1>"), 0o755)
@@ -1259,7 +1259,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>ErrPageRangesSyntaxError</h1>"), 0o755)
@@ -1292,7 +1292,7 @@ func TestChromiumBrowser_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Default options</h1>"), 0o755)
@@ -1491,7 +1491,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<iframe src='file:///etc/passwd'></iframe>"), 0o755)
@@ -1523,7 +1523,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<iframe src='file:///etc/passwd'></iframe>"), 0o755)
@@ -1555,7 +1555,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Skip networkIdle event</h1>"), 0o755)
@@ -1590,7 +1590,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>ErrInvalidHttpStatusCode</h1>"), 0o755)
@@ -1623,7 +1623,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/style.css", fs.WorkingDirPath()), []byte("body{font-family: Arial, Helvetica, sans-serif;}"), 0o755)
@@ -1661,7 +1661,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<script type=\"application/javascript\">throw new Error(\"Exception\")</script>"), 0o755)
@@ -1694,7 +1694,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				return fs
@@ -1720,7 +1720,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<html><head><link rel=\"stylesheet\" type=\"text/css\" href=\"http://localhost:100/style.css\"></head><body><h1>ErrResourceLoadingFailed</h1></body></html>"), 0o755)
@@ -1754,7 +1754,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Clear cache</h1>"), 0o755)
@@ -1787,7 +1787,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Clear cookies</h1>"), 0o755)
@@ -1820,7 +1820,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<script type=\"application/javascript\">throw new Error(\"Exception\")</script>"), 0o755)
@@ -1854,7 +1854,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Set cookies</h1>"), 0o755)
@@ -1889,7 +1889,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>User-Agent override</h1>"), 0o755)
@@ -1924,7 +1924,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Extra HTTP headers</h1>"), 0o755)
@@ -1978,7 +1978,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>ErrOmitBackgroundWithoutPrintBackground</h1>"), 0o755)
@@ -2013,7 +2013,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>ErrInvalidEmulatedMediaType</h1>"), 0o755)
@@ -2046,7 +2046,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<style>@media print { #screen { display: none } }</style><p id=\"screen\">Screen media type</p>"), 0o755)
@@ -2081,7 +2081,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<script type=\"application/javascript\">await new Promise(r => setTimeout(r, 10000));</script>"), 0o755)
@@ -2116,7 +2116,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<script type=\"application/javascript\">await new Promise(r => setTimeout(r, 10000));</script>"), 0o755)
@@ -2151,7 +2151,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				html := `
@@ -2197,7 +2197,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>ErrInvalidEvaluationExpression</h1>"), 0o755)
@@ -2232,7 +2232,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				html := `
@@ -2278,7 +2278,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Default options</h1>"), 0o755)
@@ -2321,7 +2321,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Default options</h1>"), 0o755)
@@ -2369,7 +2369,7 @@ func TestChromiumBrowser_screenshot(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", fs.WorkingDirPath()), []byte("<h1>Default options</h1>"), 0o755)

pkg/modules/chromium/chromium.go

@@ -5,6 +5,9 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"os/exec"
+	"strings"
+	"syscall"
 	"time"
 
 	"github.com/alexliesenfeld/health"
@@ -484,6 +487,23 @@ func (mod *Chromium) Stop(ctx context.Context) error {
 	return fmt.Errorf("stop Chromium: %w", err)
 }
 
+// Debug returns additional debug data.
+func (mod *Chromium) Debug() map[string]interface{} {
+	debug := make(map[string]interface{})
+
+	cmd := exec.Command(mod.args.binPath, "--version") //nolint:gosec
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+
+	output, err := cmd.Output()
+	if err != nil {
+		debug["version"] = err.Error()
+		return debug
+	}
+
+	debug["version"] = strings.TrimSpace(string(output))
+	return debug
+}
+
 // Metrics returns the metrics.
 func (mod *Chromium) Metrics() ([]gotenberg.Metric, error) {
 	return []gotenberg.Metric{
@@ -593,6 +613,7 @@ var (
 	_ gotenberg.Provisioner     = (*Chromium)(nil)
 	_ gotenberg.Validator       = (*Chromium)(nil)
 	_ gotenberg.App             = (*Chromium)(nil)
+	_ gotenberg.Debuggable      = (*Chromium)(nil)
 	_ gotenberg.MetricsProvider = (*Chromium)(nil)
 	_ api.HealthChecker         = (*Chromium)(nil)
 	_ api.Router                = (*Chromium)(nil)

pkg/modules/chromium/chromium_test.go

@@ -336,6 +336,54 @@ func TestChromium_Stop(t *testing.T) {
 	}
 }
 
+func TestChromium_Debug(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		mod         *Chromium
+		expect      map[string]interface{}
+		doNotExpect map[string]interface{}
+	}{
+		{
+			scenario: "cannot determine version",
+			mod: &Chromium{
+				args: browserArguments{
+					binPath: "foo",
+				},
+			},
+			expect: map[string]interface{}{
+				"version": `exec: "foo": executable file not found in $PATH`,
+			},
+		},
+		{
+			scenario: "success",
+			mod: &Chromium{
+				args: browserArguments{
+					binPath: "echo",
+				},
+			},
+			doNotExpect: map[string]interface{}{
+				"version": `exec: "echo": executable file not found in $PATH`,
+			},
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			d := tc.mod.Debug()
+
+			if tc.expect != nil {
+				if !reflect.DeepEqual(d, tc.expect) {
+					t.Errorf("expected '%v' but got '%v'", tc.expect, d)
+				}
+			}
+
+			if tc.doNotExpect != nil {
+				if reflect.DeepEqual(d, tc.doNotExpect) {
+					t.Errorf("did not expect '%v'", d)
+				}
+			}
+		})
+	}
+}
+
 func TestChromium_Metrics(t *testing.T) {
 	mod := new(Chromium)
 	mod.supervisor = &gotenberg.ProcessSupervisorMock{

pkg/modules/chromium/routes_test.go

@@ -1052,7 +1052,7 @@ func TestConvertMarkdownRoute(t *testing.T) {
 
 				err := os.MkdirAll(dirPath, 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", dirPath), []byte("<div>{{ toHTML \"markdown.md\" }}</div>"), 0o755)
@@ -1080,7 +1080,7 @@ func TestConvertMarkdownRoute(t *testing.T) {
 
 				err := os.MkdirAll(dirPath, 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", dirPath), []byte("<div>{{ toHTML \"markdown.md\" }}</div>"), 0o755)
@@ -1107,7 +1107,7 @@ func TestConvertMarkdownRoute(t *testing.T) {
 
 				err := os.MkdirAll(dirPath, 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", dirPath), []byte("<div>{{ toHTML \"markdown.md\" }}</div>"), 0o755)
@@ -1142,7 +1142,7 @@ func TestConvertMarkdownRoute(t *testing.T) {
 
 				err := os.MkdirAll(dirPath, 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", dirPath), []byte("<div>{{ toHTML \"markdown.md\" }}</div>"), 0o755)
@@ -1259,7 +1259,7 @@ func TestScreenshotMarkdownRoute(t *testing.T) {
 
 				err := os.MkdirAll(dirPath, 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", dirPath), []byte("<div>{{ toHTML \"markdown.md\" }}</div>"), 0o755)
@@ -1287,7 +1287,7 @@ func TestScreenshotMarkdownRoute(t *testing.T) {
 
 				err := os.MkdirAll(dirPath, 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", dirPath), []byte("<div>{{ toHTML \"markdown.md\" }}</div>"), 0o755)
@@ -1314,7 +1314,7 @@ func TestScreenshotMarkdownRoute(t *testing.T) {
 
 				err := os.MkdirAll(dirPath, 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", dirPath), []byte("<div>{{ toHTML \"markdown.md\" }}</div>"), 0o755)
@@ -1349,7 +1349,7 @@ func TestScreenshotMarkdownRoute(t *testing.T) {
 
 				err := os.MkdirAll(dirPath, 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/index.html", dirPath), []byte("<div>{{ toHTML \"markdown.md\" }}</div>"), 0o755)

pkg/modules/exiftool/exiftool.go

@@ -5,7 +5,10 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"os/exec"
 	"reflect"
+	"strings"
+	"syscall"
 
 	"github.com/barasher/go-exiftool"
 	"go.uber.org/zap"
@@ -53,6 +56,23 @@ func (engine *ExifTool) Validate() error {
 	return nil
 }
 
+// Debug returns additional debug data.
+func (engine *ExifTool) Debug() map[string]interface{} {
+	debug := make(map[string]interface{})
+
+	cmd := exec.Command(engine.binPath, "-ver") //nolint:gosec
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+
+	output, err := cmd.Output()
+	if err != nil {
+		debug["version"] = err.Error()
+		return debug
+	}
+
+	debug["version"] = strings.TrimSpace(string(output))
+	return debug
+}
+
 // Merge is not available in this implementation.
 func (engine *ExifTool) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
 	return fmt.Errorf("merge PDFs with ExifTool: %w", gotenberg.ErrPdfEngineMethodNotSupported)
@@ -161,5 +181,6 @@ var (
 	_ gotenberg.Module      = (*ExifTool)(nil)
 	_ gotenberg.Provisioner = (*ExifTool)(nil)
 	_ gotenberg.Validator   = (*ExifTool)(nil)
+	_ gotenberg.Debuggable  = (*ExifTool)(nil)
 	_ gotenberg.PdfEngine   = (*ExifTool)(nil)
 )

pkg/modules/exiftool/exiftool_test.go

@@ -73,6 +73,50 @@ func TestExifTool_Validate(t *testing.T) {
 	}
 }
 
+func TestExifTool_Debug(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		engine      *ExifTool
+		expect      map[string]interface{}
+		doNotExpect map[string]interface{}
+	}{
+		{
+			scenario: "cannot determine version",
+			engine: &ExifTool{
+				binPath: "foo",
+			},
+			expect: map[string]interface{}{
+				"version": `exec: "foo": executable file not found in $PATH`,
+			},
+		},
+		{
+			scenario: "success",
+			engine: &ExifTool{
+				binPath: "echo",
+			},
+			doNotExpect: map[string]interface{}{
+				"version": `exec: "echo": executable file not found in $PATH`,
+			},
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			d := tc.engine.Debug()
+
+			if tc.expect != nil {
+				if !reflect.DeepEqual(d, tc.expect) {
+					t.Errorf("expected '%v' but got '%v'", tc.expect, d)
+				}
+			}
+
+			if tc.doNotExpect != nil {
+				if reflect.DeepEqual(d, tc.doNotExpect) {
+					t.Errorf("did not expect '%v'", d)
+				}
+			}
+		})
+	}
+}
+
 func TestExiftool_Merge(t *testing.T) {
 	engine := new(ExifTool)
 	err := engine.Merge(context.Background(), zap.NewNop(), nil, "")

pkg/modules/libreoffice/api/api.go

@@ -5,6 +5,9 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"os/exec"
+	"strings"
+	"syscall"
 	"time"
 
 	"github.com/alexliesenfeld/health"
@@ -59,6 +62,10 @@ type Options struct {
 	// PageRanges allows to select the pages to convert.
 	PageRanges string
 
+	// UpdateIndexes specifies whether to update the indexes before conversion
+	// or not, with the risk of disabling links in documents.
+	UpdateIndexes bool
+
 	// ExportFormFields specifies whether form fields are exported as widgets
 	// or only their fixed print representation is exported.
 	ExportFormFields bool
@@ -149,6 +156,7 @@ func DefaultOptions() Options {
 		Password:                        "",
 		Landscape:                       false,
 		PageRanges:                      "",
+		UpdateIndexes:                   true,
 		ExportFormFields:                true,
 		AllowDuplicateFieldNames:        false,
 		ExportBookmarks:                 true,
@@ -305,6 +313,23 @@ func (a *Api) Stop(ctx context.Context) error {
 	return fmt.Errorf("stop LibreOffice: %w", err)
 }
 
+// Debug returns additional debug data.
+func (a *Api) Debug() map[string]interface{} {
+	debug := make(map[string]interface{})
+
+	cmd := exec.Command(a.args.binPath, "--version") //nolint:gosec
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+
+	output, err := cmd.Output()
+	if err != nil {
+		debug["version"] = err.Error()
+		return debug
+	}
+
+	debug["version"] = strings.TrimSpace(string(output))
+	return debug
+}
+
 // Metrics returns the metrics.
 func (a *Api) Metrics() ([]gotenberg.Metric, error) {
 	return []gotenberg.Metric{
@@ -536,6 +561,7 @@ var (
 	_ gotenberg.Provisioner     = (*Api)(nil)
 	_ gotenberg.Validator       = (*Api)(nil)
 	_ gotenberg.App             = (*Api)(nil)
+	_ gotenberg.Debuggable      = (*Api)(nil)
 	_ gotenberg.MetricsProvider = (*Api)(nil)
 	_ api.HealthChecker         = (*Api)(nil)
 	_ Uno                       = (*Api)(nil)

pkg/modules/libreoffice/api/api_test.go

@@ -277,6 +277,54 @@ func TestApi_Stop(t *testing.T) {
 	}
 }
 
+func TestPdfTk_Debug(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		a           *Api
+		expect      map[string]interface{}
+		doNotExpect map[string]interface{}
+	}{
+		{
+			scenario: "cannot determine version",
+			a: &Api{
+				args: libreOfficeArguments{
+					binPath: "foo",
+				},
+			},
+			expect: map[string]interface{}{
+				"version": `exec: "foo": executable file not found in $PATH`,
+			},
+		},
+		{
+			scenario: "success",
+			a: &Api{
+				args: libreOfficeArguments{
+					binPath: "echo",
+				},
+			},
+			doNotExpect: map[string]interface{}{
+				"version": `exec: "echo": executable file not found in $PATH`,
+			},
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			d := tc.a.Debug()
+
+			if tc.expect != nil {
+				if !reflect.DeepEqual(d, tc.expect) {
+					t.Errorf("expected '%v' but got '%v'", tc.expect, d)
+				}
+			}
+
+			if tc.doNotExpect != nil {
+				if reflect.DeepEqual(d, tc.doNotExpect) {
+					t.Errorf("did not expect '%v'", d)
+				}
+			}
+		})
+	}
+}
+
 func TestApi_Metrics(t *testing.T) {
 	a := new(Api)
 	a.supervisor = &gotenberg.ProcessSupervisorMock{

pkg/modules/libreoffice/api/libreoffice.go

@@ -279,6 +279,10 @@ func (p *libreOfficeProcess) pdf(ctx context.Context, logger *zap.Logger, inputP
 		args = append(args, "--export", fmt.Sprintf("PageRange=%s", options.PageRanges))
 	}
 
+	if !options.UpdateIndexes {
+		args = append(args, "--disable-update-indexes")
+	}
+
 	args = append(args, "--export", fmt.Sprintf("ExportFormFields=%t", options.ExportFormFields))
 	args = append(args, "--export", fmt.Sprintf("AllowDuplicateFieldNames=%t", options.AllowDuplicateFieldNames))
 	args = append(args, "--export", fmt.Sprintf("ExportBookmarks=%t", options.ExportBookmarks))

pkg/modules/libreoffice/api/libreoffice_test.go

@@ -265,7 +265,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Context done"), 0o755)
@@ -295,36 +295,36 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				in, err := os.Open("/tests/test/testdata/libreoffice/protected.docx")
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				defer func() {
 					err := in.Close()
 					if err != nil {
-						t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+						t.Fatalf("expected no error but got: %v", err)
 					}
 				}()
 
 				out, err := os.Create(fmt.Sprintf("%s/protected.docx", fs.WorkingDirPath()))
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				defer func() {
 					err := out.Close()
 					if err != nil {
-						t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+						t.Fatalf("expected no error but got: %v", err)
 					}
 				}()
 
 				_, err = io.Copy(out, in)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				return fs
@@ -348,7 +348,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Context done"), 0o755)
@@ -376,7 +376,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Success"), 0o755)
@@ -404,7 +404,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Success"), 0o755)
@@ -456,7 +456,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Landscape"), 0o755)
@@ -485,7 +485,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Landscape"), 0o755)
@@ -514,7 +514,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Landscape"), 0o755)
@@ -543,7 +543,7 @@ func TestLibreOfficeProcess_pdf(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Landscape"), 0o755)
@@ -629,7 +629,7 @@ func TestNonBasicLatinCharactersGuard(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/document.txt", fs.WorkingDirPath()), []byte("Basic latin characters"), 0o755)
@@ -650,7 +650,7 @@ func TestNonBasicLatinCharactersGuard(t *testing.T) {
 
 				err := os.MkdirAll(fs.WorkingDirPath(), 0o755)
 				if err != nil {
-					t.Fatalf(fmt.Sprintf("expected no error but got: %v", err))
+					t.Fatalf("expected no error but got: %v", err)
 				}
 
 				err = os.WriteFile(fmt.Sprintf("%s/éèßàùä.txt", fs.WorkingDirPath()), []byte("Non-basic latin characters"), 0o755)

pkg/modules/libreoffice/routes.go

@@ -39,6 +39,7 @@ func convertRoute(libreOffice libreofficeapi.Uno, engine gotenberg.PdfEngine) ap
 				password                        string
 				landscape                       bool
 				nativePageRanges                string
+				updateIndexes                   bool
 				exportFormFields                bool
 				allowDuplicateFieldNames        bool
 				exportBookmarks                 bool
@@ -68,6 +69,7 @@ func convertRoute(libreOffice libreofficeapi.Uno, engine gotenberg.PdfEngine) ap
 				String("password", &password, defaultOptions.Password).
 				Bool("landscape", &landscape, defaultOptions.Landscape).
 				String("nativePageRanges", &nativePageRanges, defaultOptions.PageRanges).
+				Bool("updateIndexes", &updateIndexes, defaultOptions.UpdateIndexes).
 				Bool("exportFormFields", &exportFormFields, defaultOptions.ExportFormFields).
 				Bool("allowDuplicateFieldNames", &allowDuplicateFieldNames, defaultOptions.AllowDuplicateFieldNames).
 				Bool("exportBookmarks", &exportBookmarks, defaultOptions.ExportBookmarks).
@@ -149,6 +151,7 @@ func convertRoute(libreOffice libreofficeapi.Uno, engine gotenberg.PdfEngine) ap
 					Password:                        password,
 					Landscape:                       landscape,
 					PageRanges:                      nativePageRanges,
+					UpdateIndexes:                   updateIndexes,
 					ExportFormFields:                exportFormFields,
 					AllowDuplicateFieldNames:        allowDuplicateFieldNames,
 					ExportBookmarks:                 exportBookmarks,

pkg/modules/logging/color.go

@@ -0,0 +1,49 @@
+package logging
+
+import (
+	"fmt"
+
+	"go.uber.org/zap/zapcore"
+)
+
+// Foreground colors.
+// Copy pasted from go.uber.org/zap/internal/color/color.go
+const (
+	black color = iota + 30
+	red
+	green
+	yellow
+	blue
+	magenta
+	cyan
+	white
+)
+
+type color uint8
+
+func (c color) Add(s string) string {
+	return fmt.Sprintf("\x1b[%dm%s\x1b[0m", uint8(c), s)
+}
+
+func levelToColor(l zapcore.Level) color {
+	switch l {
+	case zapcore.DebugLevel:
+		return cyan
+	case zapcore.InfoLevel:
+		return blue
+	case zapcore.WarnLevel:
+		return yellow
+	case zapcore.ErrorLevel:
+		return red
+	case zapcore.DPanicLevel:
+		return red
+	case zapcore.PanicLevel:
+		return red
+	case zapcore.FatalLevel:
+		return red
+	case zapcore.InvalidLevel:
+		return red
+	default:
+		return red
+	}
+}

pkg/modules/logging/gcp.go

@@ -0,0 +1,36 @@
+package logging
+
+import "go.uber.org/zap/zapcore"
+
+func gcpSeverity(l zapcore.Level) string {
+	switch l {
+	case zapcore.DebugLevel:
+		return "DEBUG"
+	case zapcore.InfoLevel:
+		return "INFO"
+	case zapcore.WarnLevel:
+		return "WARNING"
+	case zapcore.ErrorLevel:
+		return "ERROR"
+	case zapcore.DPanicLevel:
+		return "CRITICAL"
+	case zapcore.PanicLevel:
+		return "ALERT"
+	case zapcore.FatalLevel:
+		return "EMERGENCY"
+	case zapcore.InvalidLevel:
+		return "DEFAULT"
+	default:
+		return "DEFAULT"
+	}
+}
+
+func gcpSeverityEncoder(l zapcore.Level, enc zapcore.PrimitiveArrayEncoder) {
+	enc.AppendString(gcpSeverity(l))
+}
+
+func gcpSeverityColorEncoder(l zapcore.Level, enc zapcore.PrimitiveArrayEncoder) {
+	severity := gcpSeverity(l)
+	c := levelToColor(l)
+	enc.AppendString(c.Add(severity))
+}

pkg/modules/logging/logging.go

@@ -34,9 +34,10 @@ const (
 // Logging is a module which implements the [gotenberg.LoggerProvider]
 // interface.
 type Logging struct {
-	level        string
+	level             string
-	format       string
+	format            string
-	fieldsPrefix string
+	fieldsPrefix      string
+	enableGcpSeverity bool
 }
 
 // Descriptor returns a [Logging]'s module descriptor.
@@ -48,6 +49,7 @@ func (log *Logging) Descriptor() gotenberg.ModuleDescriptor {
 			fs.String("log-level", infoLoggingLevel, fmt.Sprintf("Choose the level of logging detail. Options include %s, %s, %s, or %s", errorLoggingLevel, warnLoggingLevel, infoLoggingLevel, debugLoggingLevel))
 			fs.String("log-format", autoLoggingFormat, fmt.Sprintf("Specify the format of logging. Options include %s, %s, or %s", autoLoggingFormat, jsonLoggingFormat, textLoggingFormat))
 			fs.String("log-fields-prefix", "", "Prepend a specified prefix to each field in the logs")
+			fs.Bool("log-enable-gcp-severity", false, "Enable Google Cloud Platform severity mapping")
 
 			return fs
 		}(),
@@ -62,6 +64,7 @@ func (log *Logging) Provision(ctx *gotenberg.Context) error {
 	log.level = flags.MustString("log-level")
 	log.format = flags.MustString("log-format")
 	log.fieldsPrefix = flags.MustString("log-fields-prefix")
+	log.enableGcpSeverity = flags.MustBool("log-enable-gcp-severity")
 
 	return nil
 }
@@ -101,7 +104,7 @@ func (log *Logging) Logger(mod gotenberg.Module) (*zap.Logger, error) {
 			return nil, fmt.Errorf("get log level: %w", err)
 		}
 
-		encoder, err := newLogEncoder(log.format)
+		encoder, err := newLogEncoder(log.format, log.enableGcpSeverity)
 		if err != nil {
 			return nil, fmt.Errorf("get log encoder: %w", err)
 		}
@@ -166,7 +169,7 @@ func newLogLevel(level string) (zapcore.Level, error) {
 	return lvl, nil
 }
 
-func newLogEncoder(format string) (zapcore.Encoder, error) {
+func newLogEncoder(format string, gcpSeverity bool) (zapcore.Encoder, error) {
 	isTerminal := term.IsTerminal(int(os.Stdout.Fd()))
 	encCfg := zap.NewProductionEncoderConfig()
 
@@ -177,15 +180,25 @@ func newLogEncoder(format string) (zapcore.Encoder, error) {
 			encoder.AppendString(ts.Local().Format("2006/01/02 15:04:05.000"))
 		}
 
-		if format == textLoggingFormat || format == autoLoggingFormat {
+		if format == autoLoggingFormat {
-			encCfg.EncodeLevel = zapcore.CapitalColorLevelEncoder
+			format = textLoggingFormat
 		}
-	}
 
-	if format == autoLoggingFormat && isTerminal {
+		if format == textLoggingFormat && gcpSeverity {
-		format = textLoggingFormat
+			encCfg.EncodeLevel = gcpSeverityColorEncoder
-	} else if format == autoLoggingFormat {
+		} else if format == textLoggingFormat {
-		format = jsonLoggingFormat
+			encCfg.EncodeLevel = zapcore.CapitalColorLevelEncoder
+		} else if gcpSeverity {
+			encCfg.EncodeLevel = gcpSeverityEncoder
+		}
+	} else {
+		if format == autoLoggingFormat {
+			format = jsonLoggingFormat
+		}
+
+		if gcpSeverity {
+			encCfg.EncodeLevel = gcpSeverityEncoder
+		}
 	}
 
 	switch format {

pkg/modules/logging/logging_test.go

@@ -1,347 +0,0 @@
-package logging
-
-import (
-	"fmt"
-	"reflect"
-	"testing"
-
-	"go.uber.org/zap"
-	"go.uber.org/zap/zapcore"
-	"go.uber.org/zap/zaptest/observer"
-
-	"github.com/gotenberg/gotenberg/v8/pkg/gotenberg"
-)
-
-func TestLogging_Descriptor(t *testing.T) {
-	descriptor := new(Logging).Descriptor()
-
-	actual := reflect.TypeOf(descriptor.New())
-	expect := reflect.TypeOf(new(Logging))
-
-	if actual != expect {
-		t.Errorf("expected '%s' but got '%s'", expect, actual)
-	}
-}
-
-func TestLogging_Provision(t *testing.T) {
-	for _, tc := range []struct {
-		scenario           string
-		level              string
-		format             string
-		fieldsPrefix       string
-		expectLevel        string
-		expectFormat       string
-		expectFieldsPrefix string
-	}{
-		{
-			scenario:           "default values",
-			expectLevel:        infoLoggingLevel,
-			expectFormat:       autoLoggingFormat,
-			expectFieldsPrefix: "",
-		},
-		{
-			scenario:           "explicit values",
-			level:              "debug",
-			format:             "json",
-			fieldsPrefix:       "gotenberg",
-			expectLevel:        debugLoggingLevel,
-			expectFormat:       jsonLoggingFormat,
-			expectFieldsPrefix: "gotenberg",
-		},
-		{
-			scenario:           "wrong values", // no validation at this point.
-			level:              "foo",
-			format:             "foo",
-			expectLevel:        "foo",
-			expectFormat:       "foo",
-			expectFieldsPrefix: "",
-		},
-	} {
-		t.Run(tc.scenario, func(t *testing.T) {
-			var flags []string
-
-			if tc.level != "" {
-				flags = append(flags, "--log-level", tc.level)
-			}
-
-			if tc.format != "" {
-				flags = append(flags, "--log-format", tc.format)
-			}
-
-			if tc.fieldsPrefix != "" {
-				flags = append(flags, "--log-fields-prefix", tc.fieldsPrefix)
-			}
-
-			logging := new(Logging)
-			fs := logging.Descriptor().FlagSet
-
-			err := fs.Parse(flags)
-			if err != nil {
-				t.Fatalf("expected no error while parsing flags but got: %v", err)
-			}
-
-			ctx := gotenberg.NewContext(gotenberg.ParsedFlags{FlagSet: fs}, nil)
-
-			err = logging.Provision(ctx)
-			if err != nil {
-				t.Fatalf("expected no error while provisioning but got: %v", err)
-			}
-
-			if logging.level != tc.expectLevel {
-				t.Errorf("expected logging level '%s' but got '%s'", tc.expectLevel, logging.level)
-			}
-
-			if logging.format != tc.expectFormat {
-				t.Errorf("expected logging format '%s' but got '%s'", tc.expectFormat, logging.format)
-			}
-
-			if logging.fieldsPrefix != tc.expectFieldsPrefix {
-				t.Errorf("expected logging fields prefix '%s' but got '%s'", tc.expectFieldsPrefix, logging.fieldsPrefix)
-			}
-		})
-	}
-}
-
-func TestLogging_Validate(t *testing.T) {
-	for _, tc := range []struct {
-		scenario    string
-		level       string
-		format      string
-		expectError bool
-	}{
-		{
-			scenario:    "invalid level",
-			level:       "foo",
-			expectError: true,
-		},
-		{
-			scenario:    "invalid format",
-			level:       debugLoggingLevel,
-			format:      "foo",
-			expectError: true,
-		},
-		{
-			scenario: "valid level and format",
-			level:    debugLoggingLevel,
-			format:   autoLoggingFormat,
-		},
-	} {
-		logging := new(Logging)
-		logging.level = tc.level
-		logging.format = tc.format
-
-		err := logging.Validate()
-
-		if tc.expectError && err == nil {
-			t.Errorf("%s: expected error but got: %v", tc.scenario, err)
-		}
-
-		if !tc.expectError && err != nil {
-			t.Errorf("%s: expected no error but got: %v", tc.scenario, err)
-		}
-	}
-}
-
-func TestLogging_Logger(t *testing.T) {
-	for _, tc := range []struct {
-		scenario     string
-		level        string
-		format       string
-		fieldsPrefix string
-		expectError  bool
-	}{
-		{
-			scenario:    "invalid level",
-			level:       "foo",
-			expectError: true,
-		},
-		{
-			scenario:    "invalid format",
-			level:       debugLoggingLevel,
-			format:      "foo",
-			expectError: true,
-		},
-		{
-			scenario: "valid level and format",
-			level:    debugLoggingLevel,
-			format:   autoLoggingFormat,
-		},
-	} {
-		t.Run(tc.scenario, func(t *testing.T) {
-			logging := new(Logging)
-			logging.level = tc.level
-			logging.format = tc.format
-			logging.fieldsPrefix = tc.fieldsPrefix
-
-			_, err := logging.Logger(&gotenberg.ModuleMock{
-				DescriptorMock: func() gotenberg.ModuleDescriptor {
-					return gotenberg.ModuleDescriptor{ID: "mock", New: nil}
-				},
-			})
-
-			if tc.expectError && err == nil {
-				t.Fatal("expected error but got none")
-			}
-
-			if !tc.expectError && err != nil {
-				t.Fatalf("expected no error but got: %v", err)
-			}
-		})
-	}
-}
-
-func TestCustomCore(t *testing.T) {
-	for _, tc := range []struct {
-		scenario     string
-		level        zapcore.Level
-		fieldsPrefix string
-		expectEntry  bool
-	}{
-		{
-			scenario:     "level enabled",
-			level:        zapcore.DebugLevel,
-			fieldsPrefix: "gotenberg",
-			expectEntry:  true,
-		},
-		{
-			scenario:    "no fields prefix",
-			level:       zapcore.DebugLevel,
-			expectEntry: true,
-		},
-		{
-			scenario: "level disabled",
-			level:    zapcore.ErrorLevel,
-		},
-	} {
-		t.Run(tc.scenario, func(t *testing.T) {
-			core, obsvr := observer.New(tc.level)
-			lgr := zap.New(customCore{
-				Core:         core,
-				fieldsPrefix: tc.fieldsPrefix,
-			}).With(zap.String("a_field", "a value"))
-
-			lgr.Debug("a debug message", zap.String("another_field", "another value"))
-
-			entries := obsvr.TakeAll()
-
-			if tc.expectEntry && len(entries) == 0 {
-				t.Fatal("expected an entry")
-			}
-
-			if !tc.expectEntry && len(entries) != 0 {
-				t.Fatal("expected no entry")
-			}
-
-			var prefix string
-			if tc.fieldsPrefix != "" {
-				prefix = tc.fieldsPrefix + "_"
-			}
-
-			for _, entry := range entries {
-				fields := entry.Context
-
-				if len(fields) != 2 {
-					t.Fatalf("expected 2 fields but got %d", len(fields))
-				}
-
-				if fields[0].Key != fmt.Sprintf("%sa_field", prefix) {
-					t.Errorf("expected 'gotenberg_a_field' but got '%s'", fields[0].Key)
-				}
-
-				if fields[1].Key != fmt.Sprintf("%sanother_field", prefix) {
-					t.Errorf("expected 'gotenberg_another_field' but got '%s'", fields[1].Key)
-				}
-			}
-		})
-	}
-}
-
-func Test_newLogLevel(t *testing.T) {
-	for _, tc := range []struct {
-		scenario       string
-		level          string
-		expectZapLevel zapcore.Level
-		expectError    bool
-	}{
-		{
-			scenario:       "error level",
-			level:          errorLoggingLevel,
-			expectZapLevel: zapcore.ErrorLevel,
-		},
-		{
-			scenario:       "warning level",
-			level:          warnLoggingLevel,
-			expectZapLevel: zapcore.WarnLevel,
-		},
-		{
-			scenario:       "info level",
-			level:          infoLoggingLevel,
-			expectZapLevel: zapcore.InfoLevel,
-		},
-		{
-			scenario:       "debug level",
-			level:          debugLoggingLevel,
-			expectZapLevel: zapcore.DebugLevel,
-		},
-		{
-			scenario:       "invalid level",
-			level:          "foo",
-			expectZapLevel: zapcore.InvalidLevel,
-			expectError:    true,
-		},
-	} {
-		t.Run(tc.scenario, func(t *testing.T) {
-			actual, err := newLogLevel(tc.level)
-
-			if tc.expectError && err == nil {
-				t.Fatal("expected error but got none")
-			}
-
-			if !tc.expectError && err != nil {
-				t.Fatalf("expected no error but got: %v", err)
-			}
-
-			if tc.expectZapLevel != actual {
-				t.Errorf("expected %d level but got %d", tc.expectZapLevel, actual)
-			}
-		})
-	}
-}
-
-func Test_newLogEncoder(t *testing.T) {
-	for _, tc := range []struct {
-		scenario    string
-		format      string
-		expectError bool
-	}{
-		{
-			scenario: "auto format",
-			format:   autoLoggingFormat,
-		},
-		{
-			scenario: "text format",
-			format:   textLoggingFormat,
-		},
-		{
-			scenario: "json format",
-			format:   jsonLoggingFormat,
-		},
-		{
-			scenario:    "invalid format",
-			format:      "foo",
-			expectError: true,
-		},
-	} {
-		t.Run(tc.scenario, func(t *testing.T) {
-			_, err := newLogEncoder(tc.format)
-
-			if tc.expectError && err == nil {
-				t.Fatal("expected error but got none")
-			}
-
-			if !tc.expectError && err != nil {
-				t.Errorf("expected no error but got: %v", err)
-			}
-		})
-	}
-}

pkg/modules/pdfcpu/pdfcpu.go

@@ -5,7 +5,11 @@ import (
 	"errors"
 	"fmt"
 	"os"
+	"os/exec"
 	"path/filepath"
+	"sort"
+	"strings"
+	"syscall"
 
 	"go.uber.org/zap"
 
@@ -52,6 +56,32 @@ func (engine *PdfCpu) Validate() error {
 	return nil
 }
 
+// Debug returns additional debug data.
+func (engine *PdfCpu) Debug() map[string]interface{} {
+	debug := make(map[string]interface{})
+
+	cmd := exec.Command(engine.binPath, "version") //nolint:gosec
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+
+	output, err := cmd.Output()
+	if err != nil {
+		debug["version"] = err.Error()
+		return debug
+	}
+
+	debug["version"] = "Unable to determine pdfcpu version"
+
+	lines := strings.Split(string(output), "\n")
+	for _, line := range lines {
+		if strings.HasPrefix(line, "pdfcpu:") {
+			debug["version"] = strings.TrimSpace(strings.TrimPrefix(line, "pdfcpu:"))
+			break
+		}
+	}
+
+	return debug
+}
+
 // Merge combines multiple PDFs into a single PDF.
 func (engine *PdfCpu) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
 	var args []string
@@ -99,11 +129,25 @@ func (engine *PdfCpu) Split(ctx context.Context, logger *zap.Logger, mode gotenb
 		return nil, fmt.Errorf("split PDFs with pdfcpu: %w", err)
 	}
 
-	outputPaths, err := gotenberg.WalkDir(outputDirPath, ".pdf")
+	var outputPaths []string
+	err = filepath.Walk(outputDirPath, func(path string, info os.FileInfo, pathErr error) error {
+		if pathErr != nil {
+			return pathErr
+		}
+		if info.IsDir() {
+			return nil
+		}
+		if strings.EqualFold(filepath.Ext(info.Name()), ".pdf") {
+			outputPaths = append(outputPaths, path)
+		}
+		return nil
+	})
 	if err != nil {
 		return nil, fmt.Errorf("walk directory to find resulting PDFs from split with pdfcpu: %w", err)
 	}
 
+	sort.Sort(gotenberg.AlphanumericSort(outputPaths))
+
 	return outputPaths, nil
 }
 
@@ -132,5 +176,6 @@ var (
 	_ gotenberg.Module      = (*PdfCpu)(nil)
 	_ gotenberg.Provisioner = (*PdfCpu)(nil)
 	_ gotenberg.Validator   = (*PdfCpu)(nil)
+	_ gotenberg.Debuggable  = (*PdfCpu)(nil)
 	_ gotenberg.PdfEngine   = (*PdfCpu)(nil)
 )

pkg/modules/pdfcpu/pdfcpu_test.go

@@ -71,6 +71,59 @@ func TestPdfCpu_Validate(t *testing.T) {
 	}
 }
 
+func TestPdfCpu_Debug(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		engine      *PdfCpu
+		expect      map[string]interface{}
+		doNotExpect map[string]interface{}
+	}{
+		{
+			scenario: "cannot determine version (command error)",
+			engine: &PdfCpu{
+				binPath: "foo",
+			},
+			expect: map[string]interface{}{
+				"version": `exec: "foo": executable file not found in $PATH`,
+			},
+		},
+		{
+			scenario: "cannot determine version (no pdfcpu)",
+			engine: &PdfCpu{
+				binPath: "echo",
+			},
+			expect: map[string]interface{}{
+				"version": "Unable to determine pdfcpu version",
+			},
+		},
+		{
+			scenario: "success",
+			engine: &PdfCpu{
+				binPath: "pdfcpu",
+			},
+			doNotExpect: map[string]interface{}{
+				"version": "Unable to determine pdfcpu version",
+			},
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			d := tc.engine.Debug()
+
+			if tc.expect != nil {
+				if !reflect.DeepEqual(d, tc.expect) {
+					t.Errorf("expected '%v' but got '%v'", tc.expect, d)
+				}
+			}
+
+			if tc.doNotExpect != nil {
+				if reflect.DeepEqual(d, tc.doNotExpect) {
+					t.Errorf("did not expect '%v'", d)
+				}
+			}
+		})
+	}
+}
+
 func TestPdfCpu_Merge(t *testing.T) {
 	for _, tc := range []struct {
 		scenario    string
@@ -177,15 +230,15 @@ func TestPdfCpu_Split(t *testing.T) {
 			scenario:               "success (intervals)",
 			ctx:                    context.TODO(),
 			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModeIntervals, Span: "1"},
-			inputPath:              "/tests/test/testdata/pdfengines/sample1.pdf",
+			inputPath:              "/tests/test/testdata/pdfengines/sample4.pdf",
 			expectError:            false,
-			expectOutputPathsCount: 3,
+			expectOutputPathsCount: 20,
 		},
 		{
 			scenario:               "success (pages)",
 			ctx:                    context.TODO(),
 			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModePages, Span: "1"},
-			inputPath:              "/tests/test/testdata/pdfengines/sample1.pdf",
+			inputPath:              "/tests/test/testdata/pdfengines/sample4.pdf",
 			expectError:            false,
 			expectOutputPathsCount: 1,
 		},
@@ -193,7 +246,7 @@ func TestPdfCpu_Split(t *testing.T) {
 			scenario:               "success (pages & unify)",
 			ctx:                    context.TODO(),
 			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModePages, Span: "1-2", Unify: true},
-			inputPath:              "/tests/test/testdata/pdfengines/sample1.pdf",
+			inputPath:              "/tests/test/testdata/pdfengines/sample4.pdf",
 			expectError:            false,
 			expectOutputPathsCount: 1,
 		},

pkg/modules/pdfengines/multi.go

@@ -74,16 +74,14 @@ func (multi *multiPdfEngines) Split(ctx context.Context, logger *zap.Logger, mod
 	var err error
 	var mu sync.Mutex // to safely append errors.
 
-	resultChan := make(chan splitResult, len(multi.splitEngines))
-
 	for _, engine := range multi.splitEngines {
+		resultChan := make(chan splitResult, 1)
+
 		go func(engine gotenberg.PdfEngine) {
 			outputPaths, err := engine.Split(ctx, logger, mode, inputPath, outputDirPath)
 			resultChan <- splitResult{outputPaths: outputPaths, err: err}
 		}(engine)
-	}
 
-	for range multi.splitEngines {
 		select {
 		case result := <-resultChan:
 			if result.err != nil {
@@ -160,16 +158,14 @@ func (multi *multiPdfEngines) ReadMetadata(ctx context.Context, logger *zap.Logg
 	var err error
 	var mu sync.Mutex // to safely append errors.
 
-	resultChan := make(chan readMetadataResult, len(multi.readMetadataEngines))
-
 	for _, engine := range multi.readMetadataEngines {
+		resultChan := make(chan readMetadataResult, 1)
+
 		go func(engine gotenberg.PdfEngine) {
 			metadata, err := engine.ReadMetadata(ctx, logger, inputPath)
 			resultChan <- readMetadataResult{metadata: metadata, err: err}
 		}(engine)
-	}
 
-	for range multi.readMetadataEngines {
 		select {
 		case result := <-resultChan:
 			if result.err != nil {

pkg/modules/pdftk/pdftk.go

@@ -1,11 +1,14 @@
 package pdftk
 
 import (
+	"bytes"
 	"context"
 	"errors"
 	"fmt"
 	"os"
+	"os/exec"
 	"path/filepath"
+	"syscall"
 
 	"go.uber.org/zap"
 
@@ -52,6 +55,29 @@ func (engine *PdfTk) Validate() error {
 	return nil
 }
 
+// Debug returns additional debug data.
+func (engine *PdfTk) Debug() map[string]interface{} {
+	debug := make(map[string]interface{})
+
+	cmd := exec.Command(engine.binPath, "--version") //nolint:gosec
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+
+	output, err := cmd.Output()
+	if err != nil {
+		debug["version"] = err.Error()
+		return debug
+	}
+
+	lines := bytes.SplitN(output, []byte("\n"), 2)
+	if len(lines) > 0 {
+		debug["version"] = string(lines[0])
+	} else {
+		debug["version"] = "Unable to determine PDFtk version"
+	}
+
+	return debug
+}
+
 // Split splits a given PDF file.
 func (engine *PdfTk) Split(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
 	var args []string
@@ -124,5 +150,6 @@ var (
 	_ gotenberg.Module      = (*PdfTk)(nil)
 	_ gotenberg.Provisioner = (*PdfTk)(nil)
 	_ gotenberg.Validator   = (*PdfTk)(nil)
+	_ gotenberg.Debuggable  = (*PdfTk)(nil)
 	_ gotenberg.PdfEngine   = (*PdfTk)(nil)
 )

pkg/modules/pdftk/pdftk_test.go

@@ -71,6 +71,50 @@ func TestPdfTk_Validate(t *testing.T) {
 	}
 }
 
+func TestPdfTk_Debug(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		engine      *PdfTk
+		expect      map[string]interface{}
+		doNotExpect map[string]interface{}
+	}{
+		{
+			scenario: "cannot determine version",
+			engine: &PdfTk{
+				binPath: "foo",
+			},
+			expect: map[string]interface{}{
+				"version": `exec: "foo": executable file not found in $PATH`,
+			},
+		},
+		{
+			scenario: "success",
+			engine: &PdfTk{
+				binPath: "echo",
+			},
+			doNotExpect: map[string]interface{}{
+				"version": `exec: "echo": executable file not found in $PATH`,
+			},
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			d := tc.engine.Debug()
+
+			if tc.expect != nil {
+				if !reflect.DeepEqual(d, tc.expect) {
+					t.Errorf("expected '%v' but got '%v'", tc.expect, d)
+				}
+			}
+
+			if tc.doNotExpect != nil {
+				if reflect.DeepEqual(d, tc.doNotExpect) {
+					t.Errorf("did not expect '%v'", d)
+				}
+			}
+		})
+	}
+}
+
 func TestPdfTk_Merge(t *testing.T) {
 	for _, tc := range []struct {
 		scenario    string

pkg/modules/qpdf/qpdf.go

@@ -1,11 +1,14 @@
 package qpdf
 
 import (
+	"bytes"
 	"context"
 	"errors"
 	"fmt"
 	"os"
+	"os/exec"
 	"path/filepath"
+	"syscall"
 
 	"go.uber.org/zap"
 
@@ -19,7 +22,8 @@ func init() {
 // QPdf abstracts the CLI tool QPDF and implements the [gotenberg.PdfEngine]
 // interface.
 type QPdf struct {
-	binPath string
+	binPath    string
+	globalArgs []string
 }
 
 // Descriptor returns a [QPdf]'s module descriptor.
@@ -38,6 +42,8 @@ func (engine *QPdf) Provision(ctx *gotenberg.Context) error {
 	}
 
 	engine.binPath = binPath
+	// Warnings should not cause errors.
+	engine.globalArgs = []string{"--warning-exit-0"}
 
 	return nil
 }
@@ -52,6 +58,29 @@ func (engine *QPdf) Validate() error {
 	return nil
 }
 
+// Debug returns additional debug data.
+func (engine *QPdf) Debug() map[string]interface{} {
+	debug := make(map[string]interface{})
+
+	cmd := exec.Command(engine.binPath, "--version") //nolint:gosec
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+
+	output, err := cmd.Output()
+	if err != nil {
+		debug["version"] = err.Error()
+		return debug
+	}
+
+	lines := bytes.SplitN(output, []byte("\n"), 2)
+	if len(lines) > 0 {
+		debug["version"] = string(lines[0])
+	} else {
+		debug["version"] = "Unable to determine QPDF version"
+	}
+
+	return debug
+}
+
 // Split splits a given PDF file.
 func (engine *QPdf) Split(ctx context.Context, logger *zap.Logger, mode gotenberg.SplitMode, inputPath, outputDirPath string) ([]string, error) {
 	var args []string
@@ -62,7 +91,10 @@ func (engine *QPdf) Split(ctx context.Context, logger *zap.Logger, mode gotenber
 		if !mode.Unify {
 			return nil, fmt.Errorf("split PDFs using mode '%s' without unify with QPDF: %w", mode.Mode, gotenberg.ErrPdfSplitModeNotSupported)
 		}
-		args = append(args, inputPath, "--pages", ".", mode.Span, "--", outputPath)
+		args = append(args, inputPath)
+		args = append(args, engine.globalArgs...)
+		args = append(args, "--pages", ".", mode.Span)
+		args = append(args, "--", outputPath)
 	default:
 		return nil, fmt.Errorf("split PDFs using mode '%s' with QPDF: %w", mode.Mode, gotenberg.ErrPdfSplitModeNotSupported)
 	}
@@ -84,6 +116,7 @@ func (engine *QPdf) Split(ctx context.Context, logger *zap.Logger, mode gotenber
 func (engine *QPdf) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
 	var args []string
 	args = append(args, "--empty")
+	args = append(args, engine.globalArgs...)
 	args = append(args, "--pages")
 	args = append(args, inputPaths...)
 	args = append(args, "--", outputPath)
@@ -105,10 +138,11 @@ func (engine *QPdf) Merge(ctx context.Context, logger *zap.Logger, inputPaths []
 // original annotations.
 func (engine *QPdf) Flatten(ctx context.Context, logger *zap.Logger, inputPath string) error {
 	var args []string
+	args = append(args, inputPath)
 	args = append(args, "--generate-appearances")
 	args = append(args, "--flatten-annotations=all")
 	args = append(args, "--replace-input")
-	args = append(args, inputPath)
+	args = append(args, engine.globalArgs...)
 
 	cmd, err := gotenberg.CommandContext(ctx, logger, engine.binPath, args...)
 	if err != nil {
@@ -142,5 +176,6 @@ var (
 	_ gotenberg.Module      = (*QPdf)(nil)
 	_ gotenberg.Provisioner = (*QPdf)(nil)
 	_ gotenberg.Validator   = (*QPdf)(nil)
+	_ gotenberg.Debuggable  = (*QPdf)(nil)
 	_ gotenberg.PdfEngine   = (*QPdf)(nil)
 )

pkg/modules/qpdf/qpdf_test.go

@@ -73,6 +73,50 @@ func TestQPdf_Validate(t *testing.T) {
 	}
 }
 
+func TestQPdf_Debug(t *testing.T) {
+	for _, tc := range []struct {
+		scenario    string
+		engine      *QPdf
+		expect      map[string]interface{}
+		doNotExpect map[string]interface{}
+	}{
+		{
+			scenario: "cannot determine version",
+			engine: &QPdf{
+				binPath: "foo",
+			},
+			expect: map[string]interface{}{
+				"version": `exec: "foo": executable file not found in $PATH`,
+			},
+		},
+		{
+			scenario: "success",
+			engine: &QPdf{
+				binPath: "echo",
+			},
+			doNotExpect: map[string]interface{}{
+				"version": `exec: "echo": executable file not found in $PATH`,
+			},
+		},
+	} {
+		t.Run(tc.scenario, func(t *testing.T) {
+			d := tc.engine.Debug()
+
+			if tc.expect != nil {
+				if !reflect.DeepEqual(d, tc.expect) {
+					t.Errorf("expected '%v' but got '%v'", tc.expect, d)
+				}
+			}
+
+			if tc.doNotExpect != nil {
+				if reflect.DeepEqual(d, tc.doNotExpect) {
+					t.Errorf("did not expect '%v'", d)
+				}
+			}
+		})
+	}
+}
+
 func TestQPdf_Merge(t *testing.T) {
 	for _, tc := range []struct {
 		scenario    string
@@ -110,6 +154,15 @@ func TestQPdf_Merge(t *testing.T) {
 			},
 			expectError: false,
 		},
+		{
+			scenario: "success even with warnings",
+			ctx:      context.TODO(),
+			inputPaths: []string{
+				"/tests/test/testdata/pdfengines/sample1.pdf",
+				"/tests/test/testdata/pdfengines/sample5.pdf",
+			},
+			expectError: false,
+		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			engine := new(QPdf)
@@ -192,6 +245,14 @@ func TestQPdf_Split(t *testing.T) {
 			expectError:            false,
 			expectOutputPathsCount: 1,
 		},
+		{
+			scenario:               "success even with warnings",
+			ctx:                    context.TODO(),
+			mode:                   gotenberg.SplitMode{Mode: gotenberg.SplitModePages, Span: "1-2", Unify: true},
+			inputPath:              "/tests/test/testdata/pdfengines/sample5.pdf",
+			expectError:            false,
+			expectOutputPathsCount: 1,
+		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			engine := new(QPdf)
@@ -260,6 +321,13 @@ func TestQPdf_Flatten(t *testing.T) {
 			createCopy:  true,
 			expectError: false,
 		},
+		{
+			scenario:    "success even with warnings",
+			ctx:         context.TODO(),
+			inputPath:   "/tests/test/testdata/pdfengines/sample5.pdf",
+			createCopy:  true,
+			expectError: false,
+		},
 	} {
 		t.Run(tc.scenario, func(t *testing.T) {
 			engine := new(QPdf)