adding new attribute lock (#8)

app/config/config.go

@@ -20,6 +20,7 @@ type (
 		port          string
 		logsLevel     logrus.Level
 		logsFormatter logrus.Formatter
+		lock          bool
 		// commands associates a file extension with a Command instance.
 		// Particular case: ".pdf" extension is used for the merge command.
 		commands map[string]*Command
@@ -126,6 +127,16 @@ func GetLogsFormatter() logrus.Formatter {
 	return config.logsFormatter
 }
 
+// WithLock sets the lock strategy.
+func WithLock(lock bool) {
+	config.lock = lock
+}
+
+// HasLock returns the current lock strategy.
+func HasLock() bool {
+	return config.lock
+}
+
 type interpreterEmptyError struct {
 	command string
 }

app/config/config_test.go

@@ -99,6 +99,24 @@ func TestGetLogsFormatter(t *testing.T) {
 	}
 }
 
+func TestWithLock(t *testing.T) {
+	lock := true
+	WithLock(lock)
+
+	if config.lock != lock {
+		t.Errorf("Configuration populated with a wrong lock strategy: got '%t' want '%t'", config.lock, lock)
+	}
+}
+
+func TestHasLock(t *testing.T) {
+	lock := true
+	config.lock = true
+
+	if HasLock() != lock {
+		t.Errorf("Configuration returned a wrong port: got '%t' want '%t'", HasLock(), lock)
+	}
+}
+
 func TestInterpreterEmptyError(t *testing.T) {
 	err := &interpreterEmptyError{"echo hello world"}
 	expected := fmt.Sprintf(interpreterEmptyErrorMessage, err.command)

app/config/parser.go

@@ -23,6 +23,8 @@ func ParseFile(configurationFilePath string) error {
 		return err
 	}
 
+	WithLock(fileConfig.Commands.Lock)
+
 	// handles merge command first...
 	cmd, err := NewCommand(fileConfig.Commands.Merge.Template, fileConfig.Commands.Merge.Interpreter, fileConfig.Commands.Merge.Timeout)
 	if err != nil {
@@ -57,6 +59,7 @@ type (
 			Formatter string `yaml:"formatter"`
 		} `yaml:"logs"`
 		Commands struct {
+			Lock        bool                 `yaml:"lock"`
 			Merge       *mergeCommand        `yaml:"merge"`
 			Conversions []*conversionCommand `yaml:"conversions,omitempty"`
 		} `yaml:"commands"`