wip refactoring: better logging and error systems

internal/pkg/logger/doc.go

@@ -0,0 +1 @@
+package logger

internal/pkg/logger/logger.go

@@ -0,0 +1,33 @@
+package logger
+
+import (
+	"github.com/sirupsen/logrus"
+)
+
+// Logger enforces specific log message formats.
+type Logger struct {
+	*logrus.Entry
+}
+
+// New initializes the logger.
+func New(level logrus.Level, trace string) *Logger {
+	l := logrus.New()
+	l.SetLevel(level)
+	// TODO no formatter if TTY.
+	l.SetFormatter(&logrus.JSONFormatter{})
+	return &Logger{
+		l.WithField("trace", trace),
+	}
+}
+
+// DebugfOp logs a debug message for given
+// logical operation.
+func (l *Logger) DebugfOp(op string, format string, args ...interface{}) {
+	l.WithField("op", op).Debugf(format, args...)
+}
+
+// ErrorOp logs an error message for given
+// logical operation.
+func (l *Logger) ErrorOp(op string, err error) {
+	l.WithField("op", op).Error(err.Error())
+}