add logging fields

internal/log/log.go

@@ -0,0 +1,29 @@
+package log
+
+import "github.com/anchore/imgbom/imgbom/logger"
+
+var Log logger.Logger = &nopLogger{}
+
+func Errorf(format string, args ...interface{}) {
+	Log.Errorf(format, args...)
+}
+
+func Infof(format string, args ...interface{}) {
+	Log.Infof(format, args...)
+}
+
+func Info(args ...interface{}) {
+	Log.Info(args...)
+}
+
+func Debugf(format string, args ...interface{}) {
+	Log.Debugf(format, args...)
+}
+
+func Debug(args ...interface{}) {
+	Log.Debug(args...)
+}
+
+func WithFields(fields map[string]interface{}) logger.Logger {
+	return Log.WithFields(fields)
+}

internal/log/nop.go

@@ -0,0 +1,12 @@
+package log
+
+import "github.com/anchore/imgbom/imgbom/logger"
+
+type nopLogger struct{}
+
+func (l *nopLogger) Errorf(format string, args ...interface{})              {}
+func (l *nopLogger) Infof(format string, args ...interface{})               {}
+func (l *nopLogger) Info(args ...interface{})                               {}
+func (l *nopLogger) Debugf(format string, args ...interface{})              {}
+func (l *nopLogger) Debug(args ...interface{})                              {}
+func (l *nopLogger) WithFields(fields map[string]interface{}) logger.Logger { return &nopLogger{} }