Use a single logger instance

Close #6

cmd/gaper/main.go

@@ -15,16 +15,18 @@ var (
 	version = "1.0.1-dev"
 )
 
-var logger = gaper.NewLogger("gaper")
-
 func main() {
+	logger := gaper.Logger()
+	loggerVerbose := false
+
 	parseArgs := func(c *cli.Context) *gaper.Config {
+		loggerVerbose = c.Bool("verbose")
+
 		return &gaper.Config{
 			BinName:              c.String("bin-name"),
 			BuildPath:            c.String("build-path"),
 			BuildArgsMerged:      c.String("build-args"),
 			ProgramArgsMerged:    c.String("program-args"),
-			Verbose:              c.Bool("verbose"),
 			DisableDefaultIgnore: c.Bool("disable-default-ignore"),
 			WatchItems:           c.StringSlice("watch"),
 			IgnoreItems:          c.StringSlice("ignore"),
@@ -42,7 +44,7 @@ func main() {
 	app.Action = func(c *cli.Context) {
 		args := parseArgs(c)
 		chOSSiginal := make(chan os.Signal, 2)
-		logger.Verbose(args.Verbose)
+		logger.Verbose(loggerVerbose)
 
 		if err := gaper.Run(args, chOSSiginal); err != nil {
 			logger.Error(err)

gaper.go

@@ -29,8 +29,6 @@ var (
 	NoRestartOnExit    = "exit"
 )
 
-var logger = NewLogger("gaper")
-
 // exit statuses
 var exitStatusSuccess = 0
 var exitStatusError = 1
@@ -48,7 +46,6 @@ type Config struct {
 	PollInterval         int
 	Extensions           []string
 	NoRestartOn          string
-	Verbose              bool
 	DisableDefaultIgnore bool
 	WorkingDirectory     string
 }

logger.go

@@ -7,18 +7,26 @@ import (
 	"github.com/fatih/color"
 )
 
-// Logger used by gaper
-type Logger struct {
+// logger use by the whole package
+var logger = newLogger("gaper")
+
+// Logger give access to external packages to use gaper logger
+func Logger() *LoggerEntity {
+	return logger
+}
+
+// LoggerEntity used by gaper
+type LoggerEntity struct {
 	verbose  bool
 	logDebug *log.Logger
 	logInfo  *log.Logger
 	logError *log.Logger
 }
 
-// NewLogger creates a new logger
-func NewLogger(prefix string) *Logger {
+// newLogger creates a new logger
+func newLogger(prefix string) *LoggerEntity {
 	prefix = "[" + prefix + "] "
-	return &Logger{
+	return &LoggerEntity{
 		verbose:  false,
 		logDebug: log.New(os.Stdout, prefix, 0),
 		logInfo:  log.New(os.Stdout, color.CyanString(prefix), 0),
@@ -27,35 +35,35 @@ func NewLogger(prefix string) *Logger {
 }
 
 // Verbose toggle this logger verbosity
-func (l *Logger) Verbose(verbose bool) {
+func (l *LoggerEntity) Verbose(verbose bool) {
 	l.verbose = verbose
 }
 
 // Debug logs a debug message
-func (l *Logger) Debug(v ...interface{}) {
+func (l *LoggerEntity) Debug(v ...interface{}) {
 	if l.verbose {
 		l.logDebug.Println(v...)
 	}
 }
 
 // Debugf logs a debug message with format
-func (l *Logger) Debugf(format string, v ...interface{}) {
+func (l *LoggerEntity) Debugf(format string, v ...interface{}) {
 	if l.verbose {
 		l.logDebug.Printf(format, v...)
 	}
 }
 
 // Info logs a info message
-func (l *Logger) Info(v ...interface{}) {
+func (l *LoggerEntity) Info(v ...interface{}) {
 	l.logInfo.Println(v...)
 }
 
 // Error logs an error message
-func (l *Logger) Error(v ...interface{}) {
+func (l *LoggerEntity) Error(v ...interface{}) {
 	l.logError.Println(v...)
 }
 
 // Errorf logs and error message with format
-func (l *Logger) Errorf(format string, v ...interface{}) {
+func (l *LoggerEntity) Errorf(format string, v ...interface{}) {
 	l.logError.Printf(format, v...)
 }

logger_test.go

@@ -7,19 +7,19 @@ import (
 )
 
 func TestLoggerDefault(t *testing.T) {
-	l := NewLogger("gaper-test")
+	l := newLogger("gaper-test")
 	assert.Equal(t, l.verbose, false)
 }
 
 func TestLoggerEnableVerbose(t *testing.T) {
-	l := NewLogger("gaper-test")
+	l := newLogger("gaper-test")
 	l.Verbose(true)
 	assert.Equal(t, l.verbose, true)
 }
 
 func TestLoggerRunAllLogsWithoutVerbose(t *testing.T) {
 	// no asserts, just checking it doesn't crash
-	l := NewLogger("gaper-test")
+	l := newLogger("gaper-test")
 	l.Debug("debug")
 	l.Debugf("%s", "debug")
 	l.Info("info")
@@ -29,7 +29,7 @@ func TestLoggerRunAllLogsWithoutVerbose(t *testing.T) {
 
 func TestLoggerRunAllLogsWithVerbose(t *testing.T) {
 	// no asserts, just checking it doesn't crash
-	l := NewLogger("gaper-test")
+	l := newLogger("gaper-test")
 	l.Verbose(true)
 	l.Debug("debug")
 	l.Debugf("%s", "debug")