[minor] support debug mode in api

src/mig/api/api.go

@@ -30,6 +30,7 @@ func main() {
 
 	// command line options
 	var config = flag.String("c", "/etc/mig/api.cfg", "Load configuration from file")
+	var debug = flag.Bool("d", false, "Debug mode: run in foreground, log to stdout.")
 	var showversion = flag.Bool("V", false, "Show build version and exit")
 	flag.Parse()
 
@@ -41,7 +42,7 @@ func main() {
 	// The context initialization takes care of parsing the configuration,
 	// and creating connections to database, syslog, ...
 	fmt.Fprintf(os.Stderr, "Initializing API context...")
-	ctx, err = Init(*config) //ctx is a global variable
+	ctx, err = Init(*config, *debug) //ctx is a global variable
 	if err != nil {
 		fmt.Printf("\nFATAL: %v\n", err)
 		os.Exit(9)

src/mig/api/context.go

@@ -52,7 +52,7 @@ type Context struct {
 
 // Init() initializes a context from a configuration file into an
 // existing context struct
-func Init(path string) (ctx Context, err error) {
+func Init(path string, debug bool) (ctx Context, err error) {
 	defer func() {
 		if e := recover(); e != nil {
 			err = fmt.Errorf("Init() -> %v", e)
@@ -71,6 +71,10 @@ func Init(path string) (ctx Context, err error) {
 		panic(err)
 	}
 
+	if debug {
+		ctx.Logging.Level = "debug"
+		ctx.Logging.Mode = "stdout"
+	}
 	ctx.Logging, err = mig.InitLogger(ctx.Logging, "mig-api")
 	if err != nil {
 		panic(err)