Offer debug Make Target

1 files changed, 16 insertions, 11 deletions

diff --git a/src/main.go b/src/main.go
index d64533e..dfcf706 100644
--- a/src/main.go
+++ b/src/main.go
@@ -3,6 +3,7 @@
 package main
 
 import (
+	"flag"
 	"log"
 	"time"
 	"os"
@@ -10,46 +11,50 @@ import (
 	"encoding/json"
 )
 
-const (
-	CONFIG_FILE = "/etc/birdscan/config.json"
-)
-
 type config struct {
 	WebConfig webConfig `json:"webserver"`
 }
 
 func main() {
+	configPath := readFlags()
 	log.SetFlags(0)  // disable timestamp because systemd takes care of that
 	log.Println("Starting birdscan")
-	cfg := readConfig()
+	cfg := readConfig(configPath)
 	go runServer(&cfg.WebConfig)
 	for {
 		time.Sleep(1 * time.Second)
 	}
 }
 
-func readConfig() config {
+func readFlags() string {
+	var retval string
+	flag.StringVar(&retval, "c", "/etc/birdscan/config.json", "Path to birdscan configuration file")
+	flag.Parse()
+	return retval
+}
+
+func readConfig(path string) config {
 
-	log.Printf("Reading config file %s", CONFIG_FILE)
+	log.Printf("Reading config file %s", path)
 	var retval config
 
 	// open the config file
-	configFile, err := os.Open(CONFIG_FILE)
+	configFile, err := os.Open(path)
 	defer configFile.Close()
 	if err != nil {
-		log.Fatalf("Could not open configuration file %s", CONFIG_FILE)
+		log.Fatalf("Could not open configuration file %s", path)
 	}
 
 	// read byte content
 	byteData, err := ioutil.ReadAll(configFile)
 	if err != nil {
-		log.Fatalf("Could not read configuration file %s", CONFIG_FILE)
+		log.Fatalf("Could not read configuration file %s", path)
 	}
 
 	// parse content to config structs
 	err = json.Unmarshal(byteData, &retval)
 	if err != nil {
-		log.Fatalf("Could not parse configuration file %s", CONFIG_FILE)
+		log.Fatalf("Could not parse configuration file %s", path)
 	}
 
 	return retval