Implement live-reloading

1 files changed, 40 insertions, 0 deletions

diff --git a/main.go b/main.go
index 3207f64..c8dead4 100644
--- a/main.go
+++ b/main.go
@@ -5,6 +5,10 @@ package main
 
 import (
 	"flag"
+	"log"
+	"os"
+	"syscall"
+	"time"
 
 	"git.thomasvoss.com/euro-cash.eu/src"
 	"git.thomasvoss.com/euro-cash.eu/src/email"
@@ -12,6 +16,7 @@ import (
 
 func main() {
 	port := flag.Int("port", 8080, "port number")
+	debugp := flag.Bool("debug", false, "run in debug mode")
 	flag.BoolVar(&email.Config.Disabled, "no-email", false,
 		"disables email support")
 	flag.StringVar(&email.Config.Host, "smtp-host", "smtp.migadu.com",
@@ -26,5 +31,40 @@ func main() {
 		"password to authenticate the email client")
 	flag.Parse()
 
+	if *debugp {
+		go watch()
+	}
 	src.Run(*port)
 }
+
+func watch() {
+	path, err := os.Executable()
+	if err != nil {
+		die(err)
+	}
+
+	ostat, err := os.Stat(path)
+	if err != nil {
+		die(err)
+	}
+
+	for {
+		nstat, err := os.Stat(path)
+		if err != nil {
+			die(err)
+		}
+
+		if nstat.ModTime() != ostat.ModTime() {
+			if err := syscall.Exec(path, os.Args, os.Environ()); err != nil {
+				die(err)
+			}
+		}
+
+		time.Sleep(1 * time.Second)
+	}
+}
+
+func die(err error) {
+	log.Fatal(err)
+	os.Exit(1)
+}