pw: configure syslog tag to contain the subcommand

Instead of:

pw[1175704]: bus.go:83: starting webhook worker#2
pw[1175704]: bus.go:83: starting webhook worker#3
pw[1175704]: bus.go:83: starting webhook worker#1
pw[1175704]: bus.go:83: starting webhook worker#4
pw[1175704]: main.go:57: patchwork v4.0.0-rc4-1-g98a3cc54 listening on http://127.0.0.1:8888

Change to:

pw-http[1175704]: bus.go:83: starting webhook worker#2
pw-http[1175704]: bus.go:83: starting webhook worker#3
pw-http[1175704]: bus.go:83: starting webhook worker#1
pw-http[1175704]: bus.go:83: starting webhook worker#4
pw-http[1175704]: main.go:57: patchwork v4.0.0-rc4-1-g98a3cc54 listening on http://127.0.0.1:8888

Signed-off-by: Robin Jarry <robin@jarry.cc>

Author: rjarry

cmd/pw/main.go

@@ -63,7 +63,7 @@ func main() {
 	}
 
 	if cli.Syslog {
-		log.InitSyslog()
+		log.InitSyslog("pw-" + k.Command())
 		k.Stderr = log.ErrLogger().Writer()
 	}
 

pkg/log/log.go

@@ -10,7 +10,6 @@ import (
 	"log"
 	"log/syslog"
 	"os"
-	"path"
 
 	"golang.org/x/term"
 )
@@ -33,11 +32,10 @@ func newSyslog(tag string, prio syslog.Priority) *log.Logger {
 	return log.New(w, "", log.Lshortfile)
 }
 
-func InitSyslog() {
+func InitSyslog(tag string) {
 	if term.IsTerminal(int(os.Stderr.Fd())) {
 		return
 	}
-	tag := path.Base(os.Args[0])
 	dbg = newSyslog(tag, syslog.LOG_DEBUG)
 	notice = newSyslog(tag, syslog.LOG_NOTICE)
 	info = newSyslog(tag, syslog.LOG_INFO)