use flag pkg as all app config is done by file

config.go

@@ -23,7 +23,7 @@ const (
 var defaultRoot = path.Join(os.TempDir(), "git-mirror", "src")
 
 // WatchConfig polls the config file every interval and reloads if modified
-func WatchConfig(ctx context.Context, path string, interval time.Duration, onChange func(*mirror.RepoPoolConfig)) {
+func WatchConfig(ctx context.Context, path string, watchConfig bool, interval time.Duration, onChange func(*mirror.RepoPoolConfig)) {
 	var lastModTime time.Time
 
 	for {
@@ -47,6 +47,10 @@ func WatchConfig(ctx context.Context, path string, interval time.Duration, onCha
 			}
 		}
 
+		if !watchConfig {
+			return
+		}
+
 		t := time.NewTimer(interval)
 		select {
 		case <-t.C:

go.mod

@@ -6,7 +6,6 @@ require (
 	github.com/google/go-cmp v0.7.0
 	github.com/prometheus/client_golang v1.21.1
 	github.com/sasha-s/go-deadlock v0.3.5
-	github.com/urfave/cli/v3 v3.0.0-beta1
 	gopkg.in/yaml.v3 v3.0.1
 )
 

go.sum

@@ -15,20 +15,15 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/petermattis/goid v0.0.0-20240813172612-4fcff4a6cae7 h1:Dx7Ovyv/SFnMFw3fD4oEoeorXc6saIiQ23LrGLth0Gw=
 github.com/petermattis/goid v0.0.0-20240813172612-4fcff4a6cae7/go.mod h1:pxMtw7cyUw6B2bRH0ZBANSPg+AoSud1I1iyJHI69jH4=
 github.com/petermattis/goid v0.0.0-20250303134427-723919f7f203 h1:E7Kmf11E4K7B5hDti2K2NqPb1nlYlGYsu02S1JNd/Bs=
 github.com/petermattis/goid v0.0.0-20250303134427-723919f7f203/go.mod h1:pxMtw7cyUw6B2bRH0ZBANSPg+AoSud1I1iyJHI69jH4=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_golang v1.21.0 h1:DIsaGmiaBkSangBgMtWdNfxbMNdku5IK6iNhrEqWvdA=
-github.com/prometheus/client_golang v1.21.0/go.mod h1:U9NM32ykUErtVBxdvD3zfi+EuFkkaBvMb09mIfe0Zgg=
 github.com/prometheus/client_golang v1.21.1 h1:DOvXXTqVzvkIewV/CDPFdejpMCGeMcbGCQ8YOmu+Ibk=
 github.com/prometheus/client_golang v1.21.1/go.mod h1:U9NM32ykUErtVBxdvD3zfi+EuFkkaBvMb09mIfe0Zgg=
 github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
 github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
-github.com/prometheus/common v0.62.0 h1:xasJaQlnWAeyHdUBeGjXmutelfJHWMRr+Fg4QszZ2Io=
-github.com/prometheus/common v0.62.0/go.mod h1:vyBcEuLSvWos9B1+CyL7JZ2up+uFzXhkqml0W5zIY1I=
 github.com/prometheus/common v0.63.0 h1:YR/EIY1o3mEFP/kZCD7iDMnLPlGyuU2Gb3HIcXnA98k=
 github.com/prometheus/common v0.63.0/go.mod h1:VVFF/fBIoToEnWRVkYoXEkq3R3paCoxG9PXP74SnV18=
 github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
@@ -39,14 +34,8 @@ github.com/sasha-s/go-deadlock v0.3.5 h1:tNCOEEDG6tBqrNDOX35j/7hL5FcFViG6awUGROb
 github.com/sasha-s/go-deadlock v0.3.5/go.mod h1:bugP6EGbdGYObIlx7pUZtWqlvo8k9H6vCBBsiChJQ5U=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
-github.com/urfave/cli/v3 v3.0.0-beta1 h1:6DTaaUarcM0wX7qj5Hcvs+5Dm3dyUTBbEwIWAjcw9Zg=
-github.com/urfave/cli/v3 v3.0.0-beta1/go.mod h1:FnIeEMYu+ko8zP1F9Ypr3xkZMIDqW3DR92yUtY39q1Y=
-golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
-golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.31.0 h1:ioabZlmFYtWhL+TRYpcnNlLwhyxaM9kWTDEmfnprqik=
 golang.org/x/sys v0.31.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
-google.golang.org/protobuf v1.36.1 h1:yBPeRvTftaleIgM3PZ/WBIZ7XM/eEYAaEyCwvyjq/gk=
-google.golang.org/protobuf v1.36.1/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 google.golang.org/protobuf v1.36.5 h1:tPhr+woSbjfYvY6/GPufUoYizxw1cF/yFoxJ2fmpwlM=
 google.golang.org/protobuf v1.36.5/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

main.go

@@ -2,15 +2,16 @@ package main
 
 import (
 	"context"
+	"flag"
 	"fmt"
 	"log/slog"
 	"os"
 	"os/signal"
+	"strconv"
 	"strings"
 	"syscall"
 	"time"
 
-	"github.com/urfave/cli/v3"
 	"github.com/utilitywarehouse/git-mirror/pkg/mirror"
 )
 
@@ -25,27 +26,6 @@ var (
 		"warn":  slog.LevelWarn,
 		"error": slog.LevelError,
 	}
-
-	flags = []cli.Flag{
-		&cli.StringFlag{
-			Name:    "config",
-			Sources: cli.EnvVars("GIT_MIRROR_CONFIG"),
-			Value:   "/etc/git-mirror/config.yaml",
-			Usage:   "Absolute path to the config file.",
-		},
-		&cli.StringFlag{
-			Name:    "log-level",
-			Sources: cli.EnvVars("LOG_LEVEL"),
-			Value:   "info",
-			Usage:   "Log level",
-		},
-		&cli.BoolFlag{
-			Name: "watch-config",
-			Usage: "watch config for changes and reload when changes encountered.\n" +
-				"Only changes related to add,remove repository or worktrees will be actioned.",
-			Value: true,
-		},
-	}
 )
 
 func init() {
@@ -55,62 +35,89 @@ func init() {
 	}))
 }
 
+func envString(key, fallback string) string {
+	value, ok := os.LookupEnv(key)
+	if ok {
+		return value
+	}
+	return fallback
+}
+
+func envBool(key string, fallback bool) bool {
+	value, ok := os.LookupEnv(key)
+	if ok {
+		parsed, err := strconv.ParseBool(value)
+		if err == nil {
+			return parsed
+		}
+		return fallback
+	}
+	return fallback
+}
+
+func usage() {
+	fmt.Fprintf(os.Stderr, "NAME:\n")
+	fmt.Fprintf(os.Stderr, "\tgit-mirror - git-mirror is a tool to periodically mirror remote repositories locally.\n")
+	fmt.Fprintf(os.Stderr, "\nUsage:\n")
+	fmt.Fprintf(os.Stderr, "\tgit-mirror [global options]\n")
+	fmt.Fprintf(os.Stderr, "\nGLOBAL OPTIONS:\n")
+	fmt.Fprintf(os.Stderr, "\t-log-level value    (default: 'info') Log level [$LOG_LEVEL]\n")
+	fmt.Fprintf(os.Stderr, "\t-config value       (default: '/etc/git-mirror/config.yaml') Absolute path to the config file. [$GIT_MIRROR_CONFIG]\n")
+	fmt.Fprintf(os.Stderr, "\t-watch-config value (default: true) watch config for changes and reload when changes encountered. [$GIT_MIRROR_WATCH_CONFIG]\n")
+
+	os.Exit(2)
+}
+
 func main() {
-	cmd := &cli.Command{
-		Name:  "git-mirror",
-		Usage: "git-mirror is a tool to periodically mirror remote repositories locally.",
-		Flags: flags,
-		Action: func(ctx context.Context, c *cli.Command) error {
-			ctx, cancel := context.WithCancel(ctx)
-
-			// set log level according to argument
-			if v, ok := levelStrings[strings.ToLower(c.String("log-level"))]; ok {
-				loggerLevel.Set(v)
-			}
-
-			// path to resolve git
-			gitENV := []string{fmt.Sprintf("PATH=%s", os.Getenv("PATH"))}
-
-			// create empty repo pool which will be populated by watchConfig
-			repoPool, err := mirror.NewRepoPool(ctx, mirror.RepoPoolConfig{}, logger.With("logger", "git-mirror"), gitENV)
-			if err != nil {
-				logger.Error("could not create git mirror pool", "err", err)
-				os.Exit(1)
-			}
-
-			onConfigChange := func(config *mirror.RepoPoolConfig) {
-				ensureConfig(repoPool, config)
-				// start mirror Loop on newly added repos
-				repoPool.StartLoop()
-			}
-
-			// Start watching the config file
-			go WatchConfig(ctx, c.String("config"), 10*time.Second, onConfigChange)
-
-			//listenForShutdown
-			stop := make(chan os.Signal, 2)
-			signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
-
-			<-stop
-
-			logger.Info("shutting down...")
-			cancel()
-
-			select {
-			case <-repoPool.Stopped:
-				logger.Info("all repositories mirror loop is stopped")
-				os.Exit(0)
-
-			case <-stop:
-				logger.Info("second signal received, terminating")
-				os.Exit(1)
-			}
-			return nil
-		},
+	ctx, cancel := context.WithCancel(context.Background())
+
+	flagLogLevel := flag.String("log-level", envString("LOG_LEVEL", "info"), "Log level")
+	flagConfig := flag.String("config", envString("GIT_MIRROR_CONFIG", "/etc/git-mirror/config.yaml"), "Absolute path to the config file")
+	flagWatchConfig := flag.Bool("watch-config", envBool("GIT_MIRROR_WATCH_CONFIG", true), "watch config for changes and reload when changes encountered")
+
+	flag.Usage = usage
+	flag.Parse()
+
+	// set log level according to argument
+	if v, ok := levelStrings[strings.ToLower(*flagLogLevel)]; ok {
+		loggerLevel.Set(v)
+	}
+
+	// path to resolve git
+	gitENV := []string{fmt.Sprintf("PATH=%s", os.Getenv("PATH"))}
+
+	// create empty repo pool which will be populated by watchConfig
+	repoPool, err := mirror.NewRepoPool(ctx, mirror.RepoPoolConfig{}, logger.With("logger", "git-mirror"), gitENV)
+	if err != nil {
+		logger.Error("could not create git mirror pool", "err", err)
+		os.Exit(1)
+	}
+
+	onConfigChange := func(config *mirror.RepoPoolConfig) {
+		ensureConfig(repoPool, config)
+		// start mirror Loop on newly added repos
+		repoPool.StartLoop()
 	}
 
-	if err := cmd.Run(context.Background(), os.Args); err != nil {
-		logger.Error("failed to run app", "err", err)
+	// Start watching the config file
+	go WatchConfig(ctx, *flagConfig, *flagWatchConfig, 10*time.Second, onConfigChange)
+
+	//listenForShutdown
+	stop := make(chan os.Signal, 2)
+	signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
+
+	<-stop
+
+	logger.Info("shutting down...")
+	cancel()
+
+	select {
+	case <-repoPool.Stopped:
+		logger.Info("all repositories mirror loop is stopped")
+		os.Exit(0)
+
+	case <-stop:
+		logger.Info("second signal received, terminating")
 		os.Exit(1)
 	}
 }