refactor(cmd): use cobra for CLI parsing

cmd/root.go

@@ -2,17 +2,19 @@
 package cmd
 
 import (
-	"flag"
 	"fmt"
 	"log/slog"
 	"os"
 
 	"github.com/ayn2op/discordo/internal/config"
+	"github.com/ayn2op/discordo/internal/consts"
 	"github.com/ayn2op/discordo/internal/keyring"
 	"github.com/ayn2op/discordo/internal/logger"
 	"github.com/ayn2op/tview"
 	"github.com/diamondburned/arikawa/v3/utils/ws"
 	"github.com/diamondburned/ningen/v3"
+	"github.com/spf13/cobra"
+	"github.com/spf13/cobra/doc"
 )
 
 var (
@@ -20,46 +22,63 @@ var (
 	app          *application
 )
 
-func Run() error {
-	tokenEnvVar := os.Getenv("DISCORDO_TOKEN")
-	tokenFlag := flag.String("token", tokenEnvVar, "authentication token")
+var (
+	token      string
+	configPath string
+	logPath    string
+	logLevel   string
 
-	configPath := flag.String("config-path", config.DefaultPath(), "path of the configuration file")
-	logPath := flag.String("log-path", logger.DefaultPath(), "path of the log file")
-	logLevel := flag.String("log-level", "info", "log level")
-	flag.Parse()
+	rootCmd = &cobra.Command{
+		Use: consts.Name,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			var level slog.Level
+			switch logLevel {
+			case "debug":
+				ws.EnableRawEvents = true
+				level = slog.LevelDebug
+			case "info":
+				level = slog.LevelInfo
+			case "warn":
+				level = slog.LevelWarn
+			case "error":
+				level = slog.LevelError
+			}
 
-	var level slog.Level
-	switch *logLevel {
-	case "debug":
-		ws.EnableRawEvents = true
-		level = slog.LevelDebug
-	case "info":
-		level = slog.LevelInfo
-	case "warn":
-		level = slog.LevelWarn
-	case "error":
-		level = slog.LevelError
-	}
+			if err := logger.Load(logPath, level); err != nil {
+				return fmt.Errorf("failed to load logger: %w", err)
+			}
 
-	if err := logger.Load(*logPath, level); err != nil {
-		return fmt.Errorf("failed to load logger: %w", err)
-	}
+			cfg, err := config.Load(configPath)
+			if err != nil {
+				return fmt.Errorf("failed to load config: %w", err)
+			}
 
-	cfg, err := config.Load(*configPath)
-	if err != nil {
-		return fmt.Errorf("failed to load config: %w", err)
-	}
+			if token == "" {
+				token = os.Getenv("DISCORDO_TOKEN")
+			}
+
+			if token == "" {
+				token, err = keyring.GetToken()
+				if err != nil {
+					slog.Info("failed to retrieve token from keyring", "err", err)
+				}
+			}
 
-	token := *tokenFlag
-	if token == "" {
-		token, err = keyring.GetToken()
-		if err != nil {
-			slog.Info("failed to retrieve token from keyring", "err", err)
-		}
+			tview.Styles = tview.Theme{}
+			app = newApplication(cfg)
+			return app.run(token)
+		},
 	}
 
-	tview.Styles = tview.Theme{}
-	app = newApplication(cfg)
-	return app.run(token)
+	Execute = rootCmd.Execute
+)
+
+func init() {
+	flags := rootCmd.Flags()
+	flags.StringVar(&token, "token", "", "authentication token")
+
+	flags.StringVar(&configPath, "config-path", config.DefaultPath(), "path of the configuration file")
+
+	flags.StringVar(&logPath, "log-path", logger.DefaultPath(), "path of the log file")
+	flags.StringVar(&logLevel, "log-level", "info", "log level")
 }

go.mod

@@ -18,6 +18,7 @@ require (
 	github.com/sahilm/fuzzy v0.1.1
 	github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
 	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966
+	github.com/spf13/cobra v1.10.1
 	github.com/yuin/goldmark v1.7.13
 	github.com/zalando/go-keyring v0.2.6
 	golang.design/x/clipboard v0.7.1
@@ -29,6 +30,7 @@ require (
 	github.com/akavel/rsrc v0.10.2 // indirect
 	github.com/clipperhouse/stringish v0.1.1 // indirect
 	github.com/clipperhouse/uax29/v2 v2.3.0 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.6 // indirect
 	github.com/danieljoos/wincred v1.2.3 // indirect
 	github.com/dchest/jsmin v1.0.0 // indirect
 	github.com/esiqveland/notify v0.13.3 // indirect
@@ -36,6 +38,7 @@ require (
 	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/godbus/dbus/v5 v5.2.0 // indirect
 	github.com/gorilla/schema v1.4.1 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jackmordaunt/icns/v3 v3.0.1 // indirect
 	github.com/josephspurrier/goversioninfo v1.5.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.3.0 // indirect
@@ -44,8 +47,10 @@ require (
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/randall77/makefat v0.0.0-20210315173500-7ddd0e42c844 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/sergeymakinen/go-bmp v1.0.0 // indirect
 	github.com/sergeymakinen/go-ico v1.0.0 // indirect
+	github.com/spf13/pflag v1.0.9 // indirect
 	github.com/tadvi/systray v0.0.0-20190226123456-11a2b8fa57af // indirect
 	github.com/twmb/murmur3 v1.1.8 // indirect
 	go4.org v0.0.0-20230225012048-214862532bf5 // indirect
@@ -56,4 +61,5 @@ require (
 	golang.org/x/term v0.37.0 // indirect
 	golang.org/x/text v0.31.0 // indirect
 	golang.org/x/time v0.14.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -27,8 +27,6 @@ github.com/akavel/rsrc v0.10.2 h1:Zxm8V5eI1hW4gGaYsJQUhxpjkENuG91ki8B4zCrvEsw=
 github.com/akavel/rsrc v0.10.2/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxkKq+c=
 github.com/andybalholm/brotli v1.2.0 h1:ukwgCxwYrmACq68yiUqwIWnGY0cTPox/M94sVwToPjQ=
 github.com/andybalholm/brotli v1.2.0/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
-github.com/ayn2op/tview v0.0.0-20251115190451-2169530aa5ac h1:UG22UQRonbrJRkHSA6lhvTpdwgRbK6EK3ty+gpcSV0U=
-github.com/ayn2op/tview v0.0.0-20251115190451-2169530aa5ac/go.mod h1:OoFnr4ZtCgg/Kivg4g0Y50FkOMs/IVOR4GD/IibMuJY=
 github.com/ayn2op/tview v0.0.0-20251116022246-85910933646e h1:VLJCDHEMxKUUWuSkjR5x41mQ6pGWGcK57GbHcIXbsDM=
 github.com/ayn2op/tview v0.0.0-20251116022246-85910933646e/go.mod h1:OoFnr4ZtCgg/Kivg4g0Y50FkOMs/IVOR4GD/IibMuJY=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
@@ -40,6 +38,8 @@ github.com/clipperhouse/stringish v0.1.1 h1:+NSqMOr3GR6k1FdRhhnXrLfztGzuG+VuFDfa
 github.com/clipperhouse/stringish v0.1.1/go.mod h1:v/WhFtE1q0ovMta2+m+UbpZ+2/HEXNWYXQgCt4hdOzA=
 github.com/clipperhouse/uax29/v2 v2.3.0 h1:SNdx9DVUqMoBuBoW3iLOj4FQv3dN5mDtuqwuhIGpJy4=
 github.com/clipperhouse/uax29/v2 v2.3.0/go.mod h1:Wn1g7MK6OoeDT0vL+Q0SQLDz/KpfsVRgg6W7ihQeh4g=
+github.com/cpuguy83/go-md2man/v2 v2.0.6 h1:XJtiaUW6dEEqVuZiMTn1ldk455QWwEIsMIJlo5vtkx0=
+github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/danieljoos/wincred v1.2.3 h1:v7dZC2x32Ut3nEfRH+vhoZGvN72+dQ/snVXo/vMFLdQ=
 github.com/danieljoos/wincred v1.2.3/go.mod h1:6qqX0WNrS4RzPZ1tnroDzq9kY3fu1KwE7MRLQK4X0bs=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -106,6 +106,8 @@ github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/ad
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/jackmordaunt/icns/v3 v3.0.1 h1:xxot6aNuGrU+lNgxz5I5H0qSeCjNKp8uTXB1j8D4S3o=
 github.com/jackmordaunt/icns/v3 v3.0.1/go.mod h1:5sHL59nqTd2ynTnowxB/MDQFhKNqkK8X687uKNygaSQ=
 github.com/josephspurrier/goversioninfo v1.5.0 h1:9TJtORoyf4YMoWSOo/cXFN9A/lB3PniJ91OxIH6e7Zg=
@@ -115,8 +117,10 @@ github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/X
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/compress v1.18.1 h1:bcSGx7UbpBqMChDtsF28Lw6v/G94LPrrbMbdC3JH2co=
 github.com/klauspost/compress v1.18.1/go.mod h1:ZQFFVG+MdnR0P+l6wpXgIL4NTtwiKIdBnrBd8Nrxr+0=
+github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
@@ -138,6 +142,8 @@ github.com/randall77/makefat v0.0.0-20210315173500-7ddd0e42c844/go.mod h1:T1TLSf
 github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
+github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd/go.mod h1:hPqNNc0+uJM6H+SuU8sEs5K5IQeKccPqeSjfgcKGgPk=
 github.com/sahilm/fuzzy v0.1.1 h1:ceu5RHF8DGgoi+/dR5PsECjCDH1BE3Fnmpo7aVXOdRA=
 github.com/sahilm/fuzzy v0.1.1/go.mod h1:VFvziUEIMCrT6A6tw2RFIXPXXmzXbOsSHF0DOI8ZK9Y=
@@ -149,6 +155,10 @@ github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e h1:MRM5ITcdelLK2j1
 github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e/go.mod h1:XV66xRDqSt+GTGFMVlhk3ULuV0y9ZmzeVGR4mloJI3M=
 github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966 h1:JIAuq3EEf9cgbU6AtGPK4CTG3Zf6CKMNqf0MHTggAUA=
 github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966/go.mod h1:sUM3LWHvSMaG192sy56D9F7CNvL7jUJVXoqM1QKLnog=
+github.com/spf13/cobra v1.10.1 h1:lJeBwCfmrnXthfAupyUTzJ/J4Nc1RsHC/mSRU2dll/s=
+github.com/spf13/cobra v1.10.1/go.mod h1:7SmJGaTHFVBY0jW4NXGluQoLvhqFQM+6XSKD+P4XaB0=
+github.com/spf13/pflag v1.0.9 h1:9exaQaMOCwffKiiiYk6/BndUBv+iRViNW+4lEMi0PvY=
+github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
@@ -351,6 +361,7 @@ google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

main.go

@@ -7,7 +7,7 @@ import (
 )
 
 func main() {
-	if err := cmd.Run(); err != nil {
-		slog.Error("failed to run command", "err", err)
+	if err := cmd.Execute(); err != nil {
+		slog.Error("failed to execute command", "err", err)
 	}
 }