feat: add --verbose flag (#5)

* feat: add --verbose flag

* refactor: app run default RunHelp

* feat: add flags to action

* feat: add log verbose for all commands

Co-authored-by: Tran Hau <ngtranhau@gmail.com>

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"log"
 	"os"
 	"runtime"
 
@@ -11,15 +12,27 @@ import (
 
 const (
 	appName  = "dotfiles"
+	appUsage = "managing dotfiles"
 
+	// flags
+	verboseFlag = "verbose"
+
+	// commands
 	installCommand = "install"
 	updateCommand  = "update"
 	cleanCommand   = "clean"
 
+	// usages
+	verboseUsage = "show what is going on"
+	installUsage = "install user configs from dotfiles"
+	updateUsage  = "update dotfiles from user configs"
+	cleanUsage   = "clean unused dotfiles"
+
 	currentDir = "."
 )
 
 var (
+	// aliases
 	installAliases = []string{"i"}
 	updateAliases  = []string{"u"}
 	cleanAliases   = []string{"c"}
@@ -42,28 +55,34 @@ func main() {
 
 	app := &cli.App{
 		Name:  appName,
-		Usage: "managing dotfiles",
+		Usage: appUsage,
 		Commands: []*cli.Command{
 			{
 				Name:    installCommand,
 				Aliases: installAliases,
-				Usage:   "install user configs from dotfiles",
+				Usage:   installUsage,
+				Flags: []cli.Flag{
+					&cli.BoolFlag{
+						Name:  verboseFlag,
+						Usage: verboseUsage,
+					},
+				},
 				Action: a.RunInstall,
 			},
 			{
 				Name:    updateCommand,
 				Aliases: updateAliases,
-				Usage:   "update dotfiles from user configs",
+				Usage:   updateUsage,
 				Action:  a.RunUpdate,
 			},
 			{
 				Name:    cleanCommand,
 				Aliases: cleanAliases,
-				Usage:   "clean unused dotfiles",
+				Usage:   cleanUsage,
 				Action:  a.RunClean,
 			},
 		},
-		Action: a.Run,
+		Action: a.RunHelp,
 	}
 
 	if err := app.Run(os.Args); err != nil {
@@ -71,18 +90,26 @@ func main() {
 	}
 }
 
-type action struct{}
+type action struct {
+	flags struct {
+		verbose bool
+	}
+}
 
 // Show help by default
-func (a *action) Run(c *cli.Context) error {
+func (a *action) RunHelp(c *cli.Context) error {
 	return cli.ShowAppHelp(c)
 }
 
 func (a *action) RunInstall(c *cli.Context) error {
+	a.getFlags(c)
+	a.log("start %s\n", installCommand)
+
 	cfg, err := LoadConfig(currentDir)
 	if err != nil {
 		return fmt.Errorf("failed to load config: %w", err)
 	}
+	a.log("config %+v\n", cfg)
 
 	if err := cfg.Install(); err != nil {
 		return fmt.Errorf("failed to install config: %w", err)
@@ -92,10 +119,14 @@ func (a *action) RunInstall(c *cli.Context) error {
 }
 
 func (a *action) RunUpdate(c *cli.Context) error {
+	a.getFlags(c)
+	a.log("start %s\n", updateCommand)
+
 	cfg, err := LoadConfig(currentDir)
 	if err != nil {
 		return fmt.Errorf("failed to load config: %w", err)
 	}
+	a.log("config %+v\n", cfg)
 
 	if err := cfg.Update(); err != nil {
 		return fmt.Errorf("failed to update config: %w", err)
@@ -105,10 +136,14 @@ func (a *action) RunUpdate(c *cli.Context) error {
 }
 
 func (a *action) RunClean(c *cli.Context) error {
+	a.getFlags(c)
+	a.log("start %s\n", cleanCommand)
+
 	cfg, err := LoadConfig(currentDir)
 	if err != nil {
 		return fmt.Errorf("failed to load config: %w", err)
 	}
+	a.log("config %+v\n", cfg)
 
 	if err := cfg.Clean(); err != nil {
 		return fmt.Errorf("failed to clean config: %w", err)
@@ -116,3 +151,13 @@ func (a *action) RunClean(c *cli.Context) error {
 
 	return nil
 }
+
+func (a *action) getFlags(c *cli.Context) {
+	a.flags.verbose = c.Bool(verboseFlag)
+}
+
+func (a *action) log(format string, v ...interface{}) {
+	if a.flags.verbose {
+		log.Printf(format, v...)
+	}
+}