feat: add update cmd

config.go

@@ -48,7 +48,7 @@ func LoadConfig(path string) (result Config, err error) {
 		return
 	}
 
-	if err := json.Unmarshal(bytes, &result); err != nil {
+	if err = json.Unmarshal(bytes, &result); err != nil {
 		err = fmt.Errorf("failed to unmarshal: %w", err)
 		return
 	}

go.mod

@@ -5,7 +5,7 @@ go 1.15
 require (
 	github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect
 	github.com/fatih/color v1.10.0
-	github.com/haunt98/copy-go v0.1.0 // indirect
+	github.com/haunt98/copy-go v0.1.0
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/urfave/cli/v2 v2.3.0
 )

main.go

@@ -27,12 +27,14 @@ func main() {
 			{
 				Name:    installCommand,
 				Aliases: []string{"i"},
-				Usage:   "install configs from dotfiles",
+				Usage:   "install user configs from dotfiles",
+				Action:  a.RunInstall,
 			},
 			{
 				Name:    updateCommand,
 				Aliases: []string{"u"},
-				Usage:   "update dotfiles from configs",
+				Usage:   "update dotfiles from user configs",
+				Action:  a.RunUpdate,
 			},
 		},
 		Flags: []cli.Flag{
@@ -78,6 +80,21 @@ func (a *action) RunInstall(c *cli.Context) error {
 	return nil
 }
 
+func (a *action) RunUpdate(c *cli.Context) error {
+	a.getFlags(c)
+
+	cfg, err := LoadConfig(a.flags.path)
+	if err != nil {
+		return fmt.Errorf("failed to load config: %w", err)
+	}
+
+	if err := cfg.Update(); err != nil {
+		return fmt.Errorf("failed to update config: %w", err)
+	}
+
+	return nil
+}
+
 func (a *action) getFlags(c *cli.Context) {
 	a.flags.path = c.String(pathFlag)
 }