diff --git a/README.md b/README.md index 214e543..d0c3236 100644 --- a/README.md +++ b/README.md @@ -50,7 +50,9 @@ This app will run and show help text, but is not very useful. Let's give an acti package main import ( + "fmt" "os" + "github.com/codegangsta/cli" ) @@ -58,8 +60,9 @@ func main() { app := cli.NewApp() app.Name = "boom" app.Usage = "make an explosive entrance" - app.Action = func(c *cli.Context) { - println("boom! I say!") + app.Action = func(c *cli.Context) int { + fmt.Println("boom! I say!") + return 0 } app.Run(os.Args) @@ -78,7 +81,9 @@ Start by creating a directory named `greet`, and within it, add a file, `greet.g package main import ( + "fmt" "os" + "github.com/codegangsta/cli" ) @@ -86,8 +91,9 @@ func main() { app := cli.NewApp() app.Name = "greet" app.Usage = "fight the loneliness!" - app.Action = func(c *cli.Context) { - println("Hello friend!") + app.Action = func(c *cli.Context) int { + fmt.Println("Hello friend!") + return 0 } app.Run(os.Args) @@ -370,8 +376,9 @@ COMMANDS: ### Exit code -It is your responsibility to call `os.Exit` with the exit code returned by -`app.Run`, e.g.: +Calling `App.Run` will not automatically call `os.Exit`, which means that by +default the exit code will "fall through" to being `0`. Proper exit code +propagation is the responsibility of the code that calls `App.Run`, e.g.: ```go package main @@ -382,10 +389,7 @@ import ( ) func main() { - exitCode, err := cli.NewApp().Run(os.Args) - if err != nil { - log.Println(err) - } + exitCode, _ := cli.NewApp().Run(os.Args) os.Exit(exitCode) } ```