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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| // Example of use of the flags package. | ||
| package flags_test | ||
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| import ( | ||
| flags "github.com/jessevdk/go-flags" | ||
| "os" | ||
| "fmt" | ||
| "strings" | ||
| "os/exec" | ||
| ) | ||
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| func Example() { | ||
| var opts struct { | ||
| // Slice of bool will append 'true' each time the option | ||
| // is encountered (can be set multiple times, like -vvv) | ||
| Verbose []bool `short:"v" long:"verbose" description:"Show verbose debug information"` | ||
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| // Example of automatic marshalling to desired type (uint) | ||
| Offset uint `long:"offset" description:"Offset"` | ||
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| // Example of a callback, called each time the option is found. | ||
| Call func(string) `short:"c" description:"Call phone number"` | ||
| } | ||
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| // Callback which will invoke callto:<argument> to call a number. | ||
| // Note that this works just on OS X (and probably only with | ||
| // Skype) but it shows the idea. | ||
| opts.Call = func(num string) { | ||
| cmd := exec.Command("open", "callto:" + num) | ||
| cmd.Start() | ||
| cmd.Process.Release() | ||
| } | ||
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| // Create a new parser | ||
| parser := flags.NewParser() | ||
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| // Add the standard help group to the parser | ||
| parser.AddHelp(os.Stderr) | ||
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| // Add a new group for our own options. Note that we need to pass | ||
| // opts by reference (as a pointer) to allow the parser to set | ||
| // the fields values when needed. | ||
| parser.AddGroup("Application Options", &opts) | ||
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| // Finally, parse the command line arguments (uses os.Args by | ||
| // default). The resulting args are the remaining unparsed command | ||
| // line arguments. err will be set if there was a problem while | ||
| // parsing the command line options. It will take the special | ||
| // value flags.ErrHelp if the standard help was shown. | ||
| args, err := parser.Parse() | ||
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| if err != nil { | ||
| if err != flags.ErrHelp { | ||
| parser.PrintError(os.Stderr, err) | ||
| } | ||
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| os.Exit(1) | ||
| } | ||
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| fmt.Printf("Remaining args: %s\n", strings.Join(args, " ")) | ||
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| // Output: Remaining args: | ||
| } |
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