120 lines
2.3 KiB
Go
120 lines
2.3 KiB
Go
package cli
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"text/tabwriter"
|
|
"text/template"
|
|
)
|
|
|
|
// The text template for the Default help topic.
|
|
// cli.go uses text/template to render templates. You can
|
|
// render custom help text by setting this variable.
|
|
var AppHelpTemplate = `NAME:
|
|
{{.Name}} - {{.Usage}}
|
|
|
|
USAGE:
|
|
{{.Name}} [global options] command [command options] [arguments...]
|
|
|
|
VERSION:
|
|
{{.Version}}
|
|
|
|
COMMANDS:
|
|
{{range .Commands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
|
|
{{end}}
|
|
GLOBAL OPTIONS:
|
|
{{range .Flags}}{{.}}
|
|
{{end}}
|
|
`
|
|
|
|
// The text template for the command help topic.
|
|
// cli.go uses text/template to render templates. You can
|
|
// render custom help text by setting this variable.
|
|
var CommandHelpTemplate = `NAME:
|
|
{{.Name}} - {{.Usage}}
|
|
|
|
USAGE:
|
|
command {{.Name}} [command options] [arguments...]
|
|
|
|
DESCRIPTION:
|
|
{{.Description}}
|
|
|
|
OPTIONS:
|
|
{{range .Flags}}{{.}}
|
|
{{end}}
|
|
`
|
|
|
|
var helpCommand = Command{
|
|
Name: "help",
|
|
ShortName: "h",
|
|
Usage: "Shows a list of commands or help for one command",
|
|
Action: func(c *Context) {
|
|
args := c.Args()
|
|
if args.Present() {
|
|
ShowCommandHelp(c, args.First())
|
|
} else {
|
|
ShowAppHelp(c)
|
|
}
|
|
},
|
|
}
|
|
|
|
// Prints help for the App
|
|
var HelpPrinter = printHelp
|
|
func ShowAppHelp(c *Context) {
|
|
HelpPrinter(AppHelpTemplate, c.App)
|
|
}
|
|
|
|
// Prints help for the given command
|
|
func ShowCommandHelp(c *Context, command string) {
|
|
for _, c := range c.App.Commands {
|
|
if c.HasName(command) {
|
|
printHelp(CommandHelpTemplate, c)
|
|
return
|
|
}
|
|
}
|
|
|
|
fmt.Printf("No help topic for '%v'\n", command)
|
|
}
|
|
|
|
// Prints the version number of the App
|
|
func ShowVersion(c *Context) {
|
|
fmt.Printf("%v version %v\n", c.App.Name, c.App.Version)
|
|
}
|
|
|
|
func printHelp(templ string, data interface{}) {
|
|
w := tabwriter.NewWriter(os.Stdout, 0, 8, 1, '\t', 0)
|
|
t := template.Must(template.New("help").Parse(templ))
|
|
err := t.Execute(w, data)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
w.Flush()
|
|
}
|
|
|
|
func checkVersion(c *Context) bool {
|
|
if c.GlobalBool("version") {
|
|
ShowVersion(c)
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func checkHelp(c *Context) bool {
|
|
if c.GlobalBool("h") || c.GlobalBool("help") {
|
|
ShowAppHelp(c)
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func checkCommandHelp(c *Context, name string) bool {
|
|
if c.Bool("h") || c.Bool("help") {
|
|
ShowCommandHelp(c, name)
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|