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