vendor: Add github.com/AudriusButkevicius/cli
This commit is contained in:
Jakob Borg
parent
81a9d7f2b9
commit
9fdaa637a8
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@ -0,0 +1,21 @@
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Copyright (C) 2013 Jeremy Saenz
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All Rights Reserved.
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MIT LICENSE
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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package cli
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import (
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"fmt"
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"io/ioutil"
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"os"
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"time"
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)
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// App is the main structure of a cli application. It is recomended that
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// and app be created with the cli.NewApp() function
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type App struct {
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// The name of the program. Defaults to os.Args[0]
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Name string
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// Description of the program.
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Usage string
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// Version of the program
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Version string
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// List of commands to execute
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Commands []Command
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// List of flags to parse
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Flags []Flag
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// Boolean to enable bash completion commands
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EnableBashCompletion bool
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// Boolean to hide built-in help command
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HideHelp bool
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// An action to execute when the bash-completion flag is set
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BashComplete func(context *Context)
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// An action to execute before any subcommands are run, but after the context is ready
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// If a non-nil error is returned, no subcommands are run
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Before func(context *Context) error
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// The action to execute when no subcommands are specified
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Action func(context *Context)
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// Execute this function if the proper command cannot be found
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CommandNotFound func(context *Context, command string)
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// Compilation date
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Compiled time.Time
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// Author
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Author string
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// Author e-mail
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Email string
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// Command argument requirements
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Requires *Requires
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}
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// Tries to find out when this binary was compiled.
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// Returns the current time if it fails to find it.
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func compileTime() time.Time {
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info, err := os.Stat(os.Args[0])
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if err != nil {
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return time.Now()
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}
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return info.ModTime()
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}
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// Creates a new cli Application with some reasonable defaults for Name, Usage, Version and Action.
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func NewApp() *App {
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return &App{
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Name: os.Args[0],
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Usage: "A new cli application",
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Version: "0.0.0",
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BashComplete: DefaultAppComplete,
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Action: helpCommand.Action,
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Compiled: compileTime(),
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}
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}
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// Entry point to the cli app. Parses the arguments slice and routes to the proper flag/args combination
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func (a *App) Run(arguments []string) error {
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// append help to commands
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if a.Command(helpCommand.Name) == nil && !a.HideHelp {
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a.Commands = append(a.Commands, helpCommand)
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a.appendFlag(HelpFlag)
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}
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//append version/help flags
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if a.EnableBashCompletion {
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a.appendFlag(BashCompletionFlag)
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}
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a.appendFlag(VersionFlag)
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// parse flags
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set := flagSet(a.Name, a.Flags)
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set.SetOutput(ioutil.Discard)
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err := set.Parse(arguments[1:])
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nerr := normalizeFlags(a.Flags, set)
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if nerr != nil {
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fmt.Println(nerr)
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context := NewContext(a, set, set)
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ShowAppHelp(context)
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fmt.Println("")
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return nerr
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}
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context := NewContext(a, set, set)
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if err != nil {
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fmt.Printf("Incorrect Usage.\n\n")
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ShowAppHelp(context)
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fmt.Println("")
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return err
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}
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if checkCompletions(context) {
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return nil
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}
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if checkHelp(context) {
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return nil
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}
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if checkVersion(context) {
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return nil
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}
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if err := context.Satisfies(a.Requires); err != nil {
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return err
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}
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if a.Before != nil {
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err := a.Before(context)
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if err != nil {
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return err
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}
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}
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args := context.Args()
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if args.Present() {
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name := args.First()
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c := a.Command(name)
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if c != nil {
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return c.Run(context)
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}
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}
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// Run default Action
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a.Action(context)
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return nil
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}
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// Another entry point to the cli app, takes care of passing arguments and error handling
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func (a *App) RunAndExitOnError() {
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if err := a.Run(os.Args); err != nil {
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os.Stderr.WriteString(fmt.Sprintln(err))
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os.Exit(1)
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}
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}
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// Invokes the subcommand given the context, parses ctx.Args() to generate command-specific flags
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func (a *App) RunAsSubcommand(ctx *Context) error {
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// append help to commands
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if len(a.Commands) > 0 {
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if a.Command(helpCommand.Name) == nil && !a.HideHelp {
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a.Commands = append(a.Commands, helpCommand)
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a.appendFlag(HelpFlag)
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}
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}
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// append flags
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if a.EnableBashCompletion {
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a.appendFlag(BashCompletionFlag)
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}
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// parse flags
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set := flagSet(a.Name, a.Flags)
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set.SetOutput(ioutil.Discard)
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err := set.Parse(ctx.Args().Tail())
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nerr := normalizeFlags(a.Flags, set)
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context := NewContext(a, set, ctx.globalSet)
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if nerr != nil {
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fmt.Println(nerr)
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if len(a.Commands) > 0 {
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ShowSubcommandHelp(context)
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} else {
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ShowCommandHelp(ctx, context.Args().First())
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}
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fmt.Println("")
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return nerr
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}
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if err != nil {
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fmt.Printf("Incorrect Usage.\n\n")
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ShowSubcommandHelp(context)
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return err
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}
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if checkCompletions(context) {
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return nil
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}
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if len(a.Commands) > 0 {
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if checkSubcommandHelp(context) {
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return nil
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}
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} else {
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if checkCommandHelp(ctx, context.Args().First()) {
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return nil
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}
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}
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if err := context.Satisfies(a.Requires); err != nil {
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return err
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}
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if a.Before != nil {
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err := a.Before(context)
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if err != nil {
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return err
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}
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}
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args := context.Args()
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if args.Present() {
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name := args.First()
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c := a.Command(name)
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if c != nil {
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return c.Run(context)
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}
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}
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// Run default Action
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if len(a.Commands) > 0 {
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a.Action(context)
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} else {
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a.Action(ctx)
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}
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return nil
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}
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// Returns the named command on App. Returns nil if the command does not exist
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func (a *App) Command(name string) *Command {
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for _, c := range a.Commands {
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if c.HasName(name) {
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return &c
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}
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}
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return nil
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}
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func (a *App) hasFlag(flag Flag) bool {
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for _, f := range a.Flags {
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if flag == f {
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return true
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}
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}
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return false
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}
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func (a *App) appendFlag(flag Flag) {
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if !a.hasFlag(flag) {
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a.Flags = append(a.Flags, flag)
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}
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}
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// Package cli provides a minimal framework for creating and organizing command line
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// Go applications. cli is designed to be easy to understand and write, the most simple
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// cli application can be written as follows:
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// func main() {
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// cli.NewApp().Run(os.Args)
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// }
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//
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// Of course this application does not do much, so let's make this an actual application:
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// func main() {
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// app := cli.NewApp()
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// app.Name = "greet"
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// app.Usage = "say a greeting"
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// app.Action = func(c *cli.Context) {
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// println("Greetings")
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// }
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//
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// app.Run(os.Args)
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// }
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package cli
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@ -0,0 +1,148 @@
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package cli
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import (
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"fmt"
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"io/ioutil"
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"strings"
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)
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// Command is a subcommand for a cli.App.
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type Command struct {
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// The name of the command
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Name string
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// short name of the command. Typically one character
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ShortName string
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// A short description of the usage of this command
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Usage string
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// A longer explanation of how the command works
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Description string
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// The function to call when checking for bash command completions
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BashComplete func(context *Context)
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// An action to execute before any sub-subcommands are run, but after the context is ready
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// If a non-nil error is returned, no sub-subcommands are run
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Before func(context *Context) error
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// The function to call when this command is invoked
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Action func(context *Context)
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// List of child commands
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Subcommands []Command
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// List of flags to parse
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Flags []Flag
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// Treat all flags as normal arguments if true
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SkipFlagParsing bool
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// Boolean to hide built-in help command
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HideHelp bool
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// Command argument requirements
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Requires *Requires
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}
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// Invokes the command given the context, parses ctx.Args() to generate command-specific flags
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func (c Command) Run(ctx *Context) error {
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if len(c.Subcommands) > 0 || c.Before != nil {
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return c.startApp(ctx)
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}
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if !c.HideHelp {
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// append help to flags
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c.Flags = append(
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c.Flags,
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HelpFlag,
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)
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}
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if ctx.App.EnableBashCompletion {
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c.Flags = append(c.Flags, BashCompletionFlag)
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}
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set := flagSet(c.Name, c.Flags)
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set.SetOutput(ioutil.Discard)
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firstFlagIndex := -1
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for index, arg := range ctx.Args() {
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if strings.HasPrefix(arg, "-") {
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firstFlagIndex = index
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break
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}
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}
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var err error
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if firstFlagIndex > -1 && !c.SkipFlagParsing {
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args := ctx.Args()
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regularArgs := args[1:firstFlagIndex]
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flagArgs := args[firstFlagIndex:]
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err = set.Parse(append(flagArgs, regularArgs...))
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} else {
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err = set.Parse(ctx.Args().Tail())
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}
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if err != nil {
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fmt.Printf("Incorrect Usage.\n\n")
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ShowCommandHelp(ctx, c.Name)
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fmt.Println("")
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return err
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}
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nerr := normalizeFlags(c.Flags, set)
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if nerr != nil {
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fmt.Println(nerr)
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fmt.Println("")
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ShowCommandHelp(ctx, c.Name)
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fmt.Println("")
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return nerr
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}
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context := NewContext(ctx.App, set, ctx.globalSet)
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if checkCommandCompletions(context, c.Name) {
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return nil
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}
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if checkCommandHelp(context, c.Name) {
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return nil
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}
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if err := context.Satisfies(c.Requires); err != nil {
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return err
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}
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context.Command = c
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c.Action(context)
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return nil
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}
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// Returns true if Command.Name or Command.ShortName matches given name
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func (c Command) HasName(name string) bool {
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return c.Name == name || c.ShortName == name
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}
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func (c Command) startApp(ctx *Context) error {
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app := NewApp()
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// set the name and usage
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app.Name = fmt.Sprintf("%s %s", ctx.App.Name, c.Name)
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if c.Description != "" {
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app.Usage = c.Description
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} else {
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app.Usage = c.Usage
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}
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// set the flags and commands
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app.Commands = c.Subcommands
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app.Flags = c.Flags
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app.HideHelp = c.HideHelp
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// bash completion
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app.EnableBashCompletion = ctx.App.EnableBashCompletion
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if c.BashComplete != nil {
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app.BashComplete = c.BashComplete
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}
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// set the actions
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app.Before = c.Before
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if c.Action != nil {
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app.Action = c.Action
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} else {
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app.Action = helpSubcommand.Action
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}
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return app.RunAsSubcommand(ctx)
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}
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@ -0,0 +1,345 @@
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package cli
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import (
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"errors"
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"flag"
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"fmt"
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"strconv"
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"strings"
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)
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// Context is a type that is passed through to
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// each Handler action in a cli application. Context
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// can be used to retrieve context-specific Args and
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// parsed command-line options.
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type Context struct {
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App *App
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Command Command
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flagSet *flag.FlagSet
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globalSet *flag.FlagSet
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setFlags map[string]bool
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}
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type Requires []string
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// Creates a new context. For use in when invoking an App or Command action.
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func NewContext(app *App, set *flag.FlagSet, globalSet *flag.FlagSet) *Context {
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return &Context{App: app, flagSet: set, globalSet: globalSet}
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}
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// Looks up the value of a local int flag, returns 0 if no int flag exists
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func (c *Context) Int(name string) int {
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return lookupInt(name, c.flagSet)
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}
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// Looks up the value of a local float64 flag, returns 0 if no float64 flag exists
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func (c *Context) Float64(name string) float64 {
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return lookupFloat64(name, c.flagSet)
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}
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// Looks up the value of a local bool flag, returns false if no bool flag exists
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func (c *Context) Bool(name string) bool {
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return lookupBool(name, c.flagSet)
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}
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// Looks up the value of a local boolT flag, returns false if no bool flag exists
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func (c *Context) BoolT(name string) bool {
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return lookupBoolT(name, c.flagSet)
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}
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// Looks up the value of a local string flag, returns "" if no string flag exists
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func (c *Context) String(name string) string {
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return lookupString(name, c.flagSet)
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}
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// Looks up the value of a local string slice flag, returns nil if no string slice flag exists
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func (c *Context) StringSlice(name string) []string {
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return lookupStringSlice(name, c.flagSet)
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}
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// Looks up the value of a local int slice flag, returns nil if no int slice flag exists
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func (c *Context) IntSlice(name string) []int {
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return lookupIntSlice(name, c.flagSet)
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}
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// Looks up the value of a local generic flag, returns nil if no generic flag exists
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func (c *Context) Generic(name string) interface{} {
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return lookupGeneric(name, c.flagSet)
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}
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// Looks up the value of a global int flag, returns 0 if no int flag exists
|
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func (c *Context) GlobalInt(name string) int {
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return lookupInt(name, c.globalSet)
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}
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// Looks up the value of a global bool flag, returns false if no bool flag exists
|
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func (c *Context) GlobalBool(name string) bool {
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return lookupBool(name, c.globalSet)
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}
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// Looks up the value of a global string flag, returns "" if no string flag exists
|
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func (c *Context) GlobalString(name string) string {
|
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return lookupString(name, c.globalSet)
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}
|
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// Looks up the value of a global string slice flag, returns nil if no string slice flag exists
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func (c *Context) GlobalStringSlice(name string) []string {
|
||||
return lookupStringSlice(name, c.globalSet)
|
||||
}
|
||||
|
||||
// Looks up the value of a global int slice flag, returns nil if no int slice flag exists
|
||||
func (c *Context) GlobalIntSlice(name string) []int {
|
||||
return lookupIntSlice(name, c.globalSet)
|
||||
}
|
||||
|
||||
// Looks up the value of a global generic flag, returns nil if no generic flag exists
|
||||
func (c *Context) GlobalGeneric(name string) interface{} {
|
||||
return lookupGeneric(name, c.globalSet)
|
||||
}
|
||||
|
||||
// Determines if the flag was actually set exists
|
||||
func (c *Context) IsSet(name string) bool {
|
||||
if c.setFlags == nil {
|
||||
c.setFlags = make(map[string]bool)
|
||||
c.flagSet.Visit(func(f *flag.Flag) {
|
||||
c.setFlags[f.Name] = true
|
||||
})
|
||||
}
|
||||
return c.setFlags[name] == true
|
||||
}
|
||||
|
||||
type Args []string
|
||||
|
||||
// Returns the command line arguments associated with the context.
|
||||
func (c *Context) Args() Args {
|
||||
args := Args(c.flagSet.Args())
|
||||
return args
|
||||
}
|
||||
|
||||
// Returns an error if the context arguments do not satisfy the given requirements
|
||||
func (c *Context) Satisfies(req *Requires) error {
|
||||
if req != nil {
|
||||
optional := 0
|
||||
unlimited := false
|
||||
clean_args := []string{}
|
||||
for _, arg := range *req {
|
||||
if strings.Contains(arg, "...") {
|
||||
unlimited = true
|
||||
arg = strings.Replace(arg, "...", "", -1) + "..."
|
||||
}
|
||||
if strings.Contains(arg, "?") {
|
||||
optional++
|
||||
arg = "[" + strings.Replace(arg, "?", "", -1) + "]"
|
||||
} else {
|
||||
arg = "<" + arg + ">"
|
||||
}
|
||||
clean_args = append(clean_args, arg)
|
||||
}
|
||||
exactly, nomore, atleast := 0, 0, 0
|
||||
if optional == 0 && !unlimited {
|
||||
exactly = len(*req)
|
||||
} else {
|
||||
atleast = len(*req) - optional
|
||||
if !unlimited {
|
||||
nomore = len(*req)
|
||||
}
|
||||
}
|
||||
|
||||
argc := len(c.Args())
|
||||
err := ""
|
||||
|
||||
if atleast > 0 || nomore > 0 {
|
||||
if atleast > argc {
|
||||
err = fmtRequiresError("atleast", atleast)
|
||||
} else if nomore > 0 && argc > nomore {
|
||||
err = fmtRequiresError("no more than", nomore)
|
||||
}
|
||||
} else if argc != exactly {
|
||||
err = fmtRequiresError("exactly", exactly)
|
||||
}
|
||||
if err != "" {
|
||||
if len(clean_args) > 0 {
|
||||
err += ": " + strings.Join(clean_args, " ")
|
||||
}
|
||||
return fmt.Errorf(err)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Returns the nth argument, or else a blank string
|
||||
func (a Args) Get(n int) string {
|
||||
if len(a) > n {
|
||||
return a[n]
|
||||
}
|
||||
return ""
|
||||
}
|
||||
|
||||
// Returns the first argument, or else a blank string
|
||||
func (a Args) First() string {
|
||||
return a.Get(0)
|
||||
}
|
||||
|
||||
// Return the rest of the arguments (not the first one)
|
||||
// or else an empty string slice
|
||||
func (a Args) Tail() []string {
|
||||
if len(a) >= 2 {
|
||||
return []string(a)[1:]
|
||||
}
|
||||
return []string{}
|
||||
}
|
||||
|
||||
// Checks if there are any arguments present
|
||||
func (a Args) Present() bool {
|
||||
return len(a) != 0
|
||||
}
|
||||
|
||||
// Swaps arguments at the given indexes
|
||||
func (a Args) Swap(from, to int) error {
|
||||
if from >= len(a) || to >= len(a) {
|
||||
return errors.New("index out of range")
|
||||
}
|
||||
a[from], a[to] = a[to], a[from]
|
||||
return nil
|
||||
}
|
||||
|
||||
// Formats the requirement error
|
||||
func fmtRequiresError(str string, count int) string {
|
||||
switch count {
|
||||
case 0:
|
||||
return "Command requires no arguments"
|
||||
case 1:
|
||||
return fmt.Sprintf("Command requires %s 1 argument", str)
|
||||
}
|
||||
return fmt.Sprintf("Command requires %s %d arguments", str, count)
|
||||
}
|
||||
|
||||
func lookupInt(name string, set *flag.FlagSet) int {
|
||||
f := set.Lookup(name)
|
||||
if f != nil {
|
||||
val, err := strconv.Atoi(f.Value.String())
|
||||
if err != nil {
|
||||
return 0
|
||||
}
|
||||
return val
|
||||
}
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
func lookupFloat64(name string, set *flag.FlagSet) float64 {
|
||||
f := set.Lookup(name)
|
||||
if f != nil {
|
||||
val, err := strconv.ParseFloat(f.Value.String(), 64)
|
||||
if err != nil {
|
||||
return 0
|
||||
}
|
||||
return val
|
||||
}
|
||||
|
||||
return 0
|
||||
}
|
||||
|
||||
func lookupString(name string, set *flag.FlagSet) string {
|
||||
f := set.Lookup(name)
|
||||
if f != nil {
|
||||
return f.Value.String()
|
||||
}
|
||||
|
||||
return ""
|
||||
}
|
||||
|
||||
func lookupStringSlice(name string, set *flag.FlagSet) []string {
|
||||
f := set.Lookup(name)
|
||||
if f != nil {
|
||||
return (f.Value.(*StringSlice)).Value()
|
||||
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func lookupIntSlice(name string, set *flag.FlagSet) []int {
|
||||
f := set.Lookup(name)
|
||||
if f != nil {
|
||||
return (f.Value.(*IntSlice)).Value()
|
||||
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func lookupGeneric(name string, set *flag.FlagSet) interface{} {
|
||||
f := set.Lookup(name)
|
||||
if f != nil {
|
||||
return f.Value
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func lookupBool(name string, set *flag.FlagSet) bool {
|
||||
f := set.Lookup(name)
|
||||
if f != nil {
|
||||
val, err := strconv.ParseBool(f.Value.String())
|
||||
if err != nil {
|
||||
return false
|
||||
}
|
||||
return val
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
func lookupBoolT(name string, set *flag.FlagSet) bool {
|
||||
f := set.Lookup(name)
|
||||
if f != nil {
|
||||
val, err := strconv.ParseBool(f.Value.String())
|
||||
if err != nil {
|
||||
return true
|
||||
}
|
||||
return val
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
func copyFlag(name string, ff *flag.Flag, set *flag.FlagSet) {
|
||||
switch ff.Value.(type) {
|
||||
case *StringSlice:
|
||||
default:
|
||||
set.Set(name, ff.Value.String())
|
||||
}
|
||||
}
|
||||
|
||||
func normalizeFlags(flags []Flag, set *flag.FlagSet) error {
|
||||
visited := make(map[string]bool)
|
||||
set.Visit(func(f *flag.Flag) {
|
||||
visited[f.Name] = true
|
||||
})
|
||||
for _, f := range flags {
|
||||
parts := strings.Split(f.getName(), ",")
|
||||
if len(parts) == 1 {
|
||||
continue
|
||||
}
|
||||
var ff *flag.Flag
|
||||
for _, name := range parts {
|
||||
name = strings.Trim(name, " ")
|
||||
if visited[name] {
|
||||
if ff != nil {
|
||||
return errors.New("Cannot use two forms of the same flag: " + name + " " + ff.Name)
|
||||
}
|
||||
ff = set.Lookup(name)
|
||||
}
|
||||
}
|
||||
if ff == nil {
|
||||
continue
|
||||
}
|
||||
for _, name := range parts {
|
||||
name = strings.Trim(name, " ")
|
||||
if !visited[name] {
|
||||
copyFlag(name, ff, set)
|
||||
}
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
|
@ -0,0 +1,379 @@
|
|||
package cli
|
||||
|
||||
import (
|
||||
"flag"
|
||||
"fmt"
|
||||
"os"
|
||||
"strconv"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// This flag enables bash-completion for all commands and subcommands
|
||||
var BashCompletionFlag = BoolFlag{
|
||||
Name: "generate-bash-completion",
|
||||
}
|
||||
|
||||
// This flag prints the version for the application
|
||||
var VersionFlag = BoolFlag{
|
||||
Name: "version, v",
|
||||
Usage: "print the version",
|
||||
}
|
||||
|
||||
// This flag prints the help for all commands and subcommands
|
||||
var HelpFlag = BoolFlag{
|
||||
Name: "help, h",
|
||||
Usage: "show help",
|
||||
}
|
||||
|
||||
// Flag is a common interface related to parsing flags in cli.
|
||||
// For more advanced flag parsing techniques, it is recomended that
|
||||
// this interface be implemented.
|
||||
type Flag interface {
|
||||
fmt.Stringer
|
||||
// Apply Flag settings to the given flag set
|
||||
Apply(*flag.FlagSet)
|
||||
getName() string
|
||||
}
|
||||
|
||||
func flagSet(name string, flags []Flag) *flag.FlagSet {
|
||||
set := flag.NewFlagSet(name, flag.ContinueOnError)
|
||||
|
||||
for _, f := range flags {
|
||||
f.Apply(set)
|
||||
}
|
||||
return set
|
||||
}
|
||||
|
||||
func eachName(longName string, fn func(string)) {
|
||||
parts := strings.Split(longName, ",")
|
||||
for _, name := range parts {
|
||||
name = strings.Trim(name, " ")
|
||||
fn(name)
|
||||
}
|
||||
}
|
||||
|
||||
// Generic is a generic parseable type identified by a specific flag
|
||||
type Generic interface {
|
||||
Set(value string) error
|
||||
String() string
|
||||
}
|
||||
|
||||
// GenericFlag is the flag type for types implementing Generic
|
||||
type GenericFlag struct {
|
||||
Name string
|
||||
Value Generic
|
||||
Usage string
|
||||
EnvVar string
|
||||
}
|
||||
|
||||
func (f GenericFlag) String() string {
|
||||
return withEnvHint(f.EnvVar, fmt.Sprintf("%s%s %v\t`%v` %s", prefixFor(f.Name), f.Name, f.Value, "-"+f.Name+" option -"+f.Name+" option", f.Usage))
|
||||
}
|
||||
|
||||
func (f GenericFlag) Apply(set *flag.FlagSet) {
|
||||
val := f.Value
|
||||
if f.EnvVar != "" {
|
||||
if envVal := os.Getenv(f.EnvVar); envVal != "" {
|
||||
val.Set(envVal)
|
||||
}
|
||||
}
|
||||
|
||||
eachName(f.Name, func(name string) {
|
||||
set.Var(f.Value, name, f.Usage)
|
||||
})
|
||||
}
|
||||
|
||||
func (f GenericFlag) getName() string {
|
||||
return f.Name
|
||||
}
|
||||
|
||||
type StringSlice []string
|
||||
|
||||
func (f *StringSlice) Set(value string) error {
|
||||
*f = append(*f, value)
|
||||
return nil
|
||||
}
|
||||
|
||||
func (f *StringSlice) String() string {
|
||||
return fmt.Sprintf("%s", *f)
|
||||
}
|
||||
|
||||
func (f *StringSlice) Value() []string {
|
||||
return *f
|
||||
}
|
||||
|
||||
type StringSliceFlag struct {
|
||||
Name string
|
||||
Value *StringSlice
|
||||
Usage string
|
||||
EnvVar string
|
||||
}
|
||||
|
||||
func (f StringSliceFlag) String() string {
|
||||
firstName := strings.Trim(strings.Split(f.Name, ",")[0], " ")
|
||||
pref := prefixFor(firstName)
|
||||
return withEnvHint(f.EnvVar, fmt.Sprintf("%s '%v'\t%v", prefixedNames(f.Name), pref+firstName+" option "+pref+firstName+" option", f.Usage))
|
||||
}
|
||||
|
||||
func (f StringSliceFlag) Apply(set *flag.FlagSet) {
|
||||
if f.EnvVar != "" {
|
||||
if envVal := os.Getenv(f.EnvVar); envVal != "" {
|
||||
newVal := &StringSlice{}
|
||||
for _, s := range strings.Split(envVal, ",") {
|
||||
newVal.Set(s)
|
||||
}
|
||||
f.Value = newVal
|
||||
}
|
||||
}
|
||||
|
||||
eachName(f.Name, func(name string) {
|
||||
set.Var(f.Value, name, f.Usage)
|
||||
})
|
||||
}
|
||||
|
||||
func (f StringSliceFlag) getName() string {
|
||||
return f.Name
|
||||
}
|
||||
|
||||
type IntSlice []int
|
||||
|
||||
func (f *IntSlice) Set(value string) error {
|
||||
|
||||
tmp, err := strconv.Atoi(value)
|
||||
if err != nil {
|
||||
return err
|
||||
} else {
|
||||
*f = append(*f, tmp)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (f *IntSlice) String() string {
|
||||
return fmt.Sprintf("%d", *f)
|
||||
}
|
||||
|
||||
func (f *IntSlice) Value() []int {
|
||||
return *f
|
||||
}
|
||||
|
||||
type IntSliceFlag struct {
|
||||
Name string
|
||||
Value *IntSlice
|
||||
Usage string
|
||||
EnvVar string
|
||||
}
|
||||
|
||||
func (f IntSliceFlag) String() string {
|
||||
firstName := strings.Trim(strings.Split(f.Name, ",")[0], " ")
|
||||
pref := prefixFor(firstName)
|
||||
return withEnvHint(f.EnvVar, fmt.Sprintf("%s '%v'\t%v", prefixedNames(f.Name), pref+firstName+" option "+pref+firstName+" option", f.Usage))
|
||||
}
|
||||
|
||||
func (f IntSliceFlag) Apply(set *flag.FlagSet) {
|
||||
if f.EnvVar != "" {
|
||||
if envVal := os.Getenv(f.EnvVar); envVal != "" {
|
||||
newVal := &IntSlice{}
|
||||
for _, s := range strings.Split(envVal, ",") {
|
||||
err := newVal.Set(s)
|
||||
if err != nil {
|
||||
fmt.Fprintf(os.Stderr, err.Error())
|
||||
}
|
||||
}
|
||||
f.Value = newVal
|
||||
}
|
||||
}
|
||||
|
||||
eachName(f.Name, func(name string) {
|
||||
set.Var(f.Value, name, f.Usage)
|
||||
})
|
||||
}
|
||||
|
||||
func (f IntSliceFlag) getName() string {
|
||||
return f.Name
|
||||
}
|
||||
|
||||
type BoolFlag struct {
|
||||
Name string
|
||||
Usage string
|
||||
EnvVar string
|
||||
}
|
||||
|
||||
func (f BoolFlag) String() string {
|
||||
return withEnvHint(f.EnvVar, fmt.Sprintf("%s\t%v", prefixedNames(f.Name), f.Usage))
|
||||
}
|
||||
|
||||
func (f BoolFlag) Apply(set *flag.FlagSet) {
|
||||
val := false
|
||||
if f.EnvVar != "" {
|
||||
if envVal := os.Getenv(f.EnvVar); envVal != "" {
|
||||
envValBool, err := strconv.ParseBool(envVal)
|
||||
if err == nil {
|
||||
val = envValBool
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
eachName(f.Name, func(name string) {
|
||||
set.Bool(name, val, f.Usage)
|
||||
})
|
||||
}
|
||||
|
||||
func (f BoolFlag) getName() string {
|
||||
return f.Name
|
||||
}
|
||||
|
||||
type BoolTFlag struct {
|
||||
Name string
|
||||
Usage string
|
||||
EnvVar string
|
||||
}
|
||||
|
||||
func (f BoolTFlag) String() string {
|
||||
return withEnvHint(f.EnvVar, fmt.Sprintf("%s\t%v", prefixedNames(f.Name), f.Usage))
|
||||
}
|
||||
|
||||
func (f BoolTFlag) Apply(set *flag.FlagSet) {
|
||||
val := true
|
||||
if f.EnvVar != "" {
|
||||
if envVal := os.Getenv(f.EnvVar); envVal != "" {
|
||||
envValBool, err := strconv.ParseBool(envVal)
|
||||
if err == nil {
|
||||
val = envValBool
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
eachName(f.Name, func(name string) {
|
||||
set.Bool(name, val, f.Usage)
|
||||
})
|
||||
}
|
||||
|
||||
func (f BoolTFlag) getName() string {
|
||||
return f.Name
|
||||
}
|
||||
|
||||
type StringFlag struct {
|
||||
Name string
|
||||
Value string
|
||||
Usage string
|
||||
EnvVar string
|
||||
}
|
||||
|
||||
func (f StringFlag) String() string {
|
||||
var fmtString string
|
||||
fmtString = "%s %v\t%v"
|
||||
|
||||
if len(f.Value) > 0 {
|
||||
fmtString = "%s '%v'\t%v"
|
||||
} else {
|
||||
fmtString = "%s %v\t%v"
|
||||
}
|
||||
|
||||
return withEnvHint(f.EnvVar, fmt.Sprintf(fmtString, prefixedNames(f.Name), f.Value, f.Usage))
|
||||
}
|
||||
|
||||
func (f StringFlag) Apply(set *flag.FlagSet) {
|
||||
if f.EnvVar != "" {
|
||||
if envVal := os.Getenv(f.EnvVar); envVal != "" {
|
||||
f.Value = envVal
|
||||
}
|
||||
}
|
||||
|
||||
eachName(f.Name, func(name string) {
|
||||
set.String(name, f.Value, f.Usage)
|
||||
})
|
||||
}
|
||||
|
||||
func (f StringFlag) getName() string {
|
||||
return f.Name
|
||||
}
|
||||
|
||||
type IntFlag struct {
|
||||
Name string
|
||||
Value int
|
||||
Usage string
|
||||
EnvVar string
|
||||
}
|
||||
|
||||
func (f IntFlag) String() string {
|
||||
return withEnvHint(f.EnvVar, fmt.Sprintf("%s '%v'\t%v", prefixedNames(f.Name), f.Value, f.Usage))
|
||||
}
|
||||
|
||||
func (f IntFlag) Apply(set *flag.FlagSet) {
|
||||
if f.EnvVar != "" {
|
||||
if envVal := os.Getenv(f.EnvVar); envVal != "" {
|
||||
envValInt, err := strconv.ParseUint(envVal, 10, 64)
|
||||
if err == nil {
|
||||
f.Value = int(envValInt)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
eachName(f.Name, func(name string) {
|
||||
set.Int(name, f.Value, f.Usage)
|
||||
})
|
||||
}
|
||||
|
||||
func (f IntFlag) getName() string {
|
||||
return f.Name
|
||||
}
|
||||
|
||||
type Float64Flag struct {
|
||||
Name string
|
||||
Value float64
|
||||
Usage string
|
||||
EnvVar string
|
||||
}
|
||||
|
||||
func (f Float64Flag) String() string {
|
||||
return withEnvHint(f.EnvVar, fmt.Sprintf("%s '%v'\t%v", prefixedNames(f.Name), f.Value, f.Usage))
|
||||
}
|
||||
|
||||
func (f Float64Flag) Apply(set *flag.FlagSet) {
|
||||
if f.EnvVar != "" {
|
||||
if envVal := os.Getenv(f.EnvVar); envVal != "" {
|
||||
envValFloat, err := strconv.ParseFloat(envVal, 10)
|
||||
if err == nil {
|
||||
f.Value = float64(envValFloat)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
eachName(f.Name, func(name string) {
|
||||
set.Float64(name, f.Value, f.Usage)
|
||||
})
|
||||
}
|
||||
|
||||
func (f Float64Flag) getName() string {
|
||||
return f.Name
|
||||
}
|
||||
|
||||
func prefixFor(name string) (prefix string) {
|
||||
if len(name) == 1 {
|
||||
prefix = "-"
|
||||
} else {
|
||||
prefix = "--"
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
func prefixedNames(fullName string) (prefixed string) {
|
||||
parts := strings.Split(fullName, ",")
|
||||
for i, name := range parts {
|
||||
name = strings.Trim(name, " ")
|
||||
prefixed += prefixFor(name) + name
|
||||
if i < len(parts)-1 {
|
||||
prefixed += ", "
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func withEnvHint(envVar, str string) string {
|
||||
envText := ""
|
||||
if envVar != "" {
|
||||
envText = fmt.Sprintf(" [$%s]", envVar)
|
||||
}
|
||||
return str + envText
|
||||
}
|
||||
|
|
@ -0,0 +1,217 @@
|
|||
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}} {{if .Flags}}[global options] {{end}}command{{if .Flags}} [command options]{{end}} [arguments...]
|
||||
|
||||
VERSION:
|
||||
{{.Version}}{{if or .Author .Email}}
|
||||
|
||||
AUTHOR:{{if .Author}}
|
||||
{{.Author}}{{if .Email}} - <{{.Email}}>{{end}}{{else}}
|
||||
{{.Email}}{{end}}{{end}}
|
||||
|
||||
COMMANDS:
|
||||
{{range .Commands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
|
||||
{{end}}{{if .Flags}}
|
||||
GLOBAL OPTIONS:
|
||||
{{range .Flags}}{{.}}
|
||||
{{end}}{{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}}{{if .Flags}} [command options]{{end}} [arguments...]{{if .Description}}
|
||||
|
||||
DESCRIPTION:
|
||||
{{.Description}}{{end}}{{if .Flags}}
|
||||
|
||||
OPTIONS:
|
||||
{{range .Flags}}{{.}}
|
||||
{{end}}{{ end }}
|
||||
`
|
||||
|
||||
// The text template for the subcommand help topic.
|
||||
// cli.go uses text/template to render templates. You can
|
||||
// render custom help text by setting this variable.
|
||||
var SubcommandHelpTemplate = `NAME:
|
||||
{{.Name}} - {{.Usage}}
|
||||
|
||||
USAGE:
|
||||
{{.Name}} command{{if .Flags}} [command options]{{end}} [arguments...]
|
||||
|
||||
COMMANDS:
|
||||
{{range .Commands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
|
||||
{{end}}{{if .Flags}}
|
||||
OPTIONS:
|
||||
{{range .Flags}}{{.}}
|
||||
{{end}}{{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)
|
||||
}
|
||||
},
|
||||
}
|
||||
|
||||
var helpSubcommand = 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 {
|
||||
ShowSubcommandHelp(c)
|
||||
}
|
||||
},
|
||||
}
|
||||
|
||||
// Prints help for the App
|
||||
var HelpPrinter = printHelp
|
||||
|
||||
func ShowAppHelp(c *Context) {
|
||||
HelpPrinter(AppHelpTemplate, c.App)
|
||||
}
|
||||
|
||||
// Prints the list of subcommands as the default app completion method
|
||||
func DefaultAppComplete(c *Context) {
|
||||
for _, command := range c.App.Commands {
|
||||
fmt.Println(command.Name)
|
||||
if command.ShortName != "" {
|
||||
fmt.Println(command.ShortName)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Prints help for the given command
|
||||
func ShowCommandHelp(c *Context, command string) {
|
||||
for _, c := range c.App.Commands {
|
||||
if c.HasName(command) {
|
||||
HelpPrinter(CommandHelpTemplate, c)
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
if c.App.CommandNotFound != nil {
|
||||
c.App.CommandNotFound(c, command)
|
||||
} else {
|
||||
fmt.Printf("No help topic for '%v'\n", command)
|
||||
}
|
||||
}
|
||||
|
||||
// Prints help for the given subcommand
|
||||
func ShowSubcommandHelp(c *Context) {
|
||||
HelpPrinter(SubcommandHelpTemplate, c.App)
|
||||
}
|
||||
|
||||
// Prints the version number of the App
|
||||
func ShowVersion(c *Context) {
|
||||
fmt.Printf("%v version %v\n", c.App.Name, c.App.Version)
|
||||
}
|
||||
|
||||
// Prints the lists of commands within a given context
|
||||
func ShowCompletions(c *Context) {
|
||||
a := c.App
|
||||
if a != nil && a.BashComplete != nil {
|
||||
a.BashComplete(c)
|
||||
}
|
||||
}
|
||||
|
||||
// Prints the custom completions for a given command
|
||||
func ShowCommandCompletions(ctx *Context, command string) {
|
||||
c := ctx.App.Command(command)
|
||||
if c != nil && c.BashComplete != nil {
|
||||
c.BashComplete(ctx)
|
||||
}
|
||||
}
|
||||
|
||||
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
|
||||
}
|
||||
|
||||
func checkSubcommandHelp(c *Context) bool {
|
||||
if c.GlobalBool("h") || c.GlobalBool("help") {
|
||||
ShowSubcommandHelp(c)
|
||||
return true
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
func checkCompletions(c *Context) bool {
|
||||
if c.GlobalBool(BashCompletionFlag.Name) && c.App.EnableBashCompletion {
|
||||
ShowCompletions(c)
|
||||
return true
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
||||
func checkCommandCompletions(c *Context, name string) bool {
|
||||
if c.Bool(BashCompletionFlag.Name) && c.App.EnableBashCompletion {
|
||||
ShowCommandCompletions(c, name)
|
||||
return true
|
||||
}
|
||||
|
||||
return false
|
||||
}
|
||||
|
|
@ -1,6 +1,14 @@
|
|||
{
|
||||
"version": 0,
|
||||
"dependencies": [
|
||||
{
|
||||
"importpath": "github.com/AudriusButkevicius/cli",
|
||||
"repository": "https://github.com/AudriusButkevicius/cli",
|
||||
"vcs": "git",
|
||||
"revision": "7f561c78b5a4aad858d9fd550c92b5da6d55efbb",
|
||||
"branch": "master",
|
||||
"notests": true
|
||||
},
|
||||
{
|
||||
"importpath": "github.com/AudriusButkevicius/go-nat-pmp",
|
||||
"repository": "https://github.com/AudriusButkevicius/go-nat-pmp",
|
||||
|
|
|
|||
Loading…
Reference in New Issue