Merge pull request #7 from fkautz/pr_out_adding_framework_for_cli_options

Adding framework for cli options

minio/main.go

@@ -1,10 +1,13 @@
 package main
 
 import (
+	"github.com/codegangsta/cli"
 	"github.com/minios/minios"
+	"os"
 )
 
 func main() {
+	cli.NewApp().Run(os.Args)
 	server := minio.Server{}
 	server.Start()
 }

third_party/src/github.com/codegangsta/cli/.travis.yml

@@ -0,0 +1,6 @@
+language: go
+go: 1.1
+
+script:
+- go vet ./...
+- go test -v ./...

third_party/src/github.com/codegangsta/cli/LICENSE

@@ -0,0 +1,21 @@
+Copyright (C) 2013 Jeremy Saenz
+All Rights Reserved.
+
+MIT LICENSE
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

third_party/src/github.com/codegangsta/cli/README.md

@@ -0,0 +1,287 @@
+[![Build Status](https://travis-ci.org/codegangsta/cli.png?branch=master)](https://travis-ci.org/codegangsta/cli)
+
+# cli.go
+cli.go is simple, fast, and fun package for building command line apps in Go. The goal is to enable developers to write fast and distributable command line applications in an expressive way.
+
+You can view the API docs here:
+http://godoc.org/github.com/codegangsta/cli
+
+## Overview
+Command line apps are usually so tiny that there is absolutely no reason why your code should *not* be self-documenting. Things like generating help text and parsing command flags/options should not hinder productivity when writing a command line app.
+
+**This is where cli.go comes into play.** cli.go makes command line programming fun, organized, and expressive!
+
+## Installation
+Make sure you have a working Go environment (go 1.1 is *required*). [See the install instructions](http://golang.org/doc/install.html).
+
+To install `cli.go`, simply run:
+```
+$ go get github.com/codegangsta/cli
+```
+
+Make sure your `PATH` includes to the `$GOPATH/bin` directory so your commands can be easily used:
+```
+export PATH=$PATH:$GOPATH/bin
+```
+
+## Getting Started
+One of the philosophies behind cli.go is that an API should be playful and full of discovery. So a cli.go app can be as little as one line of code in `main()`. 
+
+``` go
+package main
+
+import (
+  "os"
+  "github.com/codegangsta/cli"
+)
+
+func main() {
+  cli.NewApp().Run(os.Args)
+}
+```
+
+This app will run and show help text, but is not very useful. Let's give an action to execute and some help documentation:
+
+``` go
+package main
+
+import (
+  "os"
+  "github.com/codegangsta/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+  app.Name = "boom"
+  app.Usage = "make an explosive entrance"
+  app.Action = func(c *cli.Context) {
+    println("boom! I say!")
+  }
+  
+  app.Run(os.Args)
+}
+```
+
+Running this already gives you a ton of functionality, plus support for things like subcommands and flags, which are covered below.
+
+## Example
+
+Being a programmer can be a lonely job. Thankfully by the power of automation that is not the case! Let's create a greeter app to fend off our demons of loneliness!
+
+``` go
+/* greet.go */
+package main
+
+import (
+  "os"
+  "github.com/codegangsta/cli"
+)
+
+func main() {
+  app := cli.NewApp()
+  app.Name = "greet"
+  app.Usage = "fight the loneliness!"
+  app.Action = func(c *cli.Context) {
+    println("Hello friend!")
+  }
+  
+  app.Run(os.Args)
+}
+```
+
+Install our command to the `$GOPATH/bin` directory:
+
+```
+$ go install
+```
+
+Finally run our new command:
+
+```
+$ greet
+Hello friend!
+```
+
+cli.go also generates some bitchass help text:
+```
+$ greet help
+NAME:
+    greet - fight the loneliness!
+
+USAGE:
+    greet [global options] command [command options] [arguments...]
+
+VERSION:
+    0.0.0
+
+COMMANDS:
+    help, h  Shows a list of commands or help for one command
+
+GLOBAL OPTIONS
+    --version	Shows version information
+```
+
+### Arguments
+You can lookup arguments by calling the `Args` function on `cli.Context`.
+
+``` go
+...
+app.Action = func(c *cli.Context) {
+  println("Hello", c.Args()[0])
+}
+...
+```
+
+### Flags
+Setting and querying flags is simple.
+``` go
+...
+app.Flags = []cli.Flag {
+  cli.StringFlag{
+    Name: "lang",
+    Value: "english",
+    Usage: "language for the greeting",
+  },
+}
+app.Action = func(c *cli.Context) {
+  name := "someone"
+  if len(c.Args()) > 0 {
+    name = c.Args()[0]
+  }
+  if c.String("lang") == "spanish" {
+    println("Hola", name)
+  } else {
+    println("Hello", name)
+  }
+}
+...
+```
+
+#### Alternate Names
+
+You can set alternate (or short) names for flags by providing a comma-delimited list for the `Name`. e.g.
+
+``` go
+app.Flags = []cli.Flag {
+  cli.StringFlag{
+    Name: "lang, l",
+    Value: "english",
+    Usage: "language for the greeting",
+  },
+}
+```
+
+#### Values from the Environment
+
+You can also have the default value set from the environment via `EnvVar`.  e.g.
+
+``` go
+app.Flags = []cli.Flag {
+  cli.StringFlag{
+    Name: "lang, l",
+    Value: "english",
+    Usage: "language for the greeting",
+    EnvVar: "APP_LANG",
+  },
+}
+```
+
+That flag can then be set with `--lang spanish` or `-l spanish`. Note that giving two different forms of the same flag in the same command invocation is an error.
+
+### Subcommands
+
+Subcommands can be defined for a more git-like command line app.
+```go
+...
+app.Commands = []cli.Command{
+  {
+    Name:      "add",
+    ShortName: "a",
+    Usage:     "add a task to the list",
+    Action: func(c *cli.Context) {
+      println("added task: ", c.Args().First())
+    },
+  },
+  {
+    Name:      "complete",
+    ShortName: "c",
+    Usage:     "complete a task on the list",
+    Action: func(c *cli.Context) {
+      println("completed task: ", c.Args().First())
+    },
+  },
+  {
+    Name:      "template",
+    ShortName: "r",
+    Usage:     "options for task templates",
+    Subcommands: []cli.Command{
+      {
+        Name:  "add",
+        Usage: "add a new template",
+        Action: func(c *cli.Context) {
+            println("new task template: ", c.Args().First())
+        },
+      },
+      {
+        Name:  "remove",
+        Usage: "remove an existing template",
+        Action: func(c *cli.Context) {
+          println("removed task template: ", c.Args().First())
+        },
+      },
+    },
+  },     
+}
+...
+```
+
+### Bash Completion
+
+You can enable completion commands by setting the `EnableBashCompletion`
+flag on the `App` object.  By default, this setting will only auto-complete to
+show an app's subcommands, but you can write your own completion methods for
+the App or its subcommands.
+```go
+...
+var tasks = []string{"cook", "clean", "laundry", "eat", "sleep", "code"}
+app := cli.NewApp()
+app.EnableBashCompletion = true
+app.Commands = []cli.Command{
+  {
+    Name: "complete",
+    ShortName: "c",
+    Usage: "complete a task on the list",
+    Action: func(c *cli.Context) {
+       println("completed task: ", c.Args().First())
+    },
+    BashComplete: func(c *cli.Context) {
+      // This will complete if no args are passed
+      if len(c.Args()) > 0 {
+        return
+      }
+      for _, t := range tasks {
+        fmt.Println(t)
+      }
+    },
+  }
+}
+...
+```
+
+#### To Enable
+
+Source the `autocomplete/bash_autocomplete` file in your `.bashrc` file while
+setting the `PROG` variable to the name of your program:
+
+`PROG=myprogram source /.../cli/autocomplete/bash_autocomplete`
+
+
+## Contribution Guidelines
+Feel free to put up a pull request to fix a bug or maybe add a feature. I will give it a code review and make sure that it does not break backwards compatibility. If I or any other collaborators agree that it is in line with the vision of the project, we will work with you to get the code into a mergeable state and merge it into the master branch.
+
+If you are have contributed something significant to the project, I will most likely add you as a collaborator. As a collaborator you are given the ability to merge others pull requests. It is very important that new code does not break existing code, so be careful about what code you do choose to merge. If you have any questions feel free to link @codegangsta to the issue in question and we can review it together.
+
+If you feel like you have contributed to the project but have not yet been added as a collaborator, I probably forgot to add you. Hit @codegangsta up over email and we will get it figured out.
+
+## About
+cli.go is written by none other than the [Code Gangsta](http://codegangsta.io)

third_party/src/github.com/codegangsta/cli/app.go

@@ -0,0 +1,246 @@
+package cli
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"time"
+)
+
+// App is the main structure of a cli application. It is recomended that
+// and app be created with the cli.NewApp() function
+type App struct {
+	// The name of the program. Defaults to os.Args[0]
+	Name string
+	// Description of the program.
+	Usage string
+	// Version of the program
+	Version string
+	// List of commands to execute
+	Commands []Command
+	// List of flags to parse
+	Flags []Flag
+	// Boolean to enable bash completion commands
+	EnableBashCompletion bool
+	// Boolean to hide built-in help command
+	HideHelp bool
+	// An action to execute when the bash-completion flag is set
+	BashComplete func(context *Context)
+	// An action to execute before any subcommands are run, but after the context is ready
+	// If a non-nil error is returned, no subcommands are run
+	Before func(context *Context) error
+	// The action to execute when no subcommands are specified
+	Action func(context *Context)
+	// Execute this function if the proper command cannot be found
+	CommandNotFound func(context *Context, command string)
+	// Compilation date
+	Compiled time.Time
+	// Author
+	Author string
+	// Author e-mail
+	Email string
+}
+
+// Tries to find out when this binary was compiled.
+// Returns the current time if it fails to find it.
+func compileTime() time.Time {
+	info, err := os.Stat(os.Args[0])
+	if err != nil {
+		return time.Now()
+	}
+	return info.ModTime()
+}
+
+// Creates a new cli Application with some reasonable defaults for Name, Usage, Version and Action.
+func NewApp() *App {
+	return &App{
+		Name:         os.Args[0],
+		Usage:        "A new cli application",
+		Version:      "0.0.0",
+		BashComplete: DefaultAppComplete,
+		Action:       helpCommand.Action,
+		Compiled:     compileTime(),
+	}
+}
+
+// Entry point to the cli app. Parses the arguments slice and routes to the proper flag/args combination
+func (a *App) Run(arguments []string) error {
+	// append help to commands
+	if a.Command(helpCommand.Name) == nil && !a.HideHelp {
+		a.Commands = append(a.Commands, helpCommand)
+		a.appendFlag(HelpFlag)
+	}
+
+	//append version/help flags
+	if a.EnableBashCompletion {
+		a.appendFlag(BashCompletionFlag)
+	}
+	a.appendFlag(VersionFlag)
+
+	// parse flags
+	set := flagSet(a.Name, a.Flags)
+	set.SetOutput(ioutil.Discard)
+	err := set.Parse(arguments[1:])
+	nerr := normalizeFlags(a.Flags, set)
+	if nerr != nil {
+		fmt.Println(nerr)
+		context := NewContext(a, set, set)
+		ShowAppHelp(context)
+		fmt.Println("")
+		return nerr
+	}
+	context := NewContext(a, set, set)
+
+	if err != nil {
+		fmt.Printf("Incorrect Usage.\n\n")
+		ShowAppHelp(context)
+		fmt.Println("")
+		return err
+	}
+
+	if checkCompletions(context) {
+		return nil
+	}
+
+	if checkHelp(context) {
+		return nil
+	}
+
+	if checkVersion(context) {
+		return nil
+	}
+
+	if a.Before != nil {
+		err := a.Before(context)
+		if err != nil {
+			return err
+		}
+	}
+
+	args := context.Args()
+	if args.Present() {
+		name := args.First()
+		c := a.Command(name)
+		if c != nil {
+			return c.Run(context)
+		}
+	}
+
+	// Run default Action
+	a.Action(context)
+	return nil
+}
+
+// Another entry point to the cli app, takes care of passing arguments and error handling
+func (a *App) RunAndExitOnError() {
+	if err := a.Run(os.Args); err != nil {
+		os.Stderr.WriteString(fmt.Sprintln(err))
+		os.Exit(1)
+	}
+}
+
+// Invokes the subcommand given the context, parses ctx.Args() to generate command-specific flags
+func (a *App) RunAsSubcommand(ctx *Context) error {
+	// append help to commands
+	if len(a.Commands) > 0 {
+		if a.Command(helpCommand.Name) == nil && !a.HideHelp {
+			a.Commands = append(a.Commands, helpCommand)
+			a.appendFlag(HelpFlag)
+		}
+	}
+
+	// append flags
+	if a.EnableBashCompletion {
+		a.appendFlag(BashCompletionFlag)
+	}
+
+	// parse flags
+	set := flagSet(a.Name, a.Flags)
+	set.SetOutput(ioutil.Discard)
+	err := set.Parse(ctx.Args().Tail())
+	nerr := normalizeFlags(a.Flags, set)
+	context := NewContext(a, set, ctx.globalSet)
+
+	if nerr != nil {
+		fmt.Println(nerr)
+		if len(a.Commands) > 0 {
+			ShowSubcommandHelp(context)
+		} else {
+			ShowCommandHelp(ctx, context.Args().First())
+		}
+		fmt.Println("")
+		return nerr
+	}
+
+	if err != nil {
+		fmt.Printf("Incorrect Usage.\n\n")
+		ShowSubcommandHelp(context)
+		return err
+	}
+
+	if checkCompletions(context) {
+		return nil
+	}
+
+	if len(a.Commands) > 0 {
+		if checkSubcommandHelp(context) {
+			return nil
+		}
+	} else {
+		if checkCommandHelp(ctx, context.Args().First()) {
+			return nil
+		}
+	}
+
+	if a.Before != nil {
+		err := a.Before(context)
+		if err != nil {
+			return err
+		}
+	}
+
+	args := context.Args()
+	if args.Present() {
+		name := args.First()
+		c := a.Command(name)
+		if c != nil {
+			return c.Run(context)
+		}
+	}
+
+	// Run default Action
+	if len(a.Commands) > 0 {
+		a.Action(context)
+	} else {
+		a.Action(ctx)
+	}
+
+	return nil
+}
+
+// Returns the named command on App. Returns nil if the command does not exist
+func (a *App) Command(name string) *Command {
+	for _, c := range a.Commands {
+		if c.HasName(name) {
+			return &c
+		}
+	}
+
+	return nil
+}
+
+func (a *App) hasFlag(flag Flag) bool {
+	for _, f := range a.Flags {
+		if flag == f {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (a *App) appendFlag(flag Flag) {
+	if !a.hasFlag(flag) {
+		a.Flags = append(a.Flags, flag)
+	}
+}

third_party/src/github.com/codegangsta/cli/app_test.go

@@ -0,0 +1,423 @@
+package cli_test
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/codegangsta/cli"
+)
+
+func ExampleApp() {
+	// set args for examples sake
+	os.Args = []string{"greet", "--name", "Jeremy"}
+
+	app := cli.NewApp()
+	app.Name = "greet"
+	app.Flags = []cli.Flag{
+		cli.StringFlag{Name: "name", Value: "bob", Usage: "a name to say"},
+	}
+	app.Action = func(c *cli.Context) {
+		fmt.Printf("Hello %v\n", c.String("name"))
+	}
+	app.Run(os.Args)
+	// Output:
+	// Hello Jeremy
+}
+
+func ExampleAppSubcommand() {
+	// set args for examples sake
+	os.Args = []string{"say", "hi", "english", "--name", "Jeremy"}
+	app := cli.NewApp()
+	app.Name = "say"
+	app.Commands = []cli.Command{
+		{
+			Name:        "hello",
+			ShortName:   "hi",
+			Usage:       "use it to see a description",
+			Description: "This is how we describe hello the function",
+			Subcommands: []cli.Command{
+				{
+					Name:        "english",
+					ShortName:   "en",
+					Usage:       "sends a greeting in english",
+					Description: "greets someone in english",
+					Flags: []cli.Flag{
+						cli.StringFlag{
+							Name:  "name",
+							Value: "Bob",
+							Usage: "Name of the person to greet",
+						},
+					},
+					Action: func(c *cli.Context) {
+						fmt.Println("Hello,", c.String("name"))
+					},
+				},
+			},
+		},
+	}
+
+	app.Run(os.Args)
+	// Output:
+	// Hello, Jeremy
+}
+
+func ExampleAppHelp() {
+	// set args for examples sake
+	os.Args = []string{"greet", "h", "describeit"}
+
+	app := cli.NewApp()
+	app.Name = "greet"
+	app.Flags = []cli.Flag{
+		cli.StringFlag{Name: "name", Value: "bob", Usage: "a name to say"},
+	}
+	app.Commands = []cli.Command{
+		{
+			Name:        "describeit",
+			ShortName:   "d",
+			Usage:       "use it to see a description",
+			Description: "This is how we describe describeit the function",
+			Action: func(c *cli.Context) {
+				fmt.Printf("i like to describe things")
+			},
+		},
+	}
+	app.Run(os.Args)
+	// Output:
+	// NAME:
+	//    describeit - use it to see a description
+	//
+	// USAGE:
+	//    command describeit [arguments...]
+	//
+	// DESCRIPTION:
+	//    This is how we describe describeit the function
+}
+
+func ExampleAppBashComplete() {
+	// set args for examples sake
+	os.Args = []string{"greet", "--generate-bash-completion"}
+
+	app := cli.NewApp()
+	app.Name = "greet"
+	app.EnableBashCompletion = true
+	app.Commands = []cli.Command{
+		{
+			Name:        "describeit",
+			ShortName:   "d",
+			Usage:       "use it to see a description",
+			Description: "This is how we describe describeit the function",
+			Action: func(c *cli.Context) {
+				fmt.Printf("i like to describe things")
+			},
+		}, {
+			Name:        "next",
+			Usage:       "next example",
+			Description: "more stuff to see when generating bash completion",
+			Action: func(c *cli.Context) {
+				fmt.Printf("the next example")
+			},
+		},
+	}
+
+	app.Run(os.Args)
+	// Output:
+	// describeit
+	// d
+	// next
+	// help
+	// h
+}
+
+func TestApp_Run(t *testing.T) {
+	s := ""
+
+	app := cli.NewApp()
+	app.Action = func(c *cli.Context) {
+		s = s + c.Args().First()
+	}
+
+	err := app.Run([]string{"command", "foo"})
+	expect(t, err, nil)
+	err = app.Run([]string{"command", "bar"})
+	expect(t, err, nil)
+	expect(t, s, "foobar")
+}
+
+var commandAppTests = []struct {
+	name     string
+	expected bool
+}{
+	{"foobar", true},
+	{"batbaz", true},
+	{"b", true},
+	{"f", true},
+	{"bat", false},
+	{"nothing", false},
+}
+
+func TestApp_Command(t *testing.T) {
+	app := cli.NewApp()
+	fooCommand := cli.Command{Name: "foobar", ShortName: "f"}
+	batCommand := cli.Command{Name: "batbaz", ShortName: "b"}
+	app.Commands = []cli.Command{
+		fooCommand,
+		batCommand,
+	}
+
+	for _, test := range commandAppTests {
+		expect(t, app.Command(test.name) != nil, test.expected)
+	}
+}
+
+func TestApp_CommandWithArgBeforeFlags(t *testing.T) {
+	var parsedOption, firstArg string
+
+	app := cli.NewApp()
+	command := cli.Command{
+		Name: "cmd",
+		Flags: []cli.Flag{
+			cli.StringFlag{Name: "option", Value: "", Usage: "some option"},
+		},
+		Action: func(c *cli.Context) {
+			parsedOption = c.String("option")
+			firstArg = c.Args().First()
+		},
+	}
+	app.Commands = []cli.Command{command}
+
+	app.Run([]string{"", "cmd", "my-arg", "--option", "my-option"})
+
+	expect(t, parsedOption, "my-option")
+	expect(t, firstArg, "my-arg")
+}
+
+func TestApp_Float64Flag(t *testing.T) {
+	var meters float64
+
+	app := cli.NewApp()
+	app.Flags = []cli.Flag{
+		cli.Float64Flag{Name: "height", Value: 1.5, Usage: "Set the height, in meters"},
+	}
+	app.Action = func(c *cli.Context) {
+		meters = c.Float64("height")
+	}
+
+	app.Run([]string{"", "--height", "1.93"})
+	expect(t, meters, 1.93)
+}
+
+func TestApp_ParseSliceFlags(t *testing.T) {
+	var parsedOption, firstArg string
+	var parsedIntSlice []int
+	var parsedStringSlice []string
+
+	app := cli.NewApp()
+	command := cli.Command{
+		Name: "cmd",
+		Flags: []cli.Flag{
+			cli.IntSliceFlag{Name: "p", Value: &cli.IntSlice{}, Usage: "set one or more ip addr"},
+			cli.StringSliceFlag{Name: "ip", Value: &cli.StringSlice{}, Usage: "set one or more ports to open"},
+		},
+		Action: func(c *cli.Context) {
+			parsedIntSlice = c.IntSlice("p")
+			parsedStringSlice = c.StringSlice("ip")
+			parsedOption = c.String("option")
+			firstArg = c.Args().First()
+		},
+	}
+	app.Commands = []cli.Command{command}
+
+	app.Run([]string{"", "cmd", "my-arg", "-p", "22", "-p", "80", "-ip", "8.8.8.8", "-ip", "8.8.4.4"})
+
+	IntsEquals := func(a, b []int) bool {
+		if len(a) != len(b) {
+			return false
+		}
+		for i, v := range a {
+			if v != b[i] {
+				return false
+			}
+		}
+		return true
+	}
+
+	StrsEquals := func(a, b []string) bool {
+		if len(a) != len(b) {
+			return false
+		}
+		for i, v := range a {
+			if v != b[i] {
+				return false
+			}
+		}
+		return true
+	}
+	var expectedIntSlice = []int{22, 80}
+	var expectedStringSlice = []string{"8.8.8.8", "8.8.4.4"}
+
+	if !IntsEquals(parsedIntSlice, expectedIntSlice) {
+		t.Errorf("%v does not match %v", parsedIntSlice, expectedIntSlice)
+	}
+
+	if !StrsEquals(parsedStringSlice, expectedStringSlice) {
+		t.Errorf("%v does not match %v", parsedStringSlice, expectedStringSlice)
+	}
+}
+
+func TestApp_BeforeFunc(t *testing.T) {
+	beforeRun, subcommandRun := false, false
+	beforeError := fmt.Errorf("fail")
+	var err error
+
+	app := cli.NewApp()
+
+	app.Before = func(c *cli.Context) error {
+		beforeRun = true
+		s := c.String("opt")
+		if s == "fail" {
+			return beforeError
+		}
+
+		return nil
+	}
+
+	app.Commands = []cli.Command{
+		cli.Command{
+			Name: "sub",
+			Action: func(c *cli.Context) {
+				subcommandRun = true
+			},
+		},
+	}
+
+	app.Flags = []cli.Flag{
+		cli.StringFlag{Name: "opt"},
+	}
+
+	// run with the Before() func succeeding
+	err = app.Run([]string{"command", "--opt", "succeed", "sub"})
+
+	if err != nil {
+		t.Fatalf("Run error: %s", err)
+	}
+
+	if beforeRun == false {
+		t.Errorf("Before() not executed when expected")
+	}
+
+	if subcommandRun == false {
+		t.Errorf("Subcommand not executed when expected")
+	}
+
+	// reset
+	beforeRun, subcommandRun = false, false
+
+	// run with the Before() func failing
+	err = app.Run([]string{"command", "--opt", "fail", "sub"})
+
+	// should be the same error produced by the Before func
+	if err != beforeError {
+		t.Errorf("Run error expected, but not received")
+	}
+
+	if beforeRun == false {
+		t.Errorf("Before() not executed when expected")
+	}
+
+	if subcommandRun == true {
+		t.Errorf("Subcommand executed when NOT expected")
+	}
+
+}
+
+func TestAppHelpPrinter(t *testing.T) {
+	oldPrinter := cli.HelpPrinter
+	defer func() {
+		cli.HelpPrinter = oldPrinter
+	}()
+
+	var wasCalled = false
+	cli.HelpPrinter = func(template string, data interface{}) {
+		wasCalled = true
+	}
+
+	app := cli.NewApp()
+	app.Run([]string{"-h"})
+
+	if wasCalled == false {
+		t.Errorf("Help printer expected to be called, but was not")
+	}
+}
+
+func TestAppVersionPrinter(t *testing.T) {
+	oldPrinter := cli.VersionPrinter
+	defer func() {
+		cli.VersionPrinter = oldPrinter
+	}()
+
+	var wasCalled = false
+	cli.VersionPrinter = func(c *cli.Context) {
+		wasCalled = true
+	}
+
+	app := cli.NewApp()
+	ctx := cli.NewContext(app, nil, nil)
+	cli.ShowVersion(ctx)
+
+	if wasCalled == false {
+		t.Errorf("Version printer expected to be called, but was not")
+	}
+}
+
+func TestAppCommandNotFound(t *testing.T) {
+	beforeRun, subcommandRun := false, false
+	app := cli.NewApp()
+
+	app.CommandNotFound = func(c *cli.Context, command string) {
+		beforeRun = true
+	}
+
+	app.Commands = []cli.Command{
+		cli.Command{
+			Name: "bar",
+			Action: func(c *cli.Context) {
+				subcommandRun = true
+			},
+		},
+	}
+
+	app.Run([]string{"command", "foo"})
+
+	expect(t, beforeRun, true)
+	expect(t, subcommandRun, false)
+}
+
+func TestGlobalFlagsInSubcommands(t *testing.T) {
+	subcommandRun := false
+	app := cli.NewApp()
+
+	app.Flags = []cli.Flag{
+		cli.BoolFlag{Name: "debug, d", Usage: "Enable debugging"},
+	}
+
+	app.Commands = []cli.Command{
+		cli.Command{
+			Name: "foo",
+			Subcommands: []cli.Command{
+				{
+					Name: "bar",
+					Action: func(c *cli.Context) {
+						if c.GlobalBool("debug") {
+							subcommandRun = true
+						}
+					},
+				},
+			},
+		},
+	}
+
+	app.Run([]string{"command", "-d", "foo", "bar"})
+
+	expect(t, subcommandRun, true)
+}

third_party/src/github.com/codegangsta/cli/autocomplete/bash_autocomplete

@@ -0,0 +1,13 @@
+#! /bin/bash
+
+_cli_bash_autocomplete() {
+     local cur prev opts base
+     COMPREPLY=()
+     cur="${COMP_WORDS[COMP_CWORD]}"
+     prev="${COMP_WORDS[COMP_CWORD-1]}"
+     opts=$( ${COMP_WORDS[@]:0:$COMP_CWORD} --generate-bash-completion )
+     COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+     return 0
+ }
+  
+ complete -F _cli_bash_autocomplete $PROG

third_party/src/github.com/codegangsta/cli/autocomplete/zsh_autocomplete

@@ -0,0 +1,5 @@
+autoload -U compinit && compinit
+autoload -U bashcompinit && bashcompinit
+
+script_dir=$(dirname $0)
+source ${script_dir}/bash_autocomplete

third_party/src/github.com/codegangsta/cli/cli.go

@@ -0,0 +1,19 @@
+// Package cli provides a minimal framework for creating and organizing command line
+// Go applications. cli is designed to be easy to understand and write, the most simple
+// cli application can be written as follows:
+//   func main() {
+//     cli.NewApp().Run(os.Args)
+//   }
+//
+// Of course this application does not do much, so let's make this an actual application:
+//   func main() {
+//     app := cli.NewApp()
+//     app.Name = "greet"
+//     app.Usage = "say a greeting"
+//     app.Action = func(c *cli.Context) {
+//       println("Greetings")
+//     }
+//
+//     app.Run(os.Args)
+//   }
+package cli

third_party/src/github.com/codegangsta/cli/cli_test.go

@@ -0,0 +1,100 @@
+package cli_test
+
+import (
+	"os"
+
+	"github.com/codegangsta/cli"
+)
+
+func Example() {
+	app := cli.NewApp()
+	app.Name = "todo"
+	app.Usage = "task list on the command line"
+	app.Commands = []cli.Command{
+		{
+			Name:      "add",
+			ShortName: "a",
+			Usage:     "add a task to the list",
+			Action: func(c *cli.Context) {
+				println("added task: ", c.Args().First())
+			},
+		},
+		{
+			Name:      "complete",
+			ShortName: "c",
+			Usage:     "complete a task on the list",
+			Action: func(c *cli.Context) {
+				println("completed task: ", c.Args().First())
+			},
+		},
+	}
+
+	app.Run(os.Args)
+}
+
+func ExampleSubcommand() {
+	app := cli.NewApp()
+	app.Name = "say"
+	app.Commands = []cli.Command{
+		{
+			Name:        "hello",
+			ShortName:   "hi",
+			Usage:       "use it to see a description",
+			Description: "This is how we describe hello the function",
+			Subcommands: []cli.Command{
+				{
+					Name:        "english",
+					ShortName:   "en",
+					Usage:       "sends a greeting in english",
+					Description: "greets someone in english",
+					Flags: []cli.Flag{
+						cli.StringFlag{
+							Name:  "name",
+							Value: "Bob",
+							Usage: "Name of the person to greet",
+						},
+					},
+					Action: func(c *cli.Context) {
+						println("Hello, ", c.String("name"))
+					},
+				}, {
+					Name:      "spanish",
+					ShortName: "sp",
+					Usage:     "sends a greeting in spanish",
+					Flags: []cli.Flag{
+						cli.StringFlag{
+							Name:  "surname",
+							Value: "Jones",
+							Usage: "Surname of the person to greet",
+						},
+					},
+					Action: func(c *cli.Context) {
+						println("Hola, ", c.String("surname"))
+					},
+				}, {
+					Name:      "french",
+					ShortName: "fr",
+					Usage:     "sends a greeting in french",
+					Flags: []cli.Flag{
+						cli.StringFlag{
+							Name:  "nickname",
+							Value: "Stevie",
+							Usage: "Nickname of the person to greet",
+						},
+					},
+					Action: func(c *cli.Context) {
+						println("Bonjour, ", c.String("nickname"))
+					},
+				},
+			},
+		}, {
+			Name:  "bye",
+			Usage: "says goodbye",
+			Action: func(c *cli.Context) {
+				println("bye")
+			},
+		},
+	}
+
+	app.Run(os.Args)
+}

third_party/src/github.com/codegangsta/cli/command.go

@@ -0,0 +1,144 @@
+package cli
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strings"
+)
+
+// Command is a subcommand for a cli.App.
+type Command struct {
+	// The name of the command
+	Name string
+	// short name of the command. Typically one character
+	ShortName string
+	// A short description of the usage of this command
+	Usage string
+	// A longer explanation of how the command works
+	Description string
+	// The function to call when checking for bash command completions
+	BashComplete func(context *Context)
+	// An action to execute before any sub-subcommands are run, but after the context is ready
+	// If a non-nil error is returned, no sub-subcommands are run
+	Before func(context *Context) error
+	// The function to call when this command is invoked
+	Action func(context *Context)
+	// List of child commands
+	Subcommands []Command
+	// List of flags to parse
+	Flags []Flag
+	// Treat all flags as normal arguments if true
+	SkipFlagParsing bool
+	// Boolean to hide built-in help command
+	HideHelp bool
+}
+
+// Invokes the command given the context, parses ctx.Args() to generate command-specific flags
+func (c Command) Run(ctx *Context) error {
+
+	if len(c.Subcommands) > 0 || c.Before != nil {
+		return c.startApp(ctx)
+	}
+
+	if !c.HideHelp {
+		// append help to flags
+		c.Flags = append(
+			c.Flags,
+			HelpFlag,
+		)
+	}
+
+	if ctx.App.EnableBashCompletion {
+		c.Flags = append(c.Flags, BashCompletionFlag)
+	}
+
+	set := flagSet(c.Name, c.Flags)
+	set.SetOutput(ioutil.Discard)
+
+	firstFlagIndex := -1
+	for index, arg := range ctx.Args() {
+		if strings.HasPrefix(arg, "-") {
+			firstFlagIndex = index
+			break
+		}
+	}
+
+	var err error
+	if firstFlagIndex > -1 && !c.SkipFlagParsing {
+		args := ctx.Args()
+		regularArgs := args[1:firstFlagIndex]
+		flagArgs := args[firstFlagIndex:]
+		err = set.Parse(append(flagArgs, regularArgs...))
+	} else {
+		err = set.Parse(ctx.Args().Tail())
+	}
+
+	if err != nil {
+		fmt.Printf("Incorrect Usage.\n\n")
+		ShowCommandHelp(ctx, c.Name)
+		fmt.Println("")
+		return err
+	}
+
+	nerr := normalizeFlags(c.Flags, set)
+	if nerr != nil {
+		fmt.Println(nerr)
+		fmt.Println("")
+		ShowCommandHelp(ctx, c.Name)
+		fmt.Println("")
+		return nerr
+	}
+	context := NewContext(ctx.App, set, ctx.globalSet)
+
+	if checkCommandCompletions(context, c.Name) {
+		return nil
+	}
+
+	if checkCommandHelp(context, c.Name) {
+		return nil
+	}
+	context.Command = c
+	c.Action(context)
+	return nil
+}
+
+// Returns true if Command.Name or Command.ShortName matches given name
+func (c Command) HasName(name string) bool {
+	return c.Name == name || c.ShortName == name
+}
+
+func (c Command) startApp(ctx *Context) error {
+	app := NewApp()
+
+	// set the name and usage
+	app.Name = fmt.Sprintf("%s %s", ctx.App.Name, c.Name)
+	if c.Description != "" {
+		app.Usage = c.Description
+	} else {
+		app.Usage = c.Usage
+	}
+
+	// set CommandNotFound
+	app.CommandNotFound = ctx.App.CommandNotFound
+
+	// set the flags and commands
+	app.Commands = c.Subcommands
+	app.Flags = c.Flags
+	app.HideHelp = c.HideHelp
+
+	// bash completion
+	app.EnableBashCompletion = ctx.App.EnableBashCompletion
+	if c.BashComplete != nil {
+		app.BashComplete = c.BashComplete
+	}
+
+	// set the actions
+	app.Before = c.Before
+	if c.Action != nil {
+		app.Action = c.Action
+	} else {
+		app.Action = helpSubcommand.Action
+	}
+
+	return app.RunAsSubcommand(ctx)
+}

third_party/src/github.com/codegangsta/cli/command_test.go

@@ -0,0 +1,49 @@
+package cli_test
+
+import (
+	"flag"
+	"testing"
+
+	"github.com/codegangsta/cli"
+)
+
+func TestCommandDoNotIgnoreFlags(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	test := []string{"blah", "blah", "-break"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, set)
+
+	command := cli.Command{
+		Name:        "test-cmd",
+		ShortName:   "tc",
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action:      func(_ *cli.Context) {},
+	}
+	err := command.Run(c)
+
+	expect(t, err.Error(), "flag provided but not defined: -break")
+}
+
+func TestCommandIgnoreFlags(t *testing.T) {
+	app := cli.NewApp()
+	set := flag.NewFlagSet("test", 0)
+	test := []string{"blah", "blah"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, set)
+
+	command := cli.Command{
+		Name:            "test-cmd",
+		ShortName:       "tc",
+		Usage:           "this is for testing",
+		Description:     "testing",
+		Action:          func(_ *cli.Context) {},
+		SkipFlagParsing: true,
+	}
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}

third_party/src/github.com/codegangsta/cli/context.go

@@ -0,0 +1,315 @@
+package cli
+
+import (
+	"errors"
+	"flag"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Context is a type that is passed through to
+// each Handler action in a cli application. Context
+// can be used to retrieve context-specific Args and
+// parsed command-line options.
+type Context struct {
+	App       *App
+	Command   Command
+	flagSet   *flag.FlagSet
+	globalSet *flag.FlagSet
+	setFlags  map[string]bool
+}
+
+// Creates a new context. For use in when invoking an App or Command action.
+func NewContext(app *App, set *flag.FlagSet, globalSet *flag.FlagSet) *Context {
+	return &Context{App: app, flagSet: set, globalSet: globalSet}
+}
+
+// Looks up the value of a local int flag, returns 0 if no int flag exists
+func (c *Context) Int(name string) int {
+	return lookupInt(name, c.flagSet)
+}
+
+// Looks up the value of a local time.Duration flag, returns 0 if no time.Duration flag exists
+func (c *Context) Duration(name string) time.Duration {
+	return lookupDuration(name, c.flagSet)
+}
+
+// Looks up the value of a local float64 flag, returns 0 if no float64 flag exists
+func (c *Context) Float64(name string) float64 {
+	return lookupFloat64(name, c.flagSet)
+}
+
+// Looks up the value of a local bool flag, returns false if no bool flag exists
+func (c *Context) Bool(name string) bool {
+	return lookupBool(name, c.flagSet)
+}
+
+// Looks up the value of a local boolT flag, returns false if no bool flag exists
+func (c *Context) BoolT(name string) bool {
+	return lookupBoolT(name, c.flagSet)
+}
+
+// Looks up the value of a local string flag, returns "" if no string flag exists
+func (c *Context) String(name string) string {
+	return lookupString(name, c.flagSet)
+}
+
+// Looks up the value of a local string slice flag, returns nil if no string slice flag exists
+func (c *Context) StringSlice(name string) []string {
+	return lookupStringSlice(name, c.flagSet)
+}
+
+// Looks up the value of a local int slice flag, returns nil if no int slice flag exists
+func (c *Context) IntSlice(name string) []int {
+	return lookupIntSlice(name, c.flagSet)
+}
+
+// Looks up the value of a local generic flag, returns nil if no generic flag exists
+func (c *Context) Generic(name string) interface{} {
+	return lookupGeneric(name, c.flagSet)
+}
+
+// Looks up the value of a global int flag, returns 0 if no int flag exists
+func (c *Context) GlobalInt(name string) int {
+	return lookupInt(name, c.globalSet)
+}
+
+// Looks up the value of a global time.Duration flag, returns 0 if no time.Duration flag exists
+func (c *Context) GlobalDuration(name string) time.Duration {
+	return lookupDuration(name, c.globalSet)
+}
+
+// Looks up the value of a global bool flag, returns false if no bool flag exists
+func (c *Context) GlobalBool(name string) bool {
+	return lookupBool(name, c.globalSet)
+}
+
+// Looks up the value of a global string flag, returns "" if no string flag exists
+func (c *Context) GlobalString(name string) string {
+	return lookupString(name, c.globalSet)
+}
+
+// Looks up the value of a global string slice flag, returns nil if no string slice flag exists
+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
+}
+
+// Returns a slice of flag names used in this context.
+func (c *Context) FlagNames() (names []string) {
+	for _, flag := range c.Command.Flags {
+		name := strings.Split(flag.getName(), ",")[0]
+		if name == "help" {
+			continue
+		}
+		names = append(names, name)
+	}
+	return
+}
+
+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 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
+}
+
+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 lookupDuration(name string, set *flag.FlagSet) time.Duration {
+	f := set.Lookup(name)
+	if f != nil {
+		val, err := time.ParseDuration(f.Value.String())
+		if err == nil {
+			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
+}

third_party/src/github.com/codegangsta/cli/context_test.go

@@ -0,0 +1,77 @@
+package cli_test
+
+import (
+	"flag"
+	"testing"
+	"time"
+
+	"github.com/codegangsta/cli"
+)
+
+func TestNewContext(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Int("myflag", 12, "doc")
+	globalSet := flag.NewFlagSet("test", 0)
+	globalSet.Int("myflag", 42, "doc")
+	command := cli.Command{Name: "mycommand"}
+	c := cli.NewContext(nil, set, globalSet)
+	c.Command = command
+	expect(t, c.Int("myflag"), 12)
+	expect(t, c.GlobalInt("myflag"), 42)
+	expect(t, c.Command.Name, "mycommand")
+}
+
+func TestContext_Int(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Int("myflag", 12, "doc")
+	c := cli.NewContext(nil, set, set)
+	expect(t, c.Int("myflag"), 12)
+}
+
+func TestContext_Duration(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Duration("myflag", time.Duration(12*time.Second), "doc")
+	c := cli.NewContext(nil, set, set)
+	expect(t, c.Duration("myflag"), time.Duration(12*time.Second))
+}
+
+func TestContext_String(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.String("myflag", "hello world", "doc")
+	c := cli.NewContext(nil, set, set)
+	expect(t, c.String("myflag"), "hello world")
+}
+
+func TestContext_Bool(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Bool("myflag", false, "doc")
+	c := cli.NewContext(nil, set, set)
+	expect(t, c.Bool("myflag"), false)
+}
+
+func TestContext_BoolT(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Bool("myflag", true, "doc")
+	c := cli.NewContext(nil, set, set)
+	expect(t, c.BoolT("myflag"), true)
+}
+
+func TestContext_Args(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Bool("myflag", false, "doc")
+	c := cli.NewContext(nil, set, set)
+	set.Parse([]string{"--myflag", "bat", "baz"})
+	expect(t, len(c.Args()), 2)
+	expect(t, c.Bool("myflag"), true)
+}
+
+func TestContext_IsSet(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Bool("myflag", false, "doc")
+	set.String("otherflag", "hello world", "doc")
+	c := cli.NewContext(nil, set, set)
+	set.Parse([]string{"--myflag", "bat", "baz"})
+	expect(t, c.IsSet("myflag"), true)
+	expect(t, c.IsSet("otherflag"), false)
+	expect(t, c.IsSet("bogusflag"), false)
+}

third_party/src/github.com/codegangsta/cli/flag.go

@@ -0,0 +1,410 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// 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 DurationFlag struct {
+	Name   string
+	Value  time.Duration
+	Usage  string
+	EnvVar string
+}
+
+func (f DurationFlag) String() string {
+	return withEnvHint(f.EnvVar, fmt.Sprintf("%s '%v'\t%v", prefixedNames(f.Name), f.Value, f.Usage))
+}
+
+func (f DurationFlag) Apply(set *flag.FlagSet) {
+	if f.EnvVar != "" {
+		if envVal := os.Getenv(f.EnvVar); envVal != "" {
+			envValDuration, err := time.ParseDuration(envVal)
+			if err == nil {
+				f.Value = envValDuration
+			}
+		}
+	}
+
+	eachName(f.Name, func(name string) {
+		set.Duration(name, f.Value, f.Usage)
+	})
+}
+
+func (f DurationFlag) 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
+}

third_party/src/github.com/codegangsta/cli/flag_test.go

@@ -0,0 +1,587 @@
+package cli_test
+
+import (
+	"fmt"
+	"os"
+	"reflect"
+	"strings"
+	"testing"
+
+	"github.com/codegangsta/cli"
+)
+
+var boolFlagTests = []struct {
+	name     string
+	expected string
+}{
+	{"help", "--help\t"},
+	{"h", "-h\t"},
+}
+
+func TestBoolFlagHelpOutput(t *testing.T) {
+
+	for _, test := range boolFlagTests {
+		flag := cli.BoolFlag{Name: test.name}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%s does not match %s", output, test.expected)
+		}
+	}
+}
+
+var stringFlagTests = []struct {
+	name     string
+	value    string
+	expected string
+}{
+	{"help", "", "--help \t"},
+	{"h", "", "-h \t"},
+	{"h", "", "-h \t"},
+	{"test", "Something", "--test 'Something'\t"},
+}
+
+func TestStringFlagHelpOutput(t *testing.T) {
+
+	for _, test := range stringFlagTests {
+		flag := cli.StringFlag{Name: test.name, Value: test.value}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%s does not match %s", output, test.expected)
+		}
+	}
+}
+
+func TestStringFlagWithEnvVarHelpOutput(t *testing.T) {
+
+	os.Setenv("APP_FOO", "derp")
+	for _, test := range stringFlagTests {
+		flag := cli.StringFlag{Name: test.name, Value: test.value, EnvVar: "APP_FOO"}
+		output := flag.String()
+
+		if !strings.HasSuffix(output, " [$APP_FOO]") {
+			t.Errorf("%s does not end with [$APP_FOO]", output)
+		}
+	}
+}
+
+var stringSliceFlagTests = []struct {
+	name     string
+	value    *cli.StringSlice
+	expected string
+}{
+	{"help", func() *cli.StringSlice {
+		s := &cli.StringSlice{}
+		s.Set("")
+		return s
+	}(), "--help '--help option --help option'\t"},
+	{"h", func() *cli.StringSlice {
+		s := &cli.StringSlice{}
+		s.Set("")
+		return s
+	}(), "-h '-h option -h option'\t"},
+	{"h", func() *cli.StringSlice {
+		s := &cli.StringSlice{}
+		s.Set("")
+		return s
+	}(), "-h '-h option -h option'\t"},
+	{"test", func() *cli.StringSlice {
+		s := &cli.StringSlice{}
+		s.Set("Something")
+		return s
+	}(), "--test '--test option --test option'\t"},
+}
+
+func TestStringSliceFlagHelpOutput(t *testing.T) {
+
+	for _, test := range stringSliceFlagTests {
+		flag := cli.StringSliceFlag{Name: test.name, Value: test.value}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%q does not match %q", output, test.expected)
+		}
+	}
+}
+
+func TestStringSliceFlagWithEnvVarHelpOutput(t *testing.T) {
+
+	os.Setenv("APP_QWWX", "11,4")
+	for _, test := range stringSliceFlagTests {
+		flag := cli.StringSliceFlag{Name: test.name, Value: test.value, EnvVar: "APP_QWWX"}
+		output := flag.String()
+
+		if !strings.HasSuffix(output, " [$APP_QWWX]") {
+			t.Errorf("%q does not end with [$APP_QWWX]", output)
+		}
+	}
+}
+
+var intFlagTests = []struct {
+	name     string
+	expected string
+}{
+	{"help", "--help '0'\t"},
+	{"h", "-h '0'\t"},
+}
+
+func TestIntFlagHelpOutput(t *testing.T) {
+
+	for _, test := range intFlagTests {
+		flag := cli.IntFlag{Name: test.name}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%s does not match %s", output, test.expected)
+		}
+	}
+}
+
+func TestIntFlagWithEnvVarHelpOutput(t *testing.T) {
+
+	os.Setenv("APP_BAR", "2")
+	for _, test := range intFlagTests {
+		flag := cli.IntFlag{Name: test.name, EnvVar: "APP_BAR"}
+		output := flag.String()
+
+		if !strings.HasSuffix(output, " [$APP_BAR]") {
+			t.Errorf("%s does not end with [$APP_BAR]", output)
+		}
+	}
+}
+
+var durationFlagTests = []struct {
+	name     string
+	expected string
+}{
+	{"help", "--help '0'\t"},
+	{"h", "-h '0'\t"},
+}
+
+func TestDurationFlagHelpOutput(t *testing.T) {
+
+	for _, test := range durationFlagTests {
+		flag := cli.DurationFlag{Name: test.name}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%s does not match %s", output, test.expected)
+		}
+	}
+}
+
+func TestDurationFlagWithEnvVarHelpOutput(t *testing.T) {
+
+	os.Setenv("APP_BAR", "2h3m6s")
+	for _, test := range durationFlagTests {
+		flag := cli.DurationFlag{Name: test.name, EnvVar: "APP_BAR"}
+		output := flag.String()
+
+		if !strings.HasSuffix(output, " [$APP_BAR]") {
+			t.Errorf("%s does not end with [$APP_BAR]", output)
+		}
+	}
+}
+
+var intSliceFlagTests = []struct {
+	name     string
+	value    *cli.IntSlice
+	expected string
+}{
+	{"help", &cli.IntSlice{}, "--help '--help option --help option'\t"},
+	{"h", &cli.IntSlice{}, "-h '-h option -h option'\t"},
+	{"h", &cli.IntSlice{}, "-h '-h option -h option'\t"},
+	{"test", func() *cli.IntSlice {
+		i := &cli.IntSlice{}
+		i.Set("9")
+		return i
+	}(), "--test '--test option --test option'\t"},
+}
+
+func TestIntSliceFlagHelpOutput(t *testing.T) {
+
+	for _, test := range intSliceFlagTests {
+		flag := cli.IntSliceFlag{Name: test.name, Value: test.value}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%q does not match %q", output, test.expected)
+		}
+	}
+}
+
+func TestIntSliceFlagWithEnvVarHelpOutput(t *testing.T) {
+
+	os.Setenv("APP_SMURF", "42,3")
+	for _, test := range intSliceFlagTests {
+		flag := cli.IntSliceFlag{Name: test.name, Value: test.value, EnvVar: "APP_SMURF"}
+		output := flag.String()
+
+		if !strings.HasSuffix(output, " [$APP_SMURF]") {
+			t.Errorf("%q does not end with [$APP_SMURF]", output)
+		}
+	}
+}
+
+var float64FlagTests = []struct {
+	name     string
+	expected string
+}{
+	{"help", "--help '0'\t"},
+	{"h", "-h '0'\t"},
+}
+
+func TestFloat64FlagHelpOutput(t *testing.T) {
+
+	for _, test := range float64FlagTests {
+		flag := cli.Float64Flag{Name: test.name}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%s does not match %s", output, test.expected)
+		}
+	}
+}
+
+func TestFloat64FlagWithEnvVarHelpOutput(t *testing.T) {
+
+	os.Setenv("APP_BAZ", "99.4")
+	for _, test := range float64FlagTests {
+		flag := cli.Float64Flag{Name: test.name, EnvVar: "APP_BAZ"}
+		output := flag.String()
+
+		if !strings.HasSuffix(output, " [$APP_BAZ]") {
+			t.Errorf("%s does not end with [$APP_BAZ]", output)
+		}
+	}
+}
+
+var genericFlagTests = []struct {
+	name     string
+	value    cli.Generic
+	expected string
+}{
+	{"help", &Parser{}, "--help <nil>\t`-help option -help option` "},
+	{"h", &Parser{}, "-h <nil>\t`-h option -h option` "},
+	{"test", &Parser{}, "--test <nil>\t`-test option -test option` "},
+}
+
+func TestGenericFlagHelpOutput(t *testing.T) {
+
+	for _, test := range genericFlagTests {
+		flag := cli.GenericFlag{Name: test.name}
+		output := flag.String()
+
+		if output != test.expected {
+			t.Errorf("%q does not match %q", output, test.expected)
+		}
+	}
+}
+
+func TestGenericFlagWithEnvVarHelpOutput(t *testing.T) {
+
+	os.Setenv("APP_ZAP", "3")
+	for _, test := range genericFlagTests {
+		flag := cli.GenericFlag{Name: test.name, EnvVar: "APP_ZAP"}
+		output := flag.String()
+
+		if !strings.HasSuffix(output, " [$APP_ZAP]") {
+			t.Errorf("%s does not end with [$APP_ZAP]", output)
+		}
+	}
+}
+
+func TestParseMultiString(t *testing.T) {
+	(&cli.App{
+		Flags: []cli.Flag{
+			cli.StringFlag{Name: "serve, s"},
+		},
+		Action: func(ctx *cli.Context) {
+			if ctx.String("serve") != "10" {
+				t.Errorf("main name not set")
+			}
+			if ctx.String("s") != "10" {
+				t.Errorf("short name not set")
+			}
+		},
+	}).Run([]string{"run", "-s", "10"})
+}
+
+func TestParseMultiStringFromEnv(t *testing.T) {
+	os.Setenv("APP_COUNT", "20")
+	(&cli.App{
+		Flags: []cli.Flag{
+			cli.StringFlag{Name: "count, c", EnvVar: "APP_COUNT"},
+		},
+		Action: func(ctx *cli.Context) {
+			if ctx.String("count") != "20" {
+				t.Errorf("main name not set")
+			}
+			if ctx.String("c") != "20" {
+				t.Errorf("short name not set")
+			}
+		},
+	}).Run([]string{"run"})
+}
+
+func TestParseMultiStringSlice(t *testing.T) {
+	(&cli.App{
+		Flags: []cli.Flag{
+			cli.StringSliceFlag{Name: "serve, s", Value: &cli.StringSlice{}},
+		},
+		Action: func(ctx *cli.Context) {
+			if !reflect.DeepEqual(ctx.StringSlice("serve"), []string{"10", "20"}) {
+				t.Errorf("main name not set")
+			}
+			if !reflect.DeepEqual(ctx.StringSlice("s"), []string{"10", "20"}) {
+				t.Errorf("short name not set")
+			}
+		},
+	}).Run([]string{"run", "-s", "10", "-s", "20"})
+}
+
+func TestParseMultiStringSliceFromEnv(t *testing.T) {
+	os.Setenv("APP_INTERVALS", "20,30,40")
+
+	(&cli.App{
+		Flags: []cli.Flag{
+			cli.StringSliceFlag{Name: "intervals, i", Value: &cli.StringSlice{}, EnvVar: "APP_INTERVALS"},
+		},
+		Action: func(ctx *cli.Context) {
+			if !reflect.DeepEqual(ctx.StringSlice("intervals"), []string{"20", "30", "40"}) {
+				t.Errorf("main name not set from env")
+			}
+			if !reflect.DeepEqual(ctx.StringSlice("i"), []string{"20", "30", "40"}) {
+				t.Errorf("short name not set from env")
+			}
+		},
+	}).Run([]string{"run"})
+}
+
+func TestParseMultiInt(t *testing.T) {
+	a := cli.App{
+		Flags: []cli.Flag{
+			cli.IntFlag{Name: "serve, s"},
+		},
+		Action: func(ctx *cli.Context) {
+			if ctx.Int("serve") != 10 {
+				t.Errorf("main name not set")
+			}
+			if ctx.Int("s") != 10 {
+				t.Errorf("short name not set")
+			}
+		},
+	}
+	a.Run([]string{"run", "-s", "10"})
+}
+
+func TestParseMultiIntFromEnv(t *testing.T) {
+	os.Setenv("APP_TIMEOUT_SECONDS", "10")
+	a := cli.App{
+		Flags: []cli.Flag{
+			cli.IntFlag{Name: "timeout, t", EnvVar: "APP_TIMEOUT_SECONDS"},
+		},
+		Action: func(ctx *cli.Context) {
+			if ctx.Int("timeout") != 10 {
+				t.Errorf("main name not set")
+			}
+			if ctx.Int("t") != 10 {
+				t.Errorf("short name not set")
+			}
+		},
+	}
+	a.Run([]string{"run"})
+}
+
+func TestParseMultiIntSlice(t *testing.T) {
+	(&cli.App{
+		Flags: []cli.Flag{
+			cli.IntSliceFlag{Name: "serve, s", Value: &cli.IntSlice{}},
+		},
+		Action: func(ctx *cli.Context) {
+			if !reflect.DeepEqual(ctx.IntSlice("serve"), []int{10, 20}) {
+				t.Errorf("main name not set")
+			}
+			if !reflect.DeepEqual(ctx.IntSlice("s"), []int{10, 20}) {
+				t.Errorf("short name not set")
+			}
+		},
+	}).Run([]string{"run", "-s", "10", "-s", "20"})
+}
+
+func TestParseMultiIntSliceFromEnv(t *testing.T) {
+	os.Setenv("APP_INTERVALS", "20,30,40")
+
+	(&cli.App{
+		Flags: []cli.Flag{
+			cli.IntSliceFlag{Name: "intervals, i", Value: &cli.IntSlice{}, EnvVar: "APP_INTERVALS"},
+		},
+		Action: func(ctx *cli.Context) {
+			if !reflect.DeepEqual(ctx.IntSlice("intervals"), []int{20, 30, 40}) {
+				t.Errorf("main name not set from env")
+			}
+			if !reflect.DeepEqual(ctx.IntSlice("i"), []int{20, 30, 40}) {
+				t.Errorf("short name not set from env")
+			}
+		},
+	}).Run([]string{"run"})
+}
+
+func TestParseMultiFloat64(t *testing.T) {
+	a := cli.App{
+		Flags: []cli.Flag{
+			cli.Float64Flag{Name: "serve, s"},
+		},
+		Action: func(ctx *cli.Context) {
+			if ctx.Float64("serve") != 10.2 {
+				t.Errorf("main name not set")
+			}
+			if ctx.Float64("s") != 10.2 {
+				t.Errorf("short name not set")
+			}
+		},
+	}
+	a.Run([]string{"run", "-s", "10.2"})
+}
+
+func TestParseMultiFloat64FromEnv(t *testing.T) {
+	os.Setenv("APP_TIMEOUT_SECONDS", "15.5")
+	a := cli.App{
+		Flags: []cli.Flag{
+			cli.Float64Flag{Name: "timeout, t", EnvVar: "APP_TIMEOUT_SECONDS"},
+		},
+		Action: func(ctx *cli.Context) {
+			if ctx.Float64("timeout") != 15.5 {
+				t.Errorf("main name not set")
+			}
+			if ctx.Float64("t") != 15.5 {
+				t.Errorf("short name not set")
+			}
+		},
+	}
+	a.Run([]string{"run"})
+}
+
+func TestParseMultiBool(t *testing.T) {
+	a := cli.App{
+		Flags: []cli.Flag{
+			cli.BoolFlag{Name: "serve, s"},
+		},
+		Action: func(ctx *cli.Context) {
+			if ctx.Bool("serve") != true {
+				t.Errorf("main name not set")
+			}
+			if ctx.Bool("s") != true {
+				t.Errorf("short name not set")
+			}
+		},
+	}
+	a.Run([]string{"run", "--serve"})
+}
+
+func TestParseMultiBoolFromEnv(t *testing.T) {
+	os.Setenv("APP_DEBUG", "1")
+	a := cli.App{
+		Flags: []cli.Flag{
+			cli.BoolFlag{Name: "debug, d", EnvVar: "APP_DEBUG"},
+		},
+		Action: func(ctx *cli.Context) {
+			if ctx.Bool("debug") != true {
+				t.Errorf("main name not set from env")
+			}
+			if ctx.Bool("d") != true {
+				t.Errorf("short name not set from env")
+			}
+		},
+	}
+	a.Run([]string{"run"})
+}
+
+func TestParseMultiBoolT(t *testing.T) {
+	a := cli.App{
+		Flags: []cli.Flag{
+			cli.BoolTFlag{Name: "serve, s"},
+		},
+		Action: func(ctx *cli.Context) {
+			if ctx.BoolT("serve") != true {
+				t.Errorf("main name not set")
+			}
+			if ctx.BoolT("s") != true {
+				t.Errorf("short name not set")
+			}
+		},
+	}
+	a.Run([]string{"run", "--serve"})
+}
+
+func TestParseMultiBoolTFromEnv(t *testing.T) {
+	os.Setenv("APP_DEBUG", "0")
+	a := cli.App{
+		Flags: []cli.Flag{
+			cli.BoolTFlag{Name: "debug, d", EnvVar: "APP_DEBUG"},
+		},
+		Action: func(ctx *cli.Context) {
+			if ctx.BoolT("debug") != false {
+				t.Errorf("main name not set from env")
+			}
+			if ctx.BoolT("d") != false {
+				t.Errorf("short name not set from env")
+			}
+		},
+	}
+	a.Run([]string{"run"})
+}
+
+type Parser [2]string
+
+func (p *Parser) Set(value string) error {
+	parts := strings.Split(value, ",")
+	if len(parts) != 2 {
+		return fmt.Errorf("invalid format")
+	}
+
+	(*p)[0] = parts[0]
+	(*p)[1] = parts[1]
+
+	return nil
+}
+
+func (p *Parser) String() string {
+	return fmt.Sprintf("%s,%s", p[0], p[1])
+}
+
+func TestParseGeneric(t *testing.T) {
+	a := cli.App{
+		Flags: []cli.Flag{
+			cli.GenericFlag{Name: "serve, s", Value: &Parser{}},
+		},
+		Action: func(ctx *cli.Context) {
+			if !reflect.DeepEqual(ctx.Generic("serve"), &Parser{"10", "20"}) {
+				t.Errorf("main name not set")
+			}
+			if !reflect.DeepEqual(ctx.Generic("s"), &Parser{"10", "20"}) {
+				t.Errorf("short name not set")
+			}
+		},
+	}
+	a.Run([]string{"run", "-s", "10,20"})
+}
+
+func TestParseGenericFromEnv(t *testing.T) {
+	os.Setenv("APP_SERVE", "20,30")
+	a := cli.App{
+		Flags: []cli.Flag{
+			cli.GenericFlag{Name: "serve, s", Value: &Parser{}, EnvVar: "APP_SERVE"},
+		},
+		Action: func(ctx *cli.Context) {
+			if !reflect.DeepEqual(ctx.Generic("serve"), &Parser{"20", "30"}) {
+				t.Errorf("main name not set from env")
+			}
+			if !reflect.DeepEqual(ctx.Generic("s"), &Parser{"20", "30"}) {
+				t.Errorf("short name not set from env")
+			}
+		},
+	}
+	a.Run([]string{"run"})
+}

third_party/src/github.com/codegangsta/cli/help.go

@@ -0,0 +1,224 @@
+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
+
+// Prints version for the App
+var VersionPrinter = printVersion
+
+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) {
+	VersionPrinter(c)
+}
+
+func printVersion(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
+}

third_party/src/github.com/codegangsta/cli/helpers_test.go

@@ -0,0 +1,19 @@
+package cli_test
+
+import (
+	"reflect"
+	"testing"
+)
+
+/* Test Helpers */
+func expect(t *testing.T, a interface{}, b interface{}) {
+	if a != b {
+		t.Errorf("Expected %v (type %v) - Got %v (type %v)", b, reflect.TypeOf(b), a, reflect.TypeOf(a))
+	}
+}
+
+func refute(t *testing.T, a interface{}, b interface{}) {
+	if a == b {
+		t.Errorf("Did not expect %v (type %v) - Got %v (type %v)", b, reflect.TypeOf(b), a, reflect.TypeOf(a))
+	}
+}