migrate to upstream libcompose in one and a half go

vendor/github.com/codegangsta/cli/app.go

@@ -5,18 +5,20 @@ import (
 	"io"
 	"io/ioutil"
 	"os"
-	"text/tabwriter"
-	"text/template"
 	"time"
 )
 
 // App is the main structure of a cli application. It is recomended that
-// and app be created with the cli.NewApp() function
+// an app be created with the cli.NewApp() function
 type App struct {
 	// The name of the program. Defaults to os.Args[0]
 	Name string
+	// Full name of command for help, defaults to Name
+	HelpName string
 	// Description of the program.
 	Usage string
+	// Description of the program argument format.
+	ArgsUsage string
 	// Version of the program
 	Version string
 	// List of commands to execute
@@ -45,6 +47,8 @@ type App struct {
 	Compiled time.Time
 	// List of all authors who contributed
 	Authors []Author
+	// Copyright of the binary if any
+	Copyright string
 	// Name of Author (Note: Use App.Authors, this is deprecated)
 	Author string
 	// Email of Author (Note: Use App.Authors, this is deprecated)
@@ -67,6 +71,7 @@ func compileTime() time.Time {
 func NewApp() *App {
 	return &App{
 		Name:         os.Args[0],
+		HelpName:     os.Args[0],
 		Usage:        "A new cli application",
 		Version:      "0.0.0",
 		BashComplete: DefaultAppComplete,
@@ -82,21 +87,14 @@ func (a *App) Run(arguments []string) (err error) {
 		a.Authors = append(a.Authors, Author{Name: a.Author, Email: a.Email})
 	}
 
-	if HelpPrinter == nil {
-		defer func() {
-			HelpPrinter = nil
-		}()
-
-		HelpPrinter = func(templ string, data interface{}) {
-			w := tabwriter.NewWriter(a.Writer, 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()
+	newCmds := []Command{}
+	for _, c := range a.Commands {
+		if c.HelpName == "" {
+			c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
 		}
+		newCmds = append(newCmds, c)
 	}
+	a.Commands = newCmds
 
 	// append help to commands
 	if a.Command(helpCommand.Name) == nil && !a.HideHelp {
@@ -122,17 +120,16 @@ func (a *App) Run(arguments []string) (err error) {
 	nerr := normalizeFlags(a.Flags, set)
 	if nerr != nil {
 		fmt.Fprintln(a.Writer, nerr)
-		context := NewContext(a, set, set)
+		context := NewContext(a, set, nil)
 		ShowAppHelp(context)
-		fmt.Fprintln(a.Writer)
 		return nerr
 	}
-	context := NewContext(a, set, set)
+	context := NewContext(a, set, nil)
 
 	if err != nil {
-		fmt.Fprintf(a.Writer, "Incorrect Usage.\n\n")
-		ShowAppHelp(context)
+		fmt.Fprintln(a.Writer, "Incorrect Usage.")
 		fmt.Fprintln(a.Writer)
+		ShowAppHelp(context)
 		return err
 	}
 
@@ -140,20 +137,26 @@ func (a *App) Run(arguments []string) (err error) {
 		return nil
 	}
 
-	if checkHelp(context) {
+	if !a.HideHelp && checkHelp(context) {
+		ShowAppHelp(context)
 		return nil
 	}
 
-	if checkVersion(context) {
+	if !a.HideVersion && checkVersion(context) {
+		ShowVersion(context)
 		return nil
 	}
 
 	if a.After != nil {
 		defer func() {
-			// err is always nil here.
-			// There is a check to see if it is non-nil
-			// just few lines before.
-			err = a.After(context)
+			afterErr := a.After(context)
+			if afterErr != nil {
+				if err != nil {
+					err = NewMultiError(err, afterErr)
+				} else {
+					err = afterErr
+				}
+			}
 		}()
 	}
 
@@ -198,6 +201,15 @@ func (a *App) RunAsSubcommand(ctx *Context) (err error) {
 		}
 	}
 
+	newCmds := []Command{}
+	for _, c := range a.Commands {
+		if c.HelpName == "" {
+			c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
+		}
+		newCmds = append(newCmds, c)
+	}
+	a.Commands = newCmds
+
 	// append flags
 	if a.EnableBashCompletion {
 		a.appendFlag(BashCompletionFlag)
@@ -208,21 +220,22 @@ func (a *App) RunAsSubcommand(ctx *Context) (err error) {
 	set.SetOutput(ioutil.Discard)
 	err = set.Parse(ctx.Args().Tail())
 	nerr := normalizeFlags(a.Flags, set)
-	context := NewContext(a, set, ctx.globalSet)
+	context := NewContext(a, set, ctx)
 
 	if nerr != nil {
 		fmt.Fprintln(a.Writer, nerr)
+		fmt.Fprintln(a.Writer)
 		if len(a.Commands) > 0 {
 			ShowSubcommandHelp(context)
 		} else {
 			ShowCommandHelp(ctx, context.Args().First())
 		}
-		fmt.Fprintln(a.Writer)
 		return nerr
 	}
 
 	if err != nil {
-		fmt.Fprintf(a.Writer, "Incorrect Usage.\n\n")
+		fmt.Fprintln(a.Writer, "Incorrect Usage.")
+		fmt.Fprintln(a.Writer)
 		ShowSubcommandHelp(context)
 		return err
 	}
@@ -243,10 +256,14 @@ func (a *App) RunAsSubcommand(ctx *Context) (err error) {
 
 	if a.After != nil {
 		defer func() {
-			// err is always nil here.
-			// There is a check to see if it is non-nil
-			// just few lines before.
-			err = a.After(context)
+			afterErr := a.After(context)
+			if afterErr != nil {
+				if err != nil {
+					err = NewMultiError(err, afterErr)
+				} else {
+					err = afterErr
+				}
+			}
 		}()
 	}