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@ -34,6 +34,9 @@ type App struct {
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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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// An action to execute after any subcommands are run, but after the subcommand has finished
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// It is run regardless of Because() result
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After 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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@ -74,7 +77,7 @@ func NewApp() *App {
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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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func (a *App) Run(arguments []string) (err error) {
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if HelpPrinter == nil {
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defer func() {
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HelpPrinter = nil
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@ -111,7 +114,7 @@ func (a *App) Run(arguments []string) error {
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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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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.Fprintln(a.Writer, nerr)
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@ -141,6 +144,15 @@ func (a *App) Run(arguments []string) error {
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return nil
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}
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if a.After != nil {
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defer func() {
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// err is always nil here.
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// There is a check to see if it is non-nil
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// just few lines before.
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err = a.After(context)
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}()
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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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@ -171,7 +183,7 @@ func (a *App) RunAndExitOnError() {
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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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func (a *App) RunAsSubcommand(ctx *Context) (err 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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@ -190,7 +202,7 @@ func (a *App) RunAsSubcommand(ctx *Context) error {
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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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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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@ -225,6 +237,15 @@ func (a *App) RunAsSubcommand(ctx *Context) error {
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}
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}
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if a.After != nil {
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defer func() {
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// err is always nil here.
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// There is a check to see if it is non-nil
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// just few lines before.
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err = a.After(context)
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}()
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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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