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Fix the late init help flag

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This commit is contained in:
Eric Paris 2015-09-01 00:16:41 -04:00
parent 4c4f2d9417
commit ae28810f0e
1 changed files with 18 additions and 5 deletions
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23
command.go
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@ -92,7 +92,6 @@ type Command struct {
helpTemplate string // Can be defined by Application
helpFunc func(*Command, []string) // Help can be defined by application
helpCommand *Command // The help command
helpFlagVal bool
// The global normalization function that we can use on every pFlag set and children commands
globNormFunc func(f *flag.FlagSet, name string) flag.NormalizedName
}
@ -450,13 +449,24 @@ func (c *Command) execute(a []string) (err error) {
c.Printf("Command %q is deprecated, %s\n", c.Name(), c.Deprecated)
}
// initialize help flag as the last point possible to allow for user
// overriding
c.initHelpFlag()
err = c.ParseFlags(a)
if err != nil {
return err
}
// If help is called, regardless of other flags, return we want help
// Also say we need help if c.Run is nil.
if c.helpFlagVal || !c.Runnable() {
helpVal, err := c.Flags().GetBool("help")
if err != nil {
// should be impossible to get here as we always declare a help
// flag in initHelpFlag()
c.Println("\"help\" flag declared as non-bool. Please correct your code")
return err
}
if helpVal || !c.Runnable() {
return flag.ErrHelp
}
@ -526,7 +536,7 @@ func (c *Command) Execute() (err error) {
// initialize help as the last point possible to allow for user
// overriding
c.initHelp()
c.initHelpCmd()
var args []string
@ -560,10 +570,13 @@ func (c *Command) Execute() (err error) {
return
}
func (c *Command) initHelp() {
func (c *Command) initHelpFlag() {
if c.Flags().Lookup("help") == nil {
c.Flags().BoolVarP(&c.helpFlagVal, "help", "h", false, "help for "+c.Name())
c.Flags().BoolP("help", "h", false, "help for "+c.Name())
}
}
func (c *Command) initHelpCmd() {
if c.helpCommand == nil {
if !c.HasSubCommands() {
return