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enable composing PositionalArgs

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This commit is contained in:
Nelz 2019-06-28 14:47:35 -07:00
parent 442031e4ff
commit 488a4bc560
1 changed files with 13 additions and 6 deletions
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19
args.go
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@ -90,12 +90,7 @@ func ExactArgs(n int) PositionalArgs {
// there are not exactly N positional args OR
// there are any positional args that are not in the `ValidArgs` field of `Command`
func ExactValidArgs(n int) PositionalArgs {
return func(cmd *Command, args []string) error {
if err := ExactArgs(n)(cmd, args); err != nil {
return err
}
return OnlyValidArgs(cmd, args)
}
return ComposedArgs(ExactArgs(n), OnlyValidArgs)
}
// RangeArgs returns an error if the number of args is not within the expected range.
@ -107,3 +102,15 @@ func RangeArgs(min int, max int) PositionalArgs {
return nil
}
}
// ComposedArgs allows combining several PositionalArgs to work in concert.
func ComposedArgs(pargs ...PositionalArgs) PositionalArgs {
return func(cmd *Command, args []string) error {
for _, parg := range pargs {
if err := parg(cmd, args); err != nil {
return err
}
}
return nil
}
}