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cmd: improve error reporting for too many/few arguments - fixes #2860

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Improve docs on the different kind of flag passing.
This commit is contained in:
Nick Craig-Wood 2018-12-29 17:34:58 +00:00
parent 51ab1c940a
commit 95e52e1ac3
2 changed files with 13 additions and 6 deletions
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10
cmd/cmd.go
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@ -51,7 +51,7 @@ var (
errorCommandNotFound = errors.New("command not found")
errorUncategorized = errors.New("uncategorized error")
errorNotEnoughArguments = errors.New("not enough arguments")
errorTooManyArguents = errors.New("too many arguments")
errorTooManyArguments = errors.New("too many arguments")
)
const (
@ -294,14 +294,12 @@ func Run(Retry bool, showStats bool, cmd *cobra.Command, f func() error) {
func CheckArgs(MinArgs, MaxArgs int, cmd *cobra.Command, args []string) {
if len(args) < MinArgs {
_ = cmd.Usage()
_, _ = fmt.Fprintf(os.Stderr, "Command %s needs %d arguments minimum\n", cmd.Name(), MinArgs)
// os.Exit(1)
_, _ = fmt.Fprintf(os.Stderr, "Command %s needs %d arguments minimum: you provided %d non flag arguments: %q\n", cmd.Name(), MinArgs, len(args), args)
resolveExitCode(errorNotEnoughArguments)
} else if len(args) > MaxArgs {
_ = cmd.Usage()
_, _ = fmt.Fprintf(os.Stderr, "Command %s needs %d arguments maximum\n", cmd.Name(), MaxArgs)
// os.Exit(1)
resolveExitCode(errorTooManyArguents)
_, _ = fmt.Fprintf(os.Stderr, "Command %s needs %d arguments maximum: you provided %d non flag arguments: %q\n", cmd.Name(), MaxArgs, len(args), args)
resolveExitCode(errorTooManyArguments)
}
}