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flags.Help takes a summary string

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This commit is contained in:
bth 2026-01-20 20:17:32 -08:00
commit f645e18b5b
5 changed files with 45 additions and 32 deletions
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8
flags/flags.go
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@ -86,11 +86,12 @@ func HelpInvalidArg(sub cmd.Subcommand, arg string) {
// print out help string by reflecting over fields of provided opts struct
// and os.Exit(0)
func Help(sub cmd.Subcommand, opts any) {
func Help(sub cmd.Subcommand, summary string, opts any) {
v := reflect.ValueOf(opts)
t := v.Type()
w := tabwriter.NewWriter(os.Stdout, 0, 0, 3, ' ', 0)
// everything should go to either stderr or stdout:
w := tabwriter.NewWriter(os.Stderr, 0, 0, 3, ' ', 0)
positional := ""
for i := 0; i < v.NumField(); i++ {
@ -112,7 +113,8 @@ func Help(sub cmd.Subcommand, opts any) {
)
}
}
log.Printf("um %s%s\n", sub, positional)
log.Printf("um %s%s\n\n", sub, positional)
log.Printf("%s\n\n", summary)
w.Flush()
os.Exit(0)
}