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command: expose print help
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This is useful for custom help commands.

Signed-off-by: Ophestra <cat@gensokyo.uk>
This commit is contained in:
Ophestra 2025-02-23 01:17:57 +09:00
parent 312753924b
commit 416d93e880
Signed by: cat
SSH Key Fingerprint: SHA256:gQ67O0enBZ7UdZypgtspB2FDM1g3GVw8nX0XSdcFw8Q
2 changed files with 5 additions and 0 deletions
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3
command/command.go
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@ -39,6 +39,9 @@ type (
// NewCommand returns a new subcommand with direct command handling. // NewCommand returns a new subcommand with direct command handling.
NewCommand(name, usage string, f HandlerFunc) (sub Flag[Node]) NewCommand(name, usage string, f HandlerFunc) (sub Flag[Node])
// PrintHelp prints a help message to the configured writer.
PrintHelp()
Flag[T] Flag[T]
} }
) )

2
command/help.go
View File

@ -10,6 +10,8 @@ import (
var ErrHelp = errors.New("help requested") var ErrHelp = errors.New("help requested")
func (n *node) PrintHelp() { _ = n.writeHelp() }
func (n *node) writeHelp() error { func (n *node) writeHelp() error {
if _, err := fmt.Fprintf(n.out, if _, err := fmt.Fprintf(n.out,
"\nUsage:\t%s [-h | --help]%s COMMAND [OPTIONS]\n", "\nUsage:\t%s [-h | --help]%s COMMAND [OPTIONS]\n",