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The `--help` option has been replaced by a new `help` subcommand. Invoking `mpbb help` displays global usage and available subcommands, while `mpbb help <subcommand>` displays subcommand-specific usage. Each subcommand script `mpbb-FOO` must now define a function `FOO-usage` that prints its specific help to standard out. git-svn-id: https://svn.macports.org/repository/macports/contrib/mp-buildbot@152528 d073be05-634f-4543-b044-5fe20cf6d1d6
38 lines
1.0 KiB
Bash
38 lines
1.0 KiB
Bash
#!/bin/bash
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# -*- coding: utf-8; mode: sh; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=sh:et:sw=4:ts=4:sts=4
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# Note:
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# This script is sourced by the mpbb wrapper script.
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# Do not execute this directly!
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help-usage() {
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cat <<EOF
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usage: $prog help [<command>]
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Show usage information for \`$prog' or a specific \`$prog' subcommand.
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Run \`$prog help' for global options and a list of other subcommands.
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EOF
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}
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help() {
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local cols helpfunc prog
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cols=$(tput cols) || cols=80
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# The main program should define "mpbb-usage", which is called if
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# "mpbb help" is invoked without any arguments.
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helpfunc=${1-mpbb}-usage
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prog=$(basename "$0")
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readonly cols helpfunc prog
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# This loop exits with 0 if usages contains helpfunc or is empty.
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for usage in "${usages[@]}"; do
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[[ $usage == "$helpfunc" ]] && break
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done
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if (( $? != 0 || ${#usages[@]} == 0 )); then
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err "No help available for subcommand \`${helpfunc%-usage}'"
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return 2
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fi
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"$helpfunc" | fmt -w $((cols - 8)) >&2
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}
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