90 lines
2.4 KiB
Ruby
90 lines
2.4 KiB
Ruby
HOMEBREW_HELP = <<-EOS.freeze
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Example usage:
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brew search [TEXT|/REGEX/]
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brew (info|home|options) [FORMULA...]
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brew install FORMULA...
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brew update
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brew upgrade [FORMULA...]
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brew uninstall FORMULA...
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brew list [FORMULA...]
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Troubleshooting:
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brew config
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brew doctor
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brew install -vd FORMULA
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Developers:
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brew create [URL [--no-fetch]]
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brew edit [FORMULA...]
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https://github.com/Homebrew/brew/blob/master/share/doc/homebrew/Formula-Cookbook.md
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Further help:
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man brew
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brew help [COMMAND]
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brew home
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EOS
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# NOTE Keep the lenth of vanilla --help less than 25 lines!
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# This is because the default Terminal height is 25 lines. Scrolling sucks
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# and concision is important. If more help is needed we should start
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# specialising help like the gem command does.
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# NOTE Keep lines less than 80 characters! Wrapping is just not cricket.
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# NOTE The reason the string is at the top is so 25 lines is easy to measure!
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require "commands"
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module Homebrew
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def help(cmd = nil, flags = {})
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# Resolve command aliases and find file containing the implementation.
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if cmd
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cmd = HOMEBREW_INTERNAL_COMMAND_ALIASES.fetch(cmd, cmd)
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path = Commands.path(cmd)
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end
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# Display command-specific (or generic) help in response to `UsageError`.
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if (error_message = flags[:usage_error])
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$stderr.puts path ? command_help(path) : HOMEBREW_HELP
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$stderr.puts
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onoe error_message
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exit 1
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end
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# Handle `brew` (no arguments).
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if flags[:empty_argv]
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$stderr.puts HOMEBREW_HELP
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exit 1
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end
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# Handle `brew (-h|--help|--usage|-?|help)` (no other arguments).
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if cmd.nil?
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puts HOMEBREW_HELP
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exit 0
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end
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# Resume execution in `brew.rb` for external/unknown commands.
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return if path.nil?
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# Display help for internal command (or generic help if undocumented).
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puts command_help(path)
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exit 0
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end
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private
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def command_help(path)
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help_lines = path.read.lines.grep(/^#:/)
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if help_lines.empty?
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opoo "No help text in: #{path}" if ARGV.homebrew_developer?
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HOMEBREW_HELP
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else
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help_lines.map do |line|
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line.slice(2..-1)
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.sub(/^ \* /, "#{Tty.highlight}brew#{Tty.reset} ")
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.gsub(/`(.*?)`/, "#{Tty.highlight}\\1#{Tty.reset}")
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.gsub(/<(.*?)>/, "#{Tty.em}\\1#{Tty.reset}")
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.gsub("@hide_from_man_page", "")
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end.join.strip
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end
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end
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end
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