56 lines
1.4 KiB
Ruby
56 lines
1.4 KiB
Ruby
# frozen_string_literal: true
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module Cask
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class Cmd
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class Help < AbstractCommand
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def run
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if args.empty?
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puts self.class.purpose
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puts
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puts self.class.usage
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elsif args.count == 1
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command_name = args.first
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unless command = self.class.commands[command_name]
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raise "No help information found for command '#{command_name}'."
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end
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if command.respond_to?(:usage)
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puts command.usage
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else
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puts command.help
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end
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else
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raise ArgumentError, "#{self.class.command_name} only takes up to one argument."
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end
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end
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def self.purpose
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<<~EOS
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Homebrew Cask provides a friendly CLI workflow for the administration
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of macOS applications distributed as binaries.
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EOS
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end
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def self.commands
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Cmd.command_classes.select(&:visible?).map { |klass| [klass.command_name, klass] }.to_h
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end
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def self.usage
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max_command_len = Cmd.commands.map(&:length).max
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"Commands:\n" +
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Cmd.command_classes
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.select(&:visible?)
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.map { |klass| " #{klass.command_name.ljust(max_command_len)} #{klass.help}\n" }
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.join +
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%Q(\nSee also "man brew-cask")
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end
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def self.help
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"print help strings for commands"
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end
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end
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end
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end
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