brew/Library/Homebrew/cask/lib/hbc/cli/install.rb

class Hbc::CLI::Install < Hbc::CLI::Base
  def self.run(*args)
    cask_tokens = cask_tokens_from(args)
    raise Hbc::CaskUnspecifiedError if cask_tokens.empty?
    force = args.include? "--force"
    skip_cask_deps = args.include? "--skip-cask-deps"
    require_sha = args.include? "--require-sha"
    retval = install_casks cask_tokens, force, skip_cask_deps, require_sha
    # retval is ternary: true/false/nil

    raise Hbc::CaskError, "nothing to install" if retval.nil?
    raise Hbc::CaskError, "install incomplete" unless retval
  end

  def self.install_casks(cask_tokens, force, skip_cask_deps, require_sha)
    count = 0
    cask_tokens.each do |cask_token|
      begin
        cask = Hbc.load(cask_token)
        Hbc::Installer.new(cask,
                           force:          force,
                           skip_cask_deps: skip_cask_deps,
                           require_sha:    require_sha).install
        count += 1
      rescue Hbc::CaskAlreadyInstalledError => e
        opoo e.message
        count += 1
      rescue Hbc::CaskAutoUpdatesError => e
        opoo e.message
        count += 1
      rescue Hbc::CaskUnavailableError => e
        warn_unavailable_with_suggestion cask_token, e
      rescue Hbc::CaskNoShasumError => e
        opoo e.message
        count += 1
      end
    end
    count.zero? ? nil : count == cask_tokens.length
  end

  def self.warn_unavailable_with_suggestion(cask_token, e)
    exact_match, partial_matches = Hbc::CLI::Search.search(cask_token)
    errmsg = e.message
    if exact_match
      errmsg.concat(". Did you mean:\n#{exact_match}")
    elsif !partial_matches.empty?
      errmsg.concat(". Did you mean one of:\n#{puts_columns(partial_matches.take(20))}\n")
    end
    onoe errmsg
  end

  def self.help
    "installs the given Cask"
  end

  def self.needs_init?
    true
  end
end