brew.{rb,sh}: move to Library/Homebrew. (#506)

1 files changed, 146 insertions, 0 deletions

diff --git a/Library/Homebrew/brew.rb b/Library/Homebrew/brew.rb
new file mode 100644
index 000000000..9d29f4396
--- /dev/null
+++ b/Library/Homebrew/brew.rb
@@ -0,0 +1,146 @@
+std_trap = trap("INT") { exit! 130 } # no backtrace thanks
+
+require "pathname"
+HOMEBREW_LIBRARY_PATH = Pathname.new(__FILE__).realpath.parent
+$:.unshift(HOMEBREW_LIBRARY_PATH.to_s)
+require "global"
+
+if ARGV == %w[--version] || ARGV == %w[-v]
+  puts "Homebrew #{Homebrew.homebrew_version_string}"
+  puts "Homebrew/homebrew-core #{Homebrew.core_tap_version_string}"
+  exit 0
+end
+
+if OS.mac? && MacOS.version < "10.6"
+  abort <<-EOABORT.undent
+    Homebrew requires Snow Leopard or higher. For Tiger and Leopard support, see:
+    https://github.com/mistydemeo/tigerbrew
+  EOABORT
+end
+
+def require?(path)
+  require path
+rescue LoadError => e
+  # HACK: ( because we should raise on syntax errors but
+  # not if the file doesn't exist. TODO make robust!
+  raise unless e.to_s.include? path
+end
+
+begin
+  trap("INT", std_trap) # restore default CTRL-C handler
+
+  empty_argv = ARGV.empty?
+  help_flag_list = %w[-h --help --usage -?]
+  help_flag = false
+  internal_cmd = true
+  cmd = nil
+
+  ARGV.dup.each_with_index do |arg, i|
+    if help_flag && cmd
+      break
+    elsif help_flag_list.include?(arg)
+      # Option-style help: Both `--help <cmd>` and `<cmd> --help` are fine.
+      help_flag = true
+    elsif arg == "help" && !cmd
+      # Command-style help: `help <cmd>` is fine, but `<cmd> help` is not.
+      help_flag = true
+    elsif !cmd
+      cmd = ARGV.delete_at(i)
+    end
+  end
+
+  # Add contributed commands to PATH before checking.
+  Dir["#{HOMEBREW_LIBRARY}/Taps/*/*/cmd"].each do |tap_cmd_dir|
+    ENV["PATH"] += "#{File::PATH_SEPARATOR}#{tap_cmd_dir}"
+  end
+
+  # Add SCM wrappers.
+  ENV["PATH"] += "#{File::PATH_SEPARATOR}#{HOMEBREW_SHIMS_PATH}/scm"
+
+  if cmd
+    internal_cmd = require? HOMEBREW_LIBRARY_PATH.join("cmd", cmd)
+
+    if !internal_cmd && ARGV.homebrew_developer?
+      internal_cmd = require? HOMEBREW_LIBRARY_PATH.join("dev-cmd", cmd)
+    end
+  end
+
+  # Usage instructions should be displayed if and only if one of:
+  # - a help flag is passed AND an internal command is matched
+  # - a help flag is passed AND there is no command specified
+  # - no arguments are passed
+  #
+  # It should never affect external commands so they can handle usage
+  # arguments themselves.
+  if empty_argv || help_flag
+    require "cmd/help"
+    Homebrew.help cmd, :empty_argv => empty_argv
+    # `Homebrew.help` never returns, except for external/unknown commands.
+  end
+
+  # Uninstall old brew-cask if it's still around; we just use the tap now.
+  if cmd == "cask" && (HOMEBREW_CELLAR/"brew-cask").exist?
+    system(HOMEBREW_BREW_FILE, "uninstall", "--force", "brew-cask")
+  end
+
+  if internal_cmd
+    Homebrew.send cmd.to_s.tr("-", "_").downcase
+  elsif which "brew-#{cmd}"
+    %w[CACHE LIBRARY_PATH].each do |e|
+      ENV["HOMEBREW_#{e}"] = Object.const_get("HOMEBREW_#{e}").to_s
+    end
+    exec "brew-#{cmd}", *ARGV
+  elsif (path = which("brew-#{cmd}.rb")) && require?(path)
+    exit Homebrew.failed? ? 1 : 0
+  else
+    require "tap"
+    possible_tap = OFFICIAL_CMD_TAPS.find { |_, cmds| cmds.include?(cmd) }
+    possible_tap = Tap.fetch(possible_tap.first) if possible_tap
+
+    if possible_tap && !possible_tap.installed?
+      brew_uid = HOMEBREW_BREW_FILE.stat.uid
+      tap_commands = []
+      if Process.uid.zero? && !brew_uid.zero?
+        tap_commands += %W[/usr/bin/sudo -u ##{brew_uid}]
+      end
+      tap_commands += %W[#{HOMEBREW_BREW_FILE} tap #{possible_tap}]
+      safe_system(*tap_commands)
+      exec HOMEBREW_BREW_FILE, cmd, *ARGV
+    else
+      onoe "Unknown command: #{cmd}"
+      exit 1
+    end
+  end
+
+rescue UsageError => e
+  require "cmd/help"
+  Homebrew.help cmd, :usage_error => e.message
+rescue SystemExit => e
+  onoe "Kernel.exit" if ARGV.verbose? && !e.success?
+  $stderr.puts e.backtrace if ARGV.debug?
+  raise
+rescue Interrupt => e
+  $stderr.puts # seemingly a newline is typical
+  exit 130
+rescue BuildError => e
+  Utils::Analytics.report_exception(e)
+  e.dump
+  exit 1
+rescue RuntimeError, SystemCallError => e
+  Utils::Analytics.report_exception(e)
+  raise if e.message.empty?
+  onoe e
+  $stderr.puts e.backtrace if ARGV.debug?
+  exit 1
+rescue Exception => e
+  Utils::Analytics.report_exception(e)
+  onoe e
+  if internal_cmd && defined?(OS::ISSUES_URL)
+    $stderr.puts "#{Tty.white}Please report this bug:"
+    $stderr.puts "    #{Tty.em}#{OS::ISSUES_URL}#{Tty.reset}"
+  end
+  $stderr.puts e.backtrace
+  exit 1
+else
+  exit 1 if Homebrew.failed?
+end