#  Copyright 2009 Max Howell and other contributors.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions
#  are met:
#
#  1. Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
#  2. Redistributions in binary form must reproduce the above copyright
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
#  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
#  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
#  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
#  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
#  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
#  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
#  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
#  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
#  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
require 'extend/pathname'
require 'extend/ARGV'
require 'utils'

ARGV.extend(HomebrewArgvExtension)

HOMEBREW_VERSION = 0.5
HOMEBREW_WWW = 'http://bit.ly/Homebrew'

if Process.uid == 0
  # technically this is not the correct place, this cache is for *all users*
  # so in that case, maybe we should always use it, root or not?
  HOMEBREW_CACHE=Pathname.new("/Library/Caches/Homebrew")
else
  HOMEBREW_CACHE=Pathname.new("~/Library/Caches/Homebrew").expand_path
end

if not defined? HOMEBREW_BREW_FILE
  HOMEBREW_BREW_FILE = ENV['HOMEBREW_BREW_FILE'] || `which brew`.chomp
end

HOMEBREW_PREFIX = Pathname.new(HOMEBREW_BREW_FILE).dirname.parent # Where we link under
HOMEBREW_REPOSITORY = Pathname.new(HOMEBREW_BREW_FILE).realpath.dirname.parent # Where .git is found

# Where should be build to? 
# If /usr/local/Cellar exists, as a symlink or real folder, use that.
# Otherwise, build into a Cellar in the Repo. folder.
if (HOMEBREW_PREFIX+'Cellar').exist?
  HOMEBREW_CELLAR = HOMEBREW_PREFIX+'Cellar'
else
  HOMEBREW_CELLAR = HOMEBREW_REPOSITORY+'Cellar'
end

MACOS_FULL_VERSION = `/usr/bin/sw_vers -productVersion`.chomp
MACOS_VERSION = /(10\.\d+)(\.\d+)?/.match(MACOS_FULL_VERSION).captures.first.to_f

HOMEBREW_USER_AGENT = "Homebrew #{HOMEBREW_VERSION} (Ruby #{RUBY_VERSION}-#{RUBY_PATCHLEVEL}; Mac OS X #{MACOS_FULL_VERSION})"


class ExecutionError <RuntimeError
  attr :exit_status

  def initialize cmd, args = [], es = nil
    super "Failure while executing: #{cmd} #{pretty(args)*' '}"
    @exit_status = es.exitstatus rescue 1
  end

  private

  def pretty args
    args.collect do |arg|
      if arg.to_s.include? ' '
        "'#{ arg.gsub "'", "\\'" }'"
      else
        arg
      end
    end
  end
end

class BuildError <ExecutionError
end