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|
require 'formula'
require 'stringio'
module ScriptDataReader
# This module contains a method for extracting the contents of DATA from a
# Ruby file other than the script containing the currently executing
# function. Many thanks to Glenn Jackman's Stackoverflow answer which
# provided this code:
#
# http://stackoverflow.com/questions/2156629/can-i-access-the-data-from-a-required-script-in-ruby/2157556#2157556
def self.load(filename)
data = StringIO.new
File.open(filename) do |f|
begin
line = f.gets
end until line.nil? or line.match(/^__END__$/)
while line = f.gets
data << line
end
end
data.rewind
data
end
end
module UnpackPatch
def patch
return unless ARGV.flag? "--patch"
begin
old_verbose = $VERBOSE
$VERBOSE = nil
Object.const_set "DATA", ScriptDataReader.load(path)
ensure
$VERBOSE = old_verbose
end
super
end
end
module Homebrew extend self
def unpack_usage; <<-EOS.undent
Usage: brew unpack [-pg] [--destdir=path/to/extract/in] <formulae ...>
Unpack formulae source code for inspection.
Formulae archives will be extracted to subfolders inside the current working
directory or a directory specified by `--destdir`. If the `-p` option is
supplied, patches will also be downloaded and applied. If the `-g` option is
specified a git repository is created and all files added so that you can diff
changes.
EOS
end
def unpack
abort unpack_usage if ARGV.empty?
formulae = ARGV.formulae
raise FormulaUnspecifiedError if formulae.empty?
if (dir = ARGV.value('destdir')).nil?
unpack_dir = Pathname.pwd
else
unpack_dir = Pathname.new(dir)
unpack_dir.mkpath unless unpack_dir.exist?
end
raise "Cannot write to #{unpack_dir}" unless unpack_dir.writable_real?
formulae.each do |f|
f.extend(UnpackPatch)
# Create a nice name for the stage folder.
stage_dir = unpack_dir + [f.name, f.version].join('-')
if stage_dir.exist?
raise "Destination #{stage_dir} already exists!" unless ARGV.force?
rm_rf stage_dir
end
oh1 "Unpacking #{f.name} to: #{stage_dir}"
ENV['VERBOSE'] = '1' # show messages about tar
f.brew { cp_r getwd, stage_dir }
ENV['VERBOSE'] = nil
if ARGV.switch? 'g'
ohai "Setting up git repository"
cd stage_dir
system "git", "init", "-q"
system "git", "add", "-A"
system "git", "commit", "-q", "-m", "brew-unpack"
end
end
end
end
# Here is the actual code that gets run when `brew` loads this external
# command.
Homebrew.unpack
|
