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require 'formula'
module Homebrew extend self
def versions
raise "Please `brew install git` first" unless which "git"
raise "Please `brew update' first" unless (HOMEBREW_REPOSITORY/".git").directory?
raise FormulaUnspecifiedError if ARGV.named.empty?
ARGV.formulae.all? do |f|
if ARGV.include? '--compact'
puts f.versions * " "
else
f.versions do |version, sha|
print Tty.white.to_s
print "#{version.ljust(8)} "
print Tty.reset.to_s
puts "git checkout #{sha} #{f.pretty_relative_path}"
end
end
end
end
end
class Formula
def versions
versions = []
rev_list.each do |sha|
version = version_for_sha sha
unless versions.include? version or version.nil?
yield version, sha if block_given?
versions << version
end
end
return versions
end
def pretty_relative_path
if Pathname.pwd == HOMEBREW_REPOSITORY
"Library/Formula/#{name}.rb"
else
"#{HOMEBREW_REPOSITORY}/Library/Formula/#{name}.rb"
end
end
private
def rev_list
HOMEBREW_REPOSITORY.cd do
`git rev-list --abbrev-commit HEAD -- Library/Formula/#{name}.rb`.split
end
end
def text_from_sha sha
HOMEBREW_REPOSITORY.cd do
`git cat-file blob #{sha}:Library/Formula/#{name}.rb`
end
end
def sha_for_version version
rev_list.find{ |sha| version == version_for_sha(sha) }
end
def version_for_sha sha
mktemp do
path = Pathname.new(Pathname.pwd+"#{name}.rb")
path.write text_from_sha(sha)
# Unload the class so Formula#version returns the correct value
# FIXME shouldn't have to do this?
begin
version = nostdout { Formula.factory(path).version }
Object.send(:remove_const, Formula.class_s(name))
version
rescue SyntaxError, TypeError, NameError, ArgumentError
# We rescue these so that we can skip bad versions and
# continue walking the history
nil
end
end
end
end
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