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# 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.
#
class RefreshBrew
CHECKOUT_COMMAND = 'git checkout master'
UPDATE_COMMAND = 'git pull origin master'
REVISION_COMMAND = 'git log -l -1 --pretty=format:%H'
GIT_UP_TO_DATE = 'Already up-to-date.'
formula_regexp = 'Library/Formula/(.+?)\.rb'
ADDED_FORMULA = %r{^\s+create mode \d+ #{formula_regexp}$}
UPDATED_FORMULA = %r{^\s+#{formula_regexp}\s}
attr_reader :added_formulae, :updated_formulae
def initialize
@added_formulae, @updated_formulae = [], []
end
# Performs an update of the homebrew source. Returns +true+ if a newer
# version was available, +false+ if already up-to-date.
def update_from_masterbrew!
git_checkout_masterbrew!
output = git_pull!
output.split("\n").reverse.each do |line|
case line
when ADDED_FORMULA
@added_formulae << $1
when UPDATED_FORMULA
@updated_formulae << $1 unless @added_formulae.include?($1)
end
end
@added_formulae.sort!
@updated_formulae.sort!
output.strip != GIT_UP_TO_DATE
end
def pending_formulae_changes?
!@updated_formulae.empty?
end
def current_revision
in_prefix { execute(REVISION_COMMAND).strip }
end
private
def in_prefix
Dir.chdir(HOMEBREW_REPOSITORY) { yield }
end
def execute(cmd)
out = `#{cmd}`
unless $?.success?
puts out
raise "Failed while executing #{cmd}"
end
ohai(cmd, out) if ARGV.verbose?
out
end
def git_checkout_masterbrew!
in_prefix { execute CHECKOUT_COMMAND }
end
def git_pull!
in_prefix { execute UPDATE_COMMAND }
end
end
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