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class RefreshBrew
RESPOSITORY_URL = 'git://github.com/mxcl/homebrew.git'
CHECKOUT_COMMAND = 'git checkout -q master'
UPDATE_COMMAND = "git pull #{RESPOSITORY_URL} master"
REVISION_COMMAND = 'git log -l -1 --pretty=format:%H 2> /dev/null'
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!
output = ''
in_prefix do
if File.directory? '.git'
safe_system CHECKOUT_COMMAND
else
safe_system "git init"
end
output = execute(UPDATE_COMMAND)
end
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 }
rescue
'TAIL'
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
end
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