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module Homebrew extend self
def update
abort "Please `brew install git' first." unless system "/usr/bin/which -s git"
updater = RefreshBrew.new
if updater.update_from_masterbrew!
updater.report
else
puts "Already up-to-date."
end
end
end
class RefreshBrew
REPOSITORY_URL = "http://github.com/mxcl/homebrew.git"
CHECKOUT_COMMAND = "git checkout -q master"
UPDATE_COMMAND = "git pull #{REPOSITORY_URL} master"
REVISION_COMMAND = "git rev-parse HEAD"
DIFF_COMMAND = "git diff-tree -r --name-status -z %s %s"
FORMULA_DIR = 'Library/Formula/'
EXAMPLE_DIR = 'Library/Contributions/examples/'
attr_reader :added_formulae, :updated_formulae, :deleted_formulae, :installed_formulae
attr_reader :added_examples, :updated_examples, :deleted_examples
attr_reader :initial_revision, :current_revision
def initialize
@added_formulae, @updated_formulae, @deleted_formulae, @installed_formulae = [], [], [], []
@added_examples, @updated_examples, @deleted_examples = [], [], []
@initial_revision, @current_revision = nil
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!
HOMEBREW_REPOSITORY.cd do
if git_repo?
safe_system CHECKOUT_COMMAND
@initial_revision = read_revision
else
begin
safe_system "git init"
safe_system "git fetch #{REPOSITORY_URL}"
safe_system "git reset FETCH_HEAD"
rescue Exception
safe_system "rm -rf .git"
raise
end
end
execute(UPDATE_COMMAND)
@current_revision = read_revision
end
if initial_revision && initial_revision != current_revision
# hash with status characters for keys:
# Added (A), Copied (C), Deleted (D), Modified (M), Renamed (R)
@changes_map = Hash.new {|h,k| h[k] = [] }
changes = HOMEBREW_REPOSITORY.cd do
execute(DIFF_COMMAND % [initial_revision, current_revision]).split("\0")
end
while status = changes.shift
file = changes.shift
@changes_map[status] << file
end
if @changes_map.any?
@added_formulae = changed_items('A', FORMULA_DIR)
@deleted_formulae = changed_items('D', FORMULA_DIR)
@updated_formulae = changed_items('M', FORMULA_DIR)
@added_examples = changed_items('A', EXAMPLE_DIR)
@deleted_examples = changed_items('D', EXAMPLE_DIR)
@updated_examples = changed_items('M', EXAMPLE_DIR)
@installed_formulae = HOMEBREW_CELLAR.children.
select{ |pn| pn.directory? }.
map{ |pn| pn.basename.to_s }.sort if HOMEBREW_CELLAR.directory?
return true
end
end
# assume nothing was updated
return false
end
def git_repo?
File.directory? '.git'
end
def pending_formulae_changes?
!@updated_formulae.empty?
end
def pending_new_formulae?
!@added_formulae.empty?
end
def deleted_formulae?
!@deleted_formulae.empty?
end
def pending_examples_changes?
!@updated_examples.empty?
end
def pending_new_examples?
!@added_examples.empty?
end
def deleted_examples?
!@deleted_examples.empty?
end
def report
puts "Updated Homebrew from #{initial_revision[0,8]} to #{current_revision[0,8]}."
## New Formulae
if pending_new_formulae?
ohai "The following formulae are new:"
puts_columns added_formulae
end
## Deleted Formulae
if deleted_formulae?
ohai "The following formulae were removed:"
puts_columns deleted_formulae, installed_formulae
end
## Updated Formulae
if pending_formulae_changes?
ohai "The following formulae were updated:"
puts_columns updated_formulae, installed_formulae
end
## New examples
if pending_new_examples?
ohai "The following external commands are new:"
puts_columns added_examples
end
## Deleted examples
if deleted_examples?
ohai "The following external commands were removed:"
puts_columns deleted_examples
end
## Updated Formulae
if pending_examples_changes?
ohai "The following external commands were updated:"
puts_columns updated_examples
end
end
private
def read_revision
execute(REVISION_COMMAND).chomp
end
def filter_by_directory(files, dir)
files.select { |f| f.index(dir) == 0 }
end
def basenames(files)
files.map { |f| File.basename(f, '.rb') }
end
# extracts items by status from @changes_map
def changed_items(status, dir)
basenames(filter_by_directory(@changes_map[status], dir)).sort
end
def execute(cmd)
out = `#{cmd}`
if $? && !$?.success?
$stderr.puts out
raise "Failed while executing #{cmd}"
end
ohai(cmd, out) if ARGV.verbose?
out
end
end
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