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update.rb
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update.rb
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require 'cmd/tap'
require 'cmd/untap'
module Homebrew
def update
unless ARGV.named.empty?
abort <<-EOS.undent
This command updates brew itself, and does not take formula names.
Use `brew upgrade <formula>`.
EOS
end
# ensure GIT_CONFIG is unset as we need to operate on .git/config
ENV.delete('GIT_CONFIG')
cd HOMEBREW_REPOSITORY
git_init_if_necessary
tapped_formulae = []
HOMEBREW_LIBRARY.join("Formula").children.each do |path|
next unless path.symlink?
tapped_formulae << path.resolved_path
end
unlink_tap_formula(tapped_formulae)
report = Report.new
master_updater = Updater.new(HOMEBREW_REPOSITORY)
begin
master_updater.pull!
ensure
link_tap_formula(tapped_formulae)
end
report.update(master_updater.report)
# rename Taps directories
# this procedure will be removed in the future if it seems unnecessasry
rename_taps_dir_if_necessary
each_tap do |user, repo|
repo.cd do
updater = Updater.new(repo)
begin
updater.pull!
rescue
onoe "Failed to update tap: #{user.basename}/#{repo.basename.sub("homebrew-", "")}"
else
report.update(updater.report) do |key, oldval, newval|
oldval.concat(newval)
end
end
end
end
# we unlink first in case the formula has moved to another tap
Homebrew.unlink_tap_formula(report.removed_tapped_formula)
Homebrew.link_tap_formula(report.new_tapped_formula)
# automatically tap any migrated formulae's new tap
report.select_formula(:D).each do |f|
next unless (HOMEBREW_CELLAR/f).exist?
migration = TAP_MIGRATIONS[f]
next unless migration
tap_user, tap_repo = migration.split '/'
install_tap tap_user, tap_repo
end if load_tap_migrations
if report.empty?
puts "Already up-to-date."
else
puts "Updated Homebrew from #{master_updater.initial_revision[0,8]} to #{master_updater.current_revision[0,8]}."
report.dump
end
end
private
def git_init_if_necessary
if Dir[".git/*"].empty?
safe_system "git", "init"
safe_system "git", "config", "core.autocrlf", "false"
safe_system "git", "config", "remote.origin.url", "https://github.com/Homebrew/homebrew.git"
safe_system "git", "config", "remote.origin.fetch", "+refs/heads/*:refs/remotes/origin/*"
safe_system "git", "fetch", "origin"
safe_system "git", "reset", "--hard", "origin/master"
end
if `git remote show origin -n` =~ /Fetch URL: \S+mxcl\/homebrew/
safe_system "git", "remote", "set-url", "origin", "https://github.com/Homebrew/homebrew.git"
safe_system "git", "remote", "set-url", "--delete", "origin", ".*mxcl\/homebrew.*"
end
rescue Exception
FileUtils.rm_rf ".git"
raise
end
def rename_taps_dir_if_necessary
need_repair_taps = false
Dir.glob("#{HOMEBREW_LIBRARY}/Taps/*/") do |tapd|
begin
tapd_basename = File.basename(tapd)
if File.directory?(tapd + "/.git")
if tapd_basename.include?("-")
# only replace the *last* dash: yes, tap filenames suck
user, repo = tapd_basename.reverse.sub("-", "/").reverse.split("/")
FileUtils.mkdir_p("#{HOMEBREW_LIBRARY}/Taps/#{user.downcase}")
FileUtils.mv(tapd, "#{HOMEBREW_LIBRARY}/Taps/#{user.downcase}/homebrew-#{repo.downcase}")
need_repair_taps = true
if tapd_basename.count("-") >= 2
opoo "Homebrew changed the structure of Taps like <someuser>/<sometap>. "\
+ "So you may need to rename #{HOMEBREW_LIBRARY}/Taps/#{user.downcase}/homebrew-#{repo.downcase} manually."
end
else
opoo "Homebrew changed the structure of Taps like <someuser>/<sometap>. "\
"#{tapd} is incorrect name format. You may need to rename it like <someuser>/<sometap> manually."
end
end
rescue => ex
onoe ex.message
next # next tap directory
end
end
repair_taps if need_repair_taps
end
def load_tap_migrations
require 'tap_migrations'
rescue LoadError
false
end
end
class Updater
attr_reader :initial_revision, :current_revision, :repository
def initialize(repository)
@repository = repository
end
def pull!
safe_system "git", "checkout", "-q", "master"
@initial_revision = read_current_revision
# ensure we don't munge line endings on checkout
safe_system "git", "config", "core.autocrlf", "false"
args = ["pull"]
args << "--rebase" if ARGV.include? "--rebase"
args << "-q" unless ARGV.verbose?
args << "origin"
# the refspec ensures that 'origin/master' gets updated
args << "refs/heads/master:refs/remotes/origin/master"
reset_on_interrupt { safe_system "git", *args }
@current_revision = read_current_revision
end
def reset_on_interrupt
ignore_interrupts { yield }
ensure
if $?.signaled? && $?.termsig == 2 # SIGINT
safe_system "git", "reset", "--hard", @initial_revision
end
end
def report
map = Hash.new{ |h,k| h[k] = [] }
if initial_revision && initial_revision != current_revision
diff.each_line do |line|
status, *paths = line.split
src, dst = paths.first, paths.last
next unless File.extname(dst) == ".rb"
next unless paths.any? { |p| File.dirname(p) == formula_directory }
case status
when "A", "M", "D"
map[status.to_sym] << repository.join(src)
when /^R\d{0,3}/
map[:D] << repository.join(src) if File.dirname(src) == formula_directory
map[:A] << repository.join(dst) if File.dirname(dst) == formula_directory
end
end
end
map
end
private
def formula_directory
if repository == HOMEBREW_REPOSITORY
"Library/Formula"
elsif repository.join("Formula").directory?
"Formula"
elsif repository.join("HomebrewFormula").directory?
"HomebrewFormula"
else
"."
end
end
def read_current_revision
`git rev-parse -q --verify HEAD`.chomp
end
def diff
Utils.popen_read(
"git", "diff-tree", "-r", "--name-status", "--diff-filter=AMDR",
"-M85%", initial_revision, current_revision
)
end
def `(cmd)
out = super
unless $?.success?
$stderr.puts(out) unless out.empty?
raise ErrorDuringExecution.new(cmd)
end
ohai(cmd, out) if ARGV.verbose?
out
end
end
class Report
def initialize
@hash = {}
end
def fetch(*args, &block)
@hash.fetch(*args, &block)
end
def update(*args, &block)
@hash.update(*args, &block)
end
def empty?
@hash.empty?
end
def dump
# Key Legend: Added (A), Copied (C), Deleted (D), Modified (M), Renamed (R)
dump_formula_report :A, "New Formulae"
dump_formula_report :M, "Updated Formulae"
dump_formula_report :D, "Deleted Formulae"
end
def tapped_formula_for key
fetch(key, []).select { |path| HOMEBREW_TAP_PATH_REGEX === path.to_s }
end
def new_tapped_formula
tapped_formula_for :A
end
def removed_tapped_formula
tapped_formula_for :D
end
def select_formula key
fetch(key, []).map do |path|
case path.to_s
when HOMEBREW_TAP_PATH_REGEX
"#{$1}/#{$2.sub("homebrew-", "")}/#{path.basename(".rb")}"
else
path.basename(".rb").to_s
end
end.sort
end
def dump_formula_report key, title
formula = select_formula(key)
unless formula.empty?
ohai title
puts_columns formula
end
end
end