diff options
Diffstat (limited to 'tool/vcs.rb')
-rw-r--r-- | tool/vcs.rb | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/tool/vcs.rb b/tool/vcs.rb new file mode 100644 index 0000000000..6e86cfb07e --- /dev/null +++ b/tool/vcs.rb @@ -0,0 +1,112 @@ +# vcs + +require 'time' + +ENV.delete('PWD') + +unless File.respond_to? :realpath + require 'pathname' + def File.realpath(arg) + Pathname(arg).realpath.to_s + end +end + +class VCS + class NotFoundError < RuntimeError; end + + @@dirs = [] + def self.register(dir) + @@dirs << [dir, self] + end + + def self.detect(path) + @@dirs.each do |dir, klass| + return klass.new(path) if File.directory?(File.join(path, dir)) + prev = path + loop { + curr = File.realpath(File.join(prev, '..')) + break if curr == prev # stop at the root directory + return klass.new(path) if File.directory?(File.join(curr, dir)) + prev = curr + } + end + raise VCS::NotFoundError, "does not seem to be under a vcs: #{path}" + end + + def initialize(path) + @srcdir = path + super() + end + + # return a pair of strings, the last revision and the last revision in which + # +path+ was modified. + def get_revisions(path) + path = relative_to(path) + last, changed, modified, *rest = Dir.chdir(@srcdir) {self.class.get_revisions(path)} + last or raise "last revision not found" + changed or raise "changed revision not found" + modified &&= Time.parse(modified) + return last, changed, modified, *rest + end + + def relative_to(path) + if path + srcdir = File.realpath(@srcdir) + path = File.realpath(path) + list1 = srcdir.split(%r{/}) + list2 = path.split(%r{/}) + while !list1.empty? && !list2.empty? && list1.first == list2.first + list1.shift + list2.shift + end + if list1.empty? && list2.empty? + "." + else + ([".."] * list1.length + list2).join("/") + end + else + '.' + end + end + + class SVN < self + register(".svn") + + def self.get_revisions(path) + begin + nulldevice = %w[/dev/null NUL NIL: NL:].find {|dev| File.exist?(dev)} + if nulldevice + save_stderr = STDERR.dup + STDERR.reopen nulldevice, 'w' + end + info_xml = `svn info --xml "#{path}"` + ensure + if save_stderr + STDERR.reopen save_stderr + save_stderr.close + end + end + _, last, _, changed, _ = info_xml.split(/revision="(\d+)"/) + modified = info_xml[/<date>([^<>]*)/, 1] + [last, changed, modified] + end + end + + class GIT < self + register(".git") + + def self.get_revisions(path) + logcmd = %Q[git log -n1 --grep="^ *git-svn-id: .*@[0-9][0-9]* "] + idpat = /git-svn-id: .*?@(\d+) \S+\Z/ + last = `#{logcmd}`[idpat, 1] + if path + log = `#{logcmd} "#{path}"` + changed = log[idpat, 1] + modified = `git log --format=%ai -- #{path}` + else + changed = last + end + [last, changed, modified] + end + end +end |