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|
#!/usr/bin/env ruby
ENV.delete('PWD')
require 'optparse'
unless File.respond_to? :realpath
require 'pathname'
def File.realpath(arg)
Pathname(arg).realpath.to_s
end
end
Program = $0
class VCS
class NotFoundError < RuntimeError; end
@@dirs = []
def self.register(dir)
@@dirs << [dir, self]
end
def self.detect(path)
@@dirs.sort.reverse_each do |dir, klass|
return klass.new(path) if File.directory?("#{path}/#{dir}")
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, *rest = Dir.chdir(@srcdir) {self.class.get_revisions(path)}
last or raise "last revision not found"
changed or raise "changed revision not found"
return last, changed, *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+)"/)
[last, changed]
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]
changed = path ? `#{logcmd} "#{path}"`[idpat, 1] : last
[last, changed]
end
end
end
@output = nil
def self.output=(output)
if @output and @output != output
raise "you can specify only one of --changed, --revision.h and --doxygen"
end
@output = output
end
@suppress_not_found = false
srcdir = nil
parser = OptionParser.new {|opts|
opts.on("--srcdir=PATH", "use PATH as source directory") do |path|
srcdir = path
end
opts.on("--changed", "changed rev") do
self.output = :changed
end
opts.on("--revision.h", "RUBY_REVISION macro") do
self.output = :revision_h
end
opts.on("--doxygen", "Doxygen format") do
self.output = :doxygen
end
opts.on("-q", "--suppress_not_found") do
@suppress_not_found = true
end
}
parser.parse! rescue abort "#{File.basename(Program)}: #{$!}\n#{parser}"
srcdir = srcdir ? srcdir : File.dirname(File.dirname(Program))
begin
vcs = VCS.detect(srcdir)
rescue VCS::NotFoundError => e
abort "#{File.basename(Program)}: #{e.message}" unless @suppress_not_found
else
begin
last, changed = vcs.get_revisions(ARGV.shift)
rescue => e
abort "#{File.basename(Program)}: #{e.message}" unless @suppress_not_found
exit false
end
end
case @output
when :changed, nil
puts changed
when :revision_h
puts "#define RUBY_REVISION #{changed.to_i}"
when :doxygen
puts "r#{changed}/r#{last}"
else
raise "unknown output format `#{@output}'"
end
|
