#!/usr/bin/env ruby

## git-show-merges: a simple script to show you which topic branches have

## been merged into the current branch, and which haven't. (Or, specify

## the set of merge branches you're interested in on the command line.)

##

## git-show-merges Copyright 2008 William Morgan <wmorgan-git-wt-add@masanjin.net>.

## This program is free software: you can redistribute it and/or modify

## it under the terms of the GNU General Public License as published by

## the Free Software Foundation, either version 3 of the License, or (at

## your option) any later version.

##

## This program is distributed in the hope that it will be useful,

## but WITHOUT ANY WARRANTY; without even the implied warranty of

## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

## GNU General Public License for more details.

##

## You can find the GNU General Public License at:

## http://www.gnu.org/licenses/

heads = if ARGV.empty?

[`git symbolic-ref HEAD`.chomp]

else

ARGV

end.map { |r| r.gsub(/refs\/heads\//, "") }

branches = `git show-ref --heads`.

scan(/^\S+ refs\/heads\/(\S+)$/).

map { |a| a.first }

unknown = heads - branches

unless unknown.empty?

$stderr.puts "Unknown branch: #{unknown.first}"

exit(-1)

end

branches -= heads

heads.each do |h|

merged = branches.select { |b| `git log #{h}..#{b}` == "" }

unmerged = branches - merged

puts "merged into #{h}:"

merged.each { |b| puts " #{b}" }

puts

puts "not merged into #{h}: "

unmerged.each { |b| puts " #{b}" }

puts

end