post-checkout hook to recursively checkout Git gem dependencies in Gemfile.lock

post-checkout

#!/usr/bin/env ruby

exit 0 if ARGV[0] == ARGV[1] # Not switching branches

require 'rubygems'
require 'bundler'
require 'pathname'

root = Pathname(Dir.getwd)

lockfile = File.read('Gemfile.lock')
Bundler::LockfileParser.new(lockfile).sources.each do |source|
  next unless source.respond_to? :uri
  next unless source.uri =~ /ifad\//

  $stdout.print "[#{source.uri}] "
  $stdout.flush

  rev = source.send(:revision)
  dir = source.uri.scan(/\/([\w_-]+)\.git$/).to_s
  dir = root.join('..', dir)

  Dir.chdir dir

  %x{ git co #{rev} }
  %x{ symlink-gem #{dir} }
end

symlink-gem.sh

#!/bin/sh

if [ -z "$GEM_HOME" ]; then
  echo 'Please define $GEM_HOME first'
  exit -1
fi

if [ -z "$gem" ]; then
  echo "Usage: $0 <gemdir>"
  exit 1
fi

if [ ! -d "$gem" ]; then
  echo "Gem $gem not exist"
  exit 2
fi

name=`basename $gem`

cd $gem
ref=`git describe`
commit=`git rev-parse --short=12 ${ref:=HEAD}`

cd $GEM_HOME/bundler/gems
rm -rf $name-*
ln -s $gem $name-$commit

echo "Created $name-$commit"