github git-compare; opens commits in github's compare feature.

git-compare

#!/usr/bin/env ruby

# ONE-LINE INSTALL INSTRUCTIONS:
# wget --no-check-certificate https://raw.github.com/gist/1065081/git-compare; chmod u+x git-compare; mv git-compare `which git-status | ruby -e "puts STDIN.read.split(/\//)[0..-2].join('/')"`/

$remote = 'origin'

def usage
  puts %(
opens commits in github's compare feature. Commits must be pushed (remote "origin" is default)

  git-compare [options] from_sha to_sha
  
If to_sha is left off, head will be assumed.

Options
  
  -r[remote_name] | use a remote repo other than origin 

Examples:

  $ git compare head^^
  $ git compare 15f3da3..master
  $ git compare -rmainline 15f3da3 master
  )
end

def remote_details
  `git remote show -n #{$remote}`
end

def sha_lookup(reference)
  `git log #{reference} -1 --format="%h"`.chomp
end

def branches
  `git branch | cut -c3-`.chomp.split(/\n/)
end

args = ARGV

if args.size == 0
  usage
  exit
end

# support switching remote
if args.first =~ /^\-r(.*)/
  $remote = $1
  args.shift
end

# support "from_sha..to_sha"
if args.size == 1
  args = args[0].split(/\.{2,3}/)
end

# support "git-compare from_sha", assume "git-compare from_sha..head"
if args.size == 1
  args.push('head')
end

# support vague commit names
args.map!{|arg| sha_lookup(arg) }

remote_details =~ /Push  URL: git@github\.com\:(.+)\/(.+)\.git/
user, repo = $1, $2

system %(open https://github.com/#{user}/#{repo}/compare/#{args.first}...#{args.last})