Quick script to open GitHub pages for the repository in the working directory.

gh.rb

#!/usr/bin/ruby

require 'rubygems'
require 'grit'

begin
    r = Grit::Repo.new Dir.pwd
rescue
    puts "Did not detect git repository"
    exit
end

def repo_descriptor
    descrip = %x{git remote -v}.match(/^.+git@github\.com:(.+\/.+)\.git/)
    if descrip.nil?
        puts "Could not find github remote"
        exit
    end
    descrip[1]
end

def url_base
    "https://github.com/#{repo_descriptor}"
end

# open a url relative to current repository github URL
#
def gh_open(path)
    %x{open #{url_base}#{path}}
end

command = unless ARGV[0].nil?
              ARGV[0]
          else
              'open'
          end

case command
when 'open', 'o'
  branch = if ARGV[1].nil?
               r.head.name
           else
               ARGV[1]
           end
  gh_open "/tree/#{branch}"

when 'diff', 'd'
    if ARGV[1].nil?
      puts 'Missing branch to diff with'
      exit
    end

    # optionaly provide two branches to compare
    unless ARGV[2].nil?
        current = ARGV[1]
        other = ARGV[2]
    else # otherwise compare to current branch
        current = r.head.name
        other = ARGV[1]
    end

    gh_open "/compare/#{other}...#{current}"

when 'commits', 'c'
    branch = if ARGV[1].nil?
                 r.head.name
             else
                 ARGV[1]
             end
    gh_open "/commits/#{branch}"

when 'commit', 'sha'
    if ARGV[1].nil?
        puts 'Missing commit id'
        exit
    end
    commit_hash = ARGV[1]
    gh_open "/commit/#{commit_hash}"

when 'tree'
    if ARGV[1].nil?
        puts 'Missing tree id'
        exit
    end
    tree_hash = ARGV[1]
    gh_open "/tree/#{tree_hash}"

when 'network', 'n'
    gh_open '/network'

when 'branches', 'b'
    gh_open '/branches'

when 'pulls'
    gh_open '/pulls'

else
    puts 'Unknown command'

end