Simple ruby script to launch Github in chrome from a mac (which could be parameterized) to a particular page for the repository that you're currently on in your shell. Feel free to tweak and improve to your heat's content.

gistfile1.rb

#!/usr/bin/env ruby


remote = ARGV[0]
branch = ARGV[1] || '.'
page   = ARGV[2] || 'tree'


# Ensure we're in a git repo
unless Dir.glob('.*').include?('.git')
  puts "Must be in a git repo"
  exit 1
end


# Validate remote
unless remote
  puts "\nusage:\n"
  puts "  gitgo [remote] {branch|page} {page}"
  exit 0
end

unless `git remote -v | grep fetch`.include?(remote)
  puts "Invalid remote.  Options are:"
  puts `git remote -v`
  exit 1
end



# Get the branch
if ['tree', 'commits', 'releases', 'pulls'].include?(branch)
  # Prompt to confirm if page is actually a branch
  #puts "Is '#{branch}' a page? [y,n]"
  #is_page = STDIN.gets.chomp()
  
  #if is_page == 'y'
    page = branch
    branch = `git branch | awk '/\\*/ { print $2; }'`.delete("\n")
  #end
elsif branch == '.'
  branch = `git branch | awk '/\\*/ { print $2; }'`.delete("\n")
end



# Don't set a branch if hitting certain pages
if ['pulls', 'releases'].include?(page)
  branch = nil
end


# Get the uri of the remote passed
remote_uri = `git remote -v | grep fetch | awk '/#{remote}/ { print $2; }'`.delete("\n")

# Massage it if it's ssh
if remote_uri.include?('git@github')
  remote_uri.gsub!("git@github.com:","https://github.com/")
end


# Built the full url
full_url = remote_uri.gsub(".git","/#{page}/#{branch}")


# Launch Chrome
system("open /Applications/Google\\ Chrome.app #{full_url}")