#!/usr/bin/env ruby

# git.rb - a P4 shim that pretends to be Git so that it can work with Xcode
# entirely experimental: here be dragons

require 'fileutils'

begin

    p4 = '/usr/local/bin/p4'

    # require a P4 URI because it's my tool
    # URIs are of the form [username@]p4://<hostname[:port]/<depot path>
	case ARGV[0]
    when 'clone'
        matches = /(.+?)@p4:\/\/(.+?)\/(.*)|p4:\/\/(.+?)\/(.*)/.match(ARGV[1])
        
        user = matches.captures[0]
        port = matches.captures[1] || matches.captures[3]
        path = matches.captures[2] || matches.captures[4]

        # let's be civilized and not require a port
        if port !~ /:\d*/
            port = port + ":1666"
        end

        cmd = "#{p4} -d #{ARGV[2]}"
        cmd += " -u #{user}" if user

        `#{cmd} clone -p #{port} -f //#{path}`
        FileUtils.mkdir_p "ARGV[2]/.git/info"
    when 'init'
        puts "#{p4} init"
        FileUtils.mkdir_p '.git/info'
    when 'add'
        `#{p4} rec`
    when 'status'
        results = `#{p4} -ztag -F '%change% %action% %localFile%' status`

        results.each_line do |r|
            if r.start_with?(' add ')
                puts "?? #{r.split(' ')[1]}"
            elsif r.start_with?('default add ')
                puts "A  #{r.split(' ')[2]}"
            elsif r.start_with?(' edit ')
                puts " M #{r.split(' ')[1]}"
            elsif r.start_with?('default edit ')
                puts "M  #{r.split(' ')[2]}"
            elsif r.start_with?(' delete ')
                puts " D #{r.split(' ')[1]}"
            elsif r.start_with?('default delete ')
                puts "D  #{r.split(' ')[2]}"
            end
        end
    when 'branch'
        results = `#{p4} switch`
        puts '* ' + results
    when 'mv'
        puts "#{p4} edit #{ARGV[1]}"
        puts "#{p4} move #{ARGV[1]} #{ARGV[2]}"
    when 'rm'
        if ARGV[1] == '-f' && ARGV[2] == '-r'  && ARGV[3] == '--'
            ARGV[4..-1].each do |f|
                "#{p4} delete #{f}"
                "#{p4} delete #{f}/..."
            end
        end
    when 'commit'
        puts 'p4 submit'
    when 'checkout'
        puts 'p4 switch'
    when 'blame'
        puts 'p4 annotate'
    when 'archive'
        puts 'lots of stuff'
    when 'log'
        puts 'p4 changes'
    when 'config' && ARGV[1] == '--get'
        if ARGV[2] == 'branch.default.remote'
            puts 'default'
        elsif ARGV[2] == 'branch.default.merge'
            puts 'refs/heads/default'
        end
    when 'remote'
        puts "default\x09http://xxxxx (fetch)"
        puts "default\x09http://xxxxx (push)"
    when 'remote-ls'
        puts '8854794d9d2d44170abe943b22ff7f8d647a0b4e refs/heads/default'
    end
        
end