#!/usr/bin/env ruby
#
# Triggers:
#     ForceClientOptions form-in client "ForceRmdir.rb %formfile%
#     [allwrite | noallwrite] [clobber | noclobber] [compress | nocompress]
#     [locked | unlocked] [modtime | nomodtime] [rmdir | normdir]"
#
#
# Examines the "Options:" line of the client form file, and forces the values
# of the options specified in the trigger form to the specified value.
# Unmentioned options are left alone.

if ARGV.length < 1 || !(File.file?(ARGV[0]))
  puts '%formfile% not given.'
  exit 1
end

# New options can be parsed by adding another element to "opts_to_check".
# Follow the same format as the other entries.

opts_to_check = [
                 [/\A(no)?allwrite\z/, false],
                 [/\A(no)?clobber\z/, false],
                 [/\A(no)?compress\z/, false],
                 [/\A(un)?locked\z/, false],
                 [/\A(no)?modtime\z/, false],
                 [/\A(no)?rmdir\z/, false]
                ]

def get_opt(opt, opts_to_check)
  opts_to_check.each do |check|
    return check if (check[0] =~ opt)
  end
  return nil
end

def known_opt?(opt, opts_to_check)
  known_option = get_opt(opt, opts_to_check)
  return (nil != known_option)
end

def duplicate_opt?(opt, opts_to_check)
  known_option = get_opt(opt, opts_to_check)
  if (nil != known_option)
    return (false != known_option[1])
  else
    return false
  end
end

# Parse the command line arguments
for i in 1..ARGV.length-1 do
  opt = ARGV[i]
  if (known_opt?(opt, opts_to_check))
    if (duplicate_opt?(opt, opts_to_check))
      puts "Conflicting option: #{opt}"
      exit 1
    else
      known_option = get_opt(opt, opts_to_check)
      known_option[1] = opt
    end
  else
    puts "Unknown option: #{opt}"
    exit 1
  end
end

formfile = ARGV[0]

form_string = ""
form = File.open(formfile, 'r')

form.each do |line|
  if /^Client:.*p4sandbox-.*$/ =~ line
    exit 0
  elsif /^Options:.*?/ =~ line
    client_choices = line.gsub(/Options:\s+(.*)/, '\1').strip.split(/\s+/)
    options_line = line.gsub(/(Options:\s+).*/, '\1').chomp

    # Parse the "Options" line of the client form and create new "Options" line
    client_choices.each do |opt|
      if (known_opt?(opt, opts_to_check) && duplicate_opt?(opt, opts_to_check))
        known_opt = get_opt(opt, opts_to_check)
        options_line << "#{known_opt[1]} "
      else
        options_line << "#{opt} "
      end
    end

    options_line = options_line.strip << "\n"
    form_string << (options_line)
  else
    form_string << (line)
  end
end

form.close
form = File.open(formfile, 'w')
form.write(form_string)
form.close

exit 0