Robot Has No Heart

Xavier Shay blogs here

A robot that does not have a heart

Packaging with Rake

Automated the packaging process for winchester this morning use rake, the ruby build system. A few hurdles to jump, but I can now package up a release on either linux or windows with one line.

First trick was to determine the output executable of rubyscript2exe, since I couldn’t find a way to configure it, and also the desired extension for the platform:

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if RUBY_PLATFORM =~ /linux/
  insuffix = '_linux'
  outsuffix = ''
elsif RUBY_PLATFORM =~ /mswin32/
  insuffix = '.exe'
  outsuffix = '.exe'
else
  puts 'Unsupported platform!'
  exit
end

I decided to get fancy and automagically determine the release suffix based on the current directory (trunk, dev-r1). This can be overriden by an environment variable. I’d like to add some special processing here so trunk builds also get the subversion revision number attached to them.

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class String
  def tail key
    i = self.reverse.index(key)
    return nil if i == nil
    return self[-1 * i, self.length - i]
  end
end
release_suffix = ENV["RELEASE_SUFFIX"] ? ENV["RELEASE_SUFFIX"] : '-' + Dir.getwd.tail('/')

And finally I used the ruby-zip package to create a zip file, in the process adding a convenient ‘add_dir’ method to ZipFile to recurse a directory and add the contents.

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require 'zip/zip'
module Zip
  class ZipFile
    def add_dir entry, src
      self.mkdir(entry)
      Dir.foreach(src) do |fn|
        if fn[0] != '.'[0]
          if File.directory?(src + fn)
            self.add_dir(entry + '/' + fn, src + fn + '/')
          else
            self.add(entry + '/' + fn, src + fn)
          end
        end
      end
    end
  end
end
Zip::ZipFile.open('build/' + app_name + release_suffix + '.zip', Zip::ZipFile::CREATE) do |zf|
  zf.add(app_name + outsuffix, 'build/tmp/' + app_name + outsuffix)
  zf.add_dir('res', 'build/tmp/res/')
end
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