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Script to convert a Rails/Redmine plugin to a RubyGem

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plugin_to_gem.rb
Ruby
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#!/usr/bin/env ruby
# Usage:
# ruby plugin_to_gem.rb my_plugin_directory
require 'fileutils'
 
@plugin_dir = ARGV[0]
@plugin_name = ARGV[0]
 
def rakefile_content
description = 'TODO'
redmine_init_content = File.read('init.rb')
if redmine_init_content.match(/description (.*$)/)
description = $1.gsub("'",'').gsub('"','')
end
 
content =<<-EORAKE
begin
require 'jeweler'
Jeweler::Tasks.new do |s|
s.name = "#{@plugin_name}"
s.summary = "#{description}"
s.email = "edavis@littlestreamsoftware.com"
s.homepage = "https://projects.littlestreamsoftware.com/projects/TODO"
s.description = "#{description}"
s.authors = ["Eric Davis"]
s.rubyforge_project = "#{@plugin_name}" # TODO
s.files = FileList[
"[A-Z]*",
"init.rb",
"rails/init.rb",
"{bin,generators,lib,test,app,assets,config,lang}/**/*",
'lib/jeweler/templates/.gitignore'
]
end
Jeweler::GemcutterTasks.new
Jeweler::RubyforgeTasks.new do |rubyforge|
rubyforge.doc_task = "rdoc"
end
rescue LoadError
puts "Jeweler, or one of its dependencies, is not available. Install it with: sudo gem install technicalpickles-jeweler -s http://gems.github.com"
end
 
EORAKE
end
 
FileUtils.cd(@plugin_dir, :verbose => true) do |dir|
system('rake clean')
system('git status')
system('git checkout master')
system('git merge origin/master')
system('git checkout -b gem')
 
# Rakefile
File.open('Rakefile','a') do |file|
file.puts(rakefile_content)
end
system('git commit -am "Updated rakefile for jeweler"')
 
# VERSION
File.open('VERSION','w') do |version_file|
redmine_init_content = File.read('init.rb')
if redmine_init_content.match(/version (.*$)/)
version = $1.gsub("'",'').gsub('"','')
version_file.puts version
end
end
system('git add VERSION')
system('git commit -am "Added Version file"')
 
# Rails GemPlugin init.rb
FileUtils.mkdir_p('rails')
system('git mv init.rb rails/init.rb')
File.open('init.rb','w') do |init_file|
init_file.puts('require File.dirname(__FILE__) + "/rails/init"')
end
system('git add init.rb')
system('git commit -am "Added init file for Rails GemPlugin"')
 
 
 
# Gemspec
system('rake gemspec')
system("git add #{@plugin_name}.gemspec")
system('git commit -am "Added generated gemspec"')
 
# Install to test
system('rake install')
 
# Back to master to allow merging
system('git checkout master')
end

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