diff options
Diffstat (limited to 'railties/lib/rails')
| -rw-r--r-- | railties/lib/rails/gem_dependency.rb | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/railties/lib/rails/gem_dependency.rb b/railties/lib/rails/gem_dependency.rb new file mode 100644 index 0000000000..ed16464887 --- /dev/null +++ b/railties/lib/rails/gem_dependency.rb @@ -0,0 +1,78 @@ +module Rails + class GemDependency + attr_accessor :name, :requirement, :version, :lib, :source + + def self.unpacked_path + @unpacked_path ||= File.join(RAILS_ROOT, 'vendor', 'gems') + end + + def initialize(name, options = {}) + @name = name.to_s + if options[:version] + @requirement = Gem::Requirement.create(options[:version]) + @version = @requirement.requirements.first.last + end + @lib = options[:lib] + @source = options[:source] + @loaded = false + @load_paths_added = false + @unpack_directory = nil + end + + def add_load_paths + return if @loaded || @load_paths_added + unpacked_paths = Dir[File.join(self.class.unpacked_path, "#{@name}-#{@version || "*"}")] + if unpacked_paths.empty? + args = [@name] + args << @requirement.to_s if @requirement + gem *args + else + $LOAD_PATH << File.join(unpacked_paths.first, 'lib') + end + @load_paths_added = true + rescue Gem::LoadError + puts $!.to_s + end + + def load + return if @load_paths_added == false + require(@lib || @name) + @loaded = true + rescue LoadError + puts $!.to_s + $!.backtrace.each { |b| puts b } + end + + def loaded? + @loaded + end + + def load_paths_added? + @load_paths_added + end + + def install + Gem::GemRunner.new.run(install_command) + end + + def unpack_to(directory) + FileUtils.mkdir_p directory + Dir.chdir directory do + Gem::GemRunner.new.run(unpack_command) + end + end + + def install_command + cmd = %w(install) << @name + cmd << "--version" << "#{@requirement.to_s}" if @requirement + cmd << "--source" << @source if @source + cmd + end + + def unpack_command + cmd = %w(unpack) << @name + cmd << "--version" << "#{@requirement.to_s}" if @requirement + cmd + end + end +end
\ No newline at end of file |