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|
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 @loaded || @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
|
