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#!/usr/bin/env ruby
#
# Create a chunk morphology to integrate Omnibus software in Baserock
#
# Copyright (C) 2014 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
require 'bundler'
require 'omnibus'
require 'optparse'
require 'rubygems/commands/install_command'
require 'shellwords'
require 'yaml'
TARGET_PROJECT = 'chefdk' # should come from args
TARGET_SOFTWARE = 'chefdk' # should come from args
class Omnibus::Builder
# It's possible to use `gem install` in build commands, which is a great
# way of subverting the dependency tracking Omnibus provides. It's done
# in `omnibus-chef/config/software/chefdk.rb`, for example.
#
# To handle this, here we extend the class that executes the build commands
# to detect when `gem install` is run. It uses the Gem library to turn the
# commandline back into a Bundler::Dependency object that we can use.
class GemInstallCommandParser < Gem::Commands::InstallCommand
def dependency_list_from_commandline(args)
handle_options args
options[:args].collect do |gem_name|
Bundler::Dependency.new(gem_name, options[:version])
end
end
end
def gem(command, options = {})
# This function implements the 'gem' function in the build-commands DSL.
if command.match /^install/
parser = GemInstallCommandParser.new
args = Shellwords.split(command).drop(1)
gems = parser.dependency_list_from_commandline(args)
manually_installed_rubygems.concat gems
end
end
def manually_installed_rubygems
@manually_installed_rubygems ||= []
end
end
class OmnibusChunkMorphologyGenerator
def deps_for_software(software)
deps = Hash.new
software.dependencies.each do |dep|
deps[dep] = 0
end
software.builder.manually_installed_rubygems.each do |dep|
deps[dep.name] = dep.requirement.to_s
end
deps
end
def generate_chunk_morph_for_software(software)
{
"name" => software.name,
"kind" => "chunk",
# Possibly this tool should look at software.build and
# generate suitable configure, build and install-commands.
# For now: don't bother!
# FIXME: are these build or runtime dependencies? We'll assume both.
"x-build-dependencies-omnibus" => deps_for_software(software),
"x-runtime-dependencies-omnibus" => deps_for_software(software),
}
end
def write_morph(file, morph)
file.write(YAML.dump(morph))
end
def run
project = Omnibus::Project.load(TARGET_PROJECT)
software = Omnibus::Software.load(project, TARGET_SOFTWARE)
morph = generate_chunk_morph_for_software(software)
write_morph(STDOUT, morph)
end
end
OmnibusChunkMorphologyGenerator.new.run
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