#
# Tasks to keep your repository in sync with your Chef Server
#
# Author:: Matthew Kent (<mkent@magoazul.com>)
# Copyright:: Copyright (c) 2010 Matthew Kent
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

require 'moneta'
require 'moneta/basic_file'

REPO_ROOT = File.expand_path(File.join(File.dirname(__FILE__), '..'))

COOKBOOK_CACHE = File.join(REPO_ROOT, ".rake_update_cache/cookbooks")
COOKBOOK_SEARCH = File.join(REPO_ROOT, "{cookbooks,site-cookbooks}/**/*")

ROLES_CACHE = File.join(REPO_ROOT, ".rake_update_cache/roles")
ROLES_SEARCH = File.join(REPO_ROOT, "roles/*.rb")

desc "Upload cookbooks altered since last sync_cookbooks"
task :sync_cookbooks do
  ran_once = false

  # gather cookbooks => files associations
  cookbooks = {}
  Dir.glob(COOKBOOK_SEARCH).each do |file|
    if File.file?(file)
      if file =~ %r{#{REPO_ROOT}/(.*?/(.*?)/.*)}      
        relative = $1
        cookbook = $2
        if cookbooks[cookbook]
          cookbooks[cookbook] << relative 
        else
          cookbooks[cookbook] = [ relative ]
        end
      end
    end
  end

  cache = Moneta::BasicFile.new(:path => COOKBOOK_CACHE)

  cookbooks.each do |cookbook, files|
    update = false
    knife_has_run = false

    files.each do |file|
      mtime = File.stat(File.expand_path(File.join(REPO_ROOT, file))).mtime
      key = "cookbook-#{file.gsub(/(#{File::SEPARATOR}|\.)/, '-')}"

      if cache[key]
        if mtime > cache[key]
          puts "cookbook[#{cookbook}] #{file} has been updated"
          update = true
        end
      else
        puts "cookbook[#{cookbook}] #{file} is new"
        update = true
      end

      if update
        # We only run the upload once as it's per cookbook but prior to setting
        # the cache key, so if it bails out we run correctly next time
        unless knife_has_run
          sh "knife cookbook upload #{cookbook}"
          knife_has_run = true
          ran_once = true
        end
        cache[key] = mtime
      end
    end

  end

  unless ran_once
    puts "No new or updated cookbooks"
  end
end

desc "Update roles altered since last sync_roles"
task :sync_roles do
  ran_once = false

  current_files = []
  Dir.glob(ROLES_SEARCH).each do |file|
    if File.file?(file)
      if file =~ %r{#{REPO_ROOT}/(.*)}      
        current_files << $1 
      end
    end
  end

  cache = Moneta::BasicFile.new(:path => ROLES_CACHE)

  current_files.each do |file|
    mtime = File.stat(File.expand_path(File.join(REPO_ROOT, file))).mtime
    key = "role-#{file.gsub(/(#{File::SEPARATOR}|\.)/, '-')}"

    if cache[key]
      if mtime > cache[key]
        puts "role[#{file}] has been updated"
        update = true
      end
    else
      puts "role[#{file}] is new"
      update = true
    end

    if update
      sh "knife role from file #{file}"
      cache[key] = mtime
      ran_once = true
    end
  end

  unless ran_once
    puts "No new or updated roles"
  end
end

desc "Sync updated cookbooks and roles"
task :sync => [ :sync_cookbooks, :sync_roles ]