Automatically include meta-buildpack as dependency for decorators

Fixes #143

sample/src/build.sh

@@ -36,4 +36,7 @@ pip install --no-binary :all: --download vendor -r requirements.txt
 zip -r "${RESOURCES_DIR}/app.zip" *
 
 cd "${BUILDPACK_DIR}"
-zip -r "${RESOURCES_DIR}/buildpack.zip" *
+zip -r "${RESOURCES_DIR}/buildpack.zip" bin/detect bin/compile bin/release
+
+cd "${BUILDPACK_DIR}"
+zip -r "${RESOURCES_DIR}/decorator.zip" bin/detect bin/compile bin/decorate

sample/src/buildpack/bin/decorate

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# bin/decorate <build-dir>
+
+# tile-generator
+#
+# Copyright (c) 2015-Present Pivotal Software, Inc. All Rights Reserved.
+#
+# 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.
+
+exit 1

sample/tile.yml

@@ -162,6 +162,10 @@ packages:
   buildpack_order: 99                 # 99 (or higher) means go to the end of the list
   path: resources/buildpack.zip
 
+- name: noop-decorator                # A decorator buildpack
+  type: decorator
+  path: resources/decorator.zip
+
 - name: app3
   type: docker-app
   image: guidowb/sample-cf-app        # Start command must be specified in the Dockerfile (CMD)

tile_generator/config.py

@@ -145,7 +145,7 @@ def normalize_jobs(self):
 			for job in release.get('jobs', []):
 				job['type'] = job.get('type', job['name'])
 				job['template'] = job.get('template', job['type'])
-	
+
 	def release_for_package(self, package):
 		release_name = package['name'] if package.get('is_bosh_release', False) else self['name']
 		release = self.release_by_name(release_name)
@@ -233,23 +233,25 @@ def add_dependencies(self):
 				'name': 'docker-boshrelease',
 				'path': 'https://bosh.io/d/github.com/cf-platform-eng/docker-boshrelease' + version_param,
 			}]
-		# if requires_meta_buildpack:
-		# 	self['releases'] += [{
-		# 		'name': 'meta-buildpack',
-		# 		'path': 'github://cf-platform-eng/meta-buildpack/meta-buildpack.tgz',
-		# 		'jobs': [
-		# 			{
-		# 				'name': 'deploy-all',
-		# 				'type': 'deploy-all',
-		# 				'is_errand': True
-		# 			},
-		# 			{
-		# 				'name': 'delete-all',
-		# 				'type': 'delete-all',
-		# 				'is_errand': True
-		# 			}
-		# 		]
-		# 	}]
+		if requires_meta_buildpack:
+			self['releases'] += [{
+				'name': 'meta-buildpack',
+				'path': 'github://cf-platform-eng/meta-buildpack/meta-buildpack.tgz',
+				'jobs': [
+					{
+						'name': 'deploy-meta-buildpack',
+						'type': 'deploy-all',
+						'lifecycle': 'errand',
+						'post_deploy': True
+					},
+					{
+						'name': 'delete-meta-buildpack',
+						'type': 'delete-all',
+						'lifecycle': 'errand',
+						'pre_delete': True
+					}
+				]
+			}]
 
 	def save_history(self):
 		with open(HISTORY_FILE, 'wb') as history_file: