feat: Add new gcloud commands, API clients, and third-party libraries across various services.

gcloud auth application-default login/google-cloud-sdk/platform/ext-runtime/ruby/CONTRIBUTING.md

@@ -0,0 +1,24 @@
+Want to contribute? Great! First, read this page (including the small print at the end).
+
+### Before you contribute
+Before we can use your code, you must sign the
+[Google Individual Contributor License Agreement](https://developers.google.com/open-source/cla/individual?csw=1)
+(CLA), which you can do online. The CLA is necessary mainly because you own the
+copyright to your changes, even after your contribution becomes part of our
+codebase, so we need your permission to use and distribute your code. We also
+need to be sure of various other things—for instance that you'll tell us if you
+know that your code infringes on other people's patents. You don't have to sign
+the CLA until after you've submitted your code for review and a member has
+approved it, but you must do it before we can put your code into our codebase.
+Before you start working on a larger contribution, you should get in touch with
+us first through the issue tracker with your idea so that we can help out and
+possibly guide you. Coordinating up front makes it much easier to avoid
+frustration later on.
+
+### Code reviews
+All submissions, including submissions by project members, require review. We
+use Github pull requests for this purpose.
+
+### The small print
+Contributions made by corporations are covered by a different agreement than
+the one above, the Software Grant and Corporate Contributor License Agreement.

gcloud auth application-default login/google-cloud-sdk/platform/ext-runtime/ruby/LICENSE

@@ -0,0 +1,202 @@
+
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gcloud auth application-default login/google-cloud-sdk/platform/ext-runtime/ruby/README.md

@@ -0,0 +1,25 @@
+
+Ruby Externalized Runtime
+============================
+
+This is the Ruby runtime definition that is used by gcloud to generate
+Dockerfiles for GAE.
+
+How to Run Tests
+============================
+
+In order to test your runtime changes you will need to run the following
+commands.
+
+```
+$ sudo apt-get install python-pip
+$ sudo pip install virtualenv
+$ cd $CODE_DIRECTORY
+$ git clone $GIT_HOST/ext-runtime-sdk
+$ virtualenv test_env
+$ . test_env/bin/activate
+(test_env)$ pip install ext-runtime-sdk/
+(test_env)$ pip install PyYaml appengine-config-transformer
+(test_env)$ cd gae-xrt-ruby
+(test_env)$ python test/runtime_test.py
+```

gcloud auth application-default login/google-cloud-sdk/platform/ext-runtime/ruby/bin/detect

@@ -0,0 +1,81 @@
+#!/usr/bin/python
+# Copyright 2016 Google 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.
+
+# Ruby detection script.
+
+import glob
+import json
+import os
+import sys
+
+# HACK: Import a vendored gae_ext_runtime library until we have a better
+# solution.
+sys.path.append(os.path.join(
+    os.path.dirname(os.path.dirname(os.path.abspath(sys.argv[0]))), 'lib'))
+
+from gae_ext_runtime import comm
+
+def main(args):
+    if len(args) != 2:
+        print 'Invalid Usage: {} <source-root-directory>'.format(args[0])
+        return 1
+
+    directory = args[1]
+
+    # The directory is considered a Ruby application if any are true:
+    #  * The top-level directory contains a Gemfile
+    #  * The top-level directory contains a config.ru
+    #  * The top-level directory contains a file ending in .rb
+    gemfile = os.path.isfile(os.path.join(directory, 'Gemfile'))
+    configru = os.path.isfile(os.path.join(directory, 'config.ru'))
+    ruby_file = glob.glob(os.path.join(directory, '*.rb'))
+
+    if not gemfile and not configru and not ruby_file:
+        return 1
+
+    try:
+        with open(os.path.join(directory, '.ruby-version')) as f:
+          ruby_version = f.read().strip()
+    except IOError:
+        ruby_version = ''
+
+    config = comm.get_config()
+    appinfo = config.params.appinfo
+
+    if appinfo and appinfo.entrypoint:
+        entrypoint = appinfo.entrypoint
+    else:
+        default = 'bundle exec rackup -p $PORT'
+        prompt = ('This looks like a Ruby application. Please confirm the '
+                  'command to run as the entrypoint:')
+        # Currently query_user does not seem to return the default on empty
+        # response, so do the defaulting ourselves until that is fixed.
+        entrypoint = comm.query_user(prompt, default) or default
+
+    runtime_data = {
+        'ruby_version': ruby_version,
+        'entrypoint': entrypoint,
+    }
+    appinfo =  {
+        'runtime': 'custom' if config.params.custom else 'ruby',
+        'env': 'flex',
+        'entrypoint': entrypoint,
+    }
+    comm.send_runtime_params(runtime_data, appinfo=appinfo)
+
+    return 0
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))

gcloud auth application-default login/google-cloud-sdk/platform/ext-runtime/ruby/bin/generate_configs

@@ -0,0 +1,56 @@
+#!/usr/bin/python
+# Copyright 2016 Google 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.
+
+import json
+import os
+import sys
+
+# HACK: Import a vendored gae_ext_runtime library until we have a better
+# solution.
+sys.path.append(os.path.join(
+    os.path.dirname(os.path.dirname(os.path.abspath(sys.argv[0]))), 'lib'))
+
+from gae_ext_runtime import comm
+
+def main(args):
+    config = comm.get_config()
+    params = config.params
+    if not params.custom and not params.deploy:
+        return 0
+
+    entrypoint = config.runtime_data.entrypoint
+    ruby_version = config.runtime_data.ruby_version
+    base_image_tag = os.environ.get('GAE_RUBY_BASE_IMAGE_TAG') or 'latest'
+
+    # Locate template directory.
+    template_dir = os.path.join(os.path.dirname(__file__), '..', 'templates')
+
+    # Generate Dockerfile
+    path = os.path.join(template_dir, 'Dockerfile.template')
+    with open(path, 'r') as f:
+        data = f.read()
+
+        comm.gen_file('Dockerfile', data.format(ruby_version=ruby_version,
+            entrypoint=entrypoint, base_image_tag=base_image_tag))
+
+    # Generate .dockerignore
+    path = os.path.join(template_dir, 'dockerignore.template')
+    with open(path, 'r') as f:
+        comm.gen_file('.dockerignore', f.read())
+
+    return 0
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))

gcloud auth application-default login/google-cloud-sdk/platform/ext-runtime/ruby/lib/gae_ext_runtime/__init__.py

@@ -0,0 +1,2 @@
+
+

gcloud auth application-default login/google-cloud-sdk/platform/ext-runtime/ruby/lib/gae_ext_runtime/comm.py

@@ -0,0 +1,174 @@
+# Copyright 2015 Google 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.
+
+# Note: this file is part of the sdk-ext-runtime package.  It gets copied into
+# individual GAE runtime modules so that they can be easily deployed.
+
+import json
+import os
+import sys
+
+
+class JSONObject(object):
+    """Wrapper for a JSON object.
+
+    Presents a JSON object as a python object (where fields are attributes)
+    instead of a dictionary.  Undefined attributes produce a value of None
+    instead of an AttributeError.
+
+    Note that attribute names beginning with an underscore are excluded.
+    """
+
+    def __getattr__(self, attr):
+        return None
+
+    def to_dict(self):
+        result = {}
+        for attr, val in self.__dict__.iteritems():
+            if not attr.startswith('_'):
+                result[attr] = _make_serializable(val)
+        return result
+
+    # Alias old style naming so this interoperates with gcloud's appinfo.
+    ToDict = to_dict
+
+
+def _make_serializable(obj):
+    """Converts objects to serializable form."""
+    if isinstance(obj, JSONObject):
+        return obj.to_dict()
+    else:
+        return obj
+
+
+def _write_msg(**message):
+    """Write a message to standard output.
+
+    Args:
+        **message: ({str: object, ...}) A JSON message encoded in keyword
+            arguments.
+    """
+    json.dump(message, sys.stdout, default=_make_serializable)
+    sys.stdout.write('\n')
+    sys.stdout.flush()
+
+
+def error(message, *args):
+    _write_msg(type='error', message=message % args)
+
+
+def warn(message, *args):
+    _write_msg(type='warn', message=message % args)
+
+
+def info(message, *args):
+    _write_msg(type='info', message=message % args)
+
+
+def debug(message, *args):
+    _write_msg(type='debug', message=message % args)
+
+
+def print_status(message, *args):
+    _write_msg(type='print_status', message=message % args)
+
+
+def send_runtime_params(params, appinfo=None):
+    """Send runtime parameters back to the controller.
+
+    Args:
+        params: ({str: object, ...}) Set of runtime parameters.  Must be
+            json-encodable.
+        appinfo: ({str: object, ...} or None) Contents of the app.yaml file to
+            be produced by the runtime definition.  Required fields may be
+            added to this by the framework, the only thing an application
+            needs to provide is the "runtime" field and any additional data
+            fields.
+    """
+    if appinfo is not None:
+        _write_msg(type='runtime_parameters', runtime_data=params,
+                   appinfo=appinfo)
+    else:
+        _write_msg(type='runtime_parameters', runtime_data=params)
+
+
+def get_config():
+    """Request runtime parameters from the controller.
+
+    Returns:
+      (object) The runtime parameters represented as an object.
+    """
+    _write_msg(type='get_config')
+    return dict_to_object(json.loads(sys.stdin.readline()))
+
+
+def dict_to_object(json_dict):
+    """Converts a dictionary to a python object.
+
+    Converts key-values to attribute-values.
+
+    Args:
+      json_dict: ({str: object, ...})
+
+    Returns:
+      (JSONObject)
+    """
+    obj = JSONObject()
+    for name, val in json_dict.iteritems():
+        if isinstance(val, dict):
+          val = dict_to_object(val)
+        setattr(obj, name, val)
+    return obj
+
+
+class RuntimeDefinitionRoot(object):
+    """Abstraction that allows us to access files in the runtime definiton."""
+
+    def __init__(self, path):
+        self.root = path
+
+    def read_file(self, *name):
+        with open(os.path.join(self.root, *name)) as src:
+            return src.read()
+
+
+def gen_file(name, contents):
+    """Generate the file.
+
+    This writes the file to be generated back to the controller.
+
+    Args:
+        name: (str) The UNIX-style relative path of the file.
+        contents: (str) The complete file contents.
+    """
+    _write_msg(type='gen_file', filename=name, contents=contents)
+
+
+def query_user(prompt, default=None):
+    """Query the user for data.
+
+    Args:
+        prompt: (str) Prompt to display to the user.
+        default: (str or None) Default value to use if the user doesn't input
+            anything.
+
+    Returns:
+        (str) Value returned by the user.
+    """
+    kwargs = {}
+    kwargs['prompt'] = prompt
+    if default is not None:
+        kwargs['default'] = default
+    _write_msg(type='query_user', **kwargs)
+    return json.loads(sys.stdin.readline())['result']

gcloud auth application-default login/google-cloud-sdk/platform/ext-runtime/ruby/runtime.yaml

@@ -0,0 +1,8 @@
+author: adamtanner@google.com
+name: ruby
+description: Official Google Ruby runtime definition.
+api_version: 0.2
+detect:
+  python: bin/detect
+generate_configs:
+  python: bin/generate_configs

gcloud auth application-default login/google-cloud-sdk/platform/ext-runtime/ruby/templates/Dockerfile.template

@@ -0,0 +1,54 @@
+# This Dockerfile for a Ruby application was generated by gcloud.
+
+# The base Dockerfile installs:
+# * A number of packages needed by the Ruby runtime and by gems
+#   commonly used in Ruby web apps (such as libsqlite3)
+# * A recent version of NodeJS
+# * A recent version of the standard Ruby runtime to use by default
+# * The bundler gem
+FROM gcr.io/google-appengine/ruby:{base_image_tag}
+
+# If your application requires a specific ruby version (compatible with rbenv),
+# set it here. Leave blank to use the currently recommended default.
+ARG REQUESTED_RUBY_VERSION="{ruby_version}"
+
+# Install any requested ruby if not already preinstalled by the base image.
+# Tries installing a prebuilt package first, then falls back to a source build.
+RUN if test -n "$REQUESTED_RUBY_VERSION" -a \
+        ! -x /rbenv/versions/$REQUESTED_RUBY_VERSION/bin/ruby; then \
+      (apt-get update -y \
+        && apt-get install -y -q gcp-ruby-$REQUESTED_RUBY_VERSION) \
+      || (cd /rbenv/plugins/ruby-build \
+        && git pull \
+        && rbenv install -s $REQUESTED_RUBY_VERSION) \
+      && rbenv global $REQUESTED_RUBY_VERSION \
+      && gem install -q --no-rdoc --no-ri bundler --version $BUNDLER_VERSION \
+      && apt-get clean \
+      && rm -f /var/lib/apt/lists/*_*; \
+    fi
+ENV RBENV_VERSION=${{REQUESTED_RUBY_VERSION:-$RBENV_VERSION}}
+
+# Copy the application files.
+COPY . /app/
+
+# Install required gems if Gemfile.lock is present.
+RUN if test -f Gemfile.lock; then \
+      bundle install --deployment --without="development test" \
+      && rbenv rehash; \
+    fi
+
+# Temporary. Will be moved to base image later.
+ENV RACK_ENV=production \
+    RAILS_ENV=production \
+    RAILS_SERVE_STATIC_FILES=true
+
+# Run asset pipeline if we're in a Rails app.
+RUN if test -d app/assets -a -f config/application.rb; then \
+      bundle exec rake assets:precompile || true; \
+    fi
+
+# BUG: Reset entrypoint to override base image.
+ENTRYPOINT []
+
+# Start application on port $PORT.
+CMD {entrypoint}

gcloud auth application-default login/google-cloud-sdk/platform/ext-runtime/ruby/templates/dockerignore.template

@@ -0,0 +1,5 @@
+.dockerignore
+Dockerfile
+.git
+.hg
+.svn

gcloud auth application-default login/google-cloud-sdk/platform/ext-runtime/ruby/test/runtime_test.py

@@ -0,0 +1,462 @@
+#!/usr/bin/python
+# Copyright 2016 Google 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.
+
+import os
+import unittest
+
+from gae_ext_runtime import testutil
+
+RUNTIME_DEF_ROOT = os.path.dirname(os.path.dirname(__file__))
+
+
+DOCKERFILE_TEXT = '''\
+# This Dockerfile for a Ruby application was generated by gcloud.
+
+# The base Dockerfile installs:
+# * A number of packages needed by the Ruby runtime and by gems
+#   commonly used in Ruby web apps (such as libsqlite3)
+# * A recent version of NodeJS
+# * A recent version of the standard Ruby runtime to use by default
+# * The bundler gem
+FROM gcr.io/google-appengine/ruby:{base_image_tag}
+
+# If your application requires a specific ruby version (compatible with rbenv),
+# set it here. Leave blank to use the currently recommended default.
+ARG REQUESTED_RUBY_VERSION="{ruby_version}"
+
+# Install any requested ruby if not already preinstalled by the base image.
+# Tries installing a prebuilt package first, then falls back to a source build.
+RUN if test -n "$REQUESTED_RUBY_VERSION" -a \\
+        ! -x /rbenv/versions/$REQUESTED_RUBY_VERSION/bin/ruby; then \\
+      (apt-get update -y \\
+        && apt-get install -y -q gcp-ruby-$REQUESTED_RUBY_VERSION) \\
+      || (cd /rbenv/plugins/ruby-build \\
+        && git pull \\
+        && rbenv install -s $REQUESTED_RUBY_VERSION) \\
+      && rbenv global $REQUESTED_RUBY_VERSION \\
+      && gem install -q --no-rdoc --no-ri bundler --version $BUNDLER_VERSION \\
+      && apt-get clean \\
+      && rm -f /var/lib/apt/lists/*_*; \\
+    fi
+ENV RBENV_VERSION=${{REQUESTED_RUBY_VERSION:-$RBENV_VERSION}}
+
+# Copy the application files.
+COPY . /app/
+
+# Install required gems if Gemfile.lock is present.
+RUN if test -f Gemfile.lock; then \\
+      bundle install --deployment --without="development test" \\
+      && rbenv rehash; \\
+    fi
+
+# Temporary. Will be moved to base image later.
+ENV RACK_ENV=production \\
+    RAILS_ENV=production \\
+    RAILS_SERVE_STATIC_FILES=true
+
+# Run asset pipeline if we're in a Rails app.
+RUN if test -d app/assets -a -f config/application.rb; then \\
+      bundle exec rake assets:precompile || true; \\
+    fi
+
+# BUG: Reset entrypoint to override base image.
+ENTRYPOINT []
+
+# Start application on port $PORT.
+CMD {entrypoint}
+'''
+
+
+class RuntimeTestCase(testutil.TestBase):
+    """Tests for the Ruby external runtime fingerprinter."""
+
+    def file_contents(self, filename):
+        """Reads the contents of the file from the tempdir.
+
+        Args:
+            filename: (str) filename to be joined with tempdir prefix.
+
+        Returns:
+            File contents.
+        """
+        with open(self.full_path(filename)) as f:
+            return f.read()
+
+    def stub_response(self, response):
+        """Stubs the console response from the user.
+
+        Args:
+            response: (str) stubbed response.
+
+        Returns:
+            A function to reset the stubbed functions to their original
+            implementations.
+        """
+        can_prompt = self.exec_env.CanPrompt
+        prompt_response = self.exec_env.PromptResponse
+
+        def unstub():
+            self.exec_env.CanPrompt = can_prompt
+            self.exec_env.PromptResponse = prompt_response
+
+        self.exec_env.CanPrompt = lambda: True
+        self.exec_env.PromptResponse = lambda prompt: response
+
+        return unstub
+
+    def setUp(self):
+        self.runtime_def_root = RUNTIME_DEF_ROOT
+        super(RuntimeTestCase, self).setUp()
+
+    def test_generate_without_ruby_files(self):
+        self.write_file('index.html', 'index')
+
+        self.generate_configs()
+
+        self.assertFalse(os.path.exists(self.full_path('app.yaml')))
+        self.assertFalse(os.path.exists(self.full_path('Dockerfile')))
+        self.assertFalse(os.path.exists(self.full_path('.dockerignore')))
+
+    def test_generate_without_ruby_files_no_write(self):
+        """Tests generate_config_data does nothing if no ruby files."""
+        self.write_file('index.html', 'index')
+
+        self.assertIsNone(self.generate_config_data())
+        self.assertFalse(os.path.exists(self.full_path('app.yaml')))
+
+    def test_generate_with_ruby_files(self):
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+        self.write_file('config.ru', 'run Index.app')
+
+        unstub = self.stub_response('bundle exec rackup -p $PORT -E deployment')
+        self.generate_configs()
+        unstub()
+
+        app_yaml = self.file_contents('app.yaml')
+        self.assertIn('runtime: ruby\n', app_yaml)
+        self.assertIn('env: flex\n', app_yaml)
+        self.assertIn('entrypoint: bundle exec rackup -p $PORT -E deployment\n',
+                      app_yaml)
+
+        self.assertFalse(os.path.exists(self.full_path('Dockerfile')))
+        self.assertFalse(os.path.exists(self.full_path('.dockerignore')))
+
+    def test_generate_with_ruby_files_no_write(self):
+        """Tests generate_config_data with basic Ruby files.
+
+        Tests that app.yaml is written with correct contents given entrypoint
+        response, and that Dockerfile and .dockerignore not written to disk.
+        """
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+        self.write_file('config.ru', 'run Index.app')
+
+        unstub = self.stub_response('bundle exec rackup -p $PORT -E deployment')
+        cfg_files = self.generate_config_data()
+        unstub()
+
+        app_yaml = self.file_contents('app.yaml')
+        self.assertIn('runtime: ruby\n', app_yaml)
+        self.assertIn('env: flex\n', app_yaml)
+        self.assertIn('entrypoint: bundle exec rackup -p $PORT -E deployment\n',
+                      app_yaml)
+
+        self.assertNotIn('Dockerfile', [f.filename for f in cfg_files])
+        self.assertNotIn('.dockerignore', [f.filename for f in cfg_files])
+
+    def test_generate_with_deploy(self):
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+        self.write_file('config.ru', 'run Index.app')
+        self.write_file('.ruby-version', 'rbx-3.9')
+
+        unstub = self.stub_response('bundle exec rackup -p $PORT -E deployment')
+        self.generate_configs(deploy=True)
+        unstub()
+
+        dockerfile = self.file_contents('Dockerfile')
+
+        self.assertEqual(
+                dockerfile,
+                DOCKERFILE_TEXT.format(
+                        ruby_version='rbx-3.9',
+                        entrypoint='bundle exec rackup -p $PORT -E deployment'))
+
+        dockerignore = self.file_contents('.dockerignore')
+        self.assertIn('.dockerignore\n', dockerignore)
+        self.assertIn('Dockerfile\n', dockerignore)
+        self.assertIn('.git\n', dockerignore)
+        self.assertIn('.hg\n', dockerignore)
+        self.assertIn('.svn\n', dockerignore)
+
+    def test_generate_with_deploy_no_write(self):
+        """Tests generate_config_data with deploy=True.
+
+        Tests that .dockerignore and Dockerfile contents are correct
+        based on contents of app.
+        """
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+        self.write_file('config.ru', 'run Index.app')
+        self.write_file('.ruby-version', 'rbx-3.9')
+
+        unstub = self.stub_response('bundle exec rackup -p $PORT -E deployment')
+        cfg_files = self.generate_config_data(deploy=True)
+        unstub()
+
+        self.assert_genfile_exists_with_contents(
+                cfg_files,
+                'Dockerfile',
+                DOCKERFILE_TEXT.format(
+                        ruby_version='rbx-3.9',
+                        entrypoint='bundle exec rackup -p $PORT -E deployment'))
+
+        self.assertIn('.dockerignore', [f.filename for f in cfg_files])
+        dockerignore = [f.contents for f in cfg_files if
+                        f.filename == '.dockerignore'][0]
+        self.assertIn('.dockerignore\n', dockerignore)
+        self.assertIn('Dockerfile\n', dockerignore)
+        self.assertIn('.git\n', dockerignore)
+        self.assertIn('.hg\n', dockerignore)
+        self.assertIn('.svn\n', dockerignore)
+
+    def test_generate_with_custom(self):
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+        self.write_file('config.ru', 'run Index.app')
+
+        unstub = self.stub_response('bundle exec rackup -p $PORT -E deployment')
+        self.generate_configs(custom=True)
+        unstub()
+
+        app_yaml = self.file_contents('app.yaml')
+        self.assertIn('runtime: custom\n', app_yaml)
+        self.assertIn('env: flex\n', app_yaml)
+        self.assertIn('entrypoint: bundle exec rackup -p $PORT -E deployment\n',
+                      app_yaml)
+
+        dockerfile = self.file_contents('Dockerfile')
+        self.assertEqual(
+                dockerfile,
+                DOCKERFILE_TEXT.format(
+                        ruby_version='',
+                        entrypoint='bundle exec rackup -p $PORT -E deployment'))
+
+        dockerignore = self.file_contents('.dockerignore')
+        self.assertIn('.dockerignore\n', dockerignore)
+        self.assertIn('Dockerfile\n', dockerignore)
+        self.assertIn('.git\n', dockerignore)
+        self.assertIn('.hg\n', dockerignore)
+        self.assertIn('.svn\n', dockerignore)
+
+    def test_generate_with_custom_no_write(self):
+        """Tests generate_config_data with custom=True.
+
+        Tests that app.yaml is written with correct parameters and
+        Dockerfile, .dockerignore contents are correctly returned by method.
+        """
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+        self.write_file('config.ru', 'run Index.app')
+
+        unstub = self.stub_response('bundle exec rackup -p $PORT -E deployment')
+        cfg_files = self.generate_config_data(custom=True)
+        unstub()
+
+        app_yaml = self.file_contents('app.yaml')
+        self.assertIn('runtime: custom\n', app_yaml)
+        self.assertIn('env: flex\n', app_yaml)
+        self.assertIn('entrypoint: bundle exec rackup -p $PORT -E deployment\n',
+                      app_yaml)
+
+        self.assert_genfile_exists_with_contents(
+                cfg_files,
+                'Dockerfile',
+                DOCKERFILE_TEXT.format(
+                        ruby_version='',
+                        entrypoint='bundle exec rackup -p $PORT -E deployment'))
+
+        self.assertIn('.dockerignore', [f.filename for f in cfg_files])
+        dockerignore = [f.contents for f in cfg_files if
+                        f.filename == '.dockerignore'][0]
+        self.assertIn('.dockerignore\n', dockerignore)
+        self.assertIn('Dockerfile\n', dockerignore)
+        self.assertIn('.git\n', dockerignore)
+        self.assertIn('.hg\n', dockerignore)
+        self.assertIn('.svn\n', dockerignore)
+
+    def test_generate_with_existing_appinfo(self):
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+        self.write_file('config.ru', 'run Index.app')
+        appinfo = testutil.AppInfoFake(
+                entrypoint='bundle exec ruby index.rb $PORT',
+                runtime='ruby',
+                vm=True)
+        self.generate_configs(appinfo=appinfo, deploy=True)
+
+        self.assertFalse(os.path.exists(self.full_path('app.yaml')))
+
+        dockerfile = self.file_contents('Dockerfile')
+        self.assertEqual(
+                dockerfile,
+                DOCKERFILE_TEXT.format(
+                        ruby_version='',
+                        entrypoint='bundle exec ruby index.rb $PORT'))
+
+        dockerignore = self.file_contents('.dockerignore')
+        self.assertIn('.dockerignore\n', dockerignore)
+        self.assertIn('Dockerfile\n', dockerignore)
+        self.assertIn('.git\n', dockerignore)
+        self.assertIn('.hg\n', dockerignore)
+        self.assertIn('.svn\n', dockerignore)
+
+    def test_generate_with_existing_appinfo_no_write(self):
+        """Tests generate_config_data with passed appinfo."""
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+        self.write_file('config.ru', 'run Index.app')
+        appinfo = testutil.AppInfoFake(
+                entrypoint='bundle exec ruby index.rb $PORT',
+                runtime='ruby',
+                vm=True)
+        cfg_files = self.generate_config_data(appinfo=appinfo, deploy=True)
+
+        self.assertFalse(os.path.exists(self.full_path('app.yaml')))
+
+        self.assert_genfile_exists_with_contents(
+                cfg_files,
+                'Dockerfile',
+                DOCKERFILE_TEXT.format(
+                        ruby_version='',
+                        entrypoint='bundle exec ruby index.rb $PORT'))
+
+        self.assertIn('.dockerignore', [f.filename for f in cfg_files])
+        dockerignore = [f.contents for f in cfg_files if
+                        f.filename == '.dockerignore'][0]
+        self.assertIn('.dockerignore\n', dockerignore)
+        self.assertIn('Dockerfile\n', dockerignore)
+        self.assertIn('.git\n', dockerignore)
+        self.assertIn('.hg\n', dockerignore)
+        self.assertIn('.svn\n', dockerignore)
+
+    def test_generate_with_ruby_version(self):
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+        self.write_file('config.ru', 'run Index.app')
+        self.write_file('.ruby-version', '2.3.1\n')
+        appinfo = testutil.AppInfoFake(
+                entrypoint='bundle exec ruby index.rb $PORT',
+                runtime='ruby',
+                vm=True)
+        self.generate_configs(appinfo=appinfo, deploy=True)
+
+        self.assertFalse(os.path.exists(self.full_path('app.yaml')))
+
+        dockerfile = self.file_contents('Dockerfile')
+        self.assertEqual(
+                dockerfile,
+                DOCKERFILE_TEXT.format(
+                        ruby_version='2.3.1',
+                        entrypoint='bundle exec ruby index.rb $PORT'))
+
+        dockerignore = self.file_contents('.dockerignore')
+        self.assertIn('.dockerignore\n', dockerignore)
+        self.assertIn('Dockerfile\n', dockerignore)
+        self.assertIn('.git\n', dockerignore)
+        self.assertIn('.hg\n', dockerignore)
+        self.assertIn('.svn\n', dockerignore)
+
+    def test_generate_with_ruby_version_no_write(self):
+        """Tests generate_config_data with .ruby-version file."""
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+        self.write_file('config.ru', 'run Index.app')
+        self.write_file('.ruby-version', '2.3.1\n')
+        appinfo = testutil.AppInfoFake(
+                entrypoint='bundle exec ruby index.rb $PORT',
+                runtime='ruby',
+                vm=True)
+        cfg_files = self.generate_config_data(appinfo=appinfo, deploy=True)
+
+        self.assertFalse(os.path.exists(self.full_path('app.yaml')))
+
+        self.assert_genfile_exists_with_contents(
+                cfg_files,
+                'Dockerfile',
+                DOCKERFILE_TEXT.format(
+                        ruby_version='2.3.1',
+                        entrypoint='bundle exec ruby index.rb $PORT'))
+
+        self.assertIn('.dockerignore', [f.filename for f in cfg_files])
+        dockerignore = [f.contents for f in cfg_files if
+                        f.filename == '.dockerignore'][0]
+        self.assertIn('.dockerignore\n', dockerignore)
+        self.assertIn('Dockerfile\n', dockerignore)
+        self.assertIn('.git\n', dockerignore)
+        self.assertIn('.hg\n', dockerignore)
+        self.assertIn('.svn\n', dockerignore)
+
+    def test_generate_with_prompt(self):
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+
+        unstub = self.stub_response('bundle exec ruby index.rb $PORT')
+        self.generate_configs(deploy=True)
+        unstub()
+
+        dockerfile = self.file_contents('Dockerfile')
+        self.assertEqual(
+                dockerfile,
+                DOCKERFILE_TEXT.format(
+                        ruby_version='',
+                        entrypoint='bundle exec ruby index.rb $PORT'))
+
+        dockerignore = self.file_contents('.dockerignore')
+        self.assertIn('.dockerignore\n', dockerignore)
+        self.assertIn('Dockerfile\n', dockerignore)
+        self.assertIn('.git\n', dockerignore)
+        self.assertIn('.hg\n', dockerignore)
+        self.assertIn('.svn\n', dockerignore)
+
+    def test_generate_with_prompt_no_write(self):
+        """Tests generate_config_data with entrypoint given by prompt."""
+        self.write_file('index.rb', 'class Index; end')
+        self.write_file('Gemfile', 'source "https://rubygems.org"')
+
+        unstub = self.stub_response('bundle exec ruby index.rb $PORT')
+        cfg_files = self.generate_config_data(deploy=True)
+        unstub()
+
+        self.assert_genfile_exists_with_contents(
+                cfg_files,
+                'Dockerfile',
+                DOCKERFILE_TEXT.format(
+                        ruby_version='',
+                        entrypoint='bundle exec ruby index.rb $PORT'))
+
+        self.assertIn('.dockerignore', [f.filename for f in cfg_files])
+        dockerignore = [f.contents for f in cfg_files if
+                        f.filename == '.dockerignore'][0]
+        self.assertIn('.dockerignore\n', dockerignore)
+        self.assertIn('Dockerfile\n', dockerignore)
+        self.assertIn('.git\n', dockerignore)
+        self.assertIn('.hg\n', dockerignore)
+        self.assertIn('.svn\n', dockerignore)
+
+if __name__ == '__main__':
+      unittest.main()
+