Generate readmes for most service samples [(googleapis#599)](GoogleCl…

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samples/snippets/README.rst

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+.. This file is automatically generated. Do not edit this file directly.
+
+Google Cloud Pub/Sub Python Samples
+===============================================================================
+
+This directory contains samples for Google Cloud Pub/Sub. `Google Cloud Pub/Sub`_ is a fully-managed real-time messaging service that allows you to send and receive messages between independent applications.
+
+
+
+
+.. _Google Cloud Pub/Sub: https://cloud.google.com/pubsub/docs 
+
+Setup
+-------------------------------------------------------------------------------
+
+
+Authentication
+++++++++++++++
+
+Authentication is typically done through `Application Default Credentials`_,
+which means you do not have to change the code to authenticate as long as
+your environment has credentials. You have a few options for setting up
+authentication:
+
+#. When running locally, use the `Google Cloud SDK`_
+
+    .. code-block:: bash
+
+        gcloud beta auth application-default login
+
+
+#. When running on App Engine or Compute Engine, credentials are already
+   set-up. However, you may need to configure your Compute Engine instance
+   with `additional scopes`_.
+
+#. You can create a `Service Account key file`_. This file can be used to
+   authenticate to Google Cloud Platform services from any environment. To use
+   the file, set the ``GOOGLE_APPLICATION_CREDENTIALS`` environment variable to
+   the path to the key file, for example:
+
+    .. code-block:: bash
+
+        export GOOGLE_APPLICATION_CREDENTIALS=/path/to/service_account.json
+
+.. _Application Default Credentials: https://cloud.google.com/docs/authentication#getting_credentials_for_server-centric_flow
+.. _additional scopes: https://cloud.google.com/compute/docs/authentication#using
+.. _Service Account key file: https://developers.google.com/identity/protocols/OAuth2ServiceAccount#creatinganaccount
+
+Install Dependencies
+++++++++++++++++++++
+
+#. Install `pip`_ and `virtualenv`_ if you do not already have them.
+
+#. Create a virtualenv. Samples are compatible with Python 2.7 and 3.4+.
+
+    .. code-block:: bash
+
+        $ virtualenv env
+        $ source env/bin/activate
+
+#. Install the dependencies needed to run the samples.
+
+    .. code-block:: bash
+
+        $ pip install -r requirements.txt
+
+.. _pip: https://pip.pypa.io/
+.. _virtualenv: https://virtualenv.pypa.io/
+
+Samples
+-------------------------------------------------------------------------------
+
+Quickstart
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+
+
+To run this sample:
+
+.. code-block:: bash
+
+    $ python quickstart.py
+
+
+Publisher
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+
+
+To run this sample:
+
+.. code-block:: bash
+
+    $ python publisher.py
+
+    usage: publisher.py [-h] {list,create,delete,publish} ...
+    
+    This application demonstrates how to perform basic operations on topics
+    with the Cloud Pub/Sub API.
+    
+    For more information, see the README.md under /pubsub and the documentation
+    at https://cloud.google.com/pubsub/docs.
+    
+    positional arguments:
+      {list,create,delete,publish}
+        list                Lists all Pub/Sub topics in the current project.
+        create              Create a new Pub/Sub topic.
+        delete              Deletes an existing Pub/Sub topic.
+        publish             Publishes a message to a Pub/Sub topic with the given
+                            data.
+    
+    optional arguments:
+      -h, --help            show this help message and exit
+
+
+Subscribers
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+
+
+To run this sample:
+
+.. code-block:: bash
+
+    $ python subscriber.py
+
+    usage: subscriber.py [-h] {list,create,delete,receive} ...
+    
+    This application demonstrates how to perform basic operations on
+    subscriptions with the Cloud Pub/Sub API.
+    
+    For more information, see the README.md under /pubsub and the documentation
+    at https://cloud.google.com/pubsub/docs.
+    
+    positional arguments:
+      {list,create,delete,receive}
+        list                Lists all subscriptions for a given topic.
+        create              Create a new pull subscription on the given topic.
+        delete              Deletes an existing Pub/Sub topic.
+        receive             Receives a message from a pull subscription.
+    
+    optional arguments:
+      -h, --help            show this help message and exit
+
+
+Identity and Access Management
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+
+
+To run this sample:
+
+.. code-block:: bash
+
+    $ python iam.py
+
+    usage: iam.py [-h]
+                  {get-topic-policy,get-subscription-policy,set-topic-policy,set-subscription-policy,check-topic-permissions,check-subscription-permissions}
+                  ...
+    
+    This application demonstrates how to perform basic operations on IAM
+    policies with the Cloud Pub/Sub API.
+    
+    For more information, see the README.md under /pubsub and the documentation
+    at https://cloud.google.com/pubsub/docs.
+    
+    positional arguments:
+      {get-topic-policy,get-subscription-policy,set-topic-policy,set-subscription-policy,check-topic-permissions,check-subscription-permissions}
+        get-topic-policy    Prints the IAM policy for the given topic.
+        get-subscription-policy
+                            Prints the IAM policy for the given subscription.
+        set-topic-policy    Sets the IAM policy for a topic.
+        set-subscription-policy
+                            Sets the IAM policy for a topic.
+        check-topic-permissions
+                            Checks to which permissions are available on the given
+                            topic.
+        check-subscription-permissions
+                            Checks to which permissions are available on the given
+                            subscription.
+    
+    optional arguments:
+      -h, --help            show this help message and exit
+
+
+
+
+The client library
+-------------------------------------------------------------------------------
+
+This sample uses the `Google Cloud Client Library for Python`_.
+You can read the documentation for more details on API usage and use GitHub
+to `browse the source`_ and  `report issues`_.
+
+.. Google Cloud Client Library for Python:
+    https://googlecloudplatform.github.io/google-cloud-python/
+.. browse the source:
+    https://github.com/GoogleCloudPlatform/google-cloud-python
+.. report issues:
+    https://github.com/GoogleCloudPlatform/google-cloud-python/issues
+
+
+.. _Google Cloud SDK: https://cloud.google.com/sdk/

samples/snippets/README.rst.in

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+# This file is used to generate README.rst
+
+product:
+  name: Google Cloud Pub/Sub
+  short_name: Cloud Pub/Sub
+  url: https://cloud.google.com/pubsub/docs
+  description: > 
+    `Google Cloud Pub/Sub`_ is a fully-managed real-time messaging service that
+    allows you to send and receive messages between independent applications.
+
+setup:
+- auth
+- install_deps
+
+samples:
+- name: Quickstart
+  file: quickstart.py
+- name: Publisher
+  file: publisher.py
+  show_help: true
+- name: Subscribers
+  file: subscriber.py
+  show_help: true
+- name: Identity and Access Management
+  file: iam.py
+  show_help: true
+
+cloud_client_library: true