docs: Update cloud upload docs (#168)

docs/source/overview.rst

@@ -158,9 +158,8 @@ All input types are read directly by ``TranscoderNode``. If the input type is
 loop that input file indefinitely.
 
 If the ``-c`` option is given with a Google Cloud Storage URL, then an
-additional node called ``CloudNode`` is added after ``PackagerNode``. It runs a
-thread which watches the output of the packager and pushes updated files to the
-cloud.
+additional node called ``ProxyNode`` is added after ``PackagerNode``. It runs a
+local webserver which takes the output of packager and pushes to cloud storage.
 
 The pipeline and the nodes in it are constructed by ``ControllerNode`` based on
 your config files. If you want to write your own front-end or interface

docs/source/prerequisites.rst

@@ -119,21 +119,29 @@ Cloud Storage (optional)
 ------------------------
 
 Shaka Streamer can push content directly to a Google Cloud Storage or Amazon S3
-bucket. To use this feature, the Google Cloud SDK is required.
-
-See https://cloud.google.com/sdk/install for details on installing the Google
-Cloud SDK on your platform.
+bucket. To use this feature, additional Python modules are required.
 
 
 Google Cloud Storage
 ~~~~~~~~~~~~~~~~~~~~
 
-If you haven’t already, you will need to initialize your gcloud environment and
-log in through your browser.
+First install the Python module if you haven't yet:
+
+.. code:: sh
+
+   python3 -m pip install google-cloud-storage
+
+To use the default authentication, you will need default application
+credentials installed.  On Linux, these live in
+``~/.config/gcloud/application_default_credentials.json``.
+
+The easiest way to install default credentials is through the Google Cloud SDK.
+See https://cloud.google.com/sdk/docs/install-sdk to install the SDK.  Then run:
 
 .. code:: sh
 
    gcloud init
+   gcloud auth application-default login
 
 Follow the instructions given to you by gcloud to initialize the environment
 and login.
@@ -142,9 +150,19 @@ and login.
 Amazon S3
 ~~~~~~~~~
 
+First install the Python module if you haven't yet:
+
+.. code:: sh
+
+   python3 -m pip install boto3
+
 To authenticate to Amazon S3, you can either add credentials to your `boto
 config file`_ or login interactively using the `AWS CLI`_.
 
+.. code:: sh
+
+   aws configure
+
 
 Test Dependencies (optional)
 ----------------------------

shaka-streamer

@@ -68,8 +68,7 @@ def main():
   parser.add_argument('-o', '--output',
                       default='output_files',
                       help='The output folder to write files to, or an HTTP ' +
-                           'or HTTPS URL where files will be PUT.' +
-                           'Used even if uploading to cloud storage.')
+                           'or HTTPS URL where files will be PUT.')
   parser.add_argument('--skip-deps-check',
                       action='store_true',
                       help='Skip checks for dependencies and their versions. ' +