Add docs session to nox configuration for BigQuery (#7541)

* Add docs session to nox configuration for BigQuery

* Run with `nox -s docs`. This allows us to just build the BigQuery docs
  to preview changes more quickly.

* Moves the magics module documentation to the top level. I found it
  impossible to debug the autosummary errors with generating the docs
  for the magics module, so I move those docs to our more standard
  automodule pattern. With automodule, the error messages were more
  clear (the IPython package was missing in my original implementation).
  Since this module is referenced in documentation and elsewhere, add a
  redirect to the new magics module documentation from the old generated
  location.

* Add license header to conf.py

bigquery/.gitignore

@@ -0,0 +1 @@
+docs/_build

bigquery/docs/README.rst

@@ -0,0 +1 @@
+../README.rst

bigquery/docs/conf.py

@@ -0,0 +1,363 @@
+# -*- coding: utf-8 -*-
+# Copyright 2019 Google LLC
+#
+# 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.
+#
+# google-cloud-bigquery documentation build configuration file
+#
+# This file is execfile()d with the current directory set to its
+# containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+import sys
+import os
+import shutil
+
+from sphinx.util import logging
+
+logger = logging.getLogger(__name__)
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+sys.path.insert(0, os.path.abspath(".."))
+
+__version__ = "0.1.0"
+
+# -- General configuration ------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+# needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    "sphinx.ext.autodoc",
+    "sphinx.ext.autosummary",
+    "sphinx.ext.intersphinx",
+    "sphinx.ext.coverage",
+    "sphinx.ext.napoleon",
+    "sphinx.ext.viewcode",
+]
+
+# autodoc/autosummary flags
+autoclass_content = "both"
+autodoc_default_flags = ["members"]
+autosummary_generate = True
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ["_templates", os.path.join("..", "..", "docs", "_templates")]
+
+# Allow markdown includes (so releases.md can include CHANGLEOG.md)
+# http://www.sphinx-doc.org/en/master/markdown.html
+source_parsers = {".md": "recommonmark.parser.CommonMarkParser"}
+
+# The suffix(es) of source filenames.
+source_suffix = [".rst", ".md"]
+
+# The encoding of source files.
+# source_encoding = 'utf-8-sig'
+
+# The master toctree document.
+master_doc = "index"
+
+# General information about the project.
+project = u"google-cloud-bigquery"
+copyright = u"2015, Google"
+author = u"Google APIs"
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The full version, including alpha/beta/rc tags.
+release = __version__
+# The short X.Y version.
+version = ".".join(release.split(".")[0:2])
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#
+# This is also used if you do content translation via gettext catalogs.
+# Usually you set "language" from the command line for these cases.
+language = None
+
+# There are two options for replacing |today|: either, you set today to some
+# non-false value, then it is used:
+# today = ''
+# Else, today_fmt is used as the format for a strftime call.
+# today_fmt = '%B %d, %Y'
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+exclude_patterns = ["_build"]
+
+# The reST default role (used for this markup: `text`) to use for all
+# documents.
+# default_role = None
+
+# If true, '()' will be appended to :func: etc. cross-reference text.
+# add_function_parentheses = True
+
+# If true, the current module name will be prepended to all description
+# unit titles (such as .. function::).
+# add_module_names = True
+
+# If true, sectionauthor and moduleauthor directives will be shown in the
+# output. They are ignored by default.
+# show_authors = False
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = "sphinx"
+
+# A list of ignored prefixes for module index sorting.
+# modindex_common_prefix = []
+
+# If true, keep warnings as "system message" paragraphs in the built documents.
+# keep_warnings = False
+
+# If true, `todo` and `todoList` produce output, else they produce nothing.
+todo_include_todos = True
+
+# -- Options for HTML output ----------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+html_theme = "sphinx_rtd_theme"
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+# html_theme_options = {}
+
+# Add any paths that contain custom themes here, relative to this directory.
+# html_theme_path = []
+
+# The name for this set of Sphinx documents.  If None, it defaults to
+# "<project> v<release> documentation".
+# html_title = None
+
+# A shorter title for the navigation bar.  Default is the same as html_title.
+# html_short_title = None
+
+# The name of an image file (relative to this directory) to place at the top
+# of the sidebar.
+# html_logo = None
+
+# The name of an image file (within the static path) to use as favicon of the
+# docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
+# pixels large.
+# html_favicon = None
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+# html_static_path = []
+
+# Add any extra paths that contain custom files (such as robots.txt or
+# .htaccess) here, relative to this directory. These files are copied
+# directly to the root of the documentation.
+# html_extra_path = []
+
+# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
+# using the given strftime format.
+# html_last_updated_fmt = '%b %d, %Y'
+
+# If true, SmartyPants will be used to convert quotes and dashes to
+# typographically correct entities.
+# html_use_smartypants = True
+
+# Custom sidebar templates, maps document names to template names.
+# html_sidebars = {}
+
+# Additional templates that should be rendered to pages, maps page names to
+# template names.
+# html_additional_pages = {}
+
+# If false, no module index is generated.
+# html_domain_indices = True
+
+# If false, no index is generated.
+# html_use_index = True
+
+# If true, the index is split into individual pages for each letter.
+# html_split_index = False
+
+# If true, links to the reST sources are added to the pages.
+# html_show_sourcelink = True
+
+# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
+# html_show_sphinx = True
+
+# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
+# html_show_copyright = True
+
+# If true, an OpenSearch description file will be output, and all pages will
+# contain a <link> tag referring to it.  The value of this option must be the
+# base URL from which the finished HTML is served.
+# html_use_opensearch = ''
+
+# This is the file name suffix for HTML files (e.g. ".xhtml").
+# html_file_suffix = None
+
+# Language to be used for generating the HTML full-text search index.
+# Sphinx supports the following languages:
+#   'da', 'de', 'en', 'es', 'fi', 'fr', 'hu', 'it', 'ja'
+#   'nl', 'no', 'pt', 'ro', 'ru', 'sv', 'tr'
+# html_search_language = 'en'
+
+# A dictionary with options for the search language support, empty by default.
+# Now only 'ja' uses this config value
+# html_search_options = {'type': 'default'}
+
+# The name of a javascript file (relative to the configuration directory) that
+# implements a search results scorer. If empty, the default will be used.
+# html_search_scorer = 'scorer.js'
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = "google-cloud-bigquery-doc"
+
+# -- Options for LaTeX output ---------------------------------------------
+
+latex_elements = {
+    # The paper size ('letterpaper' or 'a4paper').
+    #'papersize': 'letterpaper',
+    # The font size ('10pt', '11pt' or '12pt').
+    #'pointsize': '10pt',
+    # Additional stuff for the LaTeX preamble.
+    #'preamble': '',
+    # Latex figure (float) alignment
+    #'figure_align': 'htbp',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+#  author, documentclass [howto, manual, or own class]).
+latex_documents = [
+    (
+        master_doc,
+        "google-cloud-bigquery.tex",
+        u"google-cloud-bigquery Documentation",
+        author,
+        "manual",
+    )
+]
+
+# The name of an image file (relative to this directory) to place at the top of
+# the title page.
+# latex_logo = None
+
+# For "manual" documents, if this is true, then toplevel headings are parts,
+# not chapters.
+# latex_use_parts = False
+
+# If true, show page references after internal links.
+# latex_show_pagerefs = False
+
+# If true, show URL addresses after external links.
+# latex_show_urls = False
+
+# Documents to append as an appendix to all manuals.
+# latex_appendices = []
+
+# If false, no module index is generated.
+# latex_domain_indices = True
+
+# -- Options for manual page output ---------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    (
+        master_doc,
+        "google-cloud-bigquery",
+        u"google-cloud-bigquery Documentation",
+        [author],
+        1,
+    )
+]
+
+# If true, show URL addresses after external links.
+# man_show_urls = False
+
+# -- Options for Texinfo output -------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+    (
+        master_doc,
+        "google-cloud-bigquery",
+        u"google-cloud-bigquery Documentation",
+        author,
+        "google-cloud-bigquery",
+        "APIs",
+    )
+]
+
+# Documents to append as an appendix to all manuals.
+# texinfo_appendices = []
+
+# If false, no module index is generated.
+# texinfo_domain_indices = True
+
+# How to display URL addresses: 'footnote', 'no', or 'inline'.
+# texinfo_show_urls = 'footnote'
+
+# If true, do not generate a @detailmenu in the "Top" node's menu.
+# texinfo_no_detailmenu = False
+
+# Example configuration for intersphinx: refer to the Python standard library.
+intersphinx_mapping = {
+    "python": ("http://python.readthedocs.org/en/latest/", None),
+    "gax": ("https://gax-python.readthedocs.org/en/latest/", None),
+    "pandas": ("https://pandas.pydata.org/pandas-docs/stable/", None),
+}
+
+# Napoleon settings
+napoleon_google_docstring = True
+napoleon_numpy_docstring = True
+napoleon_include_private_with_doc = False
+napoleon_include_special_with_doc = True
+napoleon_use_admonition_for_examples = False
+napoleon_use_admonition_for_notes = False
+napoleon_use_admonition_for_references = False
+napoleon_use_ivar = False
+napoleon_use_param = True
+napoleon_use_rtype = True
+
+# Static HTML pages, e.g. to support redirects
+# See: https://tech.signavio.com/2017/managing-sphinx-redirects
+# HTML pages to be copied from source to target
+static_html_pages = ["usage.html", "generated/google.cloud.bigquery.magics.html"]
+
+
+def copy_static_html_pages(app, exception):
+    if exception is None and app.builder.name == "html":
+        for static_html_page in static_html_pages:
+            target_path = app.outdir + "/" + static_html_page
+            src_path = app.srcdir + "/" + static_html_page
+            if os.path.isfile(src_path):
+                logger.info("Copying static html: %s -> %s", src_path, target_path)
+                shutil.copyfile(src_path, target_path)
+
+
+def setup(app):
+    app.connect("build-finished", copy_static_html_pages)

bigquery/docs/generated/google.cloud.bigquery.magics.html

@@ -0,0 +1,8 @@
+<html>
+<head>
+ <meta http-equiv="refresh" content="1; url=../magics.html:" />
+ <script>
+   window.location.href = "../magics.html"
+ </script>
+</head>
+</html>

bigquery/docs/index.rst

@@ -1,4 +1,4 @@
-.. include:: /../bigquery/README.rst
+.. include:: README.rst
 
 More Examples
 ~~~~~~~~~~~~~
@@ -27,4 +27,3 @@ For a list of all ``google-cloud-bigquery`` releases:
   :maxdepth: 2
 
   changelog
-

bigquery/docs/magics.rst

@@ -0,0 +1,5 @@
+IPython Magics for BigQuery
+===========================
+
+.. automodule:: google.cloud.bigquery.magics
+    :members: