chore: exclude .nox from linting; add pre-commit hook (#64)

* docs(python): update intersphinx for grpc and auth

* docs(python): update intersphinx for grpc and auth

* use https for python intersphinx

Co-authored-by: Tim Swast <swast@google.com>

Source-Author: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>
Source-Date: Wed Nov 18 14:37:25 2020 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 9a7d9fbb7045c34c9d3d22c1ff766eeae51f04c9
Source-Link: googleapis/synthtool@9a7d9fb

* docs(python): fix intersphinx link for google-auth

Source-Author: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>
Source-Date: Thu Nov 19 10:16:05 2020 -0700
Source-Repo: googleapis/synthtool
Source-Sha: a073c873f3928c561bdf87fdfbf1d081d1998984
Source-Link: googleapis/synthtool@a073c87

* chore: add config / docs for 'pre-commit' support

Source-Author: Tres Seaver <tseaver@palladion.com>
Source-Date: Tue Dec 1 16:01:20 2020 -0500
Source-Repo: googleapis/synthtool
Source-Sha: 32af6da519a6b042e3da62008e2a75e991efb6b4
Source-Link: googleapis/synthtool@32af6da

* chore(deps): update precommit hook pre-commit/pre-commit-hooks to v3.3.0

Source-Author: WhiteSource Renovate <bot@renovateapp.com>
Source-Date: Wed Dec 2 17:18:24 2020 +0100
Source-Repo: googleapis/synthtool
Source-Sha: 69629b64b83c6421d616be2b8e11795738ec8a6c
Source-Link: googleapis/synthtool@69629b6

* test(python): give filesystem paths to pytest-cov

https://pytest-cov.readthedocs.io/en/latest/config.html

The pytest-cov docs seem to suggest a filesystem path is expected.

Source-Author: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>
Source-Date: Wed Dec 2 09:28:04 2020 -0700
Source-Repo: googleapis/synthtool
Source-Sha: f94318521f63085b9ccb43d42af89f153fb39f15
Source-Link: googleapis/synthtool@f943185

* chore(deps): update precommit hook pre-commit/pre-commit-hooks to v3.4.0

Co-authored-by: Tres Seaver <tseaver@palladion.com>

Source-Author: WhiteSource Renovate <bot@renovateapp.com>
Source-Date: Wed Dec 16 18:13:24 2020 +0100
Source-Repo: googleapis/synthtool
Source-Sha: aa255b15d52b6d8950cca48cfdf58f7d27a60c8a
Source-Link: googleapis/synthtool@aa255b1

* docs(python): document adding Python 3.9 support, dropping 3.5 support

Closes #787

Source-Author: Tres Seaver <tseaver@palladion.com>
Source-Date: Thu Dec 17 16:08:02 2020 -0500
Source-Repo: googleapis/synthtool
Source-Sha: b670a77a454f415d247907908e8ee7943e06d718
Source-Link: googleapis/synthtool@b670a77

* chore: exclude `.nox` directories from linting

The samples tests create `.nox` directories
with all dependencies installed. These directories
should be excluded from linting.

I've tested this change locally, and it significantly
speeds up linting on my machine.

Source-Author: Tim Swast <swast@google.com>
Source-Date: Tue Dec 22 13:04:04 2020 -0600
Source-Repo: googleapis/synthtool
Source-Sha: 373861061648b5fe5e0ac4f8a38b32d639ee93e4
Source-Link: googleapis/synthtool@3738610

packages/google-cloud-billing-budgets/.flake8

@@ -26,6 +26,7 @@ exclude =
   *_pb2.py
 
   # Standard linting exemptions.
+  **/.nox/**
   __pycache__,
   .git,
   *.pyc,

packages/google-cloud-billing-budgets/.pre-commit-config.yaml

@@ -0,0 +1,17 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v3.4.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: check-yaml
+-   repo: https://github.com/psf/black
+    rev: 19.10b0
+    hooks:
+    - id: black
+-   repo: https://gitlab.com/pycqa/flake8
+    rev: 3.8.4
+    hooks:
+    - id: flake8

packages/google-cloud-billing-budgets/CONTRIBUTING.rst

@@ -21,8 +21,8 @@ In order to add a feature:
 - The feature must be documented in both the API and narrative
   documentation.
 
-- The feature must work fully on the following CPython versions:  2.7,
-  3.5, 3.6, 3.7 and 3.8 on both UNIX and Windows.
+- The feature must work fully on the following CPython versions:
+  3.6, 3.7, 3.8 and 3.9 on both UNIX and Windows.
 
 - The feature must not add unnecessary dependencies (where
   "unnecessary" is of course subjective, but new dependencies should
@@ -111,6 +111,16 @@ Coding Style
   should point to the official ``googleapis`` checkout and the
   the branch should be the main branch on that remote (``master``).
 
+- This repository contains configuration for the
+  `pre-commit <https://pre-commit.com/>`__ tool, which automates checking
+  our linters during a commit.  If you have it installed on your ``$PATH``,
+  you can enable enforcing those checks via:
+
+.. code-block:: bash
+
+   $ pre-commit install
+   pre-commit installed at .git/hooks/pre-commit
+
 Exceptions to PEP8:
 
 - Many unit tests use a helper method, ``_call_fut`` ("FUT" is short for
@@ -192,25 +202,24 @@ Supported Python Versions
 
 We support:
 
--  `Python 3.5`_
 -  `Python 3.6`_
 -  `Python 3.7`_
 -  `Python 3.8`_
+-  `Python 3.9`_
 
-.. _Python 3.5: https://docs.python.org/3.5/
 .. _Python 3.6: https://docs.python.org/3.6/
 .. _Python 3.7: https://docs.python.org/3.7/
 .. _Python 3.8: https://docs.python.org/3.8/
+.. _Python 3.9: https://docs.python.org/3.9/
 
 
 Supported versions can be found in our ``noxfile.py`` `config`_.
 
 .. _config: https://github.com/googleapis/python-billingbudgets/blob/master/noxfile.py
 
-Python 2.7 support is deprecated. All code changes should maintain Python 2.7 compatibility until January 1, 2020.
 
 We also explicitly decided to support Python 3 beginning with version
-3.5. Reasons for this include:
+3.6. Reasons for this include:
 
 -  Encouraging use of newest versions of Python 3
 -  Taking the lead of `prominent`_ open-source `projects`_

packages/google-cloud-billing-budgets/docs/conf.py

@@ -345,10 +345,10 @@
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
-    "python": ("http://python.readthedocs.org/en/latest/", None),
-    "google-auth": ("https://google-auth.readthedocs.io/en/stable", None),
+    "python": ("https://python.readthedocs.org/en/latest/", None),
+    "google-auth": ("https://googleapis.dev/python/google-auth/latest/", None),
     "google.api_core": ("https://googleapis.dev/python/google-api-core/latest/", None,),
-    "grpc": ("https://grpc.io/grpc/python/", None),
+    "grpc": ("https://grpc.github.io/grpc/python/", None),
     "proto-plus": ("https://proto-plus-python.readthedocs.io/en/latest/", None),
 }
 

packages/google-cloud-billing-budgets/noxfile.py

@@ -81,9 +81,8 @@ def default(session):
     session.run(
         "py.test",
         "--quiet",
-        "--cov=google.cloud.billing.budgets",
-        "--cov=google.cloud",
-        "--cov=tests.unit",
+        "--cov=google/cloud",
+        "--cov=tests/unit",
         "--cov-append",
         "--cov-config=.coveragerc",
         "--cov-report=",

packages/google-cloud-billing-budgets/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/python-billingbudgets.git",
-        "sha": "409385ccda7bbdfc5185d19297b057ecde7185c1"
+        "sha": "62cd894af1cc1aeaca48725dcd4665c8ce48df20"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "1f1148d3c7a7a52f0c98077f976bd9b3c948ee2b"
+        "sha": "373861061648b5fe5e0ac4f8a38b32d639ee93e4"
       }
     }
   ],
@@ -87,6 +87,7 @@
     ".kokoro/test-samples.sh",
     ".kokoro/trampoline.sh",
     ".kokoro/trampoline_v2.sh",
+    ".pre-commit-config.yaml",
     ".trampolinerc",
     "CODE_OF_CONDUCT.md",
     "CONTRIBUTING.rst",