Standardize Spyglass code with YAPF

From recently merged document updates in [0] there is a desire to
standardize the Airship project python codebase.  This is the effort
to do so for the Spyglass project.

[0] https://review.opendev.org/#/c/671291/

Co-Authored-By: Ian Pittwood <pittwoodian@gmail.com>
Change-Id: I2b0f2491d83675d7742b168ecb9e1dfb9a11e719

.style.yapf

@@ -0,0 +1,10 @@
+[style]
+based_on_style = pep8
+spaces_before_comment = 2
+column_limit = 79
+blank_line_before_nested_class_or_def = false
+blank_line_before_module_docstring = true
+split_before_logical_operator = true
+split_before_first_argument = true
+allow_split_before_dict_value = false
+split_before_arithmetic_operator = true

Makefile

@@ -63,7 +63,8 @@ lint: py_lint
 
 # Perform auto formatting
 .PHONY: format
-format: py_format
+format:
+	tox -e fmt
 
 _BASE_IMAGE_ARG := $(if $(BASE_IMAGE),--build-arg FROM="${BASE_IMAGE}" ,)
 
@@ -107,7 +108,3 @@ clean:
 .PHONY: py_lint
 py_lint:
 	tox -e pep8
-
-.PHONY: py_format
-py_format:
-	tox -e fmt

requirements.txt

@@ -9,3 +9,5 @@ netaddr==0.7.19
 pyrsistent==0.15.2
 pyyaml==5.1.1
 six==1.12.0
+yapf==0.27.0
+flake8-import-order==0.18.1

spyglass/parser/engine.py

@@ -28,7 +28,6 @@ LOG = logging.getLogger(__name__)
 
 
 class ProcessDataSource(object):
-
     def __init__(self, site_type):
         # Initialize intermediary and save site type
         self._initialize_intermediary()

spyglass/site_processors/base.py

@@ -14,7 +14,6 @@
 
 
 class BaseProcessor(object):
-
     def __init__(self):
         pass
 

spyglass/site_processors/site_processor.py

@@ -26,7 +26,6 @@ LOG = logging.getLogger(__name__)
 
 
 class SiteProcessor(BaseProcessor):
-
     def __init__(self, site_data, manifest_dir, force_write):
         super().__init__()
         if isinstance(site_data, SiteDocumentData):

tox.ini

@@ -23,7 +23,7 @@ commands =
 [testenv:fmt]
 basepython = python3
 deps =
-    pipenv
+  pipenv
 commands =
   pipenv install --dev
   yapf -ir {toxinidir}/spyglass {toxinidir}/tests
@@ -36,7 +36,7 @@ deps =
 commands =
   pipenv install --dev
   bash -c {toxinidir}/tools/gate/whitespace-linter.sh
-  yapf -dr {toxinidir}/spyglass {toxinidir}/setup.py {toxinidir}/tests
+  yapf -dr {toxinidir}/spyglass {toxinidir}/tests
   flake8 {toxinidir}/spyglass {toxinidir}/tests
   bandit -r spyglass -n 5
 whitelist_externals =
@@ -55,40 +55,51 @@ commands =
 [testenv:bandit]
 basepython = python3
 deps =
-    pipenv
+  pipenv
 commands =
   pipenv install --dev
   bandit -r spyglass -n 5
 
 [testenv:update-requirements]
 deps =
-    pipenv
+  pipenv
 commands =
   pipenv lock --clear
   bash -c "pipenv lock -r > {toxinidir}/requirements.txt"
 whitelist_externals =
   bash
 
-[flake8]
-ignore = W503
-
 [testenv:docs]
 basepython = python3
 deps =
-    -r{toxinidir}/doc/requirements.txt
+  -r{toxinidir}/doc/requirements.txt
 commands =
-    rm -rf doc/build
+  rm -rf doc/build
-    sphinx-build -b html doc/source doc/build/html -n -W -v
+  sphinx-build -b html doc/source doc/build/html -n -W -v
 whitelist_externals = rm
 
 [testenv:cover]
 basepython = python3
 deps =
-    pipenv
+  pipenv
 commands =
   pipenv install --dev
   bash -c 'PATH=$PATH:~/.local/bin; pytest --cov=spyglass \
-      --cov-report html:cover --cov-report xml:cover/coverage.xml \
+       --cov-report html:cover --cov-report xml:cover/coverage.xml \
-      --cov-report term --cov-fail-under 88 tests/'
+       --cov-report term --cov-fail-under 88 tests/'
 whitelist_externals =
   bash
+
+[flake8]
+filename = *.py
+show-source = true
+# [H106] Don't put vim configuration in source files.
+# [H201] No 'except:' at least use 'except Exception:'
+# [H904] Delay string interpolations at logging calls.
+enable-extensions = H106,H201,H904
+# [W503] line break before binary operator
+ignore = W503
+exclude=.venv,.git,.tox,build,dist,*lib/python*,*egg,tools,*.ini,*.po,*.pot
+max-complexity = 24
+application-import-names = spyglass
+import-order-style = pep8