Makefile edits to improve library lint target support.
Makefile
--------
o Replace inlined includes with single $(MAKEDIR)/include.mk
o virtualenv install w/dependencies handled by makefiles/virtualenv.mk
o Use '&&' for command separation to improve error handling.
o Added more target documentation.
o Re-home doc8/rst syntax checking into makefiles/lint/doc8.mk.
howto/code/linting.rst
----------------------
o Document supported lint targets on docs.voltha.org.
howto/release/index.rst
howto/release/post-release/
howto/release/vcs/
---------------------------
o Document more release related activity (bugfix branch creation)
makefiles/consts.mk
-------------------
o Define and use more library macros.
config.mk
---------
o Per-repository library makefile configuration, disable linting.
makefiles/virtualenv.mk
-----------------------
o Library virtualenv install with dependences.
o Begin using a consistent install directory.
o Ugh: repository (voltha-docs) submodules each install a full venv.
o Install dependency drive based on existence of activate script.
o Lint targets updated to use activate script as a dependency.
o Update activate macro to run: set -u && activate && set +u
makefiles/patches/include.mk
----------------------------
o Update to use virtualenv.mk defined macros.
makefiles/lint/doc8.mk
makefiles/lint/python/flake8.mk
makefiles/lint/json.mk
makefiles/lint/python/pylint.mk
makefiles/lint/robot.mk
makefiles/lint/shell.mk
makefiles/lint/yaml.mk
-------------------------------
o All library linting defines consistent targets and logic.
o Support two library targets: lint-all and lint-modified.
o Default to checking all available sources.
o Linting can be disabled per-repository via {project}/config.mk
Change-Id: I7b7b5e523c867183d44244a0da21cfa3584e9a50
diff --git a/makefiles/lint/python/pylint.mk b/makefiles/lint/python/pylint.mk
new file mode 100644
index 0000000..9dc1c7c
--- /dev/null
+++ b/makefiles/lint/python/pylint.mk
@@ -0,0 +1,89 @@
+# -*- makefile -*-
+# -----------------------------------------------------------------------
+# Copyright 2017-2023 Open Networking Foundation (ONF) and the ONF Contributors
+#
+# 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.
+# -----------------------------------------------------------------------
+
+$(if $(DEBUG),$(warning ENTER))
+
+##-------------------##
+##---] GLOBALS [---##
+##-------------------##
+.PHONY: lint-pylint lint-pylint-all lint-pylint-modified
+
+PYTHON_FILES ?= $(error PYTHON_FILES= required)
+
+## -----------------------------------------------------------------------
+## Intent: Use the pylint command to perform syntax checking.
+## o If UNSTABLE=1 syntax check all sources
+## o else only check sources modified by the developer.
+## Usage:
+## % make lint UNSTABLE=1
+## % make lint-pylint-all
+## -----------------------------------------------------------------------
+ifndef NO-LINT-PYLINT
+ lint-pylint-mode := $(if $(have-python-files),modified,all)
+ lint : lint-pylint-$(lint-pylint-mode)
+endif# NO-LINT-PYLINT
+
+## -----------------------------------------------------------------------
+## Intent: exhaustive pylint syntax checking
+## -----------------------------------------------------------------------
+pylint-find-args := $(null)
+pylint-find-args += -name '$(venv-name)'
+pylint-find-args += -o -name 'patches'
+lint-pylint-all: $(venv-activate-script)
+ $(MAKE) --no-print-directory lint-pylint-install
+
+ $(activate)\
+ && find . \( $(pylint-find-args) \) -prune -o -name '*.py' -print0 \
+ | $(xargs-n1) pylint
+
+## -----------------------------------------------------------------------
+## Intent: check deps for format and python3 cleanliness
+## Note:
+## pylint --py3k option no longer supported
+## -----------------------------------------------------------------------
+lint-pylint-modified: $(venv-activate-script)
+ $(MAKE) --no-print-directory lint-pylint-install
+
+ $(activate) && pylint $(PYTHON_FILES)
+
+## -----------------------------------------------------------------------
+## Intent:
+## -----------------------------------------------------------------------
+.PHONY: lint-pylint-install
+lint-pylint-install: $(venv-activate-script)
+ @echo
+ @echo "** -----------------------------------------------------------------------"
+ @echo "** python pylint syntax checking"
+ @echo "** -----------------------------------------------------------------------"
+ $(activate) && pip install --upgrade pylint
+ $(activate) && pylint --version
+ @echo
+
+## -----------------------------------------------------------------------
+## Intent: Display command usage
+## -----------------------------------------------------------------------
+help::
+ @echo ' lint-pylint Syntax check python using the pylint command'
+ ifdef VERBOSE
+ @echo ' $(MAKE) lint-pylint PYTHON_FILES=...'
+ @echo ' lint-pylint-modified pylint checking: only modified'
+ @echo ' lint-pylint-all pylint checking: exhaustive'
+ endif
+
+$(if $(DEBUG),$(warning LEAVE))
+
+# [EOF]