[VOL-5031] Build and deploy voltha-onos for v2.12
makefiles/*
-----------
o https://github.com/opencord/onf-make
o Update to the latest library makefiles to support more lint targets.
VERSION
-------
o Cosmetic dev version bump to triage build state.
Change-Id: Iaddd825c24afdfa13e99cfd46cfe887072016d0f
diff --git a/makefiles/lint/json.mk b/makefiles/lint/json.mk
new file mode 100644
index 0000000..1deeaba
--- /dev/null
+++ b/makefiles/lint/json.mk
@@ -0,0 +1,92 @@
+# -*- 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-json lint-json-all lint-json-modified
+
+have-json-files := $(if $(strip $(JSON_FILES)),true)
+JSON_FILES ?= $(error JSON_FILES= required)
+
+## -----------------------------------------------------------------------
+## Intent: Use the json 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-json-all
+## -----------------------------------------------------------------------
+ifndef NO-LINT-JSON
+ lint-json-mode := $(if $(have-json-files),modified,all)
+ lint : lint-json-$(lint-json-mode)
+endif# NO-LINT-JSON
+
+## -----------------------------------------------------------------------
+## Intent: exhaustive json syntax checking
+## -----------------------------------------------------------------------
+json-find-args := $(null)
+json-find-args += -name '$(venv-name)'
+lint-json-all:
+ $(HIDE)$(MAKE) --no-print-directory lint-json-install
+
+ $(activate)\
+ && find . \( $(json-find-args) \) -prune -o -name '*.json' -print0 \
+ | $(xargs-n1) python -m json.tool > /dev/null ;\
+
+## -----------------------------------------------------------------------
+## Intent: check deps for format and python3 cleanliness
+## Note:
+## json --py3k option no longer supported
+## -----------------------------------------------------------------------
+lint-json-modified: $(venv-activate-script)
+ $(HIDE)$(MAKE) --no-print-directory lint-json-install
+
+ $(activate)\
+ && for jsonfile in $(JSON_FILES); do \
+ echo "Validating json file: $$jsonfile" ;\
+ python -m json.tool $$jsonfile > /dev/null ;\
+ done
+
+## -----------------------------------------------------------------------
+## Intent:
+## -----------------------------------------------------------------------
+.PHONY: lint-json-install
+lint-json-install: $(venv-activate-script)
+ @echo
+ @echo "** -----------------------------------------------------------------------"
+ @echo "** json syntax checking"
+ @echo "** -----------------------------------------------------------------------"
+# $(activate) && pip install --upgrade json.tool
+# $(activate) && python -m json.tool --version (?-howto-?)
+ @echo
+
+## -----------------------------------------------------------------------
+## Intent: Display command usage
+## -----------------------------------------------------------------------
+help::
+ @echo ' lint-json Syntax check python using the json command'
+ ifdef VERBOSE
+ @echo ' lint-json-all json checking: exhaustive'
+ @echo ' lint-json-modified json checking: only modified'
+ endif
+
+$(if $(DEBUG),$(warning LEAVE))
+
+# [EOF]