make help target cleanup

Makefile
makefiles/help/include.mk
makefiles/lint/include.mk
makefiles/lint/makefile.mk
makefiles/lint/.........mk
-------------------------
  o Implement topic help:: using 3 distinct targets.
  o help-summary - displays one-line topic help.
  o help-simple  - displays common topic help (lint, build, test)
  o help-verbose - exhaustive topic help for targets.
  o help (default) help-summary + help-simple (see {gerrit,lint}/help.mk)
  o Align all help text on string '[target]' from make cmd usage.
  o Restore JJB_VERSION ?= 2.8.0 in case of variant conflict with v4.1.0 in use.

makefiles/gerrit/help.mk
makefiles/gerrit/include.mk
---------------------------
  o Add gerrit command line convenience targets.
  o replication-status target shows health of gerrit-to-github mirror.

jjb/voltha-scale.yaml
---------------------
  o Lint cleanups, remove duplicate definitions.

Change-Id: I1c40fc0b5a61e3962e3481f0eae7266c5a6f2b2e
diff --git a/makefiles/lint/help.mk b/makefiles/lint/help.mk
new file mode 100644
index 0000000..24a5aa1
--- /dev/null
+++ b/makefiles/lint/help.mk
@@ -0,0 +1,31 @@
+# -*- makefile -*-
+# -----------------------------------------------------------------------
+# Copyright 2021-2023 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.
+# -----------------------------------------------------------------------
+
+help ::
+
+# -----------------------------------------------------------------------
+# -----------------------------------------------------------------------
+help-summary ::
+	@echo '  help-lint           Display lint target help'
+
+help-simple :: help-lint
+help-lint  :
+	@echo
+	@echo "[LINT]"
+	@echo '  help-lint           Display lint target help'
+
+# [EOF]
diff --git a/makefiles/lint/include.mk b/makefiles/lint/include.mk
index aa6867b..66834a6 100644
--- a/makefiles/lint/include.mk
+++ b/makefiles/lint/include.mk
@@ -13,6 +13,7 @@
 include $(ONF_MAKE)/lint/makefile.mk
 include $(ONF_MAKE)/lint/python.mk
 include $(ONF_MAKE)/lint/shell.mk
+include $(ONF_MAKE)/lint/help.mk
 
 ifdef YAML_FILES
   include $(ONF_MAKE)/lint/yaml/python.mk
diff --git a/makefiles/lint/makefile.mk b/makefiles/lint/makefile.mk
index 8ebe9c3..6e1d80a 100644
--- a/makefiles/lint/makefile.mk
+++ b/makefiles/lint/makefile.mk
@@ -1,6 +1,18 @@
 # -*- makefile -*-
 # -----------------------------------------------------------------------
-# Copyright 2022 Open Networking Foundation (ONF) and the ONF Contributors
+# 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.
 # -----------------------------------------------------------------------
 
 ##-------------------##
@@ -32,14 +44,16 @@
 endif
 
 ## -----------------------------------------------------------------------
+## Intent: Perform a lint check on makefile sources
 ## -----------------------------------------------------------------------
 lint-make:
 	$(HIDE)$(env-clean) $(make-check-find) \
 	    | $(xargs-n1-local) $(make-check) $(make-check-args)
 
 ## -----------------------------------------------------------------------
+## Intent: Display command help
 ## -----------------------------------------------------------------------
-help ::
-	@echo '  lint-make                     Syntax check [Mm]akefile and *.mk'
+help-summary ::
+	@echo '  lint-make           Syntax check [Mm]akefile and *.mk'
 
 # [EOF]
diff --git a/makefiles/lint/python.mk b/makefiles/lint/python.mk
index a3d651c..d3fe4fd 100644
--- a/makefiles/lint/python.mk
+++ b/makefiles/lint/python.mk
@@ -1,6 +1,6 @@
 # -*- makefile -*-
 # -----------------------------------------------------------------------
-# Copyright 2022 Open Networking Foundation (ONF) and the ONF Contributors
+# Copyright 2022-2023 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.
@@ -38,14 +38,16 @@
 endif
 
 ## -----------------------------------------------------------------------
+## Intent: Perform a lint check on makefile sources
 ## -----------------------------------------------------------------------
 lint-python:
 	$(HIDE)$(env-clean) $(python-check-find) \
 	    | $(xargs-n1) $(python-check) $(python-check-args)
 
 ## -----------------------------------------------------------------------
+## Intent: Display command help
 ## -----------------------------------------------------------------------
-help ::
-	@echo '  lint-python                   Syntax check python sources'
+help-summary ::
+	@echo '  lint-python         Syntax check python sources (*.py)'
 
 # [EOF]
diff --git a/makefiles/lint/shell.mk b/makefiles/lint/shell.mk
index cadc084..b1a083b 100644
--- a/makefiles/lint/shell.mk
+++ b/makefiles/lint/shell.mk
@@ -1,6 +1,18 @@
 # -*- makefile -*-
 # -----------------------------------------------------------------------
-# Copyright 2022 Open Networking Foundation (ONF) and the ONF Contributors
+# Copyright 2022-2023 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.
 # -----------------------------------------------------------------------
 
 ##-------------------##
@@ -28,6 +40,7 @@
 endif
 
 ## -----------------------------------------------------------------------
+## Intent: Perform a lint check on command line script sources
 ## -----------------------------------------------------------------------
 lint-shell:
 	$(shell-check) -V
@@ -36,8 +49,9 @@
 	    | $(xargs-n1) $(shell-check) $(shell-check-args)
 
 ## -----------------------------------------------------------------------
+## Intent: Display command help
 ## -----------------------------------------------------------------------
-help ::
-	@echo '  lint-shell                    Syntax check shell sources'
+help-summary ::
+	@echo '  lint-shell          Syntax check shell sources'
 
 # [EOF]
diff --git a/makefiles/lint/yaml.mk b/makefiles/lint/yaml.mk
index 00241b3..b60e616 100644
--- a/makefiles/lint/yaml.mk
+++ b/makefiles/lint/yaml.mk
@@ -27,6 +27,6 @@
 	    ; yamllint -s $(YAML_FILES)
 
 help::
-	@echo "  lint-yaml            Syntax check yaml source using yamllint"
+	@echo "  lint-yaml           Syntax check yaml source using yamllint"
 
 # [EOF]
diff --git a/makefiles/lint/yaml/python.mk b/makefiles/lint/yaml/python.mk
index 868d9b7..316afd3 100644
--- a/makefiles/lint/yaml/python.mk
+++ b/makefiles/lint/yaml/python.mk
@@ -1,6 +1,6 @@
 # -*- makefile -*-
 # -----------------------------------------------------------------------
-# Copyright 2022 Open Networking Foundation (ONF) and the ONF Contributors
+# Copyright 2022-2023 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.
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-# SPDX-FileCopyrightText: 2022 Open Networking Foundation (ONF) and the ONF Contributors
+# SPDX-FileCopyrightText: 2022-2023 Open Networking Foundation (ONF) and the ONF Contributors
 # SPDX-License-Identifier: Apache-2.0
 # -----------------------------------------------------------------------
 
@@ -32,10 +32,16 @@
 lint-yaml: $(venv-activate)
 lint-yaml: $(lint-yaml-dep)
 
+## -----------------------------------------------------------------------
+## Intent: Perform a lint check on yaml sources
+## -----------------------------------------------------------------------
 $(lint-yaml-dep):
 	$(vst-env) && yamllint -s $(call lint-yaml-src,$@)
 
-help::
-	@echo "  lint-yaml            Syntax check yaml sources"
+## -----------------------------------------------------------------------
+## Intent: Display command help
+## -----------------------------------------------------------------------
+help-summary ::
+	@echo '  lint-yaml           Syntax check yaml sources (python -M yaml)'
 
 # [EOF]
diff --git a/makefiles/lint/yaml/yamllint.mk b/makefiles/lint/yaml/yamllint.mk
index 6782c74..dc4e015 100644
--- a/makefiles/lint/yaml/yamllint.mk
+++ b/makefiles/lint/yaml/yamllint.mk
@@ -1,6 +1,6 @@
 # -*- makefile -*-
 # -----------------------------------------------------------------------
-# Copyright 2022 Open Networking Foundation (ONF) and the ONF Contributors
+# Copyright 2022-2023 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.
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-# SPDX-FileCopyrightText: 2022 Open Networking Foundation (ONF) and the ONF Contributors
+# SPDX-FileCopyrightText: 2022-2023 Open Networking Foundation (ONF) and the ONF Contributors
 # SPDX-License-Identifier: Apache-2.0
 # -----------------------------------------------------------------------
 
@@ -41,15 +41,18 @@
 yamllint-find += -print0
 
 ## -----------------------------------------------------------------------
+## Intent: Perform a lint check on yaml sources
 ## -----------------------------------------------------------------------
 lint lint-yaml:
 	$(HIDE)$(env-clean) $(yamllint-find) \
-	    | xargs -0 --no-run-if-empty -t -n1 $(yamllint) $(yamllint-args)
+	    | $(xargs-n1-clean) -t $(yamllint) $(yamllint-args)
+#	    | xargs -0 --no-run-if-empty -t -n1 $(yamllint) $(yamllint-args)
 
 ## -----------------------------------------------------------------------
+## Intent: Display command help
 ## -----------------------------------------------------------------------
 help::
-	@echo "  lint-yaml                     Syntax check yaml sources"
+	@echo "  lint-yaml           Syntax check yaml sources (yamllint)"
 
 $(if $(DEBUG),$(warning ENTER))