Automate README.md modules generation

Makefile

@@ -202,12 +202,34 @@ test-integration:
 .PHONY: gen-readme
 gen-readme: check-version-is-set
 gen-readme: check-stage-is-set
-gen-readme:
+gen-readme: _gen-readme-docs
+gen-readme: _gen-readme-main
+
+.PHONY: _gen-readme-docs
+_gen-readme-docs:
 	@echo "################################################################################"
-	@echo "# Generate README.md for PHP $(VERSION) ($(IMAGE):$(DOCKER_TAG)) on $(ARCH)"
+	@echo "# Generate doc/php-modules.md for PHP $(VERSION) ($(IMAGE):$(DOCKER_TAG)) on $(ARCH)"
 	@echo "################################################################################"
 	./bin/gen-readme.sh $(IMAGE) $(ARCH) $(STAGE) $(VERSION) || bash -x ./bin/gen-readme.sh $(IMAGE) $(ARCH) $(STAGE) $(VERSION)
 	git diff --quiet || { echo "Build Changes"; git diff; git status; false; }
+	@echo
+
+.PHONY: _gen-readme-main
+_gen-readme-main:
+	@echo "################################################################################"
+	@echo "# Generate README.md"
+	@echo "################################################################################"
+	MODULES="$$( cat doc/php-modules.md \
+		| grep href \
+		| sed -e 's|</a.*||g' -e 's|.*">||g' \
+		| sort -fu \
+		| xargs -n1 sh -c 'echo "[\`$$1\`](php_modules/$$(echo "$${1}" | tr "[:upper:]" "[:lower:]")/)"' -- )"; \
+	cat "README.md" \
+		| perl -0 -pe "s#<!-- modules -->.*<!-- /modules -->#<!-- modules -->\n$${MODULES}\n<!-- /modules -->#s" \
+		> "README.md.tmp"
+	yes | mv -f "README.md.tmp" "README.md"
+	git diff --quiet || { echo "Build Changes"; git diff; git status; false; }
+	@echo
 
 ###
 ### Generate Modules

README.md

@@ -84,11 +84,8 @@ The provided Docker images heavily rely on inheritance to guarantee smallest pos
 <h2><img id="php-extensions" width="20" src="https://github.com/devilbox/artwork/raw/master/submissions_logo/cytopia/01/png/logo_64_trans.png"> Available PHP extensions</h2>
 
 > Click below listed extensions for details:
-<!--
-Generate via:
-cat doc/php_modules.md | grep href | sed 's|</a.*||g' | sed 's|.*">||g' | xargs -n1 sh -c 'echo "[\`$1\`](php_modules/$(echo "${1}" | tr "[:upper:]" "[:lower:]")/)"' -- | xclip
--->
 
+<!-- modules -->
 [`amqp`](php_modules/amqp/)
 [`apc`](php_modules/apc/)
 [`apcu`](php_modules/apcu/)
@@ -180,8 +177,8 @@ cat doc/php_modules.md | grep href | sed 's|</a.*||g' | sed 's|.*">||g' | xargs
 [`tokenizer`](php_modules/tokenizer/)
 [`uploadprogress`](php_modules/uploadprogress/)
 [`uuid`](php_modules/uuid/)
-[`wddx`](php_modules/wddx/)
 [`vips`](php_modules/vips/)
+[`wddx`](php_modules/wddx/)
 [`Xdebug`](php_modules/xdebug/)
 [`xlswriter`](php_modules/xlswriter/)
 [`xml`](php_modules/xml/)
@@ -192,6 +189,7 @@ cat doc/php_modules.md | grep href | sed 's|</a.*||g' | sed 's|.*">||g' | xargs
 [`yaml`](php_modules/yaml/)
 [`zip`](php_modules/zip/)
 [`zlib`](php_modules/zlib/)
+<!-- /modules -->
 
 :information_source: For details see **[Documentation: PHP Modules](doc/php-modules.md)**<br/>
 :information_source: For details see **[Contributor Documentation: PHP Modules](php_modules/README.md)**