add build info to Makefile

Author: Arraverz

Makefile

@@ -12,7 +12,7 @@ help:
 
 all: build ## build all
 
-build: clean ## clean, compile, copy files to build folder
+build: clean buildinfojson ## clean, compile, copy files to build folder
 
 				npm install --save node-fetch # install needed node-module
 
@@ -22,6 +22,8 @@ build: clean ## clean, compile, copy files to build folder
 				mkdir -p build/$(PLUGIN_NAME)/updater
 				mkdir -p build/$(PLUGIN_NAME)/l10n
 
+				cp build-info.json build/$(PLUGIN_NAME)/build-info.json # build-info
+
 				mkdir -p src/tmp # build code from coffee
 				cp easydb-library/src/commons.coffee src/tmp
 				cp src/webfrontend/*.coffee src/tmp
@@ -51,3 +53,15 @@ clean: ## clean
 
 zip: build ## build zip file
 			cd build && zip ${ZIP_NAME} -r $(PLUGIN_NAME)/
+
+buildinfojson:
+	repo=`git remote get-url origin | sed -e 's/\.git$$//' -e 's#.*[/\\]##'` ;\
+	rev=`git show --no-patch --format=%H` ;\
+	lastchanged=`git show --no-patch --format=%ad --date=format:%Y-%m-%dT%T%z` ;\
+	builddate=`date +"%Y-%m-%dT%T%z"` ;\
+	echo '{' > build-info.json ;\
+	echo '  "repository": "'$$repo'",' >> build-info.json ;\
+	echo '  "rev": "'$$rev'",' >> build-info.json ;\
+	echo '  "lastchanged": "'$$lastchanged'",' >> build-info.json ;\
+	echo '  "builddate": "'$$builddate'"' >> build-info.json ;\
+	echo '}' >> build-info.json