Bug 1044796 Provide an option to Loop's standalone client makefile to create a version.txt file. r=nperriault

browser/components/loop/.gitignore

@@ -1,2 +1 @@
 .module-cache
-standalone/content/config.js

browser/components/loop/standalone/.gitignore

@@ -1,2 +1,5 @@
+.module-cache
 node_modules
 *.pyc
+content/config.js
+content/VERSION.txt

browser/components/loop/standalone/Makefile

@@ -21,6 +21,21 @@ runserver: config
 frontend:
 	@echo "Not implemented yet."
 
+# Try hg first, if not fall back to git.
+SOURCE_STAMP := $(shell hg parent --template '{node|short}\n' 2> /dev/null)
+ifndef SOURCE_STAMP
+SOURCE_STAMP := $(shell git describe --always --tag)
+endif
+
+SOURCE_DATE := $(shell hg parent --template '{date|date}\n' 2> /dev/null)
+ifndef SOURCE_DATE
+SOURCE_DATE := $(shell git log -1 --format="%H%n%aD")
+endif
+
+version:
+	@echo $(SOURCE_STAMP) > content/VERSION.txt
+	@echo $(SOURCE_DATE) >> content/VERSION.txt
+
 config:
 	@echo "var loop = loop || {};" > content/config.js
 	@echo "loop.config = loop.config || {};" >> content/config.js