Automates bumping js file versions. Experimental, please revert Makefile

if it causes problems.

.gitignore

@@ -2,3 +2,4 @@ node_modules
 *.swp
 .idea/
 *.iml
+.*.tmp

Makefile

@@ -21,4 +21,4 @@ clean:
 	@rm -f $(OUTPUT_DIR)/*.bundle.js
 
 deploy:
-	@mkdir -p $(DEPLOY_DIR) && cp $(OUTPUT_DIR)/*.bundle.js $(DEPLOY_DIR)
+	@mkdir -p $(DEPLOY_DIR) && cp $(OUTPUT_DIR)/*.bundle.js $(DEPLOY_DIR) && ./bump-js-versions.sh

bump-js-versions.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+# This script finds all js files included from index.html which have been
+# modified and bumps their version (the value of the "v" parameter used
+# in index.html)
+
+# contents of index.html at HEAD (excluding not-committed changes)
+index=`git show HEAD:index.html`
+
+# js files included from index.html. The sort needed for comm
+jsfiles=.bump-js-versions-jsfiles.tmp
+echo "$index" | grep '<script src=".*"' -o | sed -e 's/<script src="//' | sed -e 's/\?.*//' |  tr -d \" | sort > $jsfiles
+
+# modified files since the last commit
+gitmodified=.bump-js-versions-gitmodified.tmp
+git ls-files -m | sort > $gitmodified
+
+for file in `comm -12 $jsfiles $gitmodified` ;do
+    old_version=`echo "$index" | grep "<script src=\"${file}?v=[0-9]*" -o | sed -e 's/.*v=//'| tr -d \"`
+    new_version=$((1+$old_version))
+    echo Bumping version of $file from $old_version to $new_version
+    sed -i.tmp -e "s%script src=\"${file}\?v=.*\"%script src=\"$file?v=$new_version\"%" index.html
+done
+
+rm -f $jsfiles $gitmodified index.html.tmp