bust static cache on git checkout: insert git revision id (HEAD) into a link

bust-static-cache-on-git-checkout.md

• add filter

$ git config filter.nocache.smudge "perl -pe 'BEGIN {\$h = \`git log --pretty=format:\"%H\" -1\`; } s{\\?[A-z0-9]*#cache-bust}{?\$h#cache-bust}g'"
$ git config filter.nocache.clean "perl -pe 's{\\?[A-z0-9]*#cache-bust}{?nocache#cache-bust}g'"

• edit .gitattributes

*.html filter=nocache

and this <link media="all" href="/css/main.css?nocache#cache-bust" type="text/css" rel="stylesheet">

on checkout will be transformed into something like this <link media="all" href="/css/main.css?a761f5f48b8d7389069982d82a6c945fddd687a9#cache-bust" type="text/css" rel="stylesheet">