gruntjs - Hard cache busting of assets w/ Compass -

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i have hard cache busting compass, i.e. have hash-suffixed assets.

compass using soft cache busting adding ?v parameter in query string, apparently not supported every cdn service, , avoid , encode file hash directly in filename (myfile-2q7de.png).

is possible ? current approach copy assets, hash them all, write mapping file , use in minimal sass extension real file path it's non-hashed path. works great, except spritesheets : makes compass add hash sprites class names, makes them unusable :

.sprite-myfile-2q7de {     ... }

i should add i'm using grunt this.

compass adds hash cache buster in generated sprite sheets (eg icons-sf6a3361a01.png).

for other images, can use following code in config.rb, found in documentation:

asset_cache_buster |path, real_path|   if file.exists?(real_path)     pathname = pathname.new(path)     modified_time = file.mtime(real_path).strftime("%s")     new_path = "%s/%s-%s%s" % [pathname.dirname, pathname.basename(pathname.extname), modified_time, pathname.extname]      {:path => new_path, :query => nil}   end end

thus, scss code

.icon-cloud {   background: image-url("weather-cloud.png") no-repeat 0 0; }

generates image embedded cache buster (weather-cloud-1365271586.png):

.icon-cloud {   background: url('../img/weather-cloud-1365271586.png') no-repeat 0 0; }

warning: compass doesn't duplicate or rename image. you'll have create rewrite rule allow web server serve image.


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