Ability to use sass/scss compilers as output filter about webassets HOT 4 CLOSED

I have some additional arguments to implement that.

That's how long it takes to build sass files one by one and then merge:
$ time ./manage.py assets rebuild
Building asset: merges/css/common.css

real 0m8.803s
user 0m6.120s
sys 0m2.663s

That's how long it takes to combine sass files into one big SASS file and then convert it to CSS:
Merging:
$ time ./manage.py assets rebuild
Building asset: merges/css/common.css

real 0m0.901s
user 0m0.658s
sys 0m0.238s

Converting to css:
$ time sass media/merges/css/common.css
real 0m0.494s
user 0m0.390s
sys 0m0.094s

I.e. 6x times faster. And it's to hard to style something when page reload takes ≈10 seconds.

from webassets.

This is my approach to it:
https://gist.github.com/1203153

When instantiating filter you may specify two additional params: as_output, which will enable noop in input method and will process the stream in output method and includes_dir, the dir where includes required for sass are living.

Please let me know what do you think.

from webassets.

Before:

$ time ./manage.py assets rebuild
Building asset: merges/css/common.css
Building asset: merges/js/common.js
Building asset: merges/js/beta.js
Building asset: merges/css/beta.css

real 0m12.478s
user 0m8.566s
sys 0m3.811s

After:

$ time ./manage.py assets rebuild
Building asset: merges/css/common.css
Building asset: merges/js/common.js
Building asset: merges/js/beta.js
Building asset: merges/css/beta.css

real 0m1.965s
user 0m1.570s
sys 0m0.393s

from webassets.

Note the commit above, which may also help speed up the sass compiles.

from webassets.