Fix sass cacheing?

[robwierzbowski]

I'm taking a guess that sass cacheing isn't working in this plugin currently, because each file is written to the temp directory before processing which gives it a newer file-changed date than the cached file.

Can't think of a fix for this off the top of my head — using gulp-changed would work for files that no other files depend on, but without knowing the dependency tree I'm not sure how to handle a file containing a mixin that unchanged files depend on (like _obj.scss in the test files). Sass probably has this figured out, and it might just work with a combo of -changed, -intermediate, adding the source files to load paths, and a Sass cache in the local root folder.

Some docs on sass-caching: https://twitter.com/nex3/status/475324934491602945

[sindresorhus]

Could preserve the mtime on the temp'd files.

[robwierzbowski]

That might be easier :).

[robwierzbowski]

I got caching working with the intermediate plugin, but only when specifying a constant OS tempDir (makes sense). I could add a third argument or option to the intermediate function to specify a specific tempDir relative to the OS temp directory if you decide you'd like to switch over.

[sindresorhus]

@robwierzbowski nah, i think constant temp dir is alright.

[robwierzbowski]

I'll need the specific tempDir arg to make a constant tempdir, but I gotcha. PRs to this and the other issue on the way, maybe this weekend.