Compass sprites: applying individual styles to every sprite class without writing out each sprite name manually - sass

Question

I'm magic-importing my sprites:
// Creating a concatenated sprite image out of all sprites in the "/images/sprites/" folder
$sprites-layout: vertical
#import sprites/*.png
$sprites-sprite-dimensions: true // Image width and height will be applied to all sprite classes
+all-sprites-sprites // Generate all sprite classes
I would like to add custom styles to every sprite. I managed to add styles common to all sprites by declaring a class before magic-importing (magic import seems to extend this class for every sprite):
.sprites-sprite // This code will be applied to all sprite classes
#extend %inline-block
But I would also like to apply styles individual to each sprite. E. g. I would like to use min-width instead of width.
As a temprorary solution, I list all my sprite names manually:
=sprite-custom-styles($item)
+sprites-sprite($item)
padding-left: px(sprites-sprite-width($item) * 1.3)
min-width: sprites-sprite-width($item)
#each $item in foo, bar, baz, quux
.sprites-#{$item}
+sprite-custom-styles($item)
This is very burdensome, I would like to do this automatically.
Maybe magic importing creates a list of names that I can use? Or maybe I could define a mixin with a certain name that magic importing would call on every sprite class?

Answer 1

You can retrieve the list of names with the function sprite-names($map), like that:
#each $item in sprite-names($sprites-sprites)
...
Compass creates the sprite map $<map>-sprites after importing images (#import "<map>/*.png").