Recently I switched my building process from Grunt to pure command line tools/commands, taking advantage of the less known
I was actually motivated by this post by Keith Cirkel, followed by a second, incredibly useful post exposing some common tasks made entirely from command line commands.
However, K. Cirkel didn't examine a pretty common case for CSS processing: multiple files pipelines. Infact, if you read his second post you see he nicely shows how to prefix and minify a single CSS file with
cssmin, but he doesn't say anything about a (probably more common) building chain with more than one CSS file to process.
Maybe if you work on Linux, you never thought it would be a problem... Well, on Windows it's a bit trickier, but actually not so much.
Here's the magic snippet:
FOR /F "usebackq" %f IN (`dir src\css /b /A:-D`) DO autoprefixer src/css/%f -o - | cssmin > build/css/%f
So, we are exploiting the Batch
FOR command to iterate over the files in
src/css, and then feed them to
"usebackq" are needed to make
FOR execute the command after
IN before evaluating the expression as an iterable collection.
/A:-D passed to
dir make the command print only the filenames, without sub-directories.
And that's all folks! You can check other handy scripts here and here.