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I did not see the minifier among the tools in https://code.trac.wordpress.org/browser/ . Is it in the repo somewhere? Or, what is it?

(Note this question has been asked previously on Stack Exchange but the author was really asking a different question, so it does not have an answer. See What exact CSS minifier does WP core use? if you're really interested.)

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According the the Gruntfile.js in core, the minifier is grunt-contrib-cssmin - https://www.npmjs.com/package/grunt-contrib-cssmin

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Yeah, this minifier is present only in the development version of WordPress and it is not shipped with code that you can find in releases. They usually ship un-minified CSS and JS, with suffix .min for minified files. Also, based on a config option you can select which one to load between the two.

By development version of WordPress I mean the code resides in the SVN trunk (can be found here). They also maintain a GIT mirror of the SVN repo, just for people who prefer using it.

One can play with their latest trunk by cloning the git repo locally:

git clone git://develop.git.wordpress.org/ wordpress-trunk
cd wordpress-trunk
# explore
#
# Gruntfile.js is the place where can one look at the 
# logic the core uses to build assets with
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  • Just to clarify, when you say 'development version of WordPress' are you referring to the nightly builds? And when you say 'other code' are you referring to the releases?
    – davemac
    Commented Aug 24, 2017 at 1:26
  • @davemac thanks, I have clarified that in the answer.
    – Andrei Glingeanu
    Commented Aug 24, 2017 at 7:11

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