infra-sk/remove_css_imports_from_js/index.bzl

# Removes CSS files imported from a JavaScript file via a require() call.
#
# Useful for removing CSS imports from UMD bundles generated with npm_umd_bundle(), which typically
# generate errors when loaded from a karma_mocha_test() or a karma_web_test().
#
# This macro should be deleted once we are completely off Webpack and all our Sass/CSS imports from
# TypeScript code have been removed.
def remove_css_imports_from_js(name, src, out):
    native.genrule(
        name = name,
        srcs = [src],
        outs = [out],
        cmd = "sed 's/^[ \t]*require(.*\.[s]\?css.);\?//' $< > $@",
    )