Bazel rules for sass

This is an alternative Bazel ruleset to compile Sass stylesheets. It has the exact same API as the official rules_sass, but the difference is that gzgz_rules_sass wraps the Dart Sass executable directly, while rules_sass calls Dart Sass through NodeJS and therefore is slower and pulls in more unnecessary dependencies, especially if your project runs on a different version of NodeJS or if you project doesn't need NodeJS at all.

This ruleset adopts the Toolchain and Platforms API and special care has been taken to make it RBE-compatible, but this is not thoroughly tested.

Installation

bzlmod

bazel_dep(name = "gzgz_rules_sass", version = "1.0.0")

sass = use_extension("@gzgz_rules_sass//sass:extensions.bzl", "sass")

sass.toolchain(sass_version = "1.63.6")
use_repo(sass, "sass_toolchains")

register_toolchains("@sass_toolchains//:all")

By default, the Sass toolchain name is @sass_toolchains, so the sass_version specified becomes the version that is enforced on all dependencies that also used the default name.

However, if you'd like to use a specific version only in your project, then you can explicitly set a name when registering Sass toolchain, which will differentiate it from the default Sass toolchain:

sass = use_extension("@gzgz_rules_sass//sass:extensions.bzl", "sass")
sass.toolchain(
    name = "dart_sass",
    sass_version = "1.63.6",
)
use_repo(sass, "dart_sass_toolchains")

register_toolchains("@dart_sass_toolchains//:all")

WORKSPACE

From the release you wish to use: https://github.com/GZGavinZhao/gzgz_rules_sass/releases copy the WORKSPACE snippet into your WORKSPACE file.

To use a commit rather than a release, you can point at any SHA of the repo.

For example to use commit abc123:

1. Replace url = "https://github.com/GZGavinZhao/gzgz_rules_sass/releases/download/v0.1.0/gzgz_rules_sass-v0.1.0.tar.gz" with a GitHub-provided source archive like url = "https://github.com/GZGavinZhao/gzgz_rules_sass/archive/abc123.tar.gz"
2. Replace strip_prefix = "gzgz_rules_sass-0.1.0" with strip_prefix = "gzgz_rules_sass-abc123"
3. Update the sha256. The easiest way to do this is to comment out the line, then Bazel will print a message with the correct value. Note that GitHub source archives don't have a strong guarantee on the sha256 stability, see https://github.blog/2023-02-21-update-on-the-future-stability-of-source-code-archives-and-hashes/