grass

An implementation of the SASS spec in pure Rust

This crate aims to provide a high level interface for compiling SASS into plain CSS. It offers a very limited API, currently exposing only 2 structs.

In addition to a library, also included is a binary that is intended to act as an invisible replacement to the sass commandline executable.

This crate aims to achieve complete feature parity with the dart-sass reference implementation. A deviation from the dart-sass implementation can be considered a bug except for in the following situations:

• Error messages
• Error spans
• Certain aspects of the indented syntax
• Potentially others in the future

Documentation
crates.io

The large features remaining are

all builtin selector functions (274 tests)
builtin functions content-exists, min, max
@extend (~600 tests)
indented syntax (27 tests)
a special parser for plain css
@use and module system (~1200 tests)
@forward (~400 tests)
@keyframes (~30 tests)
@supports (~128 tests)

To run the official test suite,

git clone https://github.com/connorskees/grass
cd grass
git submodule init
git submodule update
cargo b --release
./sass-spec/sass-spec.rb -c './target/release/grass'

2020-04-21
PASSING: 2150
FAILING: 2943
TOTAL: 5093

2020-04-07
PASSING: 2031
FAILING: 3062
TOTAL: 5093

2020-04-01
PASSING: 1711
FAILING: 3382
TOTAL: 5093

2020-03-30
PASSING: 1685
FAILING: 3408
TOTAL: 5093

2020-03-23
PASSING: 1547
FAILING: 3546
TOTAL: 5093

2020-03-22
PASSING: 1442
FAILING: 3651
TOTAL: 5093

2020-02-24
PASSING: 1192
FAILING: 3901
TOTAL: 5093

2020-02-17
PASSING: 1115
FAILING: 3978
TOTAL: 5093

2020-02-10
PASSING: 475
FAILING: 4618
TOTAL: 5093

2020-02-03
PASSING: 242
FAILING: 4851
TOTAL: 5093

2020-01-27
PASSING: 186
FAILING: 4907
TOTAL: 5093

2020-01-20
PASSING: 143
FAILING: 4950
TOTAL: 5093