tree-sitter-wdl

A tree-sitter grammar for WDL.

Overview

This grammar supports WDL versions 1.0 through 1.3, including enum definitions, env declarations, and else if/else conditional clauses. It provides syntax highlighting, code folding, and language injection for bash within command blocks.

Generated files (src/parser.c, src/grammar.json, src/node-types.json) are checked in so that consumers do not need a Node.js toolchain.

Usage

Build

npm install
npx tree-sitter generate

Test

npx tree-sitter test

Parse a file

npx tree-sitter parse example.wdl

📝 License and Legal

This project is licensed as either Apache 2.0 or MIT at your discretion. Additionally, please see the disclaimer that applies to all crates and command line tools made available by St. Jude Rust Labs.

Copyright © 2026-Present St. Jude Children's Research Hospital.