README.md

tree-sitter-rescript (vendoring manifest)

This directory is a manifest-only vendoring of the canonical rescript-lang/tree-sitter-rescript grammar. The grammar itself is not copied into this repository — package.json declares it as a dependency, and scripts/install.sh fetches and builds it at the pinned commit.

The grammar is consumed by tools/res-to-affine/, the .res → .affine migration assistant (affinescript#57). It is not an editor binding for AffineScript; for that, see editors/tree-sitter-affinescript/.

Pinned upstream

• Repository: https://github.com/rescript-lang/tree-sitter-rescript
• Commit: 990214a83f25801dfe0226bd7e92bb71bba1970f
• Version: 6.0.0
• License: MIT (preserved upstream; compatible with this repo's MPL-2.0)

When updating the pin, regenerate tools/res-to-affine/test/expected/ snapshots, since AST shapes may shift.

Install

./scripts/install.sh

This writes a tree-sitter-rescript directory under tools/vendor/ (gitignored — same convention as the WASI adapter pinning), containing the generated parser. Requires git and tree-sitter CLI on PATH.

Why manifest, not copy

The upstream grammar is ~10k lines of JS plus generated C. Copying it into this MPL-2.0 repo would (a) bloat the tree, (b) create an ongoing sync burden, and (c) duplicate MIT-licensed code we have no business modifying. The manifest+install approach keeps the dependency explicit and pinned without absorbing the source.