language — mapping paths to grammars
detect_language(path) maps a file path to the tree-sitter
[Language] for its extension:
pub fn detect_language(path: &str) -> Option<Language>Returns None for unknown extensions (callers treat that as “unsupported
language” and skip parsing). Detection is case-insensitive on the filename
for Dockerfile, and extension-based for everything else.
Supported extensions
| Grammar | Extensions |
|---|---|
| JavaScript | js, jsx, mjs, cjs |
| C# | cs |
| Astro | astro |
| Bash | bash, bats, cgi, command, env, fcgi, ksh, sh, tmux, tool, zsh |
| C | c, h |
| CMake | cmake |
| C++ | cc, hpp, cpp, c++, hh, cxx, cu, ino |
| Dart | dart |
| Clojure | clj, cljs, cljc, edn |
| CSS | css, scss |
| Diff | diff, patch |
| Elisp | el |
| Elixir | ex, exs |
| Erlang | erl, hrl |
| Fortran | f90, F90, f95, F95, f03, F03, f08, F08 |
| Go | go |
| GraphQL | graphql, gql |
| Haskell | hs, lhs |
| HCL | hcl, tf, tfvars |
| HTML | html, htm, xhtml |
| INI | ini, cfg, conf, properties |
| Java | java |
| JSON | json |
| Julia | jl |
| Kotlin | kt, ktm, kts |
| Lua | lua |
| Make | mk, mak |
| Markdown | md, markdown, mdx |
| Nix | nix |
| Objective-C | m |
| OCaml | ml |
| Odin | odin |
| PHP | php |
| PowerShell | ps1, psm1 |
| Protobuf | proto |
| Python | py, py3, pyi, bzl |
| R | r |
| Ruby | rb, rbw, gemspec |
| Rust | rs |
| Scala | scala, sc, sbt |
| Solidity | sol |
| SQL | sql |
| Starlark | star |
| Svelte | svelte |
| Swift | swift |
| TOML | toml |
| TLA+ | tla |
| TypeScript | ts (TS), tsx (TSX) |
| Verilog | verilog |
| Vue | vue |
| XML | xml |
| YAML | yaml, yml |
| Zig | zig, zon |
Plus the special case: a file literally named Dockerfile (any case) maps
to the Dockerfile grammar.
The extension set deliberately mirrors the ast-grep registry in
crate::ast — kept independent so the low-level parse
cache does not depend on the structural-matching engine.