This crate provides nix language support for the tree-sitter parsing library.

Typically, you will use the language function to add this language to a tree-sitter Parser, and then use the parser to parse some code:

use tree_sitter::Parser;

let code = r#"
let
  b = a + 1;
  a = 1;
in
a + b
"#;
let mut parser = Parser::new();
let language = tree_sitter_nix::LANGUAGE;
parser
    .set_language(&language.into())
    .expect("Error loading nix parser");
let tree = parser.parse(code, None).unwrap();
assert!(!tree.root_node().has_error());

tree-sitter-nix

Nix grammar for tree-sitter.