ast-grep(sg)

ast-grep(sg) is a lightning fast and user friendly tool for code searching, linting, rewriting at large scale.

This is the website source for ast-grep!

Setup Guide

Unfortunately wasm-pack does not support compiling C dependency with stdlib. ~~We have to use emcc.~~

We have to use web-tree-sitter

To setup:

Run the following script, which is needed for dev-time wasm bundling:

cd website/.vitepress/cache/deps
ln -s ../../../../pkg/ast_grep_wasm_bg.wasm
cd ../../../..

You need to upgrade tree-sitter to the latest version.

You also need to copy the tree-sitter.wasm to the public directory because vite's building convention.

You will usually have weird error messages like tree-sitter.wasm is not found or having wrong LinkError of undefined methods like exit.

emcc setup is not used any more

~~

Install emcc
rustup target add wasm32-unknown-emscripten
cargo install -f wasm-bindgen-cli
EMCC_CFLAGS="-s ERROR_ON_UNDEFINED_SYMBOLS=0 --no-entry" cargo build --target wasm32-unknown-emscripten
wasm-bindgen --target web ../../target/wasm32-unknown-emscripten/debug/ast_grep_wasm.wasm --out-dir pkg

It requires tree-sitter.wasm and tree-sitter-{lang}.wasm available in public directory.

Language specific wasm must be built with the same emcc version of the tree-sitter.wasm.

Mismatching emcc version will raise RuntimeError.