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Start work on ability to load wasm languages from native lib, via wasmtime

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This commit is contained in:
Max Brunsfeld 2022-01-03 10:57:01 -08:00
parent 8883d43bee
commit 3f1a7f9cd4
19 changed files with 2989 additions and 284 deletions
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30
cli/src/wasm.rs
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@ -1,14 +1,31 @@
use super::generate::parse_grammar::GrammarJSON;
use anyhow::{anyhow, Context, Result};
use std::ffi::{OsStr, OsString};
use std::fs;
use std::path::Path;
use std::process::Command;
use std::{
ffi::{OsStr, OsString},
fs,
path::Path,
process::Command,
};
use which::which;
const EMSCRIPTEN_TAG: &'static str = concat!("emscripten/emsdk:", env!("EMSCRIPTEN_VERSION"));
pub fn get_grammar_name(src_dir: &Path) -> Result<String> {
pub fn load_language_wasm_file(language_dir: &Path) -> Result<(String, Vec<u8>)> {
let grammar_name = get_grammar_name(&language_dir)
.with_context(|| "Failed to get wasm filename")
.unwrap();
let wasm_filename = format!("tree-sitter-{}.wasm", grammar_name);
let contents = fs::read(language_dir.join(&wasm_filename)).with_context(|| {
format!(
"Failed to read {}. Run `tree-sitter build-wasm` first.",
wasm_filename
)
})?;
Ok((grammar_name, contents))
}
pub fn get_grammar_name(language_dir: &Path) -> Result<String> {
let src_dir = language_dir.join("src");
let grammar_json_path = src_dir.join("grammar.json");
let grammar_json = fs::read_to_string(&grammar_json_path)
.with_context(|| format!("Failed to read grammar file {:?}", grammar_json_path))?;
@ -18,8 +35,7 @@ pub fn get_grammar_name(src_dir: &Path) -> Result<String> {
}
pub fn compile_language_to_wasm(language_dir: &Path, force_docker: bool) -> Result<()> {
let src_dir = language_dir.join("src");
let grammar_name = get_grammar_name(&src_dir)?;
let grammar_name = get_grammar_name(&language_dir)?;
let output_filename = format!("tree-sitter-{}.wasm", grammar_name);
let emcc_bin = if cfg!(windows) { "emcc.bat" } else { "emcc" };