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feat: support compiling to wasm32-unknown-unknown

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This commit is contained in:
Amaan Qureshi 2025-09-13 05:36:32 -04:00 • committed by Amaan Qureshi
parent 46ea65c89b
commit 22553b3372
20 changed files with 787 additions and 12 deletions
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45
crates/cli/src/init.rs
View file

@ -389,9 +389,48 @@ pub fn generate_grammar_files(
generate_file(path, LIB_RS_TEMPLATE, language_name, &generate_opts)
})?;
missing_path(path.join("build.rs"), |path| {
generate_file(path, BUILD_RS_TEMPLATE, language_name, &generate_opts)
})?;
missing_path_else(
path.join("build.rs"),
allow_update,
|path| generate_file(path, BUILD_RS_TEMPLATE, language_name, &generate_opts),
|path| {
let replacement = indoc!{r#"
c_config.flag("-utf-8");
if std::env::var("TARGET").unwrap() == "wasm32-unknown-unknown" {
let Ok(wasm_headers) = std::env::var("DEP_TREE_SITTER_LANGUAGE_WASM_HEADERS") else {
panic!("Environment variable DEP_TREE_SITTER_LANGUAGE_WASM_HEADERS must be set by the language crate");
};
let Ok(wasm_src) =
std::env::var("DEP_TREE_SITTER_LANGUAGE_WASM_SRC").map(std::path::PathBuf::from)
else {
panic!("Environment variable DEP_TREE_SITTER_LANGUAGE_WASM_SRC must be set by the language crate");
};
c_config.include(&wasm_headers);
c_config.files([
wasm_src.join("stdio.c"),
wasm_src.join("stdlib.c"),
wasm_src.join("string.c"),
]);
}
"#};
let indented_replacement = replacement
.lines()
.map(|line| if line.is_empty() { line.to_string() } else { format!(" {line}") })
.collect::<Vec<_>>()
.join("\n");
let mut contents = fs::read_to_string(path)?;
if !contents.contains("wasm32-unknown-unknown") {
contents = contents.replace(r#" c_config.flag("-utf-8");"#, &indented_replacement);
}
write_file(path, contents)?;
Ok(())
},
)?;
missing_path_else(
repo_path.join("Cargo.toml"),

18
crates/cli/src/templates/build.rs
View file

@ -7,6 +7,24 @@ fn main() {
#[cfg(target_env = "msvc")]
c_config.flag("-utf-8");
if std::env::var("TARGET").unwrap() == "wasm32-unknown-unknown" {
let Ok(wasm_headers) = std::env::var("DEP_TREE_SITTER_LANGUAGE_WASM_HEADERS") else {
panic!("Environment variable DEP_TREE_SITTER_LANGUAGE_WASM_HEADERS must be set by the language crate");
};
let Ok(wasm_src) =
std::env::var("DEP_TREE_SITTER_LANGUAGE_WASM_SRC").map(std::path::PathBuf::from)
else {
panic!("Environment variable DEP_TREE_SITTER_LANGUAGE_WASM_SRC must be set by the language crate");
};
c_config.include(&wasm_headers);
c_config.files([
wasm_src.join("stdio.c"),
wasm_src.join("stdlib.c"),
wasm_src.join("string.c"),
]);
}
let parser_path = src_dir.join("parser.c");
c_config.file(&parser_path);
println!("cargo:rerun-if-changed={}", parser_path.to_str().unwrap());