git.iko.soy/helix
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helix/helix-syntax/src/lib.rs
31 lines 1.1 kB history raw
1use anyhow::{Context, Result};
2use libloading::{Library, Symbol};
3use tree_sitter::Language;
5fn replace_dashes_with_underscores(name: &str) -> String {
6 name.replace('-', "_")
7}
8#[cfg(unix)]
9const DYLIB_EXTENSION: &str = "so";
11#[cfg(windows)]
12const DYLIB_EXTENSION: &str = "dll";
14pub fn get_language(runtime_path: &std::path::Path, name: &str) -> Result<Language> {
15 let name = name.to_ascii_lowercase();
16 let mut library_path = runtime_path.join("grammars").join(&name);
17 // TODO: duplicated under build
18 library_path.set_extension(DYLIB_EXTENSION);
20 let library = unsafe { Library::new(&library_path) }
21 .with_context(|| format!("Error opening dynamic library {:?}", &library_path))?;
22 let language_fn_name = format!("tree_sitter_{}", replace_dashes_with_underscores(&name));
23 let language = unsafe {
24 let language_fn: Symbol<unsafe extern "C" fn() -> Language> = library
25 .get(language_fn_name.as_bytes())
26 .with_context(|| format!("Failed to load symbol {}", language_fn_name))?;
27 language_fn()
28 };
29 std::mem::forget(library);
30 Ok(language)