You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
helix-plus/helix-syntax/src/lib.rs

32 lines
1.1 KiB
Rust

use anyhow::{Context, Result};
use libloading::{Library, Symbol};
use tree_sitter::Language;
fn replace_dashes_with_underscores(name: &str) -> String {
name.replace('-', "_")
}
#[cfg(unix)]
const DYLIB_EXTENSION: &str = "so";
#[cfg(windows)]
const DYLIB_EXTENSION: &str = "dll";
pub fn get_language(runtime_path: &std::path::Path, name: &str) -> Result<Language> {
let name = name.to_ascii_lowercase();
let mut library_path = runtime_path.join("grammars").join(&name);
// TODO: duplicated under build
library_path.set_extension(DYLIB_EXTENSION);
let library = unsafe { Library::new(&library_path) }
.with_context(|| format!("Error opening dynamic library {:?}", &library_path))?;
let language_fn_name = format!("tree_sitter_{}", replace_dashes_with_underscores(&name));
let language = unsafe {
let language_fn: Symbol<unsafe extern "C" fn() -> Language> = library
.get(language_fn_name.as_bytes())
.with_context(|| format!("Failed to load symbol {}", language_fn_name))?;
language_fn()
};
std::mem::forget(library);
Ok(language)
}