mirror of https://github.com/helix-editor/helix
migrate grammar fetching/building code into helix-loader crate
This is a rather large refactor that moves most of the code for loading, fetching, and building grammars into a new helix-loader module. This works well with the [[grammars]] syntax for languages.toml defined earlier: we only have to depend on the types for GrammarConfiguration in helix-loader and can leave all the [[language]] entries for helix-core.pull/1784/head
Michael Davis
3 years ago
committed by
Blaž Hrastnik
parent
08ee949dcb
commit
4fc991fdec
@ -1,33 +1,10 @@
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use crate::merge_toml_values;
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/// Default bultin-in languages.toml.
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pub fn default_lang_config() -> toml::Value {
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toml::from_slice(include_bytes!("../../languages.toml"))
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.expect("Could not parse bultin-in languages.toml to valid toml")
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}
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/// User configured languages.toml file, merged with the default config.
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pub fn user_lang_config() -> Result<toml::Value, toml::de::Error> {
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let def_lang_conf = default_lang_config();
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let data = std::fs::read(crate::config_dir().join("languages.toml"));
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let user_lang_conf = match data {
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Ok(raw) => {
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let value = toml::from_slice(&raw)?;
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merge_toml_values(def_lang_conf, value)
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}
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Err(_) => def_lang_conf,
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};
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Ok(user_lang_conf)
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}
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/// Syntax configuration loader based on built-in languages.toml.
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pub fn default_syntax_loader() -> crate::syntax::Configuration {
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default_lang_config()
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helix_loader::default_lang_config()
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.try_into()
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.expect("Could not serialize built-in languages.toml")
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}
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/// Syntax configuration loader based on user configured languages.toml.
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pub fn user_syntax_loader() -> Result<crate::syntax::Configuration, toml::de::Error> {
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user_lang_config()?.try_into()
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helix_loader::user_lang_config()?.try_into()
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}
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@ -0,0 +1,23 @@
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[package]
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name = "helix-loader"
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version = "0.6.0"
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description = "A post-modern text editor."
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authors = ["Blaž Hrastnik <blaz@mxxn.io>"]
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edition = "2021"
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license = "MPL-2.0"
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categories = ["editor"]
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repository = "https://github.com/helix-editor/helix"
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homepage = "https://helix-editor.com"
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[dependencies]
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anyhow = "1"
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serde = { version = "1.0", features = ["derive"] }
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toml = "0.5"
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etcetera = "0.3"
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tree-sitter = "0.20"
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libloading = "0.7"
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once_cell = "1.9"
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# cloning/compiling tree-sitter grammars
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cc = { version = "1" }
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threadpool = { version = "1.0" }
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@ -0,0 +1,6 @@
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fn main() {
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println!(
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"cargo:rustc-env=BUILD_TARGET={}",
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std::env::var("TARGET").unwrap()
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);
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}
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@ -0,0 +1,161 @@
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pub mod grammar;
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use etcetera::base_strategy::{choose_base_strategy, BaseStrategy};
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pub static RUNTIME_DIR: once_cell::sync::Lazy<std::path::PathBuf> =
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once_cell::sync::Lazy::new(runtime_dir);
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pub fn runtime_dir() -> std::path::PathBuf {
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if let Ok(dir) = std::env::var("HELIX_RUNTIME") {
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return dir.into();
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}
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const RT_DIR: &str = "runtime";
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let conf_dir = config_dir().join(RT_DIR);
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if conf_dir.exists() {
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return conf_dir;
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}
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if let Ok(dir) = std::env::var("CARGO_MANIFEST_DIR") {
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// this is the directory of the crate being run by cargo, we need the workspace path so we take the parent
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return std::path::PathBuf::from(dir).parent().unwrap().join(RT_DIR);
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}
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// fallback to location of the executable being run
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std::env::current_exe()
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.ok()
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.and_then(|path| path.parent().map(|path| path.to_path_buf().join(RT_DIR)))
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.unwrap()
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}
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pub fn config_dir() -> std::path::PathBuf {
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// TODO: allow env var override
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let strategy = choose_base_strategy().expect("Unable to find the config directory!");
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let mut path = strategy.config_dir();
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path.push("helix");
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path
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}
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pub fn cache_dir() -> std::path::PathBuf {
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// TODO: allow env var override
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let strategy = choose_base_strategy().expect("Unable to find the config directory!");
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let mut path = strategy.cache_dir();
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path.push("helix");
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path
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}
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pub fn config_file() -> std::path::PathBuf {
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config_dir().join("config.toml")
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}
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pub fn lang_config_file() -> std::path::PathBuf {
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config_dir().join("languages.toml")
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}
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pub fn log_file() -> std::path::PathBuf {
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cache_dir().join("helix.log")
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}
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/// Default bultin-in languages.toml.
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pub fn default_lang_config() -> toml::Value {
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toml::from_slice(include_bytes!("../../languages.toml"))
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.expect("Could not parse bultin-in languages.toml to valid toml")
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}
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/// User configured languages.toml file, merged with the default config.
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pub fn user_lang_config() -> Result<toml::Value, toml::de::Error> {
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let def_lang_conf = default_lang_config();
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let data = std::fs::read(crate::config_dir().join("languages.toml"));
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let user_lang_conf = match data {
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Ok(raw) => {
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let value = toml::from_slice(&raw)?;
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merge_toml_values(def_lang_conf, value)
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}
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Err(_) => def_lang_conf,
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};
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Ok(user_lang_conf)
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}
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// right overrides left
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pub fn merge_toml_values(left: toml::Value, right: toml::Value) -> toml::Value {
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use toml::Value;
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fn get_name(v: &Value) -> Option<&str> {
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v.get("name").and_then(Value::as_str)
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}
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match (left, right) {
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(Value::Array(mut left_items), Value::Array(right_items)) => {
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left_items.reserve(right_items.len());
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for rvalue in right_items {
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let lvalue = get_name(&rvalue)
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.and_then(|rname| left_items.iter().position(|v| get_name(v) == Some(rname)))
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.map(|lpos| left_items.remove(lpos));
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let mvalue = match lvalue {
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Some(lvalue) => merge_toml_values(lvalue, rvalue),
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None => rvalue,
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};
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left_items.push(mvalue);
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}
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Value::Array(left_items)
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}
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(Value::Table(mut left_map), Value::Table(right_map)) => {
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for (rname, rvalue) in right_map {
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match left_map.remove(&rname) {
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Some(lvalue) => {
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let merged_value = merge_toml_values(lvalue, rvalue);
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left_map.insert(rname, merged_value);
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}
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None => {
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left_map.insert(rname, rvalue);
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}
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}
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}
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Value::Table(left_map)
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}
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// Catch everything else we didn't handle, and use the right value
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(_, value) => value,
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}
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}
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#[cfg(test)]
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mod merge_toml_tests {
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use super::merge_toml_values;
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#[test]
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fn language_tomls() {
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use toml::Value;
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const USER: &str = "
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[[language]]
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name = \"nix\"
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test = \"bbb\"
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indent = { tab-width = 4, unit = \" \", test = \"aaa\" }
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";
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let base: Value = toml::from_slice(include_bytes!("../../languages.toml"))
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.expect("Couldn't parse built-in languages config");
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let user: Value = toml::from_str(USER).unwrap();
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let merged = merge_toml_values(base, user);
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let languages = merged.get("language").unwrap().as_array().unwrap();
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let nix = languages
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.iter()
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.find(|v| v.get("name").unwrap().as_str().unwrap() == "nix")
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.unwrap();
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let nix_indent = nix.get("indent").unwrap();
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// We changed tab-width and unit in indent so check them if they are the new values
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assert_eq!(
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nix_indent.get("tab-width").unwrap().as_integer().unwrap(),
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4
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);
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assert_eq!(nix_indent.get("unit").unwrap().as_str().unwrap(), " ");
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// We added a new keys, so check them
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assert_eq!(nix.get("test").unwrap().as_str().unwrap(), "bbb");
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assert_eq!(nix_indent.get("test").unwrap().as_str().unwrap(), "aaa");
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// We didn't change comment-token so it should be same
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assert_eq!(nix.get("comment-token").unwrap().as_str().unwrap(), "#");
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}
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}
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