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pub mod grammar;
use etcetera::base_strategy::{choose_base_strategy, BaseStrategy};
pub static RUNTIME_DIR: once_cell::sync::Lazy<std::path::PathBuf> =
once_cell::sync::Lazy::new(runtime_dir);
pub fn runtime_dir() -> std::path::PathBuf {
if let Ok(dir) = std::env::var("HELIX_RUNTIME") {
return dir.into();
}
const RT_DIR: &str = "runtime";
let conf_dir = config_dir().join(RT_DIR);
if conf_dir.exists() {
return conf_dir;
}
if let Ok(dir) = std::env::var("CARGO_MANIFEST_DIR") {
// this is the directory of the crate being run by cargo, we need the workspace path so we take the parent
return std::path::PathBuf::from(dir).parent().unwrap().join(RT_DIR);
}
// fallback to location of the executable being run
std::env::current_exe()
.ok()
.and_then(|path| path.parent().map(|path| path.to_path_buf().join(RT_DIR)))
.unwrap()
}
pub fn config_dir() -> std::path::PathBuf {
// TODO: allow env var override
let strategy = choose_base_strategy().expect("Unable to find the config directory!");
let mut path = strategy.config_dir();
path.push("helix");
path
}
pub fn cache_dir() -> std::path::PathBuf {
// TODO: allow env var override
let strategy = choose_base_strategy().expect("Unable to find the config directory!");
let mut path = strategy.cache_dir();
path.push("helix");
path
}
pub fn config_file() -> std::path::PathBuf {
config_dir().join("config.toml")
}
pub fn lang_config_file() -> std::path::PathBuf {
config_dir().join("languages.toml")
}
pub fn log_file() -> std::path::PathBuf {
cache_dir().join("helix.log")
}
/// Default bultin-in languages.toml.
pub fn default_lang_config() -> toml::Value {
toml::from_slice(include_bytes!("../../languages.toml"))
.expect("Could not parse bultin-in languages.toml to valid toml")
}
/// User configured languages.toml file, merged with the default config.
pub fn user_lang_config() -> Result<toml::Value, toml::de::Error> {
let def_lang_conf = default_lang_config();
let data = std::fs::read(crate::config_dir().join("languages.toml"));
let user_lang_conf = match data {
Ok(raw) => {
let value = toml::from_slice(&raw)?;
merge_toml_values(def_lang_conf, value)
}
Err(_) => def_lang_conf,
};
Ok(user_lang_conf)
}
// right overrides left
pub fn merge_toml_values(left: toml::Value, right: toml::Value) -> toml::Value {
use toml::Value;
fn get_name(v: &Value) -> Option<&str> {
v.get("name").and_then(Value::as_str)
}
match (left, right) {
(Value::Array(mut left_items), Value::Array(right_items)) => {
left_items.reserve(right_items.len());
for rvalue in right_items {
let lvalue = get_name(&rvalue)
.and_then(|rname| left_items.iter().position(|v| get_name(v) == Some(rname)))
.map(|lpos| left_items.remove(lpos));
let mvalue = match lvalue {
Some(lvalue) => merge_toml_values(lvalue, rvalue),
None => rvalue,
};
left_items.push(mvalue);
}
Value::Array(left_items)
}
(Value::Table(mut left_map), Value::Table(right_map)) => {
for (rname, rvalue) in right_map {
match left_map.remove(&rname) {
Some(lvalue) => {
let merged_value = merge_toml_values(lvalue, rvalue);
left_map.insert(rname, merged_value);
}
None => {
left_map.insert(rname, rvalue);
}
}
}
Value::Table(left_map)
}
// Catch everything else we didn't handle, and use the right value
(_, value) => value,
}
}
#[cfg(test)]
mod merge_toml_tests {
use super::merge_toml_values;
#[test]
fn language_tomls() {
use toml::Value;
const USER: &str = "
[[language]]
name = \"nix\"
test = \"bbb\"
indent = { tab-width = 4, unit = \" \", test = \"aaa\" }
";
let base: Value = toml::from_slice(include_bytes!("../../languages.toml"))
.expect("Couldn't parse built-in languages config");
let user: Value = toml::from_str(USER).unwrap();
let merged = merge_toml_values(base, user);
let languages = merged.get("language").unwrap().as_array().unwrap();
let nix = languages
.iter()
.find(|v| v.get("name").unwrap().as_str().unwrap() == "nix")
.unwrap();
let nix_indent = nix.get("indent").unwrap();
// We changed tab-width and unit in indent so check them if they are the new values
assert_eq!(
nix_indent.get("tab-width").unwrap().as_integer().unwrap(),
4
);
assert_eq!(nix_indent.get("unit").unwrap().as_str().unwrap(), " ");
// We added a new keys, so check them
assert_eq!(nix.get("test").unwrap().as_str().unwrap(), "bbb");
assert_eq!(nix_indent.get("test").unwrap().as_str().unwrap(), "aaa");
// We didn't change comment-token so it should be same
assert_eq!(nix.get("comment-token").unwrap().as_str().unwrap(), "#");
}
}
|
