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pub mod config;
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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 local_config_dirs() -> Vec<std::path::PathBuf> {
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let directories = find_root_impl(None, &[".helix".to_string()])
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.into_iter()
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.map(|path| path.join(".helix"))
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.collect();
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log::debug!("Located configuration folders: {:?}", directories);
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directories
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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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pub fn find_root_impl(root: Option<&str>, root_markers: &[String]) -> Vec<std::path::PathBuf> {
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let current_dir = std::env::current_dir().expect("unable to determine current directory");
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let mut directories = Vec::new();
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let root = match root {
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Some(root) => {
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let root = std::path::Path::new(root);
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if root.is_absolute() {
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root.to_path_buf()
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} else {
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current_dir.join(root)
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}
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}
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None => current_dir,
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};
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for ancestor in root.ancestors() {
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// don't go higher than repo
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if ancestor.join(".git").is_dir() {
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// Use workspace if detected from marker
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directories.push(ancestor.to_path_buf());
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break;
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} else if root_markers
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.iter()
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.any(|marker| ancestor.join(marker).exists())
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{
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directories.push(ancestor.to_path_buf());
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}
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}
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directories
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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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