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-rw-r--r--helix-loader/src/config.rs18
-rw-r--r--helix-loader/src/lib.rs36
2 files changed, 35 insertions, 19 deletions
diff --git a/helix-loader/src/config.rs b/helix-loader/src/config.rs
index a8c84361..259b1318 100644
--- a/helix-loader/src/config.rs
+++ b/helix-loader/src/config.rs
@@ -19,7 +19,23 @@ pub fn user_lang_config() -> Result<toml::Value, toml::de::Error> {
.into_iter()
.chain([default_lang_config()].into_iter())
.fold(toml::Value::Table(toml::value::Table::default()), |a, b| {
- crate::merge_toml_values(b, a, true)
+ // combines for example
+ // b:
+ // [[language]]
+ // name = "toml"
+ // language-server = { command = "taplo", args = ["lsp", "stdio"] }
+ //
+ // a:
+ // [[language]]
+ // language-server = { command = "/usr/bin/taplo" }
+ //
+ // into:
+ // [[language]]
+ // name = "toml"
+ // language-server = { command = "/usr/bin/taplo" }
+ //
+ // thus it overrides the third depth-level of b with values of a if they exist, but otherwise merges their values
+ crate::merge_toml_values(b, a, 3)
});
Ok(config)
diff --git a/helix-loader/src/lib.rs b/helix-loader/src/lib.rs
index ff4414b2..1ba48e7b 100644
--- a/helix-loader/src/lib.rs
+++ b/helix-loader/src/lib.rs
@@ -113,11 +113,7 @@ pub fn find_root_impl(root: Option<&str>, root_markers: &[String]) -> Vec<std::p
/// documents that use a top-level array of values like the `languages.toml`,
/// where one usually wants to override or add to the array instead of
/// replacing it altogether.
-pub fn merge_toml_values(
- left: toml::Value,
- right: toml::Value,
- merge_toplevel_arrays: bool,
-) -> toml::Value {
+pub fn merge_toml_values(left: toml::Value, right: toml::Value, merge_depth: usize) -> toml::Value {
use toml::Value;
fn get_name(v: &Value) -> Option<&str> {
@@ -131,7 +127,7 @@ pub fn merge_toml_values(
// that you can specify a sub-set of languages in an overriding
// `languages.toml` but that nested arrays like Language Server
// arguments are replaced instead of merged.
- if merge_toplevel_arrays {
+ if merge_depth > 0 {
left_items.reserve(right_items.len());
for rvalue in right_items {
let lvalue = get_name(&rvalue)
@@ -140,7 +136,7 @@ pub fn merge_toml_values(
})
.map(|lpos| left_items.remove(lpos));
let mvalue = match lvalue {
- Some(lvalue) => merge_toml_values(lvalue, rvalue, false),
+ Some(lvalue) => merge_toml_values(lvalue, rvalue, merge_depth - 1),
None => rvalue,
};
left_items.push(mvalue);
@@ -151,18 +147,22 @@ pub fn merge_toml_values(
}
}
(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, merge_toplevel_arrays);
- left_map.insert(rname, merged_value);
- }
- None => {
- left_map.insert(rname, rvalue);
+ if merge_depth > 0 {
+ for (rname, rvalue) in right_map {
+ match left_map.remove(&rname) {
+ Some(lvalue) => {
+ let merged_value = merge_toml_values(lvalue, rvalue, merge_depth - 1);
+ left_map.insert(rname, merged_value);
+ }
+ None => {
+ left_map.insert(rname, rvalue);
+ }
}
}
+ Value::Table(left_map)
+ } else {
+ Value::Table(right_map)
}
- Value::Table(left_map)
}
// Catch everything else we didn't handle, and use the right value
(_, value) => value,
@@ -187,7 +187,7 @@ mod merge_toml_tests {
.expect("Couldn't parse built-in languages config");
let user: Value = toml::from_str(USER).unwrap();
- let merged = merge_toml_values(base, user, true);
+ let merged = merge_toml_values(base, user, 3);
let languages = merged.get("language").unwrap().as_array().unwrap();
let nix = languages
.iter()
@@ -220,7 +220,7 @@ mod merge_toml_tests {
.expect("Couldn't parse built-in languages config");
let user: Value = toml::from_str(USER).unwrap();
- let merged = merge_toml_values(base, user, true);
+ let merged = merge_toml_values(base, user, 3);
let languages = merged.get("language").unwrap().as_array().unwrap();
let ts = languages
.iter()