@@ -98,24 +98,8 @@ pub fn find_root_impl(root: Option<&str>, root_markers: &[String]) -> Vec<std::p
9898 directories
9999}
100100
101−/// Merge two TOML documents, merging values from `right` onto `left`
102−///
103−/// When an array exists in both `left` and `right`, `right`'s array is
104−/// used. When a table exists in both `left` and `right`, the merged table
105−/// consists of all keys in `left`'s table unioned with all keys in `right`
106−/// with the values of `right` being merged recursively onto values of
107−/// `left`.
108−///
109−/// `merge_toplevel_arrays` controls whether a top-level array in the TOML
110−/// document is merged instead of overridden. This is useful for TOML
111−/// documents that use a top-level array of values like the `languages.toml`,
112−/// where one usually wants to override or add to the array instead of
113−/// replacing it altogether.
114−pub fn merge_toml_values(
115− left: toml::Value,
116− right: toml::Value,
117− merge_toplevel_arrays: bool,
118−) -> toml::Value {
101+// right overrides left
102+pub fn merge_toml_values(left: toml::Value, right: toml::Value) -> toml::Value {
119103 use toml::Value;
120104
121105 fn get_name(v: &Value) -> Option<&str> {
@@ -124,35 +108,24 @@ pub fn merge_toml_values(
124108
125109 match (left, right) {
126110 (Value::Array(mut left_items), Value::Array(right_items)) => {
127− // The top-level arrays should be merged but nested arrays should
128− // act as overrides. For the `languages.toml` config, this means
129− // that you can specify a sub-set of languages in an overriding
130− // `languages.toml` but that nested arrays like Language Server
131− // arguments are replaced instead of merged.
132− if merge_toplevel_arrays {
133− left_items.reserve(right_items.len());
134− for rvalue in right_items {
135− let lvalue = get_name(&rvalue)
136− .and_then(|rname| {
137− left_items.iter().position(|v| get_name(v) == Some(rname))
138− })
139− .map(|lpos| left_items.remove(lpos));
140− let mvalue = match lvalue {
141− Some(lvalue) => merge_toml_values(lvalue, rvalue, false),
142− None => rvalue,
143− };
144− left_items.push(mvalue);
145− }
146− Value::Array(left_items)
147− } else {
148− Value::Array(right_items)
111+ left_items.reserve(right_items.len());
112+ for rvalue in right_items {
113+ let lvalue = get_name(&rvalue)
114+ .and_then(|rname| left_items.iter().position(|v| get_name(v) == Some(rname)))
115+ .map(|lpos| left_items.remove(lpos));
116+ let mvalue = match lvalue {
117+ Some(lvalue) => merge_toml_values(lvalue, rvalue),
118+ None => rvalue,
119+ };
120+ left_items.push(mvalue);
149121 }
122+ Value::Array(left_items)
150123 }
151124 (Value::Table(mut left_map), Value::Table(right_map)) => {
152125 for (rname, rvalue) in right_map {
153126 match left_map.remove(&rname) {
154127 Some(lvalue) => {
155− let merged_value = merge_toml_values(lvalue, rvalue, merge_toplevel_arrays);
128+ let merged_value = merge_toml_values(lvalue, rvalue);
156129 left_map.insert(rname, merged_value);
157130 }
158131 None => {
@@ -170,22 +143,23 @@ pub fn merge_toml_values(
170143#[cfg(test)]
171144mod merge_toml_tests {
172145 use super::merge_toml_values;
173− use toml::Value;
174146
175147 #[test]
176− fn language_toml_map_merges() {
177− const USER: &str = r#"
148+ fn language_tomls() {
149+ use toml::Value;
150+
151+ const USER: &str = "
178152 [[language]]
179− name = "nix"
180− test = "bbb"
181− indent = { tab-width = 4, unit = " ", test = "aaa" }
182− "#;
153+ name = \"nix\"
154+ test = \"bbb\"
155+ indent = { tab-width = 4, unit = \" \", test = \"aaa\" }
156+ ";
183157
184158 let base: Value = toml::from_slice(include_bytes!("../../languages.toml"))
185159 .expect("Couldn't parse built-in languages config");
186160 let user: Value = toml::from_str(USER).unwrap();
187161
188− let merged = merge_toml_values(base, user, true);
162+ let merged = merge_toml_values(base, user);
189163 let languages = merged.get("language").unwrap().as_array().unwrap();
190164 let nix = languages
191165 .iter()
@@ -205,33 +179,4 @@ mod merge_toml_tests {
205179 // We didn't change comment-token so it should be same
206180 assert_eq!(nix.get("comment-token").unwrap().as_str().unwrap(), "#");
207181 }
208−
209− #[test]
210− fn language_toml_nested_array_merges() {
211− const USER: &str = r#"
212− [[language]]
213− name = "typescript"
214− language-server = { command = "deno", args = ["lsp"] }
215− "#;
216−
217− let base: Value = toml::from_slice(include_bytes!("../../languages.toml"))
218− .expect("Couldn't parse built-in languages config");
219− let user: Value = toml::from_str(USER).unwrap();
220−
221− let merged = merge_toml_values(base, user, true);
222− let languages = merged.get("language").unwrap().as_array().unwrap();
223− let ts = languages
224− .iter()
225− .find(|v| v.get("name").unwrap().as_str().unwrap() == "typescript")
226− .unwrap();
227− assert_eq!(
228− ts.get("language-server")
229− .unwrap()
230− .get("args")
231− .unwrap()
232− .as_array()
233− .unwrap(),
234− &vec![Value::String("lsp".into())]
235− )
236− }
237182}