Add query-check xtask

xtask/Cargo.toml

@@ -8,4 +8,5 @@ edition = "2021"
 [dependencies]
 helix-term = { version = "0.6", path = "../helix-term" }
 helix-core = { version = "0.6", path = "../helix-core" }
+helix-loader = { version = "0.6", path = "../helix-loader" }
 toml = "0.5"

xtask/src/main.rs

@@ -217,6 +217,41 @@ pub mod tasks {
         Ok(())
     }
 
+    pub fn query_check() -> Result<(), String> {
+        use crate::helpers::lang_config;
+        use helix_core::{syntax::read_query, tree_sitter::Query};
+        use helix_loader::grammar::get_language;
+
+        let query_files = [
+            "highlights.scm",
+            "locals.scm",
+            "injections.scm",
+            "textobjects.scm",
+            "indents.scm",
+        ];
+
+        for language in lang_config().language {
+            let language_name = language.language_id.to_ascii_lowercase();
+            let grammar_name = language.grammar.unwrap_or(language.language_id);
+            for query_file in query_files {
+                let language = get_language(&grammar_name);
+                let query_text = read_query(&language_name, query_file);
+                if !query_text.is_empty() && language.is_ok() {
+                    if let Err(reason) = Query::new(language.unwrap(), &query_text) {
+                        return Err(format!(
+                            "Failed to parse {} queries for {}: {}",
+                            query_file, language_name, reason
+                        ));
+                    }
+                }
+            }
+        }
+
+        println!("Query check succeeded");
+
+        Ok(())
+    }
+
     pub fn print_help() {
         println!(
             "
@@ -224,6 +259,7 @@ Usage: Run with `cargo xtask <task>`, eg. `cargo xtask docgen`.
 
     Tasks:
         docgen: Generate files to be included in the mdbook output.
+        query-check: Check that tree-sitter queries are valid.
 "
         );
     }
@@ -235,6 +271,7 @@ fn main() -> Result<(), DynError> {
         None => tasks::print_help(),
         Some(t) => match t.as_str() {
             "docgen" => tasks::docgen()?,
+            "query-check" => tasks::query_check()?,
             invalid => return Err(format!("Invalid task name: {}", invalid).into()),
         },
     };