add highlighting rules

Author: ngalaiko

bindings/rust/lib.rs

@@ -6,7 +6,7 @@
 //! ```
 //! let code = "";
 //! let mut parser = tree_sitter::Parser::new();
-//! parser.set_language(tree_sitter_go_template::language()).expect("Error loading YOUR_LANGUAGE_NAME grammar");
+//! parser.set_language(tree_sitter_go_template::language()).expect("Error loading go-template grammar");
 //! let tree = parser.parse(code, None).unwrap();
 //! ```
 //!

package.json

@@ -19,6 +19,17 @@
   "scripts": {
     "build": "tree-sitter generate && node-gyp build",
     "test": "tree-sitter test",
-    "parse": "tree-sitter parse"
-  }
+    "parse": "tree-sitter parse",
+    "highlight": "tree-sitter highlight"
+  },
+  "tree-sitter": [
+    {
+      "scope": "source.gotexttmpl",
+      "file-types": [
+        "gotexttmpl",
+        "gohtmltmpl",
+        "gotmpl"
+      ]
+    }
+  ]
 }

queries/highlights.scm

@@ -0,0 +1,75 @@
+; Identifiers
+
+[
+    (field)
+    (field_identifier)
+] @property
+
+(variable) @variable
+
+; Function calls
+
+(function_call
+  function: (identifier) @function)
+
+(method_call
+  method: (selector_expression
+    field: (field_identifier) @function))
+
+; Operators
+
+"|" @operator
+":=" @operator
+
+; Builtin functions
+
+((identifier) @function.builtin
+ (#match? @function.builtin "^(and|call|html|index|slice|js|len|not|or|print|printf|println|urlquery|eq|ne|lt|ge|gt|ge)$"))
+
+; Delimiters
+
+"." @punctuation.delimiter
+"," @punctuation.delimiter
+
+"{{" @punctuation.bracket
+"}}" @punctuation.bracket
+"{{-" @punctuation.bracket
+"-}}" @punctuation.bracket
+")" @punctuation.bracket
+"(" @punctuation.bracket
+
+; Keywords
+
+"else" @keyword
+"if" @keyword
+"range" @keyword
+"with" @keyword
+"end" @keyword
+"template" @keyword
+"define" @keyword
+"block" @keyword
+
+; Literals
+
+[
+  (interpreted_string_literal)
+  (raw_string_literal)
+  (rune_literal)
+] @string
+
+(escape_sequence) @string.special
+
+[
+  (int_literal)
+  (float_literal)
+  (imaginary_literal)
+] @number
+
+[
+  (true)
+  (false)
+  (nil)
+] @constant.builtin
+
+(comment) @comment
+(ERROR) @error