feat: Add HEEx support (#268)

Author: jcs090218

.gitmodules

@@ -456,7 +456,7 @@
 	ignore = dirty
 [submodule "repos/hlsl"]
 	path = repos/hlsl
-	url = https://github.com/theHamsta/tree-sitter-hlsl  
+	url = https://github.com/theHamsta/tree-sitter-hlsl
 	branch = master
 	update = none
 	ignore = dirty
@@ -478,3 +478,9 @@
 	branch = master
 	update = none
 	ignore = dirty
+[submodule "repos/heex"]
+	path = repos/heex
+	url = https://github.com/phoenixframework/tree-sitter-heex
+	branch = main
+	update = none
+	ignore = dirty

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Changelog
 
 ## Unreleased
+- Add `HEEx` support
 
 ## 0.12.67 - 2023-10-11
 - Add `Astro` support

queries/heex/highlights.scm

@@ -0,0 +1,56 @@
+; HEEx delimiters
+[
+  "%>"
+  "--%>"
+  "-->"
+  "/>"
+  "<!"
+  "<!--"
+  "<"
+  "<%!--"
+  "<%"
+  "<%#"
+  "<%%="
+  "<%="
+  "</"
+  "</:"
+  "<:"
+  ">"
+  "{"
+  "}"
+] @tag.delimiter
+
+; HEEx operators are highlighted as such
+"=" @operator
+
+; HEEx inherits the DOCTYPE tag from HTML
+(doctype) @constant
+
+; HEEx comments are highlighted as such
+(comment) @comment @spell
+
+; HEEx text content is treated as markup
+(text) @text
+
+; Tree-sitter parser errors
+(ERROR) @error
+
+; HEEx tags and slots are highlighted as HTML
+[
+ (tag_name) 
+ (slot_name) 
+] @tag
+
+; HEEx attributes are highlighted as HTML attributes
+(attribute_name) @tag.attribute
+[
+  (attribute_value)
+  (quoted_attribute_value)
+] @string
+
+; HEEx components are highlighted as modules and function calls
+(component_name [
+  (module) @type
+  (function) @function
+  "." @punctuation.delimiter
+])

repos/heex

@@ -139,6 +139,7 @@ See `tree-sitter-langs-repos'."
                 (haskell-mode           . haskell)
                 (hcl-mode               . hcl)
                 (terraform-mode         . hcl)
+                (heex-mode              . heex)
                 (hlsl-mode              . hlsl)
                 (html-mode              . html)
                 (markdown-mode          . markdown)