fix highlight

Makefile

@@ -3,5 +3,9 @@
 test: build
 	tree-sitter test
 
+highlight:
+	tree-sitter highlight -t test/highlight/*.d2
+
 build:
 	tree-sitter generate
+

examples/all.d2

@@ -1,7 +1,2 @@
-a <- b -- b
+a.shape: oval
-
+b
-foo: Hello world {
-  shape: oval
-}
-
-hello world- -- foo

package.json

@@ -4,5 +4,14 @@
   "description": "",
   "main": "grammar.js",
   "author": "",
-  "license": "ISC"
+  "license": "ISC",
+  "tree-sitter": [
+    {
+      "scope": "source.d2",
+      "file-types": [
+        "d2"
+      ],
+      "injection-regex": "^d2$"
+    }
+  ]
 }

queries/highlights.scm

@@ -0,0 +1,29 @@
+;-------------------------------------------------------------------------------
+
+(identifier) @variable
+(attr_key) @keyword
+
+;-------------------------------------------------------------------------------
+
+(string) @string
+(label) @string
+(attr_value) @string
+
+;-------------------------------------------------------------------------------
+
+(arrow) @operator
+
+[
+  (dot)
+  ":"
+  ";"
+] @punctuation.delimiter
+
+[
+  "{"
+  "}"
+] @punctuation.bracket
+
+;-------------------------------------------------------------------------------
+
+(ERROR) @error

test/highlight/shape.d2

@@ -0,0 +1,20 @@
+foo.baz.biz
+# <- variable
+#  ^ delimiter
+#   ^ variable
+#      ^ delimiter
+#       ^ variable
+
+foo: Foo Bar
+# <- variable
+#  ^ delimiter
+#    ^ string
+
+foo: Foo Bar {
+  # <- variable
+  #  ^ label
+
+  bar.baz
+  # <- variable
+  #   ^ variable
+}