epocsquadron/add tree sitter twig (#1602)

* Add tree-sitter-twig grammer and highlights

The gammar itself is quite basic, but is much better than nothing
for working with real files consisting mostly of html.

* Docgen for newly added grammar

.gitmodules

@@ -218,3 +218,7 @@
 	path = helix-syntax/languages/tree-sitter-iex
 	url = https://github.com/elixir-lang/tree-sitter-iex
 	shallow = true
+[submodule "helix-syntax/languages/tree-sitter-twig"]
+	path = helix-syntax/languages/tree-sitter-twig
+	url = https://github.com/eirabben/tree-sitter-twig.git
+	shallow = true

book/src/generated/lang-support.md

@@ -54,6 +54,7 @@
 | toml | ✓ |  |  |  |
 | tsq | ✓ |  |  |  |
 | tsx | ✓ |  |  | `typescript-language-server` |
+| twig | ✓ |  |  |  |
 | typescript | ✓ |  | ✓ | `typescript-language-server` |
 | vue | ✓ |  |  |  |
 | wgsl | ✓ |  |  |  |

helix-syntax/languages/tree-sitter-twig

@@ -0,0 +1 @@
+Subproject commit b7444181fb38e603e25ea8fcdac55f9492e49c27

languages.toml

@@ -231,6 +231,15 @@ roots = []
 
 indent = { tab-width = 4, unit = "    " }
 
+[[language]]
+name = "twig"
+scope = "source.twig"
+injection-regex = "twig"
+file-types = ["twig"]
+roots = []
+
+indent = { tab-width = 2, unit = "  " }
+
 [[language]]
 name = "latex"
 scope = "source.tex"

runtime/queries/twig/highlights.scm

@@ -0,0 +1,16 @@
+(comment_directive) @comment
+
+[
+  "{%"
+  "{%-"
+  "{%~"
+  "%}"
+  "-%}"
+  "~%}"
+  "{{"
+  "{{-"
+  "{{~"
+  "}}"
+  "-}}"
+  "~}}"
+] @keyword

runtime/queries/twig/injections.scm

@@ -0,0 +1,3 @@
+((content) @injection.content
+ (#set! injection.language "html")
+ (#set! injection.combined))