add tree-sitter-git-config (helix-editor#1426)

* add tree-sitter-git-config

* add todo comment for improving filetype check

.gitmodules

@@ -198,3 +198,7 @@
 	path = helix-syntax/languages/tree-sitter-make
 	url = https://github.com/alemuller/tree-sitter-make
 	shallow = true
+[submodule "helix-syntax/languages/tree-sitter-git-config"]
+	path = helix-syntax/languages/tree-sitter-git-config
+	url = https://github.com/the-mikedavis/tree-sitter-git-config.git
+	shallow = true

book/src/generated/lang-support.md

@@ -12,6 +12,7 @@
 | elixir | ✓ |  |  | `elixir-ls` |
 | fish | ✓ | ✓ | ✓ |  |
 | git-commit | ✓ |  |  |  |
+| git-config | ✓ |  |  |  |
 | git-diff | ✓ |  |  |  |
 | git-rebase | ✓ |  |  |  |
 | glsl | ✓ |  | ✓ |  |

languages.toml

@@ -545,3 +545,13 @@ scope = "source.regex"
 injection-regex = "regex"
 file-types = ["regex"]
 roots = []
+
+[[language]]
+name = "git-config"
+scope = "source.gitconfig"
+roots = []
+# TODO: allow specifying file-types as a regex so we can read directory names (e.g. `.git/config`)
+file-types = [".gitmodules", ".gitconfig"]
+injection-regex = "git-config"
+comment-token = "#"
+indent = { tab-width = 4, unit = "\t" }

runtime/queries/git-config/highlights.scm

@@ -0,0 +1,27 @@
+((section_name) @keyword.directive
+ (#eq? @keyword.directive "include"))
+
+((section_header
+   (section_name) @keyword.directive
+   (subsection_name))
+ (#eq? @keyword.directive "includeIf"))
+
+(section_name) @markup.heading
+(variable (name) @variable.other.member)
+[(true) (false)] @constant.builtin.boolean
+(integer) @constant.numeric.integer
+
+((string) @string.special.path
+ (#match? @string.special.path "^(~|./|/)"))
+
+[(string) (subsection_name)] @string
+
+[
+  "["
+  "]"
+  "\""
+] @punctuation.bracket
+
+"=" @punctuation.delimiter
+
+(comment) @comment