Lua support (#665)

* added submodule

* small changes

* updated some stuff

* remove

* shallow clone

* correct indent

* shallow

* ok

* highlights

* proper captures

.gitmodules

@@ -102,6 +102,10 @@
 	path = helix-syntax/languages/tree-sitter-protobuf
 	url = https://github.com/yusdacra/tree-sitter-protobuf.git
 	shallow = true
+[submodule "helix-syntax/languages/tree-sitter-lua"]
+	path = helix-syntax/languages/tree-sitter-lua
+	url = https://github.com/nvim-treesitter/tree-sitter-lua
+	shallow = true
 [submodule "helix-syntax/languages/tree-sitter-yaml"]
 	path = helix-syntax/languages/tree-sitter-yaml
 	url = https://github.com/ikatyang/tree-sitter-yaml

languages.toml

@@ -224,6 +224,14 @@ roots = []
 comment-token = ";"
 indent = { tab-width = 4, unit = "    " }
 
+[[language]]
+name = "lua"
+scope = "source.lua"
+file-types = ["lua"]
+roots = []
+comment-token = "--"
+indent = { tab-width = 2, unit = "  " }
+
 [[language]]
 name = "yaml"
 scope = "source.yaml"

runtime/queries/lua/highlights.scm

@@ -0,0 +1,166 @@
+;;; Highlighting for lua
+
+;;; Builtins
+(self) @variable.builtin
+
+;; Keywords
+
+(if_statement
+[
+  "if"
+  "then"
+  "end"
+] @keyword.control.conditional)
+
+[
+  "else"
+  "elseif"
+  "then"
+] @keyword.control.conditional
+
+(for_statement
+[
+  "for"
+  "do"
+  "end"
+] @keyword.control.loop)
+
+(for_in_statement
+[
+  "for"
+  "do"
+  "end"
+] @keyword.control.loop)
+
+(while_statement
+[
+  "while"
+  "do"
+  "end"
+] @keyword.control.loop)
+
+(repeat_statement
+[
+  "repeat"
+  "until"
+] @keyword.control.loop)
+
+(do_statement
+[
+  "do"
+  "end"
+] @keyword)
+
+[
+ "in"
+ "local"
+ (break_statement)
+ "goto"
+ "return"
+] @keyword
+
+;; Operators
+
+[
+ "not"
+ "and"
+ "or"
+] @keyword.operator
+
+[
+"="
+"~="
+"=="
+"<="
+">="
+"<"
+">"
+"+"
+"-"
+"%"
+"/"
+"//"
+"*"
+"^"
+"&"
+"~"
+"|"
+">>"
+"<<"
+".."
+"#"
+ ] @operator
+
+;; Punctuation
+["," "." ":" ";"] @punctuation.delimiter
+
+;; Brackets
+[
+ "("
+ ")"
+ "["
+ "]"
+ "{"
+ "}"
+] @punctuation.bracket
+
+; ;; Constants
+[
+(false)
+(true)
+] @boolean
+(nil) @constant.builtin
+(spread) @constant ;; "..."
+((identifier) @constant
+ (#match? @constant "^[A-Z][A-Z_0-9]*$"))
+
+;; Parameters
+(parameters
+  (identifier) @parameter)
+
+; ;; Functions
+(function [(function_name) (identifier)] @function)
+(function ["function" "end"] @keyword.function)
+
+(function
+  (function_name
+   (function_name_field
+    (property_identifier) @function .)))
+
+(local_function (identifier) @function)
+(local_function ["function" "end"] @keyword.function)
+
+(variable_declaration
+ (variable_declarator (identifier) @function) (function_definition))
+(local_variable_declaration
+ (variable_declarator (identifier) @function) (function_definition))
+
+(function_definition ["function" "end"] @keyword.function)
+
+(function_call
+  [
+   ((identifier) @variable (method) @method)
+   ((_) (method) @method)
+   (identifier) @function
+   (field_expression (property_identifier) @function)
+  ]
+  . (arguments))
+
+;; Nodes
+(table ["{" "}"] @constructor)
+(comment) @comment
+(string) @string
+(number) @number
+(label_statement) @label
+; A bit of a tricky one, this will only match field names
+(field . (identifier) @property (_))
+(shebang) @comment
+
+;; Property
+(property_identifier) @property
+
+;; Variable
+(identifier) @variable
+
+;; Error
+(ERROR) @error

runtime/queries/lua/indents.toml

@@ -0,0 +1,24 @@
+indent = [
+  "function_definition",
+  "variable_declaration",
+  "local_variable_declaration",
+  "field",
+  "local_function",
+  "function",
+  "if_statement",
+  "for_statement",
+  "for_in_statement",
+  "repeat_statement",
+  "return_statement",
+  "while_statement",
+  "table",
+  "arguments",
+  "do_statement",
+]
+
+oudent = [
+  "end",
+  "until",
+  "}",
+  ")",
+]