feat(lang): add nushell language support (#2225)

Co-authored-by: Michael Davis <mcarsondavis@gmail.com>

4 files changed, 74 insertions, 0 deletions

diff --git a/runtime/queries/nu/folds.scm b/runtime/queries/nu/folds.scm
new file mode 100644
index 00000000..f6b5acb1
--- /dev/null
+++ b/runtime/queries/nu/folds.scm
@@ -0,0 +1,4 @@
+[
+  (function_definition)
+  (block)
+] @fold
diff --git a/runtime/queries/nu/highlights.scm b/runtime/queries/nu/highlights.scm
new file mode 100644
index 00000000..b643a63a
--- /dev/null
+++ b/runtime/queries/nu/highlights.scm
@@ -0,0 +1,55 @@
+(string) @string
+(type) @type
+(value_path) @variable
+(comment) @comment
+
+(number_literal) @constant.numeric
+(range from: (number_literal) @constant.numeric)
+(range to: (number_literal) @constant.numeric)
+
+(command cmd_name: (identifier) @function)
+(function_definition func_name: (identifier) @function)
+
+[
+    (variable_declaration name: (identifier))
+    (parameter (identifier))
+    (flag (flag_name))
+    (flag (flag_shorthand_name))
+    (record_entry entry_name: (identifier))
+    (block_args block_param: (identifier))
+] @variable.other.member
+; (parameter (identifier) @variable.parameter) ; -- alternative highlighting group?
+
+(cmd_invocation) @embedded
+
+
+((identifier) @constant
+ (#match? @constant "^[A-Z][A-Z\\d_]*$"))
+
+[
+ "if"
+ "else"
+ "let"
+ "def"
+ "export"
+] @keyword
+
+[
+  ; "/" Not making / an operator may lead to better highlighting?
+  "$"
+  "|"
+  "+"
+  "-"
+  "*"
+  "="
+  "!="
+  "&&"
+  "||"
+  "=="
+  ">"
+] @operator
+
+["."
+ "," 
+ ";" 
+] @punctuation.delimiter
diff --git a/runtime/queries/nu/injections.scm b/runtime/queries/nu/injections.scm
new file mode 100644
index 00000000..321c90ad
--- /dev/null
+++ b/runtime/queries/nu/injections.scm
@@ -0,0 +1,2 @@
+((comment) @injection.content
+ (#set! injection.language "comment"))
diff --git a/runtime/queries/nu/locals.scm b/runtime/queries/nu/locals.scm
new file mode 100644
index 00000000..2a341f80
--- /dev/null
+++ b/runtime/queries/nu/locals.scm
@@ -0,0 +1,13 @@
+; Scopes
+(function_definition) @scope
+
+; Definitions
+(variable_declaration 
+  name: (identifier) @definition.var)
+
+(function_definition
+  func_name: (identifier) @definition.function)
+
+; References
+(value_path) @reference
+(word) @reference