feat: Add support for START, END, and REGEX line markers

Author: elifarley

Makefile

@@ -256,10 +256,20 @@ module.exports = grammar({
 */
     // <specifying-locations-in-code>
     /**
-    lineMarker: Points to specific line via either its trimmed contents or its line number.
+    lineMarker: Points to specific line via:
+    - its trimmed contents
+    - its line number
+    - a string that matches from start of line (PREFIX)
+    - a string that matches from end of line (SUFFIX)
+    - a regular expression pattern (REGEX)
     *NEVER* use an ambiguous line (one that appears 2 or more times) as reference. Instead, prefer a different, nearby line.
     */
-    lineMarker: $ => seq('LINE', field('lineMarker', choice($.string, $.number)), optional($.offset_clause)),
+    lineMarker: $ => seq('LINE', choice(
+      field('lineMarker', choice($.string, $.number)),
+      seq('REGEX', field('regexMarker', $.string)),
+      seq('PREFIX', field('prefixMarker', $.string)),
+      seq('SUFFIX', field('suffixMarker', $.string))
+    ), optional($.offset_clause)),
     /**
     identifierMarker: Points to an identifier (variable, function or class).
     Use `OFFSET <n>` to pinpoint which (if there are 2 or more with same name)

grammar.js

@@ -1,3 +1,88 @@
+==================
+UPDATE with line markers
+==================
+
+UPDATE FILE "/app/main.py"
+INSERT AFTER LINE 5
+WITH CONTENT "...";
+
+UPDATE FILE "/app/main.py"
+INSERT AFTER LINE REGEX ".."
+WITH CONTENT "...";
+
+UPDATE FILE "/app/main.py"
+INSERT AFTER LINE PREFIX ".."
+WITH CONTENT "...";
+
+UPDATE FILE "/app/main.py"
+INSERT AFTER LINE SUFFIX ".."
+WITH CONTENT "...";
+
+
+---
+
+(source_file
+  (update_command
+    (singlefile_clause
+      (string
+        (single_quoted_string)))
+    (insert_clause
+      (relpos_bai
+        (relpos_beforeafter
+          (marker
+            (lineMarker
+              (number))))))
+    (content_clause
+      (string
+        (single_quoted_string))))
+  (command_separator)
+  (update_command
+    (singlefile_clause
+      (string
+        (single_quoted_string)))
+    (insert_clause
+      (relpos_bai
+        (relpos_beforeafter
+          (marker
+            (lineMarker
+              (string
+                (single_quoted_string)))))))
+    (content_clause
+      (string
+        (single_quoted_string))))
+  (command_separator)
+  (update_command
+    (singlefile_clause
+      (string
+        (single_quoted_string)))
+    (insert_clause
+      (relpos_bai
+        (relpos_beforeafter
+          (marker
+            (lineMarker
+              (string
+                (single_quoted_string)))))))
+    (content_clause
+      (string
+        (single_quoted_string))))
+  (command_separator)
+  (update_command
+    (singlefile_clause
+      (string
+        (single_quoted_string)))
+    (insert_clause
+      (relpos_bai
+        (relpos_beforeafter
+          (marker
+            (lineMarker
+              (string
+                (single_quoted_string)))))))
+    (content_clause
+      (string
+        (single_quoted_string))))
+  (command_separator))
+
+
 ==================
 UPDATE PROJECT
 ==================