From c4cf49f1d20ec5ce0c71d91eb15e74a0f99beb6b Mon Sep 17 00:00:00 2001
From: Kjell Tore Guttormsen <hello@fromaitochitta.com>
Date: Mon, 4 May 2026 20:31:23 +0200
Subject: [PATCH] feat(tally): parse --regex/-r flag and add compileRegex
 helper

Step 1 of plan.md (Spor B B3 pipeline run). Adds the new --regex / -r
flag to parseArgs and a compileRegex(pattern) helper. The flag is
parsed but main() does not yet branch on it (wired in step 2). All
10 baseline tests remain green.

[skip-docs]
---
 plugins/ultraplan-local/examples/02-real-cli/tally.mjs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/plugins/ultraplan-local/examples/02-real-cli/tally.mjs b/plugins/ultraplan-local/examples/02-real-cli/tally.mjs
index 0f9d8da..f63719a 100755
--- a/plugins/ultraplan-local/examples/02-real-cli/tally.mjs
+++ b/plugins/ultraplan-local/examples/02-real-cli/tally.mjs
@@ -21,11 +21,12 @@ function fail(msg, code = 2) {
 
 function parseArgs(argv) {
   const positional = [];
-  const flags = { json: false, ignoreCase: false, lines: false };
+  const flags = { json: false, ignoreCase: false, lines: false, regex: false };
   for (const a of argv) {
     if (a === '--json') flags.json = true;
     else if (a === '-i' || a === '--ignore-case') flags.ignoreCase = true;
     else if (a === '--lines') flags.lines = true;
+    else if (a === '--regex' || a === '-r') flags.regex = true;
     else if (a === '-h' || a === '--help') { process.stdout.write(HELP); process.exit(0); }
     else if (a.startsWith('-')) fail(`unknown flag: ${a}`);
     else positional.push(a);
@@ -34,6 +35,11 @@ function parseArgs(argv) {
   return { pattern: positional[0], file: positional[1], flags };
 }
 
+function compileRegex(pattern) {
+  try { return new RegExp(pattern, 'g'); }
+  catch (e) { fail(`invalid regex: ${e.message}`); }
+}
+
 function countOccurrences(text, pattern, ignoreCase) {
   if (pattern.length === 0) return 0;
   const haystack = ignoreCase ? text.toLowerCase() : text;