From bc9f4dd47316e4314075cceba66dc96d983786db Mon Sep 17 00:00:00 2001
From: DatanoiseTV <6614616+DatanoiseTV@users.noreply.github.com>
Date: Thu, 11 Jun 2026 15:46:18 +0200
Subject: [PATCH] ci: escape regex metacharacters in baseline links for
 .lycheeignore
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Baseline links are appended verbatim to .lycheeignore, whose lines
lychee parses as regexes. A baseline URL containing regex
metacharacters aborts the whole check with a parse error before any
link is verified — currently triggered by the provisioning QR-code URL
(`qrcode.html?data={%22ver%22...}`) in content/blog/2026/05/
simple-provisioning, which fails the blog_0-9a-f bucket for every PR.

Escape the metacharacters so baseline URLs match literally.
---
 .github/workflows/pr-check-links-worker.yml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pr-check-links-worker.yml b/.github/workflows/pr-check-links-worker.yml
index e91e92e73..7fe22dcb5 100644
--- a/.github/workflows/pr-check-links-worker.yml
+++ b/.github/workflows/pr-check-links-worker.yml
@@ -67,7 +67,10 @@ jobs:
         run: git switch -- "$HEAD_REF"
 
       - name: Append links-baseline.txt to .lycheeignore
-        run: cat links-baseline.txt >> .lycheeignore
+        # .lycheeignore lines are parsed as regexes; escape metacharacters so
+        # baseline URLs are treated literally (e.g. `?data={...}` in a URL is
+        # an invalid regex quantifier and aborts lychee with a parse error).
+        run: sed 's/[][\.^$*+?(){}|]/\\&/g' links-baseline.txt >> .lycheeignore
 
       - name: Dump names of files altered in PR and append hash sign to find links with anchors
         run: |