From f51d504a669e5ad15617ca4104d2d4b22f9853d7 Mon Sep 17 00:00:00 2001
From: Emir Beganovic <beganovic.emir@gmail.com>
Date: Sun, 4 Oct 2026 01:10:54 +0200
Subject: [PATCH] Flag a recipe change that will not ship without a version
 bump

When edge already holds the version, a PKGBUILD whose recipe changed
(comments and blank lines aside) builds nothing and publishes nothing.
Arch bumps pkgrel only when the built package changes, which is the
reviewer's call, so this is a warning annotation on the PKGBUILD and a
job summary line, not a failure. Comment-only and hook-only changes
stay silent.
---
 .github/workflows/build-pr.yml | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/.github/workflows/build-pr.yml b/.github/workflows/build-pr.yml
index 5b33ec8..542d3d6 100644
--- a/.github/workflows/build-pr.yml
+++ b/.github/workflows/build-pr.yml
@@ -226,6 +226,18 @@ jobs:
           if [[ -n "$plan" && -z "$(sed -E 's/.*would build: *//' <<<"$plan" | tr -d '[:space:]')" ]]; then
             echo "==> ${{ matrix.package }} (${{ matrix.arch }}): edge already holds this version, nothing to build"
             echo "built=false" >> "$GITHUB_OUTPUT"
+            # Arch bumps pkgrel only when the built package changes, which is
+            # the reviewer's call. When the recipe itself changed (comments and
+            # blank lines aside), flag it on the PKGBUILD without failing: the
+            # change ships only once pkgver or pkgrel moves. HEAD is the base
+            # branch; the PR's package directories are overlaid on it.
+            recipe="pkgbuilds/${{ matrix.package }}/PKGBUILD"
+            recipe_lines() { grep -vE '^[[:space:]]*(#|$)' || true; }
+            if ! cmp -s <(git show "HEAD:$recipe" 2>/dev/null | recipe_lines) <(recipe_lines < "$recipe"); then
+              note="PKGBUILD changed, but edge already holds this version of ${{ matrix.package }}, so the change will not ship until pkgver or pkgrel changes. Bump pkgrel if it affects the built package."
+              echo "::warning file=$recipe,title=Change will not ship::$note"
+              echo "$note" >> "$GITHUB_STEP_SUMMARY"
+            fi
             exit 0
           fi
           bin/build --mirror edge --arch "${{ matrix.arch }}" --package "${{ matrix.package }}"