CI: Add a test that parses all rawhide pyproject specs with rpm --specfile

Downloads rpm-specs-latest.tar.xz, finds all specs using %pyproject
macros, and runs rpm --specfile on each to verify they parse without
errors. Only runs on rawhide as the spec files are rawhide only.

Assisted-By: Claude Opus 4.6

plan.fmf

@@ -115,6 +115,13 @@ discover:
     - name: isort_c10s
       path: /tests
       test: ID=centos VERSION_ID=10 ./mocktest.sh python-isort
+  - name: rawhide_specs
+    how: shell
+    when: distro == fedora-rawhide
+    tests:
+    - name: rpm_specfile_check
+      path: /tests
+      test: ./test-rpm-specs-parse.sh
 prepare:
   - name: Install dependencies
     how: install

tests/test-rpm-specs-parse.sh

@@ -0,0 +1,71 @@
+#!/usr/bin/bash -eu
+# Download all Fedora rawhide spec files and verify that every spec using
+# %%pyproject macros parses successfully with rpm --specfile.
+
+workdir=$(mktemp -d)
+trap 'rm -rf $workdir' EXIT
+
+curl -L https://pkgs.fedoraproject.org/repo/rpm-specs-latest.tar.xz | tar -xJf - -C "$workdir"
+
+specs=$(grep -rl '%pyproject' "$workdir"/rpm-specs/ --include='*.spec' || true)
+
+if [ -z "$specs" ]; then
+  echo "ERROR: No specs with %%pyproject found" >&2
+  exit 1
+fi
+
+nspecs=$(echo "$specs" | wc -l)
+echo "Found $nspecs specfiles with %pyproject macros"
+
+# Known-broken spec filenames that should not cause test failure
+allowlist=(
+  # "broken-package.spec"
+)
+
+is_allowed() {
+  local base
+  base=$(basename "$1")
+  for a in "${allowlist[@]}"; do
+    if [ "$base" = "$a" ]; then
+      return 0
+    fi
+  done
+  return 1
+}
+
+total=0
+failed=0
+failed_specs=()
+last_pct=-1
+
+for spec in $specs; do
+  total=$((total + 1))
+  pct=$((total * 100 / nspecs))
+  if [ $pct -ne $last_pct ]; then
+    printf '\r%d%% done (%d/%d)' "$pct" "$total" "$nspecs" >&2
+    last_pct=$pct
+  fi
+  if ! output=$(LANG=C.utf-8 rpm --specfile "$spec" 2>&1); then
+    if is_allowed "$spec"; then
+      printf '\r\033[K' >&2
+      echo "SKIP (allowlisted): $spec"
+    else
+      printf '\r\033[K' >&2
+      echo "FAIL: $spec"
+      echo "$output" | head -20
+      echo "---"
+      failed=$((failed + 1))
+      failed_specs+=("$spec")
+    fi
+  fi
+done
+
+printf '\r\033[K' >&2
+echo "Tested $total specs, $failed failures"
+
+if [ $failed -gt 0 ]; then
+  echo ""
+  echo "Failed specs:"
+  printf '  %s\n' "${failed_specs[@]}"
+  exit 1
+fi