fix(installer): avoid pipefail marker race

tools/verify-greenfield-execution-coverage.sh

@@ -56,7 +56,11 @@ case "$mode" in
       || { echo "[fixture-suite] invalid $singular marker name: $name" >&2; exit 2; }
     [[ -d "$run_dir" ]] \
       || { echo "[fixture-suite] $dimension state was not initialized: $run_id" >&2; exit 1; }
-    expected_names | grep -Fxq -- "$name" \
+    if ! expected_snapshot="$(expected_names)"; then
+      echo "[fixture-suite] failed to read expected $dimension" >&2
+      exit 1
+    fi
+    grep -Fxq -- "$name" <<<"$expected_snapshot" \
       || { echo "[fixture-suite] $singular is not in the expected set: $name" >&2; exit 1; }
     : > "$run_dir/$name.ran"
     ;;

tools/verify-greenfield-execution-coverage.test.sh

@@ -2,7 +2,7 @@
 set -euo pipefail
 
 ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
-SUBJECT="$ROOT/tools/verify-greenfield-execution-coverage.sh"
+SUBJECT="${GREENFIELD_COVERAGE_SUBJECT:-$ROOT/tools/verify-greenfield-execution-coverage.sh}"
 GATE="${GREENFIELD_COVERAGE_GATE:-$ROOT/tools/verify-greenfield-execution-coverage-gate.sh}"
 WORKFLOW="$ROOT/.woodpecker/greenfield-install.yml"
 INSTALLER="${GREENFIELD_E2E_INSTALLER:-$ROOT/tools/e2e-install-test.sh}"
@@ -66,6 +66,15 @@ done
 complete_output="$(bash "$SUBJECT" check cases "$manifest" "$state_root" "$run_id")"
 grep -qF '[fixture-suite] cases_defined=3 cases_executed=3' <<<"$complete_output"
 
+# A successful early match must consume the full producer and remain green under pipefail.
+large_manifest="$TMP/large-expected.tsv"
+awk 'BEGIN {
+  print "a-target\texit\t1"
+  for (i = 0; i < 20000; i++) printf "z-case-%05d\texit\t1\n", i
+}' > "$large_manifest"
+bash "$SUBJECT" init cases "$large_manifest" "$state_root" large-set
+bash "$SUBJECT" mark cases "$large_manifest" "$state_root" large-set a-target
+
 # The production manifest, including comments, initializes and checks.
 production_manifest="$ROOT/tools/fixtures/greenfield-expected-red.tsv"
 production_arms="$ROOT/tools/fixtures/greenfield-expected-arms.txt"