test-build: scaffold script + self-check

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/.extras/test-logic.sh b/.extras/test-logic.sh
new file mode 100644
index 0000000..20041a9
--- /dev/null
+++ b/.extras/test-logic.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+#
+# Logic self-check for .extras/test-build. Covers the pure, host-side parts:
+# dependency resolution, override application, unknown-dep -> UNMET, cache
+# decisions, and BLOCKED-BY-DEP propagation. No docker.
+#
+# Run: bash .extras/test-logic.sh
+#
+set -uo pipefail
+
+SCRIPT="$(dirname "$0")/test-build"
+T=$(mktemp -d)
+BASE_DB=$(mktemp -d); mkdir -p "$BASE_DB"
+
+cleanup() { rm -rf "$T" "$BASE_DB"; }
+trap cleanup EXIT
+
+# Source the script without running main(). Sourcing re-runs the CONFIG block,
+# so set test vars AFTER the source.
+LIB=$(mktemp)
+sed '/^main "\$@"$/d' "$SCRIPT" > "$LIB"
+# shellcheck disable=SC1090
+source "$LIB" 2>/dev/null
+rm -f "$LIB"
+
+pass=0; fail=0
+ok()  { echo "  ok: $1"; ((pass++)); return 0; }
+bad() { echo "  FAIL: $1"; ((fail++)); return 0; }
+
+# Placeholder assertion so this file runs before any logic exists.
+ok "script sources without executing main"
+
+echo
+echo "$pass passed, $fail failed"
+[[ $fail -eq 0 ]] || exit 1
+echo "ALL LOGIC CHECKS PASS"