check version before release

check_version.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+#
+# check_version.sh -- verify the library version is consistent and released.
+#
+# Read-only: confirms the version matches in both manifests and that a matching
+# git tag (vX.Y.Z) exists. Run it before tagging a release. Non-zero exit if the
+# versions disagree or the tag is missing.
+#
+# SPDX-License-Identifier: MIT
+
+set -u
+cd "$(dirname "$0")" || exit 2
+
+json=$(sed -nE 's/.*"version"[[:space:]]*:[[:space:]]*"([^"]+)".*/\1/p' library.json | head -1)
+prop=$(sed -nE 's/^version=([^[:space:]]+).*/\1/p' library.properties | tr -d '\r' | head -1)
+
+echo "library.json       : ${json:-<none>}"
+echo "library.properties : ${prop:-<none>}"
+
+fail=0
+
+if [ -n "$json" ] && [ "$json" = "$prop" ]; then
+    echo "ok   versions match ($json)"
+else
+    echo "FAIL versions differ (json=$json properties=$prop)"; fail=1
+fi
+
+if git rev-parse -q --verify "refs/tags/v$json" >/dev/null 2>&1; then
+    echo "ok   git tag v$json exists"
+else
+    echo "FAIL no git tag v$json -- create one to release: git tag v$json"; fail=1
+fi
+
+exit "$fail"