Add script to build release documentation

The script builds a snapshot of the documentation, based on the state in the release branch.
Next, it rewrites all links to point to the versioned documentation for that release.
Finally, it creates an archive of all documentation files.

Closes #15686.

PiperOrigin-RevId: 460684222
Change-Id: Ic466e9e72cc862079f0551703fc2a16701888a2e
diff --git a/scripts/docs/get_workspace_status.sh b/scripts/docs/get_workspace_status.sh
new file mode 100755
index 0000000..9c8fbcb
--- /dev/null
+++ b/scripts/docs/get_workspace_status.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+#
+# Copyright 2022 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+RELEASE_NAME=$(source scripts/release/common.sh; get_full_release_name)
+
+if [[ -z "$RELEASE_NAME" ]]; then
+  echo BUILD_SCM_REVISION UNSAFE_"$(git rev-parse --abbrev-ref HEAD)"
+else
+  echo "BUILD_SCM_REVISION $RELEASE_NAME"
+fi