Prevent indexing of old kedro docs using RTD-Enabled JavaScript script

docs/static/deindex-old-docs.js

@@ -0,0 +1,42 @@
+// Explanation from RTD on how this script works:
+// https://github.com/readthedocs/addons/pull/474#issuecomment-2615984387
+
+// Ensure the correct API version is set
+if (document.querySelector("meta[name='readthedocs-addons-api-version']") === null) {
+    const meta = document.createElement("meta");
+    meta.name = "readthedocs-addons-api-version";
+    meta.content = "1";
+    document.head.appendChild(meta);
+}
+
+// Function to handle RTD data and inject meta tags based on conditions
+function _handleReadTheDocsData(data) {
+    const projectSlug = data.projects.current.slug;
+    const versionSlug = data.versions.current.slug;
+
+    console.log("Project slug:", projectSlug, "| Version:", versionSlug);
+
+    // Ensure the version is updated after each release of kedro-datasets
+    if (
+        (projectSlug === "kedro-datasets" && versionSlug !== "kedro-datasets-6.0.0") ||
+        (projectSlug !== "kedro-datasets" && versionSlug !== "stable")
+    ) {
+        console.log("Non-indexable version detected, injecting meta tag");
+        const meta = document.createElement("meta");
+        meta.name = "robots";
+        meta.content = "noindex, nofollow";
+        document.head.appendChild(meta);
+    } else {
+        console.log("Indexable version detected, no meta tag added.");
+    }
+}
+
+// Check if the event has already been fired before this script runs
+if (window.ReadTheDocsEventData !== undefined) {
+    _handleReadTheDocsData(window.ReadTheDocsEventData.data());
+}
+
+// Subscribe to future dispatches of the event (e.g., SPA navigation)
+document.addEventListener("readthedocs-addons-data-ready", function (event) {
+    _handleReadTheDocsData(event.detail.data());
+});