workflow_dispatch version input for sync search (#32207)

script/search/index-elasticsearch.js

@@ -137,12 +137,40 @@ async function main(opts, args) {
 async function indexAll(node, sourceDirectory, opts) {
   const client = new Client({ node })
 
-  const { version, language, verbose, notLanguage, indexPrefix } = opts
+  const { language, verbose, notLanguage, indexPrefix } = opts
+
+  let version
+  if ('version' in opts) {
+    version = opts.version
+    if (process.env.VERSION) {
+      console.warn(
+        `'version' specified as argument ('${version}') AND environment variable ('${process.env.VERSION}')`
+      )
+    }
+  } else {
+    if (process.env.VERSION && process.env.VERSION !== 'all') {
+      version = process.env.VERSION
+      if (!allVersionKeys.includes(version)) {
+        throw new Error(
+          `Environment variable 'VERSION' (${version}) is not recognized. Must be one of ${allVersionKeys}`
+        )
+      }
+    }
+  }
+  let versionKeys = allVersionKeys
+  // If it came from the `--version` argument parsing, it might be a string
+  // or an array of strings because it uses `--version [VERSION...]`.
+  if (version) {
+    if (Array.isArray(version)) {
+      versionKeys = version
+    } else {
+      versionKeys = [version]
+    }
+  }
 
   // This will throw if it can't ping
   await client.ping()
 
-  const versionKeys = version || allVersionKeys
   const languages =
     language || languageKeys.filter((lang) => !notLanguage || !notLanguage.includes(lang))
   if (verbose) {