kibana es add --use-cached cli flag (#119149)

packages/kbn-es/src/artifact.js

@@ -194,11 +194,23 @@ exports.Artifact = class Artifact {
    * @param {string} dest
    * @return {Promise<void>}
    */
-  async download(dest) {
+  async download(dest, { useCached = false }) {
     await retry(this._log, async () => {
       const cacheMeta = cache.readMeta(dest);
       const tmpPath = `${dest}.tmp`;
 
+      if (useCached) {
+        if (cacheMeta.exists) {
+          this._log.info(
+            'use-cached passed, forcing to use existing snapshot',
+            chalk.bold(cacheMeta.ts)
+          );
+          return;
+        } else {
+          this._log.info('use-cached passed but no cached snapshot found. Continuing to download');
+        }
+      }
+
       const artifactResp = await this._download(tmpPath, cacheMeta.etag, cacheMeta.ts);
       if (artifactResp.cached) {
         return;

packages/kbn-es/src/cli_commands/snapshot.js

@@ -29,6 +29,7 @@ exports.help = (defaults = {}) => {
       -E                Additional key=value settings to pass to Elasticsearch
       --download-only   Download the snapshot but don't actually start it
       --ssl             Sets up SSL on Elasticsearch
+      --use-cached      Skips cache verification and use cached ES snapshot.
 
     Example:
 
@@ -51,11 +52,12 @@ exports.run = async (defaults = {}) => {
       installPath: 'install-path',
       dataArchive: 'data-archive',
       esArgs: 'E',
+      useCached: 'use-cached',
     },
 
     string: ['version'],
 
-    boolean: ['download-only'],
+    boolean: ['download-only', 'use-cached'],
 
     default: defaults,
   });

packages/kbn-es/src/install/snapshot.js

@@ -29,6 +29,7 @@ exports.downloadSnapshot = async function installSnapshot({
   basePath = BASE_PATH,
   installPath = path.resolve(basePath, version),
   log = defaultLog,
+  useCached = false,
 }) {
   log.info('version: %s', chalk.bold(version));
   log.info('install path: %s', chalk.bold(installPath));
@@ -36,7 +37,7 @@ exports.downloadSnapshot = async function installSnapshot({
 
   const artifact = await Artifact.getSnapshot(license, version, log);
   const dest = path.resolve(basePath, 'cache', artifact.getFilename());
-  await artifact.download(dest);
+  await artifact.download(dest, { useCached });
 
   return {
     downloadPath: dest,
@@ -62,6 +63,7 @@ exports.installSnapshot = async function installSnapshot({
   installPath = path.resolve(basePath, version),
   log = defaultLog,
   esArgs,
+  useCached = false,
 }) {
   const { downloadPath } = await exports.downloadSnapshot({
     license,
@@ -69,6 +71,7 @@ exports.installSnapshot = async function installSnapshot({
     basePath,
     installPath,
     log,
+    useCached,
   });
 
   return await installArchive(downloadPath, {