Extend script to allow multiple blobs to be processed from csv

GitOrigin-RevId: ad47eb754436ddc7f56b27ceda627268c3a030a1

services/history-v1/storage/scripts/backup_blob.mjs

@@ -11,6 +11,9 @@ import assert from '../lib/assert.js'
 import knex from '../lib/knex.js'
 import { client } from '../lib/mongodb.js'
 import { setTimeout } from 'node:timers/promises'
+import fs from 'node:fs'
+
+await loadGlobalBlobs()
 
 /**
  * Gracefully shutdown the process
@@ -26,13 +29,72 @@ async function gracefulShutdown() {
 
 /**
  *
- * @return {Promise<{hash: string, historyId: string}>}
+ * @param {string} row
+ * @return {BackupBlobJob}
+ */
+function parseCSVRow(row) {
+  const [historyId, hash] = row.split(',')
+  validateBackedUpBlobJob({ historyId, hash })
+  return { historyId, hash }
+}
+
+/**
+ *
+ * @param {BackupBlobJob} job
+ */
+function validateBackedUpBlobJob(job) {
+  assert.projectId(job.historyId)
+  assert.blobHash(job.hash)
+}
+
+/**
+ *
+ * @param {string} path
+ * @return {Promise<Array<BackupBlobJob>>}
  */
-async function fetchOptions() {
-  const { historyId, hash } = commandLineArgs([
-    { name: 'historyId', type: String },
-    { name: 'hash', type: String },
-  ])
+async function readCSV(path) {
+  let fh
+  /** @type {Array<BackupBlobJob>} */
+  const rows = []
+  try {
+    fh = await fs.promises.open(path, 'r')
+  } catch (error) {
+    console.error(`Could not open file: ${error}`)
+    throw error
+  }
+  for await (const line of fh.readLines()) {
+    try {
+      const row = parseCSVRow(line)
+      if (GLOBAL_BLOBS.has(row.hash)) {
+        console.log(`Skipping global blob: ${line}`)
+        continue
+      }
+      rows.push(row)
+    } catch (error) {
+      console.error(error instanceof Error ? error.message : error)
+      console.log(`Skipping invalid row: ${line}`)
+    }
+  }
+  return rows
+}
+
+/**
+ * @typedef {Object} BackupBlobJob
+ * @property {string} hash
+ * @property {string} historyId
+ */
+
+/**
+ * @param {Object} options
+ * @property {string} [options.historyId]
+ * @property {string} [options.hash]
+ * @property {string} [options.input]
+ * @return {Promise<Array<BackupBlobJob>>}
+ */
+async function initialiseJobs({ historyId, hash, input }) {
+  if (input) {
+    return await readCSV(input)
+  }
 
   if (!historyId) {
     console.error('historyId is required')
@@ -40,24 +102,20 @@ async function fetchOptions() {
     await gracefulShutdown()
   }
 
-  assert.projectId(historyId)
-
   if (!hash) {
     console.error('hash is required')
     process.exitCode = 1
     await gracefulShutdown()
   }
 
-  assert.blobHash(hash)
-
-  await loadGlobalBlobs()
+  validateBackedUpBlobJob({ historyId, hash })
 
   if (GLOBAL_BLOBS.has(hash)) {
     console.error(`Blob ${hash} is a global blob; not backing up`)
     process.exitCode = 1
     await gracefulShutdown()
   }
-  return { hash, historyId }
+  return [{ hash, historyId }]
 }
 
 /**
@@ -80,28 +138,34 @@ export async function downloadAndBackupBlob(historyId, hash) {
   })
 }
 
-let options
+let jobs
+
+const options = commandLineArgs([
+  { name: 'historyId', type: String },
+  { name: 'hash', type: String },
+  { name: 'input', type: String },
+])
 
 try {
-  options = await fetchOptions()
+  jobs = await initialiseJobs(options)
 } catch (error) {
   console.error(error)
   await gracefulShutdown()
 }
 
-if (!options) {
+if (!Array.isArray(jobs)) {
   // This is mostly to satisfy typescript
   process.exitCode = 1
   await gracefulShutdown()
   process.exit(1)
 }
 
-try {
-  const { hash, historyId } = options
-  await downloadAndBackupBlob(historyId, hash)
-} catch (error) {
-  console.error(error)
-  process.exitCode = 1
-} finally {
-  await gracefulShutdown()
+for (const { historyId, hash } of jobs) {
+  try {
+    await downloadAndBackupBlob(historyId, hash)
+  } catch (error) {
+    console.error(error)
+    process.exitCode = 1
+  }
 }
+await gracefulShutdown()