chore: Remove shelljs use from backup command (#37356)

This is towards fixing `appsmithctl` into a modern component of the
project. First order of business is to get rid of the `shelljs`
dependency, since we don't really need it that seriously, and since it
does weird stuff with `require()` that we can't use `esbuild` to build
`appsmithctl`.

Further PRs will remove `shelljs` from other commands as well, and then
we'll remove `shelljs` from our dependencies.


## Automation

/test sanity

### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results  -->
> [!TIP]
> 🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/11814325698>
> Commit: 98261ee
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=11814325698&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Sanity`
> Spec:
> <hr>Wed, 13 Nov 2024 09:58:36 UTC
<!-- end of auto-generated comment: Cypress test results  -->


## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Improved backup process with enhanced error handling and asynchronous
checks for available disk space.
- New function for executing commands with output capture added to
utility functions.

- **Bug Fixes**
- Refined error messages for insufficient disk space and password
mismatches during backup.

- **Tests**
- Expanded test suite for backup utilities and command execution,
ensuring robust coverage of various scenarios.

- **Documentation**
	- Updated formatting of numeric constants for better readability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

deploy/docker/fs/opt/appsmith/utils/bin/backup.js

@@ -1,7 +1,6 @@
 const fsPromises = require('fs/promises');
 const path = require('path');
 const os = require('os');
-const shell = require('shelljs');
 const utils = require('./utils');
 const Constants = require('./constants');
 const logger = require('./logger');
@@ -16,17 +15,18 @@ async function run() {
   let errorCode = 0;
   let backupRootPath, archivePath, encryptionPassword;
   let encryptArchive = false;
+
   try {
-    const check_supervisord_status_cmd = '/usr/bin/supervisorctl >/dev/null 2>&1';
-    shell.exec(check_supervisord_status_cmd, function (code) {
-      if (code > 0) {
-        shell.echo('application is not running, starting supervisord');
-        shell.exec('/usr/bin/supervisord');
-      }
-    });
+    await utils.execCommandSilent(["/usr/bin/supervisorctl"]);
+  } catch (e) {
+    console.error('Supervisor is not running, exiting.');
+    process.exitCode = 1;
+    return;
+  }
 
+  try {
     console.log('Available free space at /appsmith-stacks');
-    const availSpaceInBytes = getAvailableBackupSpaceInBytes();
+    const availSpaceInBytes = getAvailableBackupSpaceInBytes("/appsmith-stacks");
     console.log('\n');
 
     checkAvailableBackupSpace(availSpaceInBytes);
@@ -232,13 +232,14 @@ function getTimeStampInISO() {
   return new Date().toISOString().replace(/:/g, '-')
 }
 
-function getAvailableBackupSpaceInBytes() {
-  return parseInt(shell.exec('df --output=avail -B 1 /appsmith-stacks | tail -n 1'), 10)
+async function getAvailableBackupSpaceInBytes(path) {
+  const stat = await fsPromises.statfs(path);
+  return stat.bsize * stat.bfree;
 }
 
 function checkAvailableBackupSpace(availSpaceInBytes) {
   if (availSpaceInBytes < Constants.MIN_REQUIRED_DISK_SPACE_IN_BYTES) {
-    throw new Error('Not enough space avaliable at /appsmith-stacks. Please ensure availability of atleast 2GB to backup successfully.');
+    throw new Error("Not enough space available at /appsmith-stacks. Please ensure availability of at least 2GB to backup successfully.");
   }
 }
 
@@ -259,4 +260,4 @@ module.exports = {
   removeOldBackups,
   getEncryptionPasswordFromUser,
   encryptBackupArchive,
-};
+};

deploy/docker/fs/opt/appsmith/utils/bin/backup.test.js

@@ -3,7 +3,6 @@ const Constants = require('./constants');
 const os = require('os');
 const fsPromises = require('fs/promises');
 const utils = require('./utils');
-const shell = require('shelljs');
 const readlineSync = require('readline-sync');
 
 describe('Backup Tests', () => {
@@ -13,19 +12,19 @@ test('Timestamp string in ISO format', () => {
   expect(backup.getTimeStampInISO()).toMatch(/(\d{4})-(\d{2})-(\d{2})T(\d{2})\-(\d{2})\-(\d{2})\.(\d{3})Z/)
 });
 
-test('Available Space in /appsmith-stacks volume in Bytes', () => {
-  shell.exec = jest.fn((format) => '20');
-  const res = expect(backup.getAvailableBackupSpaceInBytes())
-  res.toBe(20)
-
+test('Available Space in /appsmith-stacks volume in Bytes', async () => {
+  const res = expect(await backup.getAvailableBackupSpaceInBytes("/"))
+  res.toBeGreaterThan(1024 * 1024)
 });
+
 it('Checkx the constant is 2 GB', () => {
   let size = 2 * 1024 * 1024 * 1024
   expect(Constants.MIN_REQUIRED_DISK_SPACE_IN_BYTES).toBe(size)
 });
+
 it('Should throw Error when the available size is below MIN_REQUIRED_DISK_SPACE_IN_BYTES', () => {
   let size = Constants.MIN_REQUIRED_DISK_SPACE_IN_BYTES - 1;
-  expect(() => {backup.checkAvailableBackupSpace(size)}).toThrow('Not enough space avaliable at /appsmith-stacks. Please ensure availability of atleast 2GB to backup successfully.');
+  expect(() => backup.checkAvailableBackupSpace(size)).toThrow();
 });
 
 it('Should not hould throw Error when the available size is >= MIN_REQUIRED_DISK_SPACE_IN_BYTES', () => {

deploy/docker/fs/opt/appsmith/utils/bin/constants.js

@@ -11,9 +11,9 @@ const LAST_ERROR_MAIL_TS = "/appsmith-stacks/data/backup/last-error-mail-ts"
 
 const ENV_PATH = "/appsmith-stacks/configuration/docker.env"
 
-const MIN_REQUIRED_DISK_SPACE_IN_BYTES = 2147483648 // 2GB
+const MIN_REQUIRED_DISK_SPACE_IN_BYTES = 2_147_483_648 // 2GB
 
-const DURATION_BETWEEN_BACKUP_ERROR_MAILS_IN_MILLI_SEC = 21600000 // 6 hrs
+const DURATION_BETWEEN_BACKUP_ERROR_MAILS_IN_MILLI_SEC = 21_600_000 // 6 hrs
 
 const APPSMITH_DEFAULT_BACKUP_ARCHIVE_LIMIT = 4 // 4 backup archives
 
@@ -27,4 +27,4 @@ module.exports = {
     DURATION_BETWEEN_BACKUP_ERROR_MAILS_IN_MILLI_SEC,
     APPSMITH_DEFAULT_BACKUP_ARCHIVE_LIMIT,
     ENV_PATH
-}
+}

deploy/docker/fs/opt/appsmith/utils/bin/utils.js

@@ -154,9 +154,10 @@ function execCommandSilent(cmd, options) {
 
     const p = childProcess.spawn(cmd[0], cmd.slice(1), {
       ...options,
+      stdio: "ignore",
     });
 
-    p.on("exit", (code) => {
+    p.on("close", (code) => {
       if (isPromiseDone) {
         return;
       }
@@ -173,8 +174,7 @@ function execCommandSilent(cmd, options) {
         return;
       }
       isPromiseDone = true;
-      console.error("Error running command", err);
-      reject();
+      reject(err);
     });
   });
 }

deploy/docker/fs/opt/appsmith/utils/bin/utils.test.js

@@ -0,0 +1,22 @@
+const { describe, test, expect } = require("@jest/globals");
+const utils = require("./utils");
+
+describe("execCommandSilent", () => {
+
+  test("Runs a command", async () => {
+    await utils.execCommandSilent(["echo"]);
+  });
+
+  test("silences stdout and stderr", async () => {
+    const consoleSpy = jest.spyOn(console, "log");
+    await utils.execCommandSilent(["node", "--eval", "console.log('test')"]);
+    expect(consoleSpy).not.toHaveBeenCalled();
+    consoleSpy.mockRestore();
+  });
+
+  test("handles errors silently", async () => {
+    await expect(utils.execCommandSilent(["nonexistentcommand"]))
+      .rejects.toThrow();
+  });
+
+});