✨ Add force option to download command

src/cmds.ts

@@ -64,8 +64,14 @@ export const commands: Cmd[] = [
     requestController: async () => (await import('./commands/discard')).discard,
   },
   {
-    cmd: 'download [ffVersion]',
+    cmd: 'download',
     description: 'Download Firefox.',
+    options: [
+      {
+        arg: '--force',
+        description: 'Delete the engine directory if it already exists',
+      }
+    ],
     requestController: async () =>
       (await import('./commands/download')).download,
   },

src/commands/download.ts

@@ -4,12 +4,15 @@
 
 import { bin_name, config } from '..'
 import { log } from '../log'
-
 import {
   downloadInternals
 } from './download/firefox'
 
-export const download = async (): Promise<void> => {
+type Options = {
+  force?: boolean
+}
+
+export const download = async (options: Options): Promise<void> => {
   const version = config.version.version
 
   // If gFFVersion isn't specified, provide legible error
@@ -20,7 +23,7 @@ export const download = async (): Promise<void> => {
     process.exit(1)
   }
 
-  await downloadInternals(version)
+  await downloadInternals({version, force: options.force})
 
   log.success(
     `You should be ready to make changes to ${config.name}.`,

src/commands/download/firefox.ts

@@ -1,6 +1,8 @@
 import execa from 'execa'
 import { existsSync, rmSync, writeFileSync } from 'node:fs'
+import { readdir } from 'node:fs/promises'
 import { dirname, resolve } from 'node:path'
+
 import { bin_name } from '../..'
 import { BASH_PATH, ENGINE_DIR, MELON_TMP_DIR } from '../../constants'
 import { log } from '../../log'
@@ -19,7 +21,6 @@ import {
   unpackAddon,
 } from './addon'
 import { configPath } from '../../utils'
-import { readdir } from 'node:fs/promises'
 
 export function shouldSetupFirefoxSource() {
   return !(
@@ -111,7 +112,7 @@ async function downloadFirefoxSource(version: string) {
   return filename
 }
 
-export async function downloadInternals(version: string) {
+export async function downloadInternals({ version, force }: { version: string, force?: boolean }) {
   // Provide a legible error if there is no version specified
   if (!version) {
     log.error(
@@ -120,6 +121,11 @@ export async function downloadInternals(version: string) {
     process.exit(1)
   }
 
+  if (force && existsSync(ENGINE_DIR)) {
+    log.info('Removing existing workspace')
+    rmSync(ENGINE_DIR, { recursive: true })
+  }
+
   // If the engine directory is empty, we should delete it.
   const engineIsEmpty = await readdir(ENGINE_DIR).then((files) => files.length === 0)
   if (existsSync(ENGINE_DIR) && engineIsEmpty) {

src/commands/update.ts

@@ -1,7 +1,6 @@
 // This Source Code Form is subject to the terms of the Mozilla Public
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
-import { existsSync, rmSync } from 'node:fs'
 
 import { bin_name, config } from '..'
 import { log } from '../log'
@@ -9,15 +8,13 @@ import {
   downloadInternals
 } from './download/firefox'
 import { getLatestFF } from '../utils'
-import { ENGINE_DIR } from '../constants'
 
 export const update = async (): Promise<void> => {
   const version = await getLatestFF(config.version.product)
 
-  // Delete the existing engine directory to download the new version
-  if (existsSync(ENGINE_DIR)) rmSync(ENGINE_DIR, { recursive: true })
-
-  await downloadInternals(version)
+  // We are using force here to delete the engine directory if it already
+  // exists to make way for the new version.
+  await downloadInternals({version, force: true})
 
   log.success(
     `Firefox has successfully been updated to ${version}.`,