refactor(bob)!: remove AAR target support (callstack#463)

### Summary

This removes the (non-working) support for `aar` targets.
Originally, the `aar` support was added with #4 to support AndroidX.
However, it's not needed anymore so we are removing the support.

### Test plan

1. Create a new library with `npx create-react-native-library`
2. Add `aar` to targets
3. run `yarn prepack`
4. Make sure an error is printed and the program stops.

Author: atlj

README.md

@@ -39,7 +39,6 @@ This will ask you few questions about your project and generate a new project in
 - ES modules build for bundlers such as webpack
 - Flow definitions (copies .js files to .flow files)
 - TypeScript definitions (uses `tsc` to generate declaration files)
-- Android AAR files
 
 If you created a project with `create-react-native-library`, `react-native-builder-bob` is **already pre-configured to build your project**. You don't need to configure it again.
 
@@ -209,24 +208,6 @@ Example:
 ["typescript", { "project": "tsconfig.build.json" }]
 ```
 
-##### `aar`
-
-Enable assembling Android AAR files for a library for React Native modules including native code.
-
-The following options are supported:
-
-- `reverseJetify` (`boolean`): If your package is using [AndroidX](https://developer.android.com/jetpack/androidx), it's possible to convert the AAR with the `reverseJetify` option to use the [Android support Library](https://developer.android.com/topic/libraries/support-library) using the [`jetifier`](https://www.npmjs.com/package/jetifier) package. This is useful to publish packages for older projects which haven't migrated to AndroidX.
-
-- `androidPath` (`string`): You can specify a custom path to the `android` directory if it's not in the default location (`android` in the root of your project).
-
-- `androidBundleName`: By default, the generated `aar` file is named as `android.aar`. You can specify a custom name using this option.
-
-Example:
-
-```json
-["aar", { "reverseJetify": true }]
-```
-
 ### Commands
 
 The `bob` CLI exposes the following commands:

packages/create-react-native-library/package.json

@@ -53,9 +53,6 @@
     "validate-npm-package-name": "^4.0.0",
     "yargs": "^17.5.1"
   },
-  "optionalDependencies": {
-    "jetifier": "^2.0.0"
-  },
   "devDependencies": {
     "@babel/cli": "^7.17.10",
     "@babel/core": "^7.18.5",

packages/react-native-builder-bob/package.json

@@ -56,9 +56,6 @@
     "which": "^2.0.2",
     "yargs": "^17.5.1"
   },
-  "optionalDependencies": {
-    "jetifier": "^2.0.0"
-  },
   "devDependencies": {
     "@babel/cli": "^7.17.10",
     "@types/babel__core": "^7.1.19",

packages/react-native-builder-bob/src/index.ts

@@ -7,7 +7,6 @@ import { cosmiconfigSync } from 'cosmiconfig';
 import isGitDirty from 'is-git-dirty';
 import prompts, { type PromptObject } from './utils/prompts';
 import * as logger from './utils/logger';
-import buildAAR from './targets/aar';
 import buildCommonJS from './targets/commonjs';
 import buildModule from './targets/module';
 import buildTypescript from './targets/typescript';
@@ -123,11 +122,6 @@ yargs
             value: 'typescript',
             selected: /\.tsx?$/.test(entryFile),
           },
-          {
-            title: 'aar - bundle android code to a binary',
-            value: 'aar',
-            selected: false,
-          },
         ],
         validate: (input: string) => Boolean(input.length),
       },
@@ -407,15 +401,6 @@ yargs
       report.info(`Building target ${kleur.blue(targetName)}`);
 
       switch (targetName) {
-        case 'aar':
-          await buildAAR({
-            root,
-            source: path.resolve(root, source as string),
-            output: path.resolve(root, output as string, 'aar'),
-            options: targetOptions,
-            report,
-          });
-          break;
         case 'commonjs':
           await buildCommonJS({
             root,

packages/react-native-builder-bob/src/targets/aar.ts

@@ -13,7 +13,7 @@ export type Input = {
   report: Report;
 };
 
-export type Target = 'aar' | 'commonjs' | 'module' | 'typescript';
+export type Target = 'commonjs' | 'module' | 'typescript';
 
 export type Options = {
   source?: string;

packages/react-native-builder-bob/src/types.ts

@@ -4381,11 +4381,6 @@ jake@^10.8.5:
     filelist "^1.0.1"
     minimatch "^3.0.4"
 
-jetifier@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/jetifier/-/jetifier-2.0.0.tgz#699391367ca1fe7bc4da5f8bf691eb117758e4cb"
-  integrity sha512-J4Au9KuT74te+PCCCHKgAjyLlEa+2VyIAEPNCdE5aNkAJ6FAJcAqcdzEkSnzNksIa9NkGmC4tPiClk2e7tCJuQ==
-
 "js-tokens@^3.0.0 || ^4.0.0", js-tokens@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"