feat: Add Bun as supported package manager

actions/new.action.ts

@@ -168,6 +168,7 @@ const askForPackageManager = async (): Promise<Answers> => {
       PackageManager.NPM,
       PackageManager.YARN,
       PackageManager.PNPM,
+      PackageManager.BUN,
     ]),
   ];
   const prompt = inquirer.createPromptModule();

lib/package-managers/bun.package-manager.ts

@@ -0,0 +1,27 @@
+import { Runner, RunnerFactory } from '../runners';
+import { BunRunner } from '../runners/bun.runner';
+import { AbstractPackageManager } from './abstract.package-manager';
+import { PackageManager } from './package-manager';
+import { PackageManagerCommands } from './package-manager-commands';
+
+export class BunPackageManager extends AbstractPackageManager {
+  constructor() {
+    super(RunnerFactory.create(Runner.BUN) as BunRunner);
+  }
+
+  public get name() {
+    return PackageManager.BUN.toUpperCase();
+  }
+
+  get cli(): PackageManagerCommands {
+    return {
+      install: 'install',
+      add: 'add',
+      update: 'install --force',
+      remove: 'remove',
+      saveFlag: '',
+      saveDevFlag: '--development',
+      silentFlag: '--silent',
+    };
+  }
+}

lib/package-managers/index.ts

@@ -4,5 +4,6 @@ export * from './abstract.package-manager';
 export * from './npm.package-manager';
 export * from './yarn.package-manager';
 export * from './pnpm.package-manager';
+export * from './bun.package-manager';
 export * from './project.dependency';
 export * from './package-manager-commands';

lib/package-managers/package-manager.factory.ts

@@ -4,6 +4,7 @@ import { NpmPackageManager } from './npm.package-manager';
 import { PackageManager } from './package-manager';
 import { YarnPackageManager } from './yarn.package-manager';
 import { PnpmPackageManager } from './pnpm.package-manager';
+import { BunPackageManager } from './bun.package-manager';
 
 export class PackageManagerFactory {
   public static create(name: PackageManager | string): AbstractPackageManager {
@@ -14,6 +15,8 @@ export class PackageManagerFactory {
         return new YarnPackageManager();
       case PackageManager.PNPM:
         return new PnpmPackageManager();
+      case PackageManager.BUN:
+        return new BunPackageManager();
       default:
         throw new Error(`Package manager ${name} is not managed.`);
     }
@@ -35,6 +38,11 @@ export class PackageManagerFactory {
         return this.create(PackageManager.PNPM);
       }
 
+      const hasBunLockFile = files.includes('bun.lockb');
+      if (hasBunLockFile) {
+        return this.create(PackageManager.BUN);
+      }
+
       return this.create(DEFAULT_PACKAGE_MANAGER);
     } catch (error) {
       return this.create(DEFAULT_PACKAGE_MANAGER);

lib/package-managers/package-manager.ts

@@ -2,4 +2,5 @@ export enum PackageManager {
   NPM = 'npm',
   YARN = 'yarn',
   PNPM = 'pnpm',
+  BUN = 'bun',
 }

lib/runners/bun.runner.ts

@@ -0,0 +1,7 @@
+import { AbstractRunner } from './abstract.runner';
+
+export class BunRunner extends AbstractRunner {
+  constructor() {
+    super('bun');
+  }
+}

lib/runners/runner.factory.ts

@@ -4,6 +4,7 @@ import { Runner } from './runner';
 import { SchematicRunner } from './schematic.runner';
 import { YarnRunner } from './yarn.runner';
 import { PnpmRunner } from './pnpm.runner';
+import { BunRunner } from './bun.runner';
 
 export class RunnerFactory {
   public static create(runner: Runner) {
@@ -20,6 +21,9 @@ export class RunnerFactory {
       case Runner.PNPM:
         return new PnpmRunner();
 
+      case Runner.BUN:
+        return new BunRunner();
+
       default:
         console.info(chalk.yellow(`[WARN] Unsupported runner: ${runner}`));
     }

lib/runners/runner.ts

@@ -3,4 +3,5 @@ export enum Runner {
   NPM,
   YARN,
   PNPM,
+  BUN,
 }

test/lib/package-managers/bun.package-manager.spec.ts

@@ -0,0 +1,125 @@
+import { join } from 'path';
+import {
+  PackageManagerCommands,
+  BunPackageManager,
+} from '../../../lib/package-managers';
+import { BunRunner } from '../../../lib/runners/bun.runner';
+
+jest.mock('../../../lib/runners/bun.runner');
+
+describe('BunPackageManager', () => {
+  let packageManager: BunPackageManager;
+  beforeEach(() => {
+    (BunRunner as any).mockClear();
+    (BunRunner as any).mockImplementation(() => {
+      return {
+        run: (): Promise<void> => Promise.resolve(),
+      };
+    });
+    packageManager = new BunPackageManager();
+  });
+  it('should be created', () => {
+    expect(packageManager).toBeInstanceOf(BunPackageManager);
+  });
+  it('should have the correct cli commands', () => {
+    const expectedValues: PackageManagerCommands = {
+      install: 'install',
+      add: 'add',
+      update: 'install --force',
+      remove: 'remove',
+      saveFlag: '',
+      saveDevFlag: '--development',
+      silentFlag: '--silent',
+    };
+    expect(packageManager.cli).toMatchObject(expectedValues);
+  });
+  describe('install', () => {
+    it('should use the proper command for installing', () => {
+      const spy = jest.spyOn((packageManager as any).runner, 'run');
+      const dirName = '/tmp';
+      const testDir = join(process.cwd(), dirName);
+      packageManager.install(dirName, 'bun');
+      expect(spy).toBeCalledWith('install --silent', true, testDir);
+    });
+  });
+  describe('addProduction', () => {
+    it('should use the proper command for adding production dependencies', () => {
+      const spy = jest.spyOn((packageManager as any).runner, 'run');
+      const dependencies = ['@nestjs/common', '@nestjs/core'];
+      const tag = '5.0.0';
+      const command = `add ${dependencies
+        .map((dependency) => `${dependency}@${tag}`)
+        .join(' ')}`;
+      packageManager.addProduction(dependencies, tag);
+      expect(spy).toBeCalledWith(command, true);
+    });
+  });
+  describe('addDevelopment', () => {
+    it('should use the proper command for adding development dependencies', () => {
+      const spy = jest.spyOn((packageManager as any).runner, 'run');
+      const dependencies = ['@nestjs/common', '@nestjs/core'];
+      const tag = '5.0.0';
+      const command = `add --development ${dependencies
+        .map((dependency) => `${dependency}@${tag}`)
+        .join(' ')}`;
+      packageManager.addDevelopment(dependencies, tag);
+      expect(spy).toBeCalledWith(command, true);
+    });
+  });
+  describe('updateProduction', () => {
+    it('should use the proper command for updating production dependencies', () => {
+      const spy = jest.spyOn((packageManager as any).runner, 'run');
+      const dependencies = ['@nestjs/common', '@nestjs/core'];
+      const command = `install --force ${dependencies.join(' ')}`;
+      packageManager.updateProduction(dependencies);
+      expect(spy).toBeCalledWith(command, true);
+    });
+  });
+  describe('updateDevelopment', () => {
+    it('should use the proper command for updating development dependencies', () => {
+      const spy = jest.spyOn((packageManager as any).runner, 'run');
+      const dependencies = ['@nestjs/common', '@nestjs/core'];
+      const command = `install --force ${dependencies.join(' ')}`;
+      packageManager.updateDevelopment(dependencies);
+      expect(spy).toBeCalledWith(command, true);
+    });
+  });
+  describe('upgradeProduction', () => {
+    it('should use the proper command for upgrading production dependencies', () => {
+      const spy = jest.spyOn((packageManager as any).runner, 'run');
+      const dependencies = ['@nestjs/common', '@nestjs/core'];
+      const tag = '5.0.0';
+      const uninstallCommand = `remove ${dependencies.join(' ')}`;
+
+      const installCommand = `add ${dependencies
+        .map((dependency) => `${dependency}@${tag}`)
+        .join(' ')}`;
+
+      return packageManager.upgradeProduction(dependencies, tag).then(() => {
+        expect(spy.mock.calls).toEqual([
+          [uninstallCommand, true],
+          [installCommand, true],
+        ]);
+      });
+    });
+  });
+  describe('upgradeDevelopment', () => {
+    it('should use the proper command for upgrading production dependencies', () => {
+      const spy = jest.spyOn((packageManager as any).runner, 'run');
+      const dependencies = ['@nestjs/common', '@nestjs/core'];
+      const tag = '5.0.0';
+      const uninstallCommand = `remove --development ${dependencies.join(' ')}`;
+
+      const installCommand = `add --development ${dependencies
+        .map((dependency) => `${dependency}@${tag}`)
+        .join(' ')}`;
+
+      return packageManager.upgradeDevelopment(dependencies, tag).then(() => {
+        expect(spy.mock.calls).toEqual([
+          [uninstallCommand, true],
+          [installCommand, true],
+        ]);
+      });
+    });
+  });
+});

test/lib/package-managers/package-manager.factory.spec.ts

@@ -4,6 +4,7 @@ import {
   PackageManagerFactory,
   PnpmPackageManager,
   YarnPackageManager,
+  BunPackageManager,
 } from '../../../lib/package-managers';
 
 jest.mock('fs', () => ({
@@ -45,6 +46,15 @@ describe('PackageManagerFactory', () => {
       );
     });
 
+    it('should return BunPackageManager when "bun.lockb" file is found', async () => {
+      (fs.promises.readdir as jest.Mock).mockResolvedValue(['bun.lockb']);
+
+      const whenPackageManager = PackageManagerFactory.find();
+      await expect(whenPackageManager).resolves.toBeInstanceOf(
+        BunPackageManager,
+      );
+    });
+
     describe('when there are all supported lock files', () => {
       it('should prioritize "yarn.lock" file over all the others lock files', async () => {
         (fs.promises.readdir as jest.Mock).mockResolvedValue([