Remove dependency 'async'

package.json

@@ -73,7 +73,6 @@
     "@node-rs/crc32": "1.10.3",
     "7zip-min": "1.4.4",
     "archiver": "7.0.1",
-    "async": "3.2.5",
     "async-mutex": "0.5.0",
     "chalk": "5.3.0",
     "class-transformer": "0.5.1",

src/driveSemaphore.ts

@@ -1,9 +1,9 @@
 import path from 'node:path';
 
-import async, { AsyncResultCallback } from 'async';
 import { Mutex, Semaphore } from 'async-mutex';
 
 import Constants from './constants.js';
+import async from './polyfill/async.js';
 import FsPoly from './polyfill/fsPoly.js';
 import File from './types/files/file.js';
 
@@ -38,17 +38,16 @@ export default class DriveSemaphore {
     return async.mapLimit(
       files,
       Constants.MAX_FS_THREADS,
-      async (file, callback: AsyncResultCallback<V, Error>) => {
+      async (file) => {
         try {
-          const val = await this.processFile(file, runnable, disks);
-          callback(undefined, val);
+          return await this.processFile(file, runnable, disks);
         } catch (error) {
           if (error instanceof Error) {
-            callback(error);
+            throw error;
           } else if (typeof error === 'string') {
-            callback(new Error(error));
+            throw new Error(error);
           } else {
-            callback(new Error('failed to execute runnable'));
+            throw new Error('failed to execute runnable');
           }
         }
       },

src/igir.ts

@@ -1,4 +1,3 @@
-import async from 'async';
 import chalk from 'chalk';
 import isAdmin from 'is-admin';
 
@@ -30,6 +29,7 @@ import ROMIndexer from './modules/romIndexer.js';
 import ROMScanner from './modules/romScanner.js';
 import StatusGenerator from './modules/statusGenerator.js';
 import ArrayPoly from './polyfill/arrayPoly.js';
+import async from './polyfill/async.js';
 import FsPoly from './polyfill/fsPoly.js';
 import Timer from './timer.js';
 import DAT from './types/dats/dat.js';
@@ -101,7 +101,7 @@ export default class Igir {
 
     // Process every DAT
     datProcessProgressBar.logTrace(`processing ${dats.length.toLocaleString()} DAT${dats.length !== 1 ? 's' : ''}`);
-    await async.eachLimit(dats, this.options.getDatThreads(), async (dat, callback) => {
+    await async.eachLimit(dats, this.options.getDatThreads(), async (dat) => {
       await datProcessProgressBar.incrementProgress();
 
       const progressBar = await this.logger.addProgressBar(
@@ -173,7 +173,6 @@ export default class Igir {
       }
 
       await datProcessProgressBar.incrementDone();
-      callback();
     });
     datProcessProgressBar.logTrace(`done processing ${dats.length.toLocaleString()} DAT${dats.length !== 1 ? 's' : ''}`);
 

src/polyfill/async.ts

@@ -0,0 +1,25 @@
+import { Semaphore } from 'async-mutex';
+
+export default {
+  async eachLimit<T>(
+    arr: T[],
+    limit: number,
+    iterator: (val: T) => void | Promise<void>,
+  ): Promise<void> {
+    const semaphore = new Semaphore(limit);
+    await Promise.all(
+      arr.map(async (val) => semaphore.runExclusive(async () => iterator(val))),
+    );
+  },
+
+  async mapLimit<T, R>(
+    arr: T[],
+    limit: number,
+    iterator: (val: T) => R | Promise<R>,
+  ): Promise<R[]> {
+    const semaphore = new Semaphore(limit);
+    return Promise.all(
+      arr.map(async (val) => semaphore.runExclusive(async () => iterator(val))),
+    );
+  },
+};

src/types/files/archives/rar.ts

@@ -1,10 +1,10 @@
 import path from 'node:path';
 
-import async, { AsyncResultCallback } from 'async';
 import { Mutex } from 'async-mutex';
 import unrar from 'node-unrar-js';
 
 import Constants from '../../../constants.js';
+import async from '../../../polyfill/async.js';
 import Archive from './archive.js';
 import ArchiveEntry from './archiveEntry.js';
 
@@ -25,16 +25,13 @@ export default class Rar extends Archive {
     return async.mapLimit(
       [...rar.getFileList().fileHeaders].filter((fileHeader) => !fileHeader.flags.directory),
       Constants.ARCHIVE_ENTRY_SCANNER_THREADS_PER_ARCHIVE,
-      async (fileHeader, callback: AsyncResultCallback<ArchiveEntry<this>, Error>) => {
-        const archiveEntry = await ArchiveEntry.entryOf({
-          archive: this,
-          entryPath: fileHeader.name,
-          size: fileHeader.unpSize,
-          crc32: fileHeader.crc.toString(16),
-          // If MD5, SHA1, or SHA256 is desired, this file will need to be extracted to calculate
-        }, checksumBitmask);
-        callback(undefined, archiveEntry);
-      },
+      async (fileHeader) => ArchiveEntry.entryOf({
+        archive: this,
+        entryPath: fileHeader.name,
+        size: fileHeader.unpSize,
+        crc32: fileHeader.crc.toString(16),
+        // If MD5, SHA1, or SHA256 is desired, this file will need to be extracted to calculate
+      }, checksumBitmask),
     );
   }
 

src/types/files/archives/sevenZip.ts

@@ -1,10 +1,10 @@
 import path from 'node:path';
 
 import _7z, { Result } from '7zip-min';
-import async, { AsyncResultCallback } from 'async';
 import { Mutex } from 'async-mutex';
 
 import Constants from '../../../constants.js';
+import async from '../../../polyfill/async.js';
 import fsPoly from '../../../polyfill/fsPoly.js';
 import Archive from './archive.js';
 import ArchiveEntry from './archiveEntry.js';
@@ -86,16 +86,13 @@ export default class SevenZip extends Archive {
     return async.mapLimit(
       filesIn7z.filter((result) => !result.attr?.startsWith('D')),
       Constants.ARCHIVE_ENTRY_SCANNER_THREADS_PER_ARCHIVE,
-      async (result, callback: AsyncResultCallback<ArchiveEntry<this>, Error>) => {
-        const archiveEntry = await ArchiveEntry.entryOf({
-          archive: this,
-          entryPath: result.name,
-          size: Number.parseInt(result.size, 10),
-          crc32: result.crc,
-          // If MD5, SHA1, or SHA256 is desired, this file will need to be extracted to calculate
-        }, checksumBitmask);
-        callback(undefined, archiveEntry);
-      },
+      async (result) => ArchiveEntry.entryOf({
+        archive: this,
+        entryPath: result.name,
+        size: Number.parseInt(result.size, 10),
+        crc32: result.crc,
+        // If MD5, SHA1, or SHA256 is desired, this file will need to be extracted to calculate
+      }, checksumBitmask),
     );
   }
 

src/types/files/archives/zip.ts

@@ -4,10 +4,10 @@ import { Readable } from 'node:stream';
 import { clearInterval } from 'node:timers';
 
 import archiver, { Archiver } from 'archiver';
-import async, { AsyncResultCallback } from 'async';
 import unzipper, { Entry } from 'unzipper';
 
 import Constants from '../../../constants.js';
+import async from '../../../polyfill/async.js';
 import fsPoly from '../../../polyfill/fsPoly.js';
 import StreamPoly from '../../../polyfill/streamPoly.js';
 import File from '../file.js';
@@ -33,7 +33,7 @@ export default class Zip extends Archive {
     return async.mapLimit(
       archive.files.filter((entryFile) => entryFile.type === 'File'),
       Constants.ARCHIVE_ENTRY_SCANNER_THREADS_PER_ARCHIVE,
-      async (entryFile, callback: AsyncResultCallback<ArchiveEntry<this>, Error>) => {
+      async (entryFile) => {
         let checksums: ChecksumProps = {};
         if (checksumBitmask & ~ChecksumBitmask.CRC32) {
           const entryStream = entryFile.stream()
@@ -54,14 +54,13 @@ export default class Zip extends Archive {
         }
         const { crc32, ...checksumsWithoutCrc } = checksums;
 
-        const archiveEntry = await ArchiveEntry.entryOf({
+        return ArchiveEntry.entryOf({
           archive: this,
           entryPath: entryFile.path,
           size: entryFile.uncompressedSize,
           crc32: crc32 ?? entryFile.crc32.toString(16),
           ...checksumsWithoutCrc,
         }, checksumBitmask);
-        callback(undefined, archiveEntry);
       },
     );
   }
@@ -193,9 +192,7 @@ export default class Zip extends Archive {
        *  also want to make sure the queue processing stays busy. Use 3 as a middle-ground.
        */
       3,
-      async.asyncify(async (
-        [inputFile, outputArchiveEntry]: [File, ArchiveEntry<Zip>],
-      ): Promise<void> => {
+      async ([inputFile, outputArchiveEntry]) => {
         const streamProcessor = async (stream: Readable): Promise<void> => {
           // Catch stream errors such as `ENOENT: no such file or directory`
           stream.on('error', catchError);
@@ -228,7 +225,7 @@ export default class Zip extends Archive {
             catchError(new Error(`failed to write '${inputFile.toString()}' to '${outputArchiveEntry.toString()}'`));
           }
         }
-      }),
+      },
     );
 
     if (zipFileError) {

src/types/options.ts

@@ -3,7 +3,6 @@ import 'reflect-metadata';
 import os from 'node:os';
 import path from 'node:path';
 
-import async, { AsyncResultCallback } from 'async';
 import {
   Expose, instanceToPlain, plainToInstance, Transform,
 } from 'class-transformer';
@@ -12,6 +11,7 @@ import { isNotJunk } from 'junk';
 import micromatch from 'micromatch';
 import moment from 'moment';
 
+import async from '../../src/polyfill/async.js';
 import LogLevel from '../console/logLevel.js';
 import Constants from '../constants.js';
 import ArrayPoly from '../polyfill/arrayPoly.js';
@@ -633,17 +633,16 @@ export default class Options implements OptionsProps {
     const isNonDirectory = await async.mapLimit(
       globbedPaths,
       Constants.MAX_FS_THREADS,
-      async (file, callback: AsyncResultCallback<boolean, Error>) => {
+      async (file) => {
         if (!await fsPoly.exists(file) && URLPoly.canParse(file)) {
-          callback(undefined, true);
-          return;
+          return true;
         }
 
         try {
-          callback(undefined, !(await fsPoly.isDirectory(file)));
+          return !(await fsPoly.isDirectory(file));
         } catch {
           // Assume errors mean the path doesn't exist
-          callback(undefined, false);
+          return false;
         }
       },
     );

test/igir.test.ts

@@ -144,7 +144,7 @@ describe('with explicit DATs', () => {
   });
 
   it('should throw on all invalid dats', async () => {
-    await expect(async () => new Igir(new Options({
+    await expect(new Igir(new Options({
       dat: ['src/*'],
     }), new Logger(LogLevel.NEVER)).main()).rejects.toThrow(/no valid dat files/i);
   });