chore(refactor): explore parallelization of builds

.changeset/mighty-windows-wink.md

@@ -0,0 +1,8 @@
+---
+"app-builder-lib": patch
+"builder-util": patch
+"dmg-builder": patch
+"electron-builder-squirrel-windows": patch
+---
+
+chore(refactor): enable parallel packaging of archs and targets with `concurrency` config prop

.github/workflows/test.yaml

@@ -72,6 +72,7 @@ jobs:
           - snapTest,debTest,fpmTest,protonTest
           - winPackagerTest,winCodeSignTest,webInstallerTest
           - oneClickInstallerTest,assistedInstallerTest
+          - concurrentBuildsTest
     steps:
       - name: Checkout code repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
@@ -169,6 +170,7 @@ jobs:
           - winCodeSignTest,differentialUpdateTest,squirrelWindowsTest
           - appxTest,msiTest,portableTest,assistedInstallerTest,protonTest
           - BuildTest,oneClickInstallerTest,winPackagerTest,nsisUpdaterTest,webInstallerTest
+          - concurrentBuildsTest
     steps:
       - name: Checkout code repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
@@ -196,6 +198,7 @@ jobs:
           - oneClickInstallerTest,assistedInstallerTest
           - winPackagerTest,winCodeSignTest,webInstallerTest
           - masTest,dmgTest,filesTest,macPackagerTest,differentialUpdateTest,macArchiveTest
+          - concurrentBuildsTest
     steps:
       - name: Checkout code repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
@@ -206,10 +209,11 @@ jobs:
           cache-path: ~/Library/Caches/electron
           cache-key: v-23.3.10-macos-electron
 
-      - name: Install pwsh and wine via brew
+      - name: Install toolset via brew
         run: |
           brew install powershell/tap/powershell
           brew install --cask wine-stable
+          brew install rpm
 
       - name: Test
         run: pnpm ci:test

.vscode/launch.json

@@ -10,7 +10,8 @@
           "console": "integratedTerminal",
           "internalConsoleOptions": "openOnFirstSessionStart",
           "env": {
-            "TEST_FILES": "BuildTest"
+            "TEST_FILES": "macPackagerTest",
+            "UPDATE_SNAPSHOT": "false"
           }
       }
   ]

packages/app-builder-lib/scheme.json

@@ -428,6 +428,20 @@
       ],
       "type": "object"
     },
+    "Concurrency": {
+      "additionalProperties": false,
+      "properties": {
+        "jobs": {
+          "default": 1,
+          "description": "The maximum number of concurrent jobs to run.",
+          "type": "number"
+        }
+      },
+      "required": [
+        "jobs"
+      ],
+      "type": "object"
+    },
     "CustomNsisBinary": {
       "additionalProperties": false,
       "properties": {
@@ -6924,6 +6938,17 @@
       "default": "normal",
       "description": "The compression level. If you want to rapidly test build, `store` can reduce build time significantly. `maximum` doesn't lead to noticeable size difference, but increase build time."
     },
+    "concurrency": {
+      "anyOf": [
+        {
+          "$ref": "#/definitions/Concurrency"
+        },
+        {
+          "type": "null"
+        }
+      ],
+      "description": "[Experimental] Configuration for concurrent builds."
+    },
     "copyright": {
       "default": "Copyright © year ${author}",
       "description": "The human-readable copyright line for the app.",

packages/app-builder-lib/src/configuration.ts

@@ -187,7 +187,13 @@ export interface CommonConfiguration {
    * Ref: https://github.com/electron/fuses
    */
   readonly electronFuses?: FuseOptionsV1 | null
+
+  /**
+   * [Experimental] Configuration for concurrent builds.
+   */
+  readonly concurrency?: Concurrency | null
 }
+
 export interface Configuration extends CommonConfiguration, PlatformSpecificBuildOptions, Hooks {
   /**
    * Whether to use [electron-compile](http://github.com/electron/electron-compile) to compile app. Defaults to `true` if `electron-compile` in the dependencies. And `false` if in the `devDependencies` or doesn't specified.
@@ -439,3 +445,11 @@ export interface FuseOptionsV1 {
    */
   resetAdHocDarwinSignature?: boolean
 }
+
+export interface Concurrency {
+  /**
+   * The maximum number of concurrent jobs to run.
+   * @default 1
+   */
+  jobs: number
+}

packages/app-builder-lib/src/core.ts

@@ -1,5 +1,5 @@
-import { Arch, archFromString, ArchType } from "builder-util"
-import { AllPublishOptions, Nullish } from "builder-util-runtime"
+import { Arch, archFromString, ArchType, AsyncTaskManager } from "builder-util"
+import { AllPublishOptions, CancellationToken, Nullish } from "builder-util-runtime"
 
 // https://github.com/YousefED/typescript-json-schema/issues/80
 export type Publish = AllPublishOptions | Array<AllPublishOptions> | null
@@ -75,6 +75,9 @@ export abstract class Target {
   abstract readonly outDir: string
   abstract readonly options: TargetSpecificOptions | Nullish
 
+  // use only for tasks that cannot be executed in parallel (such as signing on windows and hdiutil on macOS due to file locking)
+  readonly buildQueueManager = new AsyncTaskManager(new CancellationToken())
+
   protected constructor(
     readonly name: string,
     readonly isAsyncSupported: boolean = true
@@ -86,8 +89,8 @@ export abstract class Target {
 
   abstract build(appOutDir: string, arch: Arch): Promise<any>
 
-  finishBuild(): Promise<any> {
-    return Promise.resolve()
+  async finishBuild(): Promise<any> {
+    await this.buildQueueManager.awaitTasks()
   }
 }
 

packages/app-builder-lib/src/macPackager.ts

@@ -357,7 +357,13 @@ export class MacPackager extends PlatformPackager<MacConfiguration> {
       const artifactName = this.expandArtifactNamePattern(masOptions, "pkg", arch)
       const artifactPath = path.join(outDir!, artifactName)
       await this.doFlat(appPath, artifactPath, masInstallerIdentity, keychainFile)
-      await this.dispatchArtifactCreated(artifactPath, null, Arch.x64, this.computeSafeArtifactName(artifactName, "pkg", arch, true, this.platformSpecificBuildOptions.defaultArch))
+      await this.info.emitArtifactBuildCompleted({
+        file: artifactPath,
+        target: null,
+        arch: Arch.x64,
+        safeArtifactName: this.computeSafeArtifactName(artifactName, "pkg", arch, true, this.platformSpecificBuildOptions.defaultArch),
+        packager: this,
+      })
     }
 
     if (!isMas) {

packages/app-builder-lib/src/packager.ts

@@ -9,6 +9,7 @@ import {
   getArtifactArchName,
   InvalidConfigurationError,
   log,
+  MAX_FILE_REQUESTS,
   orNullIfFileNotExist,
   safeStringifyJson,
   serializeToYaml,
@@ -41,6 +42,7 @@ import { resolveFunction } from "./util/resolve"
 import { installOrRebuild, nodeGypRebuild } from "./util/yarn"
 import { PACKAGE_VERSION } from "./version"
 import { AsyncEventEmitter, HandlerType } from "./util/asyncEventEmitter"
+import asyncPool from "tiny-async-pool"
 
 async function createFrameworkInfo(configuration: Configuration, packager: Packager): Promise<Framework> {
   let framework = configuration.framework
@@ -479,6 +481,18 @@ export class Packager {
       const nameToTarget: Map<string, Target> = new Map()
       platformToTarget.set(platform, nameToTarget)
 
+      let poolCount = Math.floor(packager.config.concurrency?.jobs || 1)
+      if (poolCount < 1) {
+        log.warn({ concurrency: poolCount }, "concurrency is invalid, overriding with job count: 1")
+        poolCount = 1
+      } else if (poolCount > MAX_FILE_REQUESTS) {
+        log.warn(
+          { concurrency: poolCount, MAX_FILE_REQUESTS },
+          `job concurrency is greater than recommended MAX_FILE_REQUESTS, this may lead to File Descriptor errors (too many files open). Proceed with caution (e.g. this is an experimental feature)`
+        )
+      }
+      const packPromises: Promise<any>[] = []
+
       for (const [arch, targetNames] of computeArchToTargetNamesMap(archToType, packager, platform)) {
         if (this.cancellationToken.cancelled) {
           break
@@ -488,9 +502,21 @@ export class Packager {
         const outDir = path.resolve(this.projectDir, packager.expandMacro(this.config.directories!.output!, Arch[arch]))
         const targetList = createTargets(nameToTarget, targetNames.length === 0 ? packager.defaultTarget : targetNames, outDir, packager)
         await createOutDirIfNeed(targetList, createdOutDirs)
-        await packager.pack(outDir, arch, targetList, taskManager)
+        const promise = packager.pack(outDir, arch, targetList, taskManager)
+        if (poolCount < 2) {
+          await promise
+        } else {
+          packPromises.push(promise)
+        }
       }
 
+      await asyncPool(poolCount, packPromises, async it => {
+        if (this.cancellationToken.cancelled) {
+          return
+        }
+        await it
+      })
+
       if (this.cancellationToken.cancelled) {
         break
       }
@@ -507,6 +533,9 @@ export class Packager {
     await taskManager.awaitTasks()
 
     for (const target of syncTargetsIfAny) {
+      if (this.cancellationToken.cancelled) {
+        break
+      }
       await target.finishBuild()
     }
     return platformToTarget

packages/app-builder-lib/src/platformPackager.ts

@@ -153,16 +153,6 @@ export abstract class PlatformPackager<DC extends PlatformSpecificBuildOptions>
     )
   }
 
-  dispatchArtifactCreated(file: string, target: Target | null, arch: Arch | null, safeArtifactName?: string | null): Promise<void> {
-    return this.info.emitArtifactBuildCompleted({
-      file,
-      safeArtifactName,
-      target,
-      arch,
-      packager: this,
-    })
-  }
-
   async pack(outDir: string, arch: Arch, targets: Array<Target>, taskManager: AsyncTaskManager): Promise<any> {
     const appOutDir = this.computeAppOutDir(outDir, arch)
     await this.doPack({

packages/app-builder-lib/src/targets/AppxTarget.ts

@@ -49,6 +49,8 @@ const DEFAULT_RESOURCE_LANG = "en-US"
 export default class AppXTarget extends Target {
   readonly options: AppXOptions = deepAssign({}, this.packager.platformSpecificBuildOptions, this.packager.config.appx)
 
+  isAsyncSupported = false
+
   constructor(
     private readonly packager: WinPackager,
     readonly outDir: string
@@ -145,18 +147,20 @@ export default class AppXTarget extends Target {
     if (this.options.makeappxArgs != null) {
       makeAppXArgs.push(...this.options.makeappxArgs)
     }
-    await vm.exec(vm.toVmFile(path.join(vendorPath, "windows-10", signToolArch, "makeappx.exe")), makeAppXArgs)
-    await packager.sign(artifactPath)
-
-    await stageDir.cleanup()
-
-    await packager.info.emitArtifactBuildCompleted({
-      file: artifactPath,
-      packager,
-      arch,
-      safeArtifactName: packager.computeSafeArtifactName(artifactName, "appx"),
-      target: this,
-      isWriteUpdateInfo: this.options.electronUpdaterAware,
+    this.buildQueueManager.add(async () => {
+      await vm.exec(vm.toVmFile(path.join(vendorPath, "windows-10", signToolArch, "makeappx.exe")), makeAppXArgs)
+      await packager.sign(artifactPath)
+
+      await stageDir.cleanup()
+
+      await packager.info.emitArtifactBuildCompleted({
+        file: artifactPath,
+        packager,
+        arch,
+        safeArtifactName: packager.computeSafeArtifactName(artifactName, "appx"),
+        target: this,
+        isWriteUpdateInfo: this.options.electronUpdaterAware,
+      })
     })
   }