feat: rewrite in typescript

.gitignore

@@ -9,3 +9,5 @@ third_party
 .disable-auto-updates
 /*.yml
 generated.env.sh
+dist
+build-tools-spec*

.vscode/settings.json

@@ -0,0 +1,9 @@
+{
+  "cSpell.words": [
+    "gerrit",
+    "osid",
+    "REAPI",
+    "SDKROOT",
+    "SISO"
+  ]
+}

package.json

@@ -4,16 +4,19 @@
   "engines": {
     "node": ">= 18.0.0"
   },
+  "type": "module",
   "main": "null",
   "private": true,
   "scripts": {
     "lint:markdown": "electron-markdownlint \"**/*.md\"",
-    "lint:js": "prettier --check \"src/**/*.js\" \"tests/*.js\" \"src/e\"",
+    "lint:js": "prettier --check \"src/**/*.{js,ts}\" \"tests/*.{js,ts}\"",
     "lint": "npm run lint:js && npm run lint:markdown",
-    "prettier:write": "prettier --write \"src/**/*.js\" \"tests/*.js\" \"src/e\"",
+    "prettier:write": "prettier --write \"src/**/*.{js,ts}\" \"tests/*.{js,ts}\"",
     "prepare": "husky",
+    "pretest": "tsc",
     "test": "nyc --reporter=lcov --reporter=text-summary vitest run --reporter=verbose --exclude tests/bootstrap.spec.mjs",
-    "test:all": "nyc --reporter=lcov --reporter=text-summary vitest run --reporter=verbose"
+    "test:all": "nyc --reporter=lcov --reporter=text-summary vitest run --reporter=verbose",
+    "postinstall": "tsc"
   },
   "repository": "https://github.com/electron/build-tools",
   "author": "Electron Authors",
@@ -22,35 +25,43 @@
     "@marshallofsound/chrome-cookies-secure": "^2.1.1",
     "@octokit/auth-oauth-device": "^3.1.1",
     "@octokit/rest": "^18.5.2",
-    "ajv": "^8.11.0",
-    "ajv-formats": "^2.1.1",
-    "chalk": "^2.4.1",
+    "@types/node": "^22.7.1",
+    "@types/progress": "^2.0.7",
+    "@types/semver": "^7.7.0",
+    "@types/tar": "^6.1.13",
+    "ajv": "^8.17.1",
+    "ajv-formats": "^3.0.1",
+    "chalk": "^5.4.1",
     "command-exists": "^1.2.8",
-    "commander": "^9.0.0",
+    "commander": "^9.5.0",
     "debug": "^4.3.1",
     "extract-zip": "^2.0.1",
     "inquirer": "^8.2.4",
     "node-gyp": "^10.0.1",
     "open": "^6.4.0",
-    "path-key": "^3.1.0",
     "progress": "^2.0.3",
     "readline-sync": "^1.4.10",
     "semver": "^7.6.0",
     "tar": "^6.2.1",
+    "typescript": "^5.8.3",
     "vscode-uri": "^3.0.7",
-    "which": "^2.0.2",
     "yaml": "^2.4.5"
   },
   "devDependencies": {
     "@electron/lint-roller": "^1.13.0",
+    "@tsconfig/node22": "^22.0.2",
+    "@types/command-exists": "^1.2.3",
+    "@types/inquirer": "^8.0.0",
+    "@types/readline-sync": "^1.4.8",
     "husky": "^9.1.6",
+    "json-schema-to-typescript": "^15.0.4",
     "lint-staged": "^15.2.10",
     "nyc": "^17.1.0",
     "prettier": "^3.3.3",
     "vitest": "^3.0.6"
   },
   "lint-staged": {
-    "*.js": [
+    "*.{js,ts}": [
       "prettier --write"
     ],
     "e": [

src/download.ts

@@ -0,0 +1,32 @@
+import fs from 'node:fs';
+import stream from 'node:stream';
+import { pipeline } from 'node:stream/promises';
+
+import { fatal } from './utils/logging.js';
+import { progressStream } from './utils/download.js';
+
+const write = fs.createWriteStream(process.argv[3]);
+
+async function tryDownload(attemptsLeft = 3) {
+  const response = await fetch(process.argv[2]);
+  const total = parseInt(response.headers.get('content-length') || '1', 10);
+
+  let promise: Promise<void>;
+  if (process.env.CI) {
+    promise = pipeline(stream.Readable.fromWeb(response.body!), write);
+  } else {
+    const progress = progressStream(total, '[:bar] :mbRateMB/s :percent :etas');
+    promise = pipeline(stream.Readable.fromWeb(response.body!), progress, write);
+  }
+
+  await promise.catch((err) => {
+    if (attemptsLeft === 0) {
+      return fatal(err);
+    }
+
+    console.log('Download failed, trying', attemptsLeft, 'more times');
+    tryDownload(attemptsLeft - 1);
+  });
+}
+
+tryDownload();

src/e-auto-update.js → src/e-auto-update.ts

@@ -1,17 +1,17 @@
 #!/usr/bin/env node
 
-const chalk = require('chalk');
-const cp = require('child_process');
-const fs = require('fs');
-const path = require('path');
-const program = require('commander');
-const semver = require('semver');
+import chalk from 'chalk';
+import cp from 'node:child_process';
+import fs from 'node:fs';
+import path from 'node:path';
+import { program } from 'commander';
+import semver from 'semver';
 
-const { color, fatal } = require('./utils/logging');
+import { color, fatal } from './utils/logging.js';
 
 const BUILD_TOOLS_INSTALLER_MIN_VERSION = '1.1.0';
 
-const markerFilePath = path.join(__dirname, '..', '.disable-auto-updates');
+const markerFilePath = path.join(import.meta.dirname, '..', '.disable-auto-updates');
 
 program
   .description('Check for build-tools updates or enable/disable automatic updates')
@@ -27,7 +27,7 @@ program
       }
       console.log('Automatic updates enabled');
     } catch (e) {
-      fatal(e);
+      fatal(e as Error);
     }
   });
 
@@ -39,7 +39,7 @@ program
       fs.closeSync(fs.openSync(markerFilePath, 'w'));
       console.log('Automatic updates disabled');
     } catch (e) {
-      fatal(e);
+      fatal(e as Error);
     }
   });
 
@@ -72,7 +72,7 @@ function checkForUpdates() {
       );
 
       try {
-        packageJson = JSON.parse(fs.readFileSync(buildToolsInstallerPackage));
+        packageJson = JSON.parse(fs.readFileSync(buildToolsInstallerPackage, 'utf-8'));
       } catch {
         continue;
       }
@@ -87,8 +87,8 @@ function checkForUpdates() {
       break;
     }
 
-    const execOpts = { cwd: path.resolve(__dirname, '..') };
-    const git = (args) => cp.execSync(`git ${args}`, execOpts).toString('utf8').trim();
+    const execOpts = { cwd: path.resolve(import.meta.dirname, '..') };
+    const git = (args: string) => cp.execSync(`git ${args}`, execOpts).toString('utf8').trim();
 
     const headCmd = 'rev-parse --verify HEAD';
     const headBefore = git(headCmd);
@@ -127,7 +127,7 @@ function checkForUpdates() {
       console.log('build-tools updated to latest version!');
     }
   } catch (e) {
-    fatal(e);
+    fatal(e as Error);
   }
 }
 

src/e-backport.js → src/e-backport.ts

@@ -1,15 +1,15 @@
 #!/usr/bin/env node
 
-const { Octokit } = require('@octokit/rest');
-const chalk = require('chalk').default;
-const program = require('commander');
-const inquirer = require('inquirer');
-const path = require('path');
+import { Octokit } from '@octokit/rest';
+import chalk from 'chalk';
+import { program } from 'commander';
+import inquirer from 'inquirer';
+import path from 'node:path';
 
-const evmConfig = require('./evm-config');
-const { spawnSync } = require('./utils/depot-tools');
-const { getGitHubAuthToken } = require('./utils/github-auth');
-const { fatal } = require('./utils/logging');
+import * as evmConfig from './evm-config.js';
+import { depotSpawnSync } from './utils/depot-tools.js';
+import { getGitHubAuthToken } from './utils/github-auth.js';
+import { fatal } from './utils/logging.js';
 
 program
   .arguments('[pr]')
@@ -36,8 +36,8 @@ program
     }
 
     const targetBranches = pr.labels
-      .filter((label) => label.name.startsWith('needs-manual-bp/'))
-      .map((label) => label.name.substring(16));
+      .filter((label) => label.name?.startsWith('needs-manual-bp/'))
+      .map((label) => label.name!.substring(16));
     if (targetBranches.length === 0) {
       fatal('The given pull request is not needing any manual backports yet');
       return;
@@ -56,24 +56,30 @@ program
     const gitOpts = {
       cwd: path.resolve(config.root, 'src', 'electron'),
       stdio: 'pipe',
-    };
-    const result = spawnSync(config, 'git', ['status', '--porcelain'], gitOpts);
+    } as const;
+    const result = depotSpawnSync(config, 'git', ['status', '--porcelain'], gitOpts);
     if (result.status !== 0 || result.stdout.toString().trim().length !== 0) {
       fatal(
         "Your current git working directory is not clean, we won't erase your local changes. Clean it up and try again",
       );
       return;
     }
 
-    spawnSync(config, 'git', ['checkout', targetBranch], gitOpts, 'Failed to checkout base branch');
-    spawnSync(
+    depotSpawnSync(
+      config,
+      'git',
+      ['checkout', targetBranch],
+      gitOpts,
+      'Failed to checkout base branch',
+    );
+    depotSpawnSync(
       config,
       'git',
       ['pull', 'origin', targetBranch],
       gitOpts,
       'Failed to update base branch',
     );
-    spawnSync(
+    depotSpawnSync(
       config,
       'git',
       ['fetch', 'origin', pr.base.ref],
@@ -82,22 +88,30 @@ program
     );
 
     const manualBpBranch = `manual-bp/${user.login}/pr/${prNumber}/branch/${targetBranch}`;
-    spawnSync(config, 'git', ['branch', '-D', manualBpBranch], gitOpts);
-    spawnSync(
+    depotSpawnSync(config, 'git', ['branch', '-D', manualBpBranch], gitOpts);
+    depotSpawnSync(
       config,
       'git',
       ['checkout', '-b', manualBpBranch],
       gitOpts,
       `Failed to checkout new branch "${manualBpBranch}"`,
     );
 
-    spawnSync(config, 'yarn', ['install'], gitOpts, `Failed to do "yarn install" on new branch`);
+    depotSpawnSync(
+      config,
+      'yarn',
+      ['install'],
+      gitOpts,
+      `Failed to do "yarn install" on new branch`,
+    );
 
-    const cherryPickResult = spawnSync(config, 'git', ['cherry-pick', pr.merge_commit_sha], {
+    const cherryPickResult = depotSpawnSync(config, 'git', ['cherry-pick', pr.merge_commit_sha], {
       cwd: gitOpts.cwd,
     });
 
-    const pushCommand = chalk.yellow(!!config.remotes.electron.fork ? 'git push fork' : 'git push');
+    const pushCommand = chalk.yellow(
+      !!config.remotes?.electron.fork ? 'git push fork' : 'git push',
+    );
     const cherryPickCommand = chalk.yellow('git cherry-pick --continue');
     const prCommand = chalk.yellow(`e pr --backport ${prNumber}`);