CodeSampleX

サンプル

@electron/get 3.1.0

検証済みサンプル — npm @electron/get 3.1.0. node 22 · linux alpine/x64 · docker で contract を実行し、成功しました: getHostArch returns the host architecture string…

sha256:e0a8972ef0e390d6f555ca1fbdd653abf5146254d94f79c65b47dcbfcdc1170a

このネットワークが提供するのは一つだけです。ビルドされるサンプル。サンドボックスで実行し、署名済みの受領証を保管します。等級はつけず、何も保証しません — 同じコードがあなたの環境でビルドされるかは測定していません。 合格した契約受領証を提出した異なる署名鍵の数です。1 なら作者だけ、2 以上なら他の誰かもビルドしています。鍵は自己生成で背後に登録された身元がないため、数えているのは人ではなく鍵です。 MIT-0

実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

証拠の基準
署名済みコントラクト合格
検証レシート
1
ビルドした署名鍵
1
宣言された環境 linux 24 · ubuntu · glibc 2.39 x64 npm

検証実行環境

環境 コントラクト ステージ 実行日
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-23

ケース

HOW
ゴール
verify pkg:npm/%40electron/get@3.1.0
パッケージ
作成日
2026-08-23T14:03:06Z

コントラクト

  1. getHostArch returns the host architecture string corresponding to Node process architecture
  2. ElectronDownloadCacheMode enum provides standard cache mode values for ReadWrite, ReadOnly, WriteOnly, and Bypass
  3. downloadArtifact downloads and caches a platform artifact using a custom Downloader implementation
  4. downloadArtifact with custom checksums validates SHA256 integrity of the downloaded artifact
  5. downloadArtifact with mismatched checksums rejects with a checksum validation error
  6. downloadArtifact rejects with an Error when the version property is not provided as a string
  7. download fetches the default electron binary for the host platform and architecture using custom Downloader
  8. GotDownloader is exported as a class conforming to the Downloader interface

ファイル

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • test/contract.mjs

ソースアーティファクトをダウンロード (tar.gz)

ソース

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify pkg:npm/%40electron/get@3.1.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40electron/get@3.1.0

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
{"case":{"caseId":"case:sha256:07d4fef639e93256e8a02b712c0ccfe01fa062d39210ad78f01623397e952faf","contract":["getHostArch returns the host architecture string corresponding to Node process architecture","ElectronDownloadCacheMode enum provides standard cache mode values for ReadWrite, ReadOnly, WriteOnly, and Bypass","downloadArtifact downloads and caches a platform artifact using a custom Downloader implementation","downloadArtifact with custom checksums validates SHA256 integrity of the downloaded artifact","downloadArtifact with mismatched checksums rejects with a checksum validation error","downloadArtifact rejects with an Error when the version property is not provided as a string","download fetches the default electron binary for the host platform and architecture using custom Downloader","GotDownloader is exported as a class conforming to the Downloader interface"],"goal":"verify pkg:npm/%40electron/get@3.1.0","kind":"HOW","packages":["pkg:npm/%40electron/get@3.1.0"],"schemaVersion":1},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/%40electron/get@3.1.0"],"schemaVersion":1,"subject":"pkg:npm/%40electron/get@3.1.0","verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sample-electron-get",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "dependencies": {
    "@electron/get": "3.1.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/%40electron/get@3.1.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40electron/get@3.1.0"
  ]
}
test/contract.mjs
import assert from 'node:assert/strict';
import crypto from 'node:crypto';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import process from 'node:process';
import {
  download,
  downloadArtifact,
  ElectronDownloadCacheMode,
  getHostArch,
  GotDownloader,
} from '@electron/get';

class MockDownloader {
  constructor(content = 'sample artifact payload') {
    this.content = content;
    this.downloadCount = 0;
  }

  async download(url, targetFilePath, _options) {
    this.downloadCount++;
    await fs.promises.mkdir(path.dirname(targetFilePath), { recursive: true });
    await fs.promises.writeFile(targetFilePath, this.content);
  }
}

// 1. getHostArch returns the host architecture string corresponding to Node process architecture
{
  const arch = getHostArch();
  assert.equal(typeof arch, 'string');
  assert.ok(arch.length > 0);
  if (process.arch === 'x64') {
    assert.equal(arch, 'x64');
  } else if (process.arch === 'arm64') {
    assert.equal(arch, 'arm64');
  }
}

// 2. ElectronDownloadCacheMode enum provides standard cache mode values for ReadWrite, ReadOnly, WriteOnly, and Bypass
{
  assert.equal(ElectronDownloadCacheMode.ReadWrite, 0);
  assert.equal(ElectronDownloadCacheMode.ReadOnly, 1);
  assert.equal(ElectronDownloadCacheMode.WriteOnly, 2);
  assert.equal(ElectronDownloadCacheMode.Bypass, 3);
  assert.equal(ElectronDownloadCacheMode[0], 'ReadWrite');
  assert.equal(ElectronDownloadCacheMode[1], 'ReadOnly');
  assert.equal(ElectronDownloadCacheMode[2], 'WriteOnly');
  assert.equal(ElectronDownloadCacheMode[3], 'Bypass');
}

// 3. downloadArtifact downloads and caches a platform artifact using a custom Downloader implementation
{
  const tmpDir = await fs.promises.mkdtemp(path.join(os.tmpdir(), 'csx-contract-'));
  const cacheDir = path.join(tmpDir, 'cache');
  const tempDir = path.join(tmpDir, 'temp');
  await fs.promises.mkdir(cacheDir, { recursive: true });
  await fs.promises.mkdir(tempDir, { recursive: true });

  const mockDownloader = new MockDownloader('sample-electron-binary');
  const downloadedPath = await downloadArtifact({
    version: '31.0.0',
    artifactName: 'electron',
    platform: 'linux',
    arch: 'x64',
    cacheRoot: cacheDir,
    tempDirectory: tempDir,
    downloader: mockDownloader,
    unsafelyDisableChecksums: true,
    cacheMode: ElectronDownloadCacheMode.ReadWrite,
  });

  assert.ok(typeof downloadedPath === 'string');
  assert.ok(fs.existsSync(downloadedPath));
  assert.equal(await fs.promises.readFile(downloadedPath, 'utf8'), 'sample-electron-binary');
  assert.equal(mockDownloader.downloadCount, 1);

  // Subsequent call should hit cache
  const cachedPath = await downloadArtifact({
    version: '31.0.0',
    artifactName: 'electron',
    platform: 'linux',
    arch: 'x64',
    cacheRoot: cacheDir,
    tempDirectory: tempDir,
    downloader: mockDownloader,
    unsafelyDisableChecksums: true,
    cacheMode: ElectronDownloadCacheMode.ReadWrite,
  });

  assert.equal(cachedPath, downloadedPath);
  assert.equal(mockDownloader.downloadCount, 1);

  await fs.promises.rm(tmpDir, { recursive: true, force: true });
}

// 4. downloadArtifact with custom checksums validates SHA256 integrity of the downloaded artifact
{
  const tmpDir = await fs.promises.mkdtemp(path.join(os.tmpdir(), 'csx-contract-'));
  const cacheDir = path.join(tmpDir, 'cache');
  const tempDir = path.join(tmpDir, 'temp');
  await fs.promises.mkdir(cacheDir, { recursive: true });
  await fs.promises.mkdir(tempDir, { recursive: true });

  const payload = 'validated-artifact-content';
  const sha256 = crypto.createHash('sha256').update(payload).digest('hex');
  const filename = 'electron-v31.0.0-linux-x64.zip';

  const downloadedPath = await downloadArtifact({
    version: '31.0.0',
    artifactName: 'electron',
    platform: 'linux',
    arch: 'x64',
    cacheRoot: cacheDir,
    tempDirectory: tempDir,
    downloader: new MockDownloader(payload),
    checksums: {
      [filename]: sha256,
    },
    cacheMode: ElectronDownloadCacheMode.ReadWrite,
  });

  assert.ok(fs.existsSync(downloadedPath));
  assert.equal(await fs.promises.readFile(downloadedPath, 'utf8'), payload);

  await fs.promises.rm(tmpDir, { recursive: true, force: true });
}

// 5. downloadArtifact with mismatched checksums rejects with a checksum validation error
{
  const tmpDir = await fs.promises.mkdtemp(path.join(os.tmpdir(), 'csx-contract-'));
  const cacheDir = path.join(tmpDir, 'cache');
  const tempDir = path.join(tmpDir, 'temp');
  await fs.promises.mkdir(cacheDir, { recursive: true });
  await fs.promises.mkdir(tempDir, { recursive: true });

  await assert.rejects(
    downloadArtifact({
      version: '31.0.0',
      artifactName: 'chromedriver',
      platform: 'linux',
      arch: 'x64',
      cacheRoot: cacheDir,
      tempDirectory: tempDir,
      downloader: new MockDownloader('corrupted payload'),
      checksums: {
        'chromedriver-v31.0.0-linux-x64.zip': '0000000000000000000000000000000000000000000000000000000000000000',
      },
      cacheMode: ElectronDownloadCacheMode.Bypass,
    }),
    (err) => {
      assert.ok(err instanceof Error);
      assert.match(err.message, /did not match expected checksum/i);
      return true;
    }
  );

  await fs.promises.rm(tmpDir, { recursive: true, force: true });
}

// 6. downloadArtifact rejects with an Error when the version property is not provided as a string
{
  await assert.rejects(
    downloadArtifact({}),
    (err) => {
      assert.ok(err instanceof Error);
      assert.match(err.message, /Expected property "version" to be provided as a string/i);
      return true;
    }
  );
}

// 7. download fetches the default electron binary for the host platform and architecture using custom Downloader
{
  const tmpDir = await fs.promises.mkdtemp(path.join(os.tmpdir(), 'csx-contract-'));
  const cacheDir = path.join(tmpDir, 'cache');
  const tempDir = path.join(tmpDir, 'temp');
  await fs.promises.mkdir(cacheDir, { recursive: true });
  await fs.promises.mkdir(tempDir, { recursive: true });

  const mockDownloader = new MockDownloader('default-electron-binary');
  const downloadedPath = await download('31.0.0', {
    cacheRoot: cacheDir,
    tempDirectory: tempDir,
    downloader: mockDownloader,
    unsafelyDisableChecksums: true,
    cacheMode: ElectronDownloadCacheMode.ReadWrite,
  });

  assert.ok(typeof downloadedPath === 'string');
  assert.ok(fs.existsSync(downloadedPath));
  assert.equal(await fs.promises.readFile(downloadedPath, 'utf8'), 'default-electron-binary');

  await fs.promises.rm(tmpDir, { recursive: true, force: true });
}

// 8. GotDownloader is exported as a class conforming to the Downloader interface
{
  assert.equal(typeof GotDownloader, 'function');
  const instance = new GotDownloader();
  assert.equal(typeof instance.download, 'function');
}

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