CodeSampleX

Exemple

sharp 0.35.2: rotate an image with sharp

Échantillon vérifié pour npm sharp 0.35.2: rotate an image with sharp. Le contrat s'est exécuté sur node 22 · linux alpine/x64 · docker et a réussi.

sha256:a48341f06a0d633312ebe82178c108e45744533ed09d1351b56db7772f217f9e

Ce réseau offre une seule chose : un échantillon qui compile. Il l'a exécuté dans un bac à sable et conservé le reçu signé. Il ne note rien et ne garantit rien : si le même code compile chez vous, il ne l'a pas mesuré. Combien de clés de signature distinctes ont déposé un reçu de contrat réussi. Une seule, c'est l'auteur ; plus d'une signifie que quelqu'un d'autre l'a compilé aussi. Une clé est auto-générée sans identité enregistrée derrière, donc on compte des clés, pas des personnes. MIT-0

Preuves d'exécution

L'environnement déclaré et les exécutions signées sont séparés, pour que vous voyiez exactement ce que cet échantillon a exécuté et où.

Base de preuve
Contrat signé réussi
Reçus de vérification
2
Clés de signature qui l’ont compilé
1
Environnement déclaré linux 24 · ubuntu · glibc 2.39 x64 npm

Environnements des exécutions de vérification

Environnement Contrat Étapes Exécution
node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1		 2026-08-20
node 22 · linux debian/x64 · docker ed25519:c1973797be207ac4 SKIPPED compile:SKIPPED · contract:SKIPPED · load:SKIPPED · resolve:FAIL
CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2…		 2026-09-08

Cas

HOW
Objectif
rotate an image with sharp
Paquets
Symboles
  • sharp.rotate
Créé
2026-08-20T03:49:32Z

Contrat

  1. rotates an image buffer by 90 degrees swapping width and height dimensions
  2. rotates an image buffer by 180 degrees preserving width and height dimensions
  3. rotates an image buffer by 270 degrees swapping width and height dimensions

Fichiers

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

Télécharger l’artefact source (tar.gz)

Code source

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: rotate an image with sharp
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/sharp@0.35.2
Demonstrate these symbols/APIs:
  - sharp.rotate

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:sha256:7377d775562e68c6f106994232fa4f5f1d1eec7996ee41a11484a9303fa5a692","contract":["rotates an image buffer by 90 degrees swapping width and height dimensions","rotates an image buffer by 180 degrees preserving width and height dimensions","rotates an image buffer by 270 degrees swapping width and height dimensions"],"goal":"rotate an image with sharp","kind":"HOW","packages":["pkg:npm/sharp@0.35.2"],"schemaVersion":1,"symbols":["sharp.rotate"]},"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/sharp@0.35.2"],"schemaVersion":1,"symbols":["sharp.rotate"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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package.json
{
  "name": "sharp-rotate-sample",
  "version": "1.0.0",
  "type": "module",
  "description": "Rotate an image with sharp",
  "main": "src/index.mjs",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "sharp": "0.35.2"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "rotate an image with sharp",
  "kind": "HOW",
  "packages": [
    "pkg:npm/sharp@0.35.2"
  ],
  "symbols": [
    "sharp.rotate"
  ]
}
src/index.mjs
import sharp from 'sharp';

/**
 * Rotates an input image buffer by the specified angle in degrees.
 * @param {Buffer|Uint8Array} inputBuffer - The image data buffer.
 * @param {number} [angle] - Angle of rotation in degrees (e.g. 90, 180, 270).
 * @param {object} [options] - Optional rotation configuration such as background color.
 * @returns {Promise<Buffer>} - The rotated image buffer.
 */
export async function rotateImage(inputBuffer, angle, options = {}) {
  return await sharp(inputBuffer)
    .rotate(angle, options)
    .toBuffer();
}
test/contract.mjs
import assert from 'node:assert/strict';
import sharp from 'sharp';
import { rotateImage } from '../src/index.mjs';

async function testContract() {
  // Create a 200x100 blank PNG image buffer offline
  const inputBuffer = await sharp({
    create: {
      width: 200,
      height: 100,
      channels: 4,
      background: { r: 0, g: 128, b: 255, alpha: 1 }
    }
  }).png().toBuffer();

  // Verify input image dimensions
  const inputMeta = await sharp(inputBuffer).metadata();
  assert.equal(inputMeta.width, 200, 'input width should be 200');
  assert.equal(inputMeta.height, 100, 'input height should be 100');

  // Test 90-degree rotation: dimensions should be swapped (100x200)
  const rotated90 = await rotateImage(inputBuffer, 90);
  const meta90 = await sharp(rotated90).metadata();
  assert.equal(meta90.width, 100, `expected width 100 after 90 deg rotation, got ${meta90.width}`);
  assert.equal(meta90.height, 200, `expected height 200 after 90 deg rotation, got ${meta90.height}`);
  assert.equal(meta90.format, 'png', 'expected format to be png');

  // Test 180-degree rotation: dimensions should remain 200x100
  const rotated180 = await rotateImage(inputBuffer, 180);
  const meta180 = await sharp(rotated180).metadata();
  assert.equal(meta180.width, 200, `expected width 200 after 180 deg rotation, got ${meta180.width}`);
  assert.equal(meta180.height, 100, `expected height 100 after 180 deg rotation, got ${meta180.height}`);

  // Test 270-degree rotation: dimensions should be swapped (100x200)
  const rotated270 = await rotateImage(inputBuffer, 270);
  const meta270 = await sharp(rotated270).metadata();
  assert.equal(meta270.width, 100, `expected width 100 after 270 deg rotation, got ${meta270.width}`);
  assert.equal(meta270.height, 200, `expected height 200 after 270 deg rotation, got ${meta270.height}`);

  console.log('Contract test passed: sharp image rotation verified');
}

testContract().catch((err) => {
  console.error('Contract test failed:', err);
  process.exit(1);
});

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