vite 5.4.14: build

audit=false

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 vite.build in pkg:npm/vite@5.4.14
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/vite@5.4.14
Demonstrate these symbols/APIs:
  - vite.build

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.

{"case":{"caseId":"case:sha256:ec573b6808656477c7449bcf9b7f441b49496ce9373b47290d21b0f2e4222dcd","contract":["build produces RollupOutput chunks in memory when write option is false","build writes output bundle files to outDir when write option is true","build invokes plugin lifecycle hooks including buildStart and transform during bundling","build replaces global identifier definitions configured in define option","build respects configFile false preventing external configuration file resolution","build rejects with an error when the configured entry file does not exist"],"goal":"verify vite.build in pkg:npm/vite@5.4.14","kind":"HOW","packages":["pkg:npm/vite@5.4.14"],"schemaVersion":1,"symbols":["vite.build"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/vite@5.4.14"],"schemaVersion":1,"subject":"pkg:npm/vite@5.4.14","symbols":["vite.build"],"verifierAdapter":"node-typescript@1"}

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}

{
  "name": "sample-vite-build",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "vite": "5.4.14"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify vite.build in pkg:npm/vite@5.4.14",
  "kind": "HOW",
  "packages": [
    "pkg:npm/vite@5.4.14"
  ],
  "symbols": [
    "vite.build"
  ]
}

import { build } from 'vite';

/**
 * Executes a Vite build with the given inline configuration.
 *
 * @param {import('vite').InlineConfig} [inlineConfig={}] - Inline configuration options
 * @returns {Promise<import('rollup').RollupOutput | import('rollup').RollupOutput[] | import('rollup').RollupWatcher>} Build result
 */
export async function runBuild(inlineConfig = {}) {
  return build({
    configFile: false,
    ...inlineConfig
  });
}

/**
 * Builds an entry point entirely in memory (write: false) returning output chunks and assets.
 *
 * @param {string} entry - Absolute or relative path to entry file
 * @param {import('vite').InlineConfig} [overrides={}] - Additional build configuration
 * @returns {Promise<import('rollup').RollupOutput>} Rollup output with chunks
 */
export async function buildToMemory(entry, overrides = {}) {
  const result = await build({
    configFile: false,
    logLevel: 'silent',
    ...overrides,
    build: {
      write: false,
      lib: {
        entry,
        formats: ['es']
      },
      ...overrides.build
    }
  });

  return Array.isArray(result) ? result[0] : result;
}

/**
 * Builds an entry point and writes the output files to the specified output directory.
 *
 * @param {string} entry - Absolute or relative path to entry file
 * @param {string} outDir - Target directory for built assets
 * @param {import('vite').InlineConfig} [overrides={}] - Additional build configuration
 * @returns {Promise<import('rollup').RollupOutput>} Build result
 */
export async function buildToDisk(entry, outDir, overrides = {}) {
  const result = await build({
    configFile: false,
    logLevel: 'silent',
    ...overrides,
    build: {
      outDir,
      write: true,
      lib: {
        entry,
        formats: ['es']
      },
      ...overrides.build
    }
  });

  return Array.isArray(result) ? result[0] : result;
}

export { build };
export default build;

import assert from 'node:assert/strict';
import fs from 'node:fs/promises';
import path from 'node:path';
import os from 'node:os';
import { build, runBuild, buildToMemory, buildToDisk } from '../src/index.mjs';

async function runContract() {
  const tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'vite-build-contract-'));

  try {
    const entryFile = path.join(tmpDir, 'main.js');
    await fs.writeFile(
      entryFile,
      'export const answer = 42;\nexport function getAnswer() { return answer; }\n'
    );

    // 1. build produces RollupOutput chunks in memory when write option is false
    {
      const memoryResult = await buildToMemory(entryFile, { root: tmpDir });
      assert.ok(memoryResult && typeof memoryResult === 'object', 'Expected build result object');
      assert.ok(Array.isArray(memoryResult.output), 'Expected output to be array of chunks');

      const jsChunk = memoryResult.output.find(
        (chunk) => chunk.type === 'chunk' && (chunk.fileName.endsWith('.js') || chunk.fileName.endsWith('.mjs'))
      );
      assert.ok(jsChunk, 'Expected generated JS chunk in memory output');
      assert.ok(jsChunk.code.includes('42'), 'Expected chunk code to contain entry content');
    }

    // 2. build writes output bundle files to outDir when write option is true
    {
      const outDir = path.join(tmpDir, 'dist');
      const diskResult = await buildToDisk(entryFile, outDir, { root: tmpDir });
      assert.ok(diskResult && typeof diskResult === 'object');

      const files = await fs.readdir(outDir);
      const hasBundle = files.some(
        (file) => file.endsWith('.js') || file.endsWith('.mjs')
      );
      assert.ok(hasBundle, 'Expected bundle file written to outDir on disk');
    }

    // 3. build invokes plugin lifecycle hooks including buildStart and transform during bundling
    {
      let hookBuildStartCalled = false;
      let hookTransformCalled = false;

      const testPlugin = {
        name: 'test-contract-plugin',
        buildStart() {
          hookBuildStartCalled = true;
        },
        transform(code, id) {
          if (id.endsWith('main.js')) {
            hookTransformCalled = true;
            return code.replace('42', '100');
          }
        }
      };

      const pluginResult = await build({
        root: tmpDir,
        configFile: false,
        logLevel: 'silent',
        plugins: [testPlugin],
        build: {
          write: false,
          lib: {
            entry: entryFile,
            formats: ['es']
          }
        }
      });

      assert.equal(hookBuildStartCalled, true, 'Expected buildStart plugin hook called');
      assert.equal(hookTransformCalled, true, 'Expected transform plugin hook called');

      const output = Array.isArray(pluginResult) ? pluginResult[0].output : pluginResult.output;
      const chunk = output.find((c) => c.type === 'chunk');
      assert.ok(chunk.code.includes('100'), 'Expected transformed code in output');
    }

    // 4. build replaces global identifier definitions configured in define option
    {
      const defineEntry = path.join(tmpDir, 'define-entry.js');
      await fs.writeFile(
        defineEntry,
        'export const appVersion = __APP_VERSION__;\n'
      );

      const defineResult = await build({
        root: tmpDir,
        configFile: false,
        logLevel: 'silent',
        define: {
          __APP_VERSION__: JSON.stringify('1.2.3')
        },
        build: {
          write: false,
          lib: {
            entry: defineEntry,
            formats: ['es']
          }
        }
      });

      const output = Array.isArray(defineResult) ? defineResult[0].output : defineResult.output;
      const chunk = output.find((c) => c.type === 'chunk');
      assert.ok(chunk.code.includes('1.2.3'), 'Expected replaced define constant');
    }

    // 5. build respects configFile false preventing external configuration file resolution
    {
      const dummyConfig = path.join(tmpDir, 'vite.config.js');
      await fs.writeFile(
        dummyConfig,
        'throw new Error("External vite.config.js should not be loaded");\n'
      );

      // Should complete without error because configFile: false ignores dummyConfig
      const noConfigResult = await runBuild({
        root: tmpDir,
        logLevel: 'silent',
        build: {
          write: false,
          lib: {
            entry: entryFile,
            formats: ['es']
          }
        }
      });

      assert.ok(noConfigResult, 'Expected build to succeed ignoring config file');
    }

    // 6. build rejects with an error when the configured entry file does not exist
    {
      let caught = false;
      try {
        await build({
          root: tmpDir,
          configFile: false,
          logLevel: 'silent',
          build: {
            lib: {
              entry: path.join(tmpDir, 'does-not-exist.js')
            }
          }
        });
      } catch (err) {
        caught = true;
        assert.ok(err, 'Expected error on missing entry');
      }
      assert.equal(caught, true, 'Expected rejection on non-existent entry');
    }

    console.log('Contract tests passed successfully.');
  } finally {
    await fs.rm(tmpDir, { recursive: true, force: true });
  }
}

await runContract();