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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { spawnSync } from 'node:child_process';
import {
cpSync,
rmSync,
mkdirSync,
existsSync,
copyFileSync,
writeFileSync,
readFileSync,
} from 'node:fs';
import { join, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';
import process from 'node:process';
import { globSync } from 'glob';
import { createHash } from 'node:crypto';
const __dirname = dirname(fileURLToPath(import.meta.url));
const root = join(__dirname, '..');
const distDir = join(root, 'dist');
const bundleDir = join(root, 'bundle');
const stagingDir = join(bundleDir, 'native_modules');
const seaConfigPath = join(root, 'sea-config.json');
const manifestPath = join(bundleDir, 'manifest.json');
const entitlementsPath = join(root, 'scripts/entitlements.plist');
// --- Helper Functions ---
/**
* Safely executes a command using spawnSync.
* @param {string} command
* @param {string[]} args
* @param {object} options
*/
function runCommand(command, args, options = {}) {
let finalCommand = command;
let useShell = options.shell || false;
// On Windows, npm/npx are batch files and need a shell
if (
process.platform === 'win32' &&
(command === 'npm' || command === 'npx')
) {
finalCommand = `${command}.cmd`;
useShell = true;
}
const finalOptions = {
stdio: 'inherit',
cwd: root,
shell: useShell,
...options,
};
const result = spawnSync(finalCommand, args, finalOptions);
if (result.status !== 0) {
if (result.error) {
throw result.error;
}
throw new Error(
`Command failed with exit code ${result.status}: ${command}`,
);
}
return result;
}
/**
* Removes existing digital signatures from a binary.
* @param {string} filePath
*/
function removeSignature(filePath) {
console.log(`Removing signature from ${filePath}...`);
const platform = process.platform;
try {
if (platform === 'darwin') {
spawnSync('codesign', ['--remove-signature', filePath], {
stdio: 'ignore',
});
} else if (platform === 'win32') {
spawnSync('signtool', ['remove', '/s', filePath], {
stdio: 'ignore',
});
}
} catch {
// Best effort: Ignore failures
}
}
/**
* Signs a binary using hardcoded tools for the platform.
* @param {string} filePath
*/
function signFile(filePath) {
const platform = process.platform;
if (platform === 'darwin') {
const identity = process.env.APPLE_IDENTITY || '-';
console.log(`Signing ${filePath} (Identity: ${identity})...`);
const args = [
'--sign',
identity,
'--force',
'--timestamp',
'--options',
'runtime',
];
if (existsSync(entitlementsPath)) {
args.push('--entitlements', entitlementsPath);
}
args.push(filePath);
runCommand('codesign', args);
} else if (platform === 'win32') {
const args = ['sign'];
if (process.env.WINDOWS_PFX_FILE && process.env.WINDOWS_PFX_PASSWORD) {
args.push(
'/f',
process.env.WINDOWS_PFX_FILE,
'/p',
process.env.WINDOWS_PFX_PASSWORD,
);
} else {
args.push('/a');
}
args.push(
'/fd',
'SHA256',
'/td',
'SHA256',
'/tr',
'http://timestamp.digicert.com',
filePath,
);
console.log(`Signing ${filePath}...`);
try {
runCommand('signtool', args, { stdio: 'pipe' });
} catch (e) {
let msg = e.message;
if (process.env.WINDOWS_PFX_PASSWORD) {
msg = msg.replaceAll(process.env.WINDOWS_PFX_PASSWORD, '******');
}
throw new Error(msg);
}
} else if (platform === 'linux') {
console.log(`Skipping signing for ${filePath} on Linux.`);
}
}
console.log('Build Binary Script Started...');
// 1. Clean dist
if (existsSync(distDir)) {
console.log('Cleaning dist directory...');
rmSync(distDir, { recursive: true, force: true });
}
mkdirSync(distDir, { recursive: true });
// 2. Build Bundle
console.log('Running npm clean, install, and bundle...');
try {
runCommand('npm', ['run', 'clean']);
runCommand('npm', ['install']);
runCommand('npm', ['run', 'bundle']);
} catch (e) {
console.error('Build step failed:', e.message);
process.exit(1);
}
// 3. Stage & Sign Native Modules
const includeNativeModules = process.env.BUNDLE_NATIVE_MODULES !== 'false';
console.log(`Include Native Modules: ${includeNativeModules}`);
if (includeNativeModules) {
console.log('Staging and signing native modules...');
// Prepare staging
if (existsSync(stagingDir))
rmSync(stagingDir, { recursive: true, force: true });
mkdirSync(stagingDir, { recursive: true });
// Copy @lydell/node-pty to staging
const lydellSrc = join(root, 'node_modules/@lydell');
const lydellStaging = join(stagingDir, 'node_modules/@lydell');
if (existsSync(lydellSrc)) {
mkdirSync(dirname(lydellStaging), { recursive: true });
cpSync(lydellSrc, lydellStaging, { recursive: true });
} else {
console.warn(
'Warning: @lydell/node-pty not found in node_modules. Native terminal features may fail.',
);
}
// Sign Staged .node files
try {
const nodeFiles = globSync('**/*.node', {
cwd: stagingDir,
absolute: true,
});
for (const file of nodeFiles) {
signFile(file);
}
} catch (e) {
console.warn('Warning: Failed to sign native modules:', e.code);
}
} else {
console.log('Skipping native modules bundling (BUNDLE_NATIVE_MODULES=false)');
}
// 4. Generate SEA Configuration and Manifest
console.log('Generating SEA configuration and manifest...');
const packageJson = JSON.parse(
readFileSync(join(root, 'package.json'), 'utf8'),
);
// Helper to calc hash
const sha256 = (content) => createHash('sha256').update(content).digest('hex');
// Read Main Bundle
const geminiBundlePath = join(root, 'bundle/gemini.js');
const geminiContent = readFileSync(geminiBundlePath);
const geminiHash = sha256(geminiContent);
const assets = {
'gemini.mjs': geminiBundlePath, // Use .js source but map to .mjs for runtime ESM
'manifest.json': 'bundle/manifest.json',
};
const manifest = {
main: 'gemini.mjs',
mainHash: geminiHash,
version: packageJson.version,
files: [],
};
// Helper to recursively find files from STAGING
function addAssetsFromDir(baseDir, runtimePrefix) {
const fullDir = join(stagingDir, baseDir);
if (!existsSync(fullDir)) return;
const items = globSync('**/*', { cwd: fullDir, nodir: true });
for (const item of items) {
const relativePath = join(runtimePrefix, item);
const assetKey = `files:${relativePath}`;
const fsPath = join(fullDir, item);
// Calc hash
const content = readFileSync(fsPath);
const hash = sha256(content);
assets[assetKey] = fsPath;
manifest.files.push({ key: assetKey, path: relativePath, hash: hash });
}
}
// Add sb files
const sbFiles = globSync('sandbox-macos-*.sb', { cwd: bundleDir });
for (const sbFile of sbFiles) {
const fsPath = join(bundleDir, sbFile);
const content = readFileSync(fsPath);
const hash = sha256(content);
assets[sbFile] = fsPath;
manifest.files.push({ key: sbFile, path: sbFile, hash: hash });
}
// Add policy files
const policyDir = join(bundleDir, 'policies');
if (existsSync(policyDir)) {
const policyFiles = globSync('*.toml', { cwd: policyDir });
for (const policyFile of policyFiles) {
const fsPath = join(policyDir, policyFile);
const relativePath = join('policies', policyFile);
const content = readFileSync(fsPath);
const hash = sha256(content);
// Use a unique key to avoid collision if filenames overlap (though unlikely here)
// But sea-launch writes to 'path', so key is just for lookup.
const assetKey = `policies:${policyFile}`;
assets[assetKey] = fsPath;
manifest.files.push({ key: assetKey, path: relativePath, hash: hash });
}
}
// Add assets from Staging
if (includeNativeModules) {
addAssetsFromDir('node_modules/@lydell', 'node_modules/@lydell');
}
writeFileSync(manifestPath, JSON.stringify(manifest, null, 2));
const seaConfig = {
main: 'sea/sea-launch.cjs',
output: 'dist/sea-prep.blob',
disableExperimentalSEAWarning: true,
assets: assets,
};
writeFileSync(seaConfigPath, JSON.stringify(seaConfig, null, 2));
console.log(`Configured ${Object.keys(assets).length} embedded assets.`);
// 5. Generate SEA Blob
console.log('Generating SEA blob...');
try {
runCommand('node', ['--experimental-sea-config', 'sea-config.json']);
} catch (e) {
console.error('Failed to generate SEA blob:', e.message);
// Cleanup
if (existsSync(seaConfigPath)) rmSync(seaConfigPath);
if (existsSync(manifestPath)) rmSync(manifestPath);
if (existsSync(stagingDir))
rmSync(stagingDir, { recursive: true, force: true });
process.exit(1);
}
// Check blob existence
const blobPath = join(distDir, 'sea-prep.blob');
if (!existsSync(blobPath)) {
console.error('Error: sea-prep.blob not found in dist/');
process.exit(1);
}
// 6. Identify Target & Prepare Binary
const platform = process.platform;
const arch = process.arch;
const targetName = `${platform}-${arch}`;
console.log(`Targeting: ${targetName}`);
const targetDir = join(distDir, targetName);
mkdirSync(targetDir, { recursive: true });
const nodeBinary = process.execPath;
const binaryName = platform === 'win32' ? 'gemini.exe' : 'gemini';
const targetBinaryPath = join(targetDir, binaryName);
console.log(`Copying node binary from ${nodeBinary} to ${targetBinaryPath}...`);
copyFileSync(nodeBinary, targetBinaryPath);
// Remove existing signature using helper
removeSignature(targetBinaryPath);
// Copy standard bundle assets (policies, .sb files)
console.log('Copying additional resources...');
if (existsSync(bundleDir)) {
cpSync(bundleDir, targetDir, { recursive: true });
}
// Clean up source JS files from output (we only want embedded)
const filesToRemove = [
'gemini.js',
'gemini.mjs',
'gemini.js.map',
'gemini.mjs.map',
'gemini-sea.cjs',
'sea-launch.cjs',
'manifest.json',
'native_modules',
'policies',
];
filesToRemove.forEach((f) => {
const p = join(targetDir, f);
if (existsSync(p)) rmSync(p, { recursive: true, force: true });
});
// Remove .sb files from targetDir
const sbFilesToRemove = globSync('sandbox-macos-*.sb', { cwd: targetDir });
for (const f of sbFilesToRemove) {
rmSync(join(targetDir, f));
}
// 7. Inject Blob
console.log('Injecting SEA blob...');
const sentinelFuse = 'NODE_SEA_FUSE_fce680ab2cc467b6e072b8b5df1996b2';
try {
const args = [
'postject',
targetBinaryPath,
'NODE_SEA_BLOB',
blobPath,
'--sentinel-fuse',
sentinelFuse,
];
if (platform === 'darwin') {
args.push('--macho-segment-name', 'NODE_SEA');
}
runCommand('npx', args);
console.log('Injection successful.');
} catch (e) {
console.error('Postject failed:', e.message);
process.exit(1);
}
// 8. Final Signing
console.log('Signing final executable...');
try {
signFile(targetBinaryPath);
} catch (e) {
console.warn('Warning: Final signing failed:', e.code);
console.warn('Continuing without signing...');
}
// 9. Cleanup
console.log('Cleaning up artifacts...');
rmSync(blobPath);
if (existsSync(seaConfigPath)) rmSync(seaConfigPath);
if (existsSync(manifestPath)) rmSync(manifestPath);
if (existsSync(stagingDir))
rmSync(stagingDir, { recursive: true, force: true });
console.log(`Binary built successfully in ${targetDir}`);