Function installDependencies

ai/scripts/migrations/bootstrapWorktree.mjs:529–550

({projectRoot, log = console.log, exec = execFileAsync})

 * @returns {Promise<'already-installed'|'installed'>} Action taken.
 */
export async function installDependencies({projectRoot, log = console.log, exec = execFileAsync}) {
    const nodeModulesPath = path.join(projectRoot, 'node_modules');
    let action;

    if (await exists(nodeModulesPath)) {
        log(`install skip (exists): node_modules`);
        action = 'already-installed';
    } else {
        log(`installing dependencies (npm install)...`);
        const start = Date.now();
        await exec('npm', ['install'], {cwd: projectRoot});
        log(`installed dependencies in ${Math.round((Date.now() - start) / 1000)}s`);
        action = 'installed';
    }

    log(`bundling parse5 (test-runner prerequisite)...`);
    const bundleStart = Date.now();
    await exec('npm', ['run', 'bundle-parse5'], {cwd: projectRoot});
    log(`bundled parse5 in ${Math.round((Date.now() - bundleStart) / 1000)}s`);

    return action;
}

/**
 * @summary Runs the full `npm run build-all` after ensuring dependencies are installed.