gemini-cli/packages/sdk/src/fs.ts at main · EricRahm/gemini-cli

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/**

* @license

* SPDX-License-Identifier: Apache-2.0

import type { Config as CoreConfig } from '@google/gemini-cli-core';

import type { AgentFilesystem } from './types.js';

import fs from 'node:fs/promises';

/**

* SDK implementation of {@link AgentFilesystem} that enforces path-based

* access policies from the core Config.

* Read operations return `null` when access is denied; write operations

* throw an error.

export class SdkAgentFilesystem implements AgentFilesystem {

constructor(private readonly config: CoreConfig) {}

async readFile(path: string): Promise<string | null> {

const error = this.config.validatePathAccess(path, 'read');

if (error) {

// For now, if access is denied, we can either throw or return null.

// Returning null makes sense for "file not found or readable".

return null;

}

try {

return await fs.readFile(path, 'utf-8');

} catch {

return null;

}

async writeFile(path: string, content: string): Promise<void> {

const error = this.config.validatePathAccess(path, 'write');

if (error) {

throw new Error(error);

}

await fs.writeFile(path, content, 'utf-8');

}