Merge tag 'v0.1.21' of github.com:google-gemini/gemini-cli into chore/sync-gemini-cli-v0.1.21

This commit is contained in:
mingholy.lmh
2025-08-20 22:24:50 +08:00
163 changed files with 8812 additions and 4098 deletions

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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect } from 'vitest';
import { parseAndFormatApiError } from './errorParsing.js';
import {
AuthType,
UserTierId,
DEFAULT_GEMINI_FLASH_MODEL,
isProQuotaExceededError,
} from '@qwen-code/qwen-code-core';
describe('parseAndFormatApiError', () => {
const _enterpriseMessage =
'upgrade to a Gemini Code Assist Standard or Enterprise plan with higher limits';
const vertexMessage = 'request a quota increase through Vertex';
const geminiMessage = 'request a quota increase through AI Studio';
it('should format a valid API error JSON', () => {
const errorMessage =
'got status: 400 Bad Request. {"error":{"code":400,"message":"API key not valid. Please pass a valid API key.","status":"INVALID_ARGUMENT"}}';
const expected =
'[API Error: API key not valid. Please pass a valid API key. (Status: INVALID_ARGUMENT)]';
expect(parseAndFormatApiError(errorMessage)).toBe(expected);
});
it('should format a 429 API error with the default message', () => {
const errorMessage =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Rate limit exceeded","status":"RESOURCE_EXHAUSTED"}}';
const result = parseAndFormatApiError(
errorMessage,
undefined,
undefined,
'gemini-2.5-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
expect(result).toContain('[API Error: Rate limit exceeded');
expect(result).toContain(
'Possible quota limitations in place or slow response times detected. Switching to the gemini-2.5-flash model',
);
});
it('should format a 429 API error with the personal message', () => {
const errorMessage =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Rate limit exceeded","status":"RESOURCE_EXHAUSTED"}}';
const result = parseAndFormatApiError(
errorMessage,
AuthType.LOGIN_WITH_GOOGLE,
undefined,
'gemini-2.5-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
expect(result).toContain('[API Error: Rate limit exceeded');
expect(result).toContain(
'Possible quota limitations in place or slow response times detected. Switching to the gemini-2.5-flash model',
);
});
it('should format a 429 API error with the vertex message', () => {
const errorMessage =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Rate limit exceeded","status":"RESOURCE_EXHAUSTED"}}';
const result = parseAndFormatApiError(errorMessage, AuthType.USE_VERTEX_AI);
expect(result).toContain('[API Error: Rate limit exceeded');
expect(result).toContain(vertexMessage);
});
it('should return the original message if it is not a JSON error', () => {
const errorMessage = 'This is a plain old error message';
expect(parseAndFormatApiError(errorMessage)).toBe(
`[API Error: ${errorMessage}]`,
);
});
it('should return the original message for malformed JSON', () => {
const errorMessage = '[Stream Error: {"error": "malformed}';
expect(parseAndFormatApiError(errorMessage)).toBe(
`[API Error: ${errorMessage}]`,
);
});
it('should handle JSON that does not match the ApiError structure', () => {
const errorMessage = '[Stream Error: {"not_an_error": "some other json"}]';
expect(parseAndFormatApiError(errorMessage)).toBe(
`[API Error: ${errorMessage}]`,
);
});
it('should format a nested API error', () => {
const nestedErrorMessage = JSON.stringify({
error: {
code: 429,
message:
"Gemini 2.5 Pro Preview doesn't have a free quota tier. For more information on this error, head to: https://ai.google.dev/gemini-api/docs/rate-limits.",
status: 'RESOURCE_EXHAUSTED',
},
});
const errorMessage = JSON.stringify({
error: {
code: 429,
message: nestedErrorMessage,
status: 'Too Many Requests',
},
});
const result = parseAndFormatApiError(errorMessage, AuthType.USE_GEMINI);
expect(result).toContain('Gemini 2.5 Pro Preview');
expect(result).toContain(geminiMessage);
});
it('should format a StructuredError', () => {
const error: StructuredError = {
message: 'A structured error occurred',
status: 500,
};
const expected = '[API Error: A structured error occurred]';
expect(parseAndFormatApiError(error)).toBe(expected);
});
it('should format a 429 StructuredError with the vertex message', () => {
const error: StructuredError = {
message: 'Rate limit exceeded',
status: 429,
};
const result = parseAndFormatApiError(error, AuthType.USE_VERTEX_AI);
expect(result).toContain('[API Error: Rate limit exceeded]');
expect(result).toContain(vertexMessage);
});
it('should handle an unknown error type', () => {
const error = 12345;
const expected = '[API Error: An unknown error occurred.]';
expect(parseAndFormatApiError(error)).toBe(expected);
});
it('should format a 429 API error with Pro quota exceeded message for Google auth (Free tier)', () => {
const errorMessage =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Quota exceeded for quota metric \'Gemini 2.5 Pro Requests\' and limit \'RequestsPerDay\' of service \'generativelanguage.googleapis.com\' for consumer \'project_number:123456789\'.","status":"RESOURCE_EXHAUSTED"}}';
const result = parseAndFormatApiError(
errorMessage,
AuthType.LOGIN_WITH_GOOGLE,
undefined,
'gemini-2.5-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
expect(result).toContain(
"[API Error: Quota exceeded for quota metric 'Gemini 2.5 Pro Requests'",
);
expect(result).toContain(
'You have reached your daily gemini-2.5-pro quota limit',
);
expect(result).toContain(
'upgrade to a Gemini Code Assist Standard or Enterprise plan',
);
});
it('should format a regular 429 API error with standard message for Google auth', () => {
const errorMessage =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Rate limit exceeded","status":"RESOURCE_EXHAUSTED"}}';
const result = parseAndFormatApiError(
errorMessage,
AuthType.LOGIN_WITH_GOOGLE,
undefined,
'gemini-2.5-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
expect(result).toContain('[API Error: Rate limit exceeded');
expect(result).toContain(
'Possible quota limitations in place or slow response times detected. Switching to the gemini-2.5-flash model',
);
expect(result).not.toContain(
'You have reached your daily gemini-2.5-pro quota limit',
);
});
it('should format a 429 API error with generic quota exceeded message for Google auth', () => {
const errorMessage =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Quota exceeded for quota metric \'GenerationRequests\' and limit \'RequestsPerDay\' of service \'generativelanguage.googleapis.com\' for consumer \'project_number:123456789\'.","status":"RESOURCE_EXHAUSTED"}}';
const result = parseAndFormatApiError(
errorMessage,
AuthType.LOGIN_WITH_GOOGLE,
undefined,
'gemini-2.5-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
expect(result).toContain(
"[API Error: Quota exceeded for quota metric 'GenerationRequests'",
);
expect(result).toContain('You have reached your daily quota limit');
expect(result).not.toContain(
'You have reached your daily Gemini 2.5 Pro quota limit',
);
});
it('should prioritize Pro quota message over generic quota message for Google auth', () => {
const errorMessage =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Quota exceeded for quota metric \'Gemini 2.5 Pro Requests\' and limit \'RequestsPerDay\' of service \'generativelanguage.googleapis.com\' for consumer \'project_number:123456789\'.","status":"RESOURCE_EXHAUSTED"}}';
const result = parseAndFormatApiError(
errorMessage,
AuthType.LOGIN_WITH_GOOGLE,
undefined,
'gemini-2.5-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
expect(result).toContain(
"[API Error: Quota exceeded for quota metric 'Gemini 2.5 Pro Requests'",
);
expect(result).toContain(
'You have reached your daily gemini-2.5-pro quota limit',
);
expect(result).not.toContain('You have reached your daily quota limit');
});
it('should format a 429 API error with Pro quota exceeded message for Google auth (Standard tier)', () => {
const errorMessage =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Quota exceeded for quota metric \'Gemini 2.5 Pro Requests\' and limit \'RequestsPerDay\' of service \'generativelanguage.googleapis.com\' for consumer \'project_number:123456789\'.","status":"RESOURCE_EXHAUSTED"}}';
const result = parseAndFormatApiError(
errorMessage,
AuthType.LOGIN_WITH_GOOGLE,
UserTierId.STANDARD,
'gemini-2.5-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
expect(result).toContain(
"[API Error: Quota exceeded for quota metric 'Gemini 2.5 Pro Requests'",
);
expect(result).toContain(
'You have reached your daily gemini-2.5-pro quota limit',
);
expect(result).toContain(
'We appreciate you for choosing Gemini Code Assist and the Gemini CLI',
);
expect(result).not.toContain(
'upgrade to a Gemini Code Assist Standard or Enterprise plan',
);
});
it('should format a 429 API error with Pro quota exceeded message for Google auth (Legacy tier)', () => {
const errorMessage =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Quota exceeded for quota metric \'Gemini 2.5 Pro Requests\' and limit \'RequestsPerDay\' of service \'generativelanguage.googleapis.com\' for consumer \'project_number:123456789\'.","status":"RESOURCE_EXHAUSTED"}}';
const result = parseAndFormatApiError(
errorMessage,
AuthType.LOGIN_WITH_GOOGLE,
UserTierId.LEGACY,
'gemini-2.5-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
expect(result).toContain(
"[API Error: Quota exceeded for quota metric 'Gemini 2.5 Pro Requests'",
);
expect(result).toContain(
'You have reached your daily gemini-2.5-pro quota limit',
);
expect(result).toContain(
'We appreciate you for choosing Gemini Code Assist and the Gemini CLI',
);
expect(result).not.toContain(
'upgrade to a Gemini Code Assist Standard or Enterprise plan',
);
});
it('should handle different Gemini 2.5 version strings in Pro quota exceeded errors', () => {
const errorMessage25 =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Quota exceeded for quota metric \'Gemini 2.5 Pro Requests\' and limit \'RequestsPerDay\' of service \'generativelanguage.googleapis.com\' for consumer \'project_number:123456789\'.","status":"RESOURCE_EXHAUSTED"}}';
const errorMessagePreview =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Quota exceeded for quota metric \'Gemini 2.5-preview Pro Requests\' and limit \'RequestsPerDay\' of service \'generativelanguage.googleapis.com\' for consumer \'project_number:123456789\'.","status":"RESOURCE_EXHAUSTED"}}';
const result25 = parseAndFormatApiError(
errorMessage25,
AuthType.LOGIN_WITH_GOOGLE,
undefined,
'gemini-2.5-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
const resultPreview = parseAndFormatApiError(
errorMessagePreview,
AuthType.LOGIN_WITH_GOOGLE,
undefined,
'gemini-2.5-preview-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
expect(result25).toContain(
'You have reached your daily gemini-2.5-pro quota limit',
);
expect(resultPreview).toContain(
'You have reached your daily gemini-2.5-preview-pro quota limit',
);
expect(result25).toContain(
'upgrade to a Gemini Code Assist Standard or Enterprise plan',
);
expect(resultPreview).toContain(
'upgrade to a Gemini Code Assist Standard or Enterprise plan',
);
});
it('should not match non-Pro models with similar version strings', () => {
// Test that Flash models with similar version strings don't match
expect(
isProQuotaExceededError(
"Quota exceeded for quota metric 'Gemini 2.5 Flash Requests' and limit",
),
).toBe(false);
expect(
isProQuotaExceededError(
"Quota exceeded for quota metric 'Gemini 2.5-preview Flash Requests' and limit",
),
).toBe(false);
// Test other model types
expect(
isProQuotaExceededError(
"Quota exceeded for quota metric 'Gemini 2.5 Ultra Requests' and limit",
),
).toBe(false);
expect(
isProQuotaExceededError(
"Quota exceeded for quota metric 'Gemini 2.5 Standard Requests' and limit",
),
).toBe(false);
// Test generic quota messages
expect(
isProQuotaExceededError(
"Quota exceeded for quota metric 'GenerationRequests' and limit",
),
).toBe(false);
expect(
isProQuotaExceededError(
"Quota exceeded for quota metric 'EmbeddingRequests' and limit",
),
).toBe(false);
});
it('should format a generic quota exceeded message for Google auth (Standard tier)', () => {
const errorMessage =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Quota exceeded for quota metric \'GenerationRequests\' and limit \'RequestsPerDay\' of service \'generativelanguage.googleapis.com\' for consumer \'project_number:123456789\'.","status":"RESOURCE_EXHAUSTED"}}';
const result = parseAndFormatApiError(
errorMessage,
AuthType.LOGIN_WITH_GOOGLE,
UserTierId.STANDARD,
'gemini-2.5-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
expect(result).toContain(
"[API Error: Quota exceeded for quota metric 'GenerationRequests'",
);
expect(result).toContain('You have reached your daily quota limit');
expect(result).toContain(
'We appreciate you for choosing Gemini Code Assist and the Gemini CLI',
);
expect(result).not.toContain(
'upgrade to a Gemini Code Assist Standard or Enterprise plan',
);
});
it('should format a regular 429 API error with standard message for Google auth (Standard tier)', () => {
const errorMessage =
'got status: 429 Too Many Requests. {"error":{"code":429,"message":"Rate limit exceeded","status":"RESOURCE_EXHAUSTED"}}';
const result = parseAndFormatApiError(
errorMessage,
AuthType.LOGIN_WITH_GOOGLE,
UserTierId.STANDARD,
'gemini-2.5-pro',
DEFAULT_GEMINI_FLASH_MODEL,
);
expect(result).toContain('[API Error: Rate limit exceeded');
expect(result).toContain(
'We appreciate you for choosing Gemini Code Assist and the Gemini CLI',
);
expect(result).not.toContain(
'upgrade to a Gemini Code Assist Standard or Enterprise plan',
);
});
});

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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import {
AuthType,
UserTierId,
DEFAULT_GEMINI_FLASH_MODEL,
DEFAULT_GEMINI_MODEL,
isProQuotaExceededError,
isGenericQuotaExceededError,
isApiError,
isStructuredError,
} from '@qwen-code/qwen-code-core';
// Free Tier message functions
const getRateLimitErrorMessageGoogleFree = (
fallbackModel: string = DEFAULT_GEMINI_FLASH_MODEL,
) =>
`\nPossible quota limitations in place or slow response times detected. Switching to the ${fallbackModel} model for the rest of this session.`;
const getRateLimitErrorMessageGoogleProQuotaFree = (
currentModel: string = DEFAULT_GEMINI_MODEL,
fallbackModel: string = DEFAULT_GEMINI_FLASH_MODEL,
) =>
`\nYou have reached your daily ${currentModel} quota limit. You will be switched to the ${fallbackModel} model for the rest of this session. To increase your limits, upgrade to a Gemini Code Assist Standard or Enterprise plan with higher limits at https://goo.gle/set-up-gemini-code-assist, or use /auth to switch to using a paid API key from AI Studio at https://aistudio.google.com/apikey`;
const getRateLimitErrorMessageGoogleGenericQuotaFree = () =>
`\nYou have reached your daily quota limit. To increase your limits, upgrade to a Gemini Code Assist Standard or Enterprise plan with higher limits at https://goo.gle/set-up-gemini-code-assist, or use /auth to switch to using a paid API key from AI Studio at https://aistudio.google.com/apikey`;
// Legacy/Standard Tier message functions
const getRateLimitErrorMessageGooglePaid = (
fallbackModel: string = DEFAULT_GEMINI_FLASH_MODEL,
) =>
`\nPossible quota limitations in place or slow response times detected. Switching to the ${fallbackModel} model for the rest of this session. We appreciate you for choosing Gemini Code Assist and the Gemini CLI.`;
const getRateLimitErrorMessageGoogleProQuotaPaid = (
currentModel: string = DEFAULT_GEMINI_MODEL,
fallbackModel: string = DEFAULT_GEMINI_FLASH_MODEL,
) =>
`\nYou have reached your daily ${currentModel} quota limit. You will be switched to the ${fallbackModel} model for the rest of this session. We appreciate you for choosing Gemini Code Assist and the Gemini CLI. To continue accessing the ${currentModel} model today, consider using /auth to switch to using a paid API key from AI Studio at https://aistudio.google.com/apikey`;
const getRateLimitErrorMessageGoogleGenericQuotaPaid = (
currentModel: string = DEFAULT_GEMINI_MODEL,
) =>
`\nYou have reached your daily quota limit. We appreciate you for choosing Gemini Code Assist and the Gemini CLI. To continue accessing the ${currentModel} model today, consider using /auth to switch to using a paid API key from AI Studio at https://aistudio.google.com/apikey`;
const RATE_LIMIT_ERROR_MESSAGE_USE_GEMINI =
'\nPlease wait and try again later. To increase your limits, request a quota increase through AI Studio, or switch to another /auth method';
const RATE_LIMIT_ERROR_MESSAGE_VERTEX =
'\nPlease wait and try again later. To increase your limits, request a quota increase through Vertex, or switch to another /auth method';
const getRateLimitErrorMessageDefault = (
fallbackModel: string = DEFAULT_GEMINI_FLASH_MODEL,
) =>
`\nPossible quota limitations in place or slow response times detected. Switching to the ${fallbackModel} model for the rest of this session.`;
function getRateLimitMessage(
authType?: AuthType,
error?: unknown,
userTier?: UserTierId,
currentModel?: string,
fallbackModel?: string,
): string {
switch (authType) {
case AuthType.LOGIN_WITH_GOOGLE: {
// Determine if user is on a paid tier (Legacy or Standard) - default to FREE if not specified
const isPaidTier =
userTier === UserTierId.LEGACY || userTier === UserTierId.STANDARD;
if (isProQuotaExceededError(error)) {
return isPaidTier
? getRateLimitErrorMessageGoogleProQuotaPaid(
currentModel || DEFAULT_GEMINI_MODEL,
fallbackModel,
)
: getRateLimitErrorMessageGoogleProQuotaFree(
currentModel || DEFAULT_GEMINI_MODEL,
fallbackModel,
);
} else if (isGenericQuotaExceededError(error)) {
return isPaidTier
? getRateLimitErrorMessageGoogleGenericQuotaPaid(
currentModel || DEFAULT_GEMINI_MODEL,
)
: getRateLimitErrorMessageGoogleGenericQuotaFree();
} else {
return isPaidTier
? getRateLimitErrorMessageGooglePaid(fallbackModel)
: getRateLimitErrorMessageGoogleFree(fallbackModel);
}
}
case AuthType.USE_GEMINI:
return RATE_LIMIT_ERROR_MESSAGE_USE_GEMINI;
case AuthType.USE_VERTEX_AI:
return RATE_LIMIT_ERROR_MESSAGE_VERTEX;
default:
return getRateLimitErrorMessageDefault(fallbackModel);
}
}
export function parseAndFormatApiError(
error: unknown,
authType?: AuthType,
userTier?: UserTierId,
currentModel?: string,
fallbackModel?: string,
): string {
if (isStructuredError(error)) {
let text = `[API Error: ${error.message}]`;
if (error.status === 429) {
text += getRateLimitMessage(
authType,
error,
userTier,
currentModel,
fallbackModel,
);
}
return text;
}
// The error message might be a string containing a JSON object.
if (typeof error === 'string') {
const jsonStart = error.indexOf('{');
if (jsonStart === -1) {
return `[API Error: ${error}]`; // Not a JSON error, return as is.
}
const jsonString = error.substring(jsonStart);
try {
const parsedError = JSON.parse(jsonString) as unknown;
if (isApiError(parsedError)) {
let finalMessage = parsedError.error.message;
try {
// See if the message is a stringified JSON with another error
const nestedError = JSON.parse(finalMessage) as unknown;
if (isApiError(nestedError)) {
finalMessage = nestedError.error.message;
}
} catch (_e) {
// It's not a nested JSON error, so we just use the message as is.
}
let text = `[API Error: ${finalMessage} (Status: ${parsedError.error.status})]`;
if (parsedError.error.code === 429) {
text += getRateLimitMessage(
authType,
parsedError,
userTier,
currentModel,
fallbackModel,
);
}
return text;
}
} catch (_e) {
// Not a valid JSON, fall through and return the original message.
}
return `[API Error: ${error}]`;
}
return '[API Error: An unknown error occurred.]';
}

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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
let detectionComplete = false;
let protocolSupported = false;
let protocolEnabled = false;
/**
* Detects Kitty keyboard protocol support.
* Definitive document about this protocol lives at https://sw.kovidgoyal.net/kitty/keyboard-protocol/
* This function should be called once at app startup.
*/
export async function detectAndEnableKittyProtocol(): Promise<boolean> {
if (detectionComplete) {
return protocolSupported;
}
return new Promise((resolve) => {
if (!process.stdin.isTTY || !process.stdout.isTTY) {
detectionComplete = true;
resolve(false);
return;
}
const originalRawMode = process.stdin.isRaw;
if (!originalRawMode) {
process.stdin.setRawMode(true);
}
let responseBuffer = '';
let progressiveEnhancementReceived = false;
let checkFinished = false;
const handleData = (data: Buffer) => {
responseBuffer += data.toString();
// Check for progressive enhancement response (CSI ? <flags> u)
if (responseBuffer.includes('\x1b[?') && responseBuffer.includes('u')) {
progressiveEnhancementReceived = true;
}
// Check for device attributes response (CSI ? <attrs> c)
if (responseBuffer.includes('\x1b[?') && responseBuffer.includes('c')) {
if (!checkFinished) {
checkFinished = true;
process.stdin.removeListener('data', handleData);
if (!originalRawMode) {
process.stdin.setRawMode(false);
}
if (progressiveEnhancementReceived) {
// Enable the protocol
process.stdout.write('\x1b[>1u');
protocolSupported = true;
protocolEnabled = true;
// Set up cleanup on exit
process.on('exit', disableProtocol);
process.on('SIGTERM', disableProtocol);
}
detectionComplete = true;
resolve(protocolSupported);
}
}
};
process.stdin.on('data', handleData);
// Send queries
process.stdout.write('\x1b[?u'); // Query progressive enhancement
process.stdout.write('\x1b[c'); // Query device attributes
// Timeout after 50ms
setTimeout(() => {
if (!checkFinished) {
process.stdin.removeListener('data', handleData);
if (!originalRawMode) {
process.stdin.setRawMode(false);
}
detectionComplete = true;
resolve(false);
}
}, 50);
});
}
function disableProtocol() {
if (protocolEnabled) {
process.stdout.write('\x1b[<u');
protocolEnabled = false;
}
}
export function isKittyProtocolEnabled(): boolean {
return protocolEnabled;
}
export function isKittyProtocolSupported(): boolean {
return protocolSupported;
}

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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
/**
* Terminal Platform Constants
*
* This file contains terminal-related constants used throughout the application,
* specifically for handling keyboard inputs and terminal protocols.
*/
/**
* Kitty keyboard protocol sequences for enhanced keyboard input.
* @see https://sw.kovidgoyal.net/kitty/keyboard-protocol/
*/
export const KITTY_CTRL_C = '[99;5u';
/**
* Timing constants for terminal interactions
*/
export const CTRL_EXIT_PROMPT_DURATION_MS = 1000;
/**
* VS Code terminal integration constants
*/
export const VSCODE_SHIFT_ENTER_SEQUENCE = '\\\r\n';
/**
* Backslash + Enter detection window in milliseconds.
* Used to detect Shift+Enter pattern where backslash
* is followed by Enter within this timeframe.
*/
export const BACKSLASH_ENTER_DETECTION_WINDOW_MS = 5;
/**
* Maximum expected length of a Kitty keyboard protocol sequence.
* Format: ESC [ <keycode> ; <modifiers> u/~
* Example: \x1b[13;2u (Shift+Enter) = 8 chars
* Longest reasonable: \x1b[127;15~ = 11 chars (Del with all modifiers)
* We use 12 to provide a small buffer.
*/
export const MAX_KITTY_SEQUENCE_LENGTH = 12;

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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
/**
* Terminal setup utility for configuring Shift+Enter and Ctrl+Enter support.
*
* This module provides automatic detection and configuration of various terminal
* emulators to support multiline input through modified Enter keys.
*
* Supported terminals:
* - VS Code: Configures keybindings.json to send \\\r\n
* - Cursor: Configures keybindings.json to send \\\r\n (VS Code fork)
* - Windsurf: Configures keybindings.json to send \\\r\n (VS Code fork)
*
* For VS Code and its forks:
* - Shift+Enter: Sends \\\r\n (backslash followed by CRLF)
* - Ctrl+Enter: Sends \\\r\n (backslash followed by CRLF)
*
* The module will not modify existing shift+enter or ctrl+enter keybindings
* to avoid conflicts with user customizations.
*/
import { promises as fs } from 'fs';
import * as os from 'os';
import * as path from 'path';
import { exec } from 'child_process';
import { promisify } from 'util';
import { isKittyProtocolEnabled } from './kittyProtocolDetector.js';
import { VSCODE_SHIFT_ENTER_SEQUENCE } from './platformConstants.js';
const execAsync = promisify(exec);
/**
* Removes single-line JSON comments (// ...) from a string to allow parsing
* VS Code style JSON files that may contain comments.
*/
function stripJsonComments(content: string): string {
// Remove single-line comments (// ...)
return content.replace(/^\s*\/\/.*$/gm, '');
}
export interface TerminalSetupResult {
success: boolean;
message: string;
requiresRestart?: boolean;
}
type SupportedTerminal = 'vscode' | 'cursor' | 'windsurf';
// Terminal detection
async function detectTerminal(): Promise<SupportedTerminal | null> {
const termProgram = process.env.TERM_PROGRAM;
// Check VS Code and its forks - check forks first to avoid false positives
// Check for Cursor-specific indicators
if (
process.env.CURSOR_TRACE_ID ||
process.env.VSCODE_GIT_ASKPASS_MAIN?.toLowerCase().includes('cursor')
) {
return 'cursor';
}
// Check for Windsurf-specific indicators
if (process.env.VSCODE_GIT_ASKPASS_MAIN?.toLowerCase().includes('windsurf')) {
return 'windsurf';
}
// Check VS Code last since forks may also set VSCODE env vars
if (termProgram === 'vscode' || process.env.VSCODE_GIT_IPC_HANDLE) {
return 'vscode';
}
// Check parent process name
if (os.platform() !== 'win32') {
try {
const { stdout } = await execAsync('ps -o comm= -p $PPID');
const parentName = stdout.trim();
// Check forks before VS Code to avoid false positives
if (parentName.includes('windsurf') || parentName.includes('Windsurf'))
return 'windsurf';
if (parentName.includes('cursor') || parentName.includes('Cursor'))
return 'cursor';
if (parentName.includes('code') || parentName.includes('Code'))
return 'vscode';
} catch (error) {
// Continue detection even if process check fails
console.debug('Parent process detection failed:', error);
}
}
return null;
}
// Backup file helper
async function backupFile(filePath: string): Promise<void> {
try {
const timestamp = new Date().toISOString().replace(/[:.]/g, '-');
const backupPath = `${filePath}.backup.${timestamp}`;
await fs.copyFile(filePath, backupPath);
} catch (error) {
// Log backup errors but continue with operation
console.warn(`Failed to create backup of ${filePath}:`, error);
}
}
// Helper function to get VS Code-style config directory
function getVSCodeStyleConfigDir(appName: string): string | null {
const platform = os.platform();
if (platform === 'darwin') {
return path.join(
os.homedir(),
'Library',
'Application Support',
appName,
'User',
);
} else if (platform === 'win32') {
if (!process.env.APPDATA) {
return null;
}
return path.join(process.env.APPDATA, appName, 'User');
} else {
return path.join(os.homedir(), '.config', appName, 'User');
}
}
// Generic VS Code-style terminal configuration
async function configureVSCodeStyle(
terminalName: string,
appName: string,
): Promise<TerminalSetupResult> {
const configDir = getVSCodeStyleConfigDir(appName);
if (!configDir) {
return {
success: false,
message: `Could not determine ${terminalName} config path on Windows: APPDATA environment variable is not set.`,
};
}
const keybindingsFile = path.join(configDir, 'keybindings.json');
try {
await fs.mkdir(configDir, { recursive: true });
let keybindings: unknown[] = [];
try {
const content = await fs.readFile(keybindingsFile, 'utf8');
await backupFile(keybindingsFile);
try {
const cleanContent = stripJsonComments(content);
const parsedContent = JSON.parse(cleanContent);
if (!Array.isArray(parsedContent)) {
return {
success: false,
message:
`${terminalName} keybindings.json exists but is not a valid JSON array. ` +
`Please fix the file manually or delete it to allow automatic configuration.\n` +
`File: ${keybindingsFile}`,
};
}
keybindings = parsedContent;
} catch (parseError) {
return {
success: false,
message:
`Failed to parse ${terminalName} keybindings.json. The file contains invalid JSON.\n` +
`Please fix the file manually or delete it to allow automatic configuration.\n` +
`File: ${keybindingsFile}\n` +
`Error: ${parseError}`,
};
}
} catch {
// File doesn't exist, will create new one
}
const shiftEnterBinding = {
key: 'shift+enter',
command: 'workbench.action.terminal.sendSequence',
when: 'terminalFocus',
args: { text: VSCODE_SHIFT_ENTER_SEQUENCE },
};
const ctrlEnterBinding = {
key: 'ctrl+enter',
command: 'workbench.action.terminal.sendSequence',
when: 'terminalFocus',
args: { text: VSCODE_SHIFT_ENTER_SEQUENCE },
};
// Check if ANY shift+enter or ctrl+enter bindings already exist
const existingShiftEnter = keybindings.find((kb) => {
const binding = kb as { key?: string };
return binding.key === 'shift+enter';
});
const existingCtrlEnter = keybindings.find((kb) => {
const binding = kb as { key?: string };
return binding.key === 'ctrl+enter';
});
if (existingShiftEnter || existingCtrlEnter) {
const messages: string[] = [];
if (existingShiftEnter) {
messages.push(`- Shift+Enter binding already exists`);
}
if (existingCtrlEnter) {
messages.push(`- Ctrl+Enter binding already exists`);
}
return {
success: false,
message:
`Existing keybindings detected. Will not modify to avoid conflicts.\n` +
messages.join('\n') +
'\n' +
`Please check and modify manually if needed: ${keybindingsFile}`,
};
}
// Check if our specific bindings already exist
const hasOurShiftEnter = keybindings.some((kb) => {
const binding = kb as {
command?: string;
args?: { text?: string };
key?: string;
};
return (
binding.key === 'shift+enter' &&
binding.command === 'workbench.action.terminal.sendSequence' &&
binding.args?.text === '\\\r\n'
);
});
const hasOurCtrlEnter = keybindings.some((kb) => {
const binding = kb as {
command?: string;
args?: { text?: string };
key?: string;
};
return (
binding.key === 'ctrl+enter' &&
binding.command === 'workbench.action.terminal.sendSequence' &&
binding.args?.text === '\\\r\n'
);
});
if (!hasOurShiftEnter || !hasOurCtrlEnter) {
if (!hasOurShiftEnter) keybindings.unshift(shiftEnterBinding);
if (!hasOurCtrlEnter) keybindings.unshift(ctrlEnterBinding);
await fs.writeFile(keybindingsFile, JSON.stringify(keybindings, null, 4));
return {
success: true,
message: `Added Shift+Enter and Ctrl+Enter keybindings to ${terminalName}.\nModified: ${keybindingsFile}`,
requiresRestart: true,
};
} else {
return {
success: true,
message: `${terminalName} keybindings already configured.`,
};
}
} catch (error) {
return {
success: false,
message: `Failed to configure ${terminalName}.\nFile: ${keybindingsFile}\nError: ${error}`,
};
}
}
// Terminal-specific configuration functions
async function configureVSCode(): Promise<TerminalSetupResult> {
return configureVSCodeStyle('VS Code', 'Code');
}
async function configureCursor(): Promise<TerminalSetupResult> {
return configureVSCodeStyle('Cursor', 'Cursor');
}
async function configureWindsurf(): Promise<TerminalSetupResult> {
return configureVSCodeStyle('Windsurf', 'Windsurf');
}
/**
* Main terminal setup function that detects and configures the current terminal.
*
* This function:
* 1. Detects the current terminal emulator
* 2. Applies appropriate configuration for Shift+Enter and Ctrl+Enter support
* 3. Creates backups of configuration files before modifying them
*
* @returns Promise<TerminalSetupResult> Result object with success status and message
*
* @example
* const result = await terminalSetup();
* if (result.success) {
* console.log(result.message);
* if (result.requiresRestart) {
* console.log('Please restart your terminal');
* }
* }
*/
export async function terminalSetup(): Promise<TerminalSetupResult> {
// Check if terminal already has optimal keyboard support
if (isKittyProtocolEnabled()) {
return {
success: true,
message:
'Your terminal is already configured for an optimal experience with multiline input (Shift+Enter and Ctrl+Enter).',
};
}
const terminal = await detectTerminal();
if (!terminal) {
return {
success: false,
message:
'Could not detect terminal type. Supported terminals: VS Code, Cursor, and Windsurf.',
};
}
switch (terminal) {
case 'vscode':
return configureVSCode();
case 'cursor':
return configureCursor();
case 'windsurf':
return configureWindsurf();
default:
return {
success: false,
message: `Terminal "${terminal}" is not supported yet.`,
};
}
}