oppi.li
source dump of claude code
1import { openSync } from 'fs'
2import { ReadStream } from 'tty'
3import type { RenderOptions } from '../ink.js'
4import { isEnvTruthy } from './envUtils.js'
5import { logError } from './log.js'
6
7// Cached stdin override - computed once per process
8let cachedStdinOverride: ReadStream | undefined | null = null
9
10/**
11 * Gets a ReadStream for /dev/tty when stdin is piped.
12 * This allows interactive Ink rendering even when stdin is a pipe.
13 * Result is cached for the lifetime of the process.
14 */
15function getStdinOverride(): ReadStream | undefined {
16 // Return cached result if already computed
17 if (cachedStdinOverride !== null) {
18 return cachedStdinOverride
19 }
20
21 // No override needed if stdin is already a TTY
22 if (process.stdin.isTTY) {
23 cachedStdinOverride = undefined
24 return undefined
25 }
26
27 // Skip in CI environments
28 if (isEnvTruthy(process.env.CI)) {
29 cachedStdinOverride = undefined
30 return undefined
31 }
32
33 // Skip if running MCP (input hijacking breaks MCP)
34 if (process.argv.includes('mcp')) {
35 cachedStdinOverride = undefined
36 return undefined
37 }
38
39 // No /dev/tty on Windows
40 if (process.platform === 'win32') {
41 cachedStdinOverride = undefined
42 return undefined
43 }
44
45 // Try to open /dev/tty as an alternative input source
46 try {
47 const ttyFd = openSync('/dev/tty', 'r')
48 const ttyStream = new ReadStream(ttyFd)
49 // Explicitly set isTTY to true since we know /dev/tty is a TTY.
50 // This is needed because some runtimes (like Bun's compiled binaries)
51 // may not correctly detect isTTY on ReadStream created from a file descriptor.
52 ttyStream.isTTY = true
53 cachedStdinOverride = ttyStream
54 return cachedStdinOverride
55 } catch (err) {
56 logError(err as Error)
57 cachedStdinOverride = undefined
58 return undefined
59 }
60}
61
62/**
63 * Returns base render options for Ink, including stdin override when needed.
64 * Use this for all render() calls to ensure piped input works correctly.
65 *
66 * @param exitOnCtrlC - Whether to exit on Ctrl+C (usually false for dialogs)
67 */
68export function getBaseRenderOptions(
69 exitOnCtrlC: boolean = false,
70): RenderOptions {
71 const stdin = getStdinOverride()
72 const options: RenderOptions = { exitOnCtrlC }
73 if (stdin) {
74 options.stdin = stdin
75 }
76 return options
77}