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source dump of claude code
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2.3 kB · 68 lines
TypeScript
at main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869function handleEPIPE( stream: NodeJS.WriteStream,): (err: NodeJS.ErrnoException) => void { return (err: NodeJS.ErrnoException) => { if (err.code === 'EPIPE') { stream.destroy() } }}
// Prevents memory leak when pipe is broken (e.g., `claude -p | head -1`)export function registerProcessOutputErrorHandlers(): void { process.stdout.on('error', handleEPIPE(process.stdout)) process.stderr.on('error', handleEPIPE(process.stderr))}
function writeOut(stream: NodeJS.WriteStream, data: string): void { if (stream.destroyed) { return }
// Note: we don't handle backpressure (write() returning false). // // We should consider handling the callback to ensure we wait for data to flush. stream.write(data /* callback to handle here */)}
export function writeToStdout(data: string): void { writeOut(process.stdout, data)}
export function writeToStderr(data: string): void { writeOut(process.stderr, data)}
// Write error to stderr and exit with code 1. Consolidates the// console.error + process.exit(1) pattern used in entrypoint fast-paths.export function exitWithError(message: string): never { // biome-ignore lint/suspicious/noConsole:: intentional console output console.error(message) // eslint-disable-next-line custom-rules/no-process-exit process.exit(1)}
// Wait for a stdin-like stream to close, but give up after ms if no data ever// arrives. First data chunk cancels the timeout — after that, wait for end// unconditionally (caller's accumulator needs all chunks, not just the first).// Returns true on timeout, false on end. Used by -p mode to distinguish a// real pipe producer from an inherited-but-idle parent stdin.export function peekForStdinData( stream: NodeJS.EventEmitter, ms: number,): Promise<boolean> { return new Promise<boolean>(resolve => { const done = (timedOut: boolean) => { clearTimeout(peek) stream.off('end', onEnd) stream.off('data', onFirstData) void resolve(timedOut) } const onEnd = () => done(false) const onFirstData = () => clearTimeout(peek) // eslint-disable-next-line no-restricted-syntax -- not a sleep: races timeout against stream end/data events const peek = setTimeout(done, ms, true) stream.once('end', onEnd) stream.once('data', onFirstData) })}