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Просмотр файла: Terminal.d.ts
/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @format
* @oncall react_native
*/
import type {Socket} from 'net';
import type {Writable} from 'stream';
type UnderlyingStream = Socket | Writable;
/**
* We don't just print things to the console, sometimes we also want to show
* and update progress. This utility just ensures the output stays neat: no
* missing newlines, no mangled log lines.
*
* const terminal = Terminal.default;
* terminal.status('Updating... 38%');
* terminal.log('warning: Something happened.');
* terminal.status('Updating, done.');
* terminal.persistStatus();
*
* The final output:
*
* warning: Something happened.
* Updating, done.
*
* Without the status feature, we may get a mangled output:
*
* Updating... 38%warning: Something happened.
* Updating, done.
*
* This is meant to be user-readable and TTY-oriented. We use stdout by default
* because it's more about status information than diagnostics/errors (stderr).
*
* Do not add any higher-level functionality in this class such as "warning" and
* "error" printers, as it is not meant for formatting/reporting. It has the
* single responsibility of handling status messages.
*/
declare class Terminal {
constructor(stream: UnderlyingStream, opts?: {ttyPrint?: boolean});
waitForUpdates(): Promise<void>;
/**
* Useful for calling console/stdout directly after terminal logs
* Otherwise, you could end up with mangled output when the queued
* update starts writing to stream after a delay.
*/
flush(): Promise<void>;
/**
* Shows some text that is meant to be overriden later. Return the previous
* status that was shown and is no more. Calling `status()` with no argument
* removes the status altogether. The status is never shown in a
* non-interactive terminal: for example, if the output is redirected to a
* file, then we don't care too much about having a progress bar.
*/
status(format: string, ...args: Array<unknown>): string;
/**
* Similar to `console.log`, except it moves the status/progress text out of
* the way correctly. In non-interactive terminals this is the same as
* `console.log`.
*/
log(format: string, ...args: Array<unknown>): void;
/**
* Log the current status and start from scratch. This is useful if the last
* status was the last one of a series of updates.
*/
persistStatus(): void;
}
export default Terminal;
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