/**
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* The `repl` module provides a Read-Eval-Print-Loop (REPL) implementation that
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* is available both as a standalone program or includible in other applications.
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* It can be accessed using:
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*
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* ```js
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* const repl = require('repl');
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* ```
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* @see [source](https://github.com/nodejs/node/blob/v18.0.0/lib/repl.js)
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*/
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declare module 'repl' {
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import { Interface, Completer, AsyncCompleter } from 'node:readline';
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import { Context } from 'node:vm';
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import { InspectOptions } from 'node:util';
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interface ReplOptions {
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/**
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* The input prompt to display.
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* @default "> "
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*/
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prompt?: string | undefined;
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/**
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* The `Readable` stream from which REPL input will be read.
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* @default process.stdin
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*/
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input?: NodeJS.ReadableStream | undefined;
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/**
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* The `Writable` stream to which REPL output will be written.
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* @default process.stdout
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*/
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output?: NodeJS.WritableStream | undefined;
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/**
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* If `true`, specifies that the output should be treated as a TTY terminal, and have
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* ANSI/VT100 escape codes written to it.
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* Default: checking the value of the `isTTY` property on the output stream upon
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* instantiation.
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*/
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terminal?: boolean | undefined;
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/**
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* The function to be used when evaluating each given line of input.
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* Default: an async wrapper for the JavaScript `eval()` function. An `eval` function can
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* error with `repl.Recoverable` to indicate the input was incomplete and prompt for
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* additional lines.
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*
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* @see https://nodejs.org/dist/latest-v10.x/docs/api/repl.html#repl_default_evaluation
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* @see https://nodejs.org/dist/latest-v10.x/docs/api/repl.html#repl_custom_evaluation_functions
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*/
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eval?: REPLEval | undefined;
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/**
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* Defines if the repl prints output previews or not.
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* @default `true` Always `false` in case `terminal` is falsy.
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*/
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preview?: boolean | undefined;
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/**
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* If `true`, specifies that the default `writer` function should include ANSI color
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* styling to REPL output. If a custom `writer` function is provided then this has no
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* effect.
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* Default: the REPL instance's `terminal` value.
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*/
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useColors?: boolean | undefined;
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/**
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* If `true`, specifies that the default evaluation function will use the JavaScript
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* `global` as the context as opposed to creating a new separate context for the REPL
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* instance. The node CLI REPL sets this value to `true`.
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* Default: `false`.
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*/
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useGlobal?: boolean | undefined;
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/**
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* If `true`, specifies that the default writer will not output the return value of a
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* command if it evaluates to `undefined`.
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* Default: `false`.
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*/
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ignoreUndefined?: boolean | undefined;
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/**
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* The function to invoke to format the output of each command before writing to `output`.
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* Default: a wrapper for `util.inspect`.
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*
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* @see https://nodejs.org/dist/latest-v10.x/docs/api/repl.html#repl_customizing_repl_output
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*/
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writer?: REPLWriter | undefined;
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/**
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* An optional function used for custom Tab auto completion.
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*
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* @see https://nodejs.org/dist/latest-v11.x/docs/api/readline.html#readline_use_of_the_completer_function
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*/
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completer?: Completer | AsyncCompleter | undefined;
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/**
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* A flag that specifies whether the default evaluator executes all JavaScript commands in
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* strict mode or default (sloppy) mode.
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* Accepted values are:
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* - `repl.REPL_MODE_SLOPPY` - evaluates expressions in sloppy mode.
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* - `repl.REPL_MODE_STRICT` - evaluates expressions in strict mode. This is equivalent to
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* prefacing every repl statement with `'use strict'`.
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*/
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replMode?: typeof REPL_MODE_SLOPPY | typeof REPL_MODE_STRICT | undefined;
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/**
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* Stop evaluating the current piece of code when `SIGINT` is received, i.e. `Ctrl+C` is
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* pressed. This cannot be used together with a custom `eval` function.
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* Default: `false`.
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*/
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breakEvalOnSigint?: boolean | undefined;
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}
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type REPLEval = (this: REPLServer, evalCmd: string, context: Context, file: string, cb: (err: Error | null, result: any) => void) => void;
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type REPLWriter = (this: REPLServer, obj: any) => string;
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/**
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* This is the default "writer" value, if none is passed in the REPL options,
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* and it can be overridden by custom print functions.
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*/
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const writer: REPLWriter & {
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options: InspectOptions;
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};
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type REPLCommandAction = (this: REPLServer, text: string) => void;
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interface REPLCommand {
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/**
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* Help text to be displayed when `.help` is entered.
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*/
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help?: string | undefined;
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/**
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* The function to execute, optionally accepting a single string argument.
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*/
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action: REPLCommandAction;
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}
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/**
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* Instances of `repl.REPLServer` are created using the {@link start} method
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* or directly using the JavaScript `new` keyword.
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*
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* ```js
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* const repl = require('repl');
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*
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* const options = { useColors: true };
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*
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* const firstInstance = repl.start(options);
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* const secondInstance = new repl.REPLServer(options);
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* ```
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* @since v0.1.91
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*/
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class REPLServer extends Interface {
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/**
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* The `vm.Context` provided to the `eval` function to be used for JavaScript
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* evaluation.
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*/
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readonly context: Context;
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/**
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* @deprecated since v14.3.0 - Use `input` instead.
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*/
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readonly inputStream: NodeJS.ReadableStream;
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/**
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* @deprecated since v14.3.0 - Use `output` instead.
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*/
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readonly outputStream: NodeJS.WritableStream;
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/**
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* The `Readable` stream from which REPL input will be read.
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*/
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readonly input: NodeJS.ReadableStream;
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/**
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* The `Writable` stream to which REPL output will be written.
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*/
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readonly output: NodeJS.WritableStream;
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/**
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* The commands registered via `replServer.defineCommand()`.
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*/
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readonly commands: NodeJS.ReadOnlyDict<REPLCommand>;
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/**
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* A value indicating whether the REPL is currently in "editor mode".
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*
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* @see https://nodejs.org/dist/latest-v10.x/docs/api/repl.html#repl_commands_and_special_keys
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*/
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readonly editorMode: boolean;
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/**
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* A value indicating whether the `_` variable has been assigned.
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*
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* @see https://nodejs.org/dist/latest-v10.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
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*/
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readonly underscoreAssigned: boolean;
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/**
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* The last evaluation result from the REPL (assigned to the `_` variable inside of the REPL).
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*
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* @see https://nodejs.org/dist/latest-v10.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
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*/
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readonly last: any;
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/**
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* A value indicating whether the `_error` variable has been assigned.
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*
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* @since v9.8.0
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* @see https://nodejs.org/dist/latest-v10.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
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*/
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readonly underscoreErrAssigned: boolean;
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/**
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* The last error raised inside the REPL (assigned to the `_error` variable inside of the REPL).
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*
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* @since v9.8.0
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* @see https://nodejs.org/dist/latest-v10.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
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*/
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readonly lastError: any;
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/**
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* Specified in the REPL options, this is the function to be used when evaluating each
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* given line of input. If not specified in the REPL options, this is an async wrapper
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* for the JavaScript `eval()` function.
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*/
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readonly eval: REPLEval;
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/**
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* Specified in the REPL options, this is a value indicating whether the default
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* `writer` function should include ANSI color styling to REPL output.
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*/
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readonly useColors: boolean;
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/**
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* Specified in the REPL options, this is a value indicating whether the default `eval`
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* function will use the JavaScript `global` as the context as opposed to creating a new
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* separate context for the REPL instance.
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*/
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readonly useGlobal: boolean;
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/**
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* Specified in the REPL options, this is a value indicating whether the default `writer`
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* function should output the result of a command if it evaluates to `undefined`.
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*/
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readonly ignoreUndefined: boolean;
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/**
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* Specified in the REPL options, this is the function to invoke to format the output of
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* each command before writing to `outputStream`. If not specified in the REPL options,
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* this will be a wrapper for `util.inspect`.
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*/
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readonly writer: REPLWriter;
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/**
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* Specified in the REPL options, this is the function to use for custom Tab auto-completion.
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*/
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readonly completer: Completer | AsyncCompleter;
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/**
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* Specified in the REPL options, this is a flag that specifies whether the default `eval`
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* function should execute all JavaScript commands in strict mode or default (sloppy) mode.
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* Possible values are:
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* - `repl.REPL_MODE_SLOPPY` - evaluates expressions in sloppy mode.
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* - `repl.REPL_MODE_STRICT` - evaluates expressions in strict mode. This is equivalent to
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* prefacing every repl statement with `'use strict'`.
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*/
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readonly replMode: typeof REPL_MODE_SLOPPY | typeof REPL_MODE_STRICT;
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/**
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* NOTE: According to the documentation:
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*
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* > Instances of `repl.REPLServer` are created using the `repl.start()` method and
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* > _should not_ be created directly using the JavaScript `new` keyword.
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*
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* `REPLServer` cannot be subclassed due to implementation specifics in NodeJS.
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*
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* @see https://nodejs.org/dist/latest-v10.x/docs/api/repl.html#repl_class_replserver
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*/
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private constructor();
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/**
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* The `replServer.defineCommand()` method is used to add new `.`\-prefixed commands
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* to the REPL instance. Such commands are invoked by typing a `.` followed by the`keyword`. The `cmd` is either a `Function` or an `Object` with the following
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* properties:
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*
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* The following example shows two new commands added to the REPL instance:
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*
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* ```js
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* const repl = require('repl');
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*
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* const replServer = repl.start({ prompt: '> ' });
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* replServer.defineCommand('sayhello', {
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* help: 'Say hello',
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* action(name) {
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* this.clearBufferedCommand();
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* console.log(`Hello, ${name}!`);
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* this.displayPrompt();
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* }
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* });
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* replServer.defineCommand('saybye', function saybye() {
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* console.log('Goodbye!');
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* this.close();
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* });
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* ```
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*
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* The new commands can then be used from within the REPL instance:
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*
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* ```console
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* > .sayhello Node.js User
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* Hello, Node.js User!
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* > .saybye
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* Goodbye!
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* ```
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* @since v0.3.0
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* @param keyword The command keyword (_without_ a leading `.` character).
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* @param cmd The function to invoke when the command is processed.
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*/
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defineCommand(keyword: string, cmd: REPLCommandAction | REPLCommand): void;
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/**
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* The `replServer.displayPrompt()` method readies the REPL instance for input
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* from the user, printing the configured `prompt` to a new line in the `output`and resuming the `input` to accept new input.
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*
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* When multi-line input is being entered, an ellipsis is printed rather than the
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* 'prompt'.
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*
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* When `preserveCursor` is `true`, the cursor placement will not be reset to `0`.
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*
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* The `replServer.displayPrompt` method is primarily intended to be called from
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* within the action function for commands registered using the`replServer.defineCommand()` method.
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* @since v0.1.91
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*/
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displayPrompt(preserveCursor?: boolean): void;
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/**
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* The `replServer.clearBufferedCommand()` method clears any command that has been
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* buffered but not yet executed. This method is primarily intended to be
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* called from within the action function for commands registered using the`replServer.defineCommand()` method.
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* @since v9.0.0
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*/
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clearBufferedCommand(): void;
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/**
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* Initializes a history log file for the REPL instance. When executing the
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* Node.js binary and using the command-line REPL, a history file is initialized
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* by default. However, this is not the case when creating a REPL
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* programmatically. Use this method to initialize a history log file when working
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* with REPL instances programmatically.
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* @since v11.10.0
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* @param historyPath the path to the history file
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* @param callback called when history writes are ready or upon error
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*/
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setupHistory(path: string, callback: (err: Error | null, repl: this) => void): void;
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/**
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* events.EventEmitter
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* 1. close - inherited from `readline.Interface`
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* 2. line - inherited from `readline.Interface`
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* 3. pause - inherited from `readline.Interface`
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* 4. resume - inherited from `readline.Interface`
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* 5. SIGCONT - inherited from `readline.Interface`
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* 6. SIGINT - inherited from `readline.Interface`
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* 7. SIGTSTP - inherited from `readline.Interface`
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* 8. exit
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* 9. reset
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*/
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addListener(event: string, listener: (...args: any[]) => void): this;
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addListener(event: 'close', listener: () => void): this;
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addListener(event: 'line', listener: (input: string) => void): this;
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addListener(event: 'pause', listener: () => void): this;
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addListener(event: 'resume', listener: () => void): this;
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addListener(event: 'SIGCONT', listener: () => void): this;
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addListener(event: 'SIGINT', listener: () => void): this;
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addListener(event: 'SIGTSTP', listener: () => void): this;
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addListener(event: 'exit', listener: () => void): this;
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addListener(event: 'reset', listener: (context: Context) => void): this;
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emit(event: string | symbol, ...args: any[]): boolean;
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emit(event: 'close'): boolean;
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emit(event: 'line', input: string): boolean;
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emit(event: 'pause'): boolean;
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emit(event: 'resume'): boolean;
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emit(event: 'SIGCONT'): boolean;
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emit(event: 'SIGINT'): boolean;
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emit(event: 'SIGTSTP'): boolean;
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emit(event: 'exit'): boolean;
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emit(event: 'reset', context: Context): boolean;
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on(event: string, listener: (...args: any[]) => void): this;
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on(event: 'close', listener: () => void): this;
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on(event: 'line', listener: (input: string) => void): this;
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on(event: 'pause', listener: () => void): this;
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on(event: 'resume', listener: () => void): this;
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on(event: 'SIGCONT', listener: () => void): this;
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on(event: 'SIGINT', listener: () => void): this;
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on(event: 'SIGTSTP', listener: () => void): this;
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on(event: 'exit', listener: () => void): this;
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on(event: 'reset', listener: (context: Context) => void): this;
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once(event: string, listener: (...args: any[]) => void): this;
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once(event: 'close', listener: () => void): this;
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once(event: 'line', listener: (input: string) => void): this;
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once(event: 'pause', listener: () => void): this;
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once(event: 'resume', listener: () => void): this;
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once(event: 'SIGCONT', listener: () => void): this;
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once(event: 'SIGINT', listener: () => void): this;
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once(event: 'SIGTSTP', listener: () => void): this;
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once(event: 'exit', listener: () => void): this;
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once(event: 'reset', listener: (context: Context) => void): this;
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prependListener(event: string, listener: (...args: any[]) => void): this;
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prependListener(event: 'close', listener: () => void): this;
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prependListener(event: 'line', listener: (input: string) => void): this;
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prependListener(event: 'pause', listener: () => void): this;
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prependListener(event: 'resume', listener: () => void): this;
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prependListener(event: 'SIGCONT', listener: () => void): this;
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prependListener(event: 'SIGINT', listener: () => void): this;
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prependListener(event: 'SIGTSTP', listener: () => void): this;
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prependListener(event: 'exit', listener: () => void): this;
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prependListener(event: 'reset', listener: (context: Context) => void): this;
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prependOnceListener(event: string, listener: (...args: any[]) => void): this;
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prependOnceListener(event: 'close', listener: () => void): this;
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prependOnceListener(event: 'line', listener: (input: string) => void): this;
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prependOnceListener(event: 'pause', listener: () => void): this;
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prependOnceListener(event: 'resume', listener: () => void): this;
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prependOnceListener(event: 'SIGCONT', listener: () => void): this;
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prependOnceListener(event: 'SIGINT', listener: () => void): this;
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prependOnceListener(event: 'SIGTSTP', listener: () => void): this;
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prependOnceListener(event: 'exit', listener: () => void): this;
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prependOnceListener(event: 'reset', listener: (context: Context) => void): this;
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}
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/**
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* A flag passed in the REPL options. Evaluates expressions in sloppy mode.
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*/
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const REPL_MODE_SLOPPY: unique symbol;
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/**
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* A flag passed in the REPL options. Evaluates expressions in strict mode.
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* This is equivalent to prefacing every repl statement with `'use strict'`.
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*/
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const REPL_MODE_STRICT: unique symbol;
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/**
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* The `repl.start()` method creates and starts a {@link REPLServer} instance.
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*
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* If `options` is a string, then it specifies the input prompt:
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*
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* ```js
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* const repl = require('repl');
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*
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* // a Unix style prompt
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* repl.start('$ ');
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* ```
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* @since v0.1.91
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*/
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function start(options?: string | ReplOptions): REPLServer;
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/**
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* Indicates a recoverable error that a `REPLServer` can use to support multi-line input.
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*
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* @see https://nodejs.org/dist/latest-v10.x/docs/api/repl.html#repl_recoverable_errors
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*/
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class Recoverable extends SyntaxError {
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err: Error;
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constructor(err: Error);
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}
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}
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declare module 'node:repl' {
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export * from 'repl';
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}
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