initial commit

node_modules/ora/utilities.js

@@ -0,0 +1,85 @@
+import process from 'node:process';
+import readline from 'node:readline';
+import {BufferListStream} from 'bl';
+
+const ASCII_ETX_CODE = 0x03; // Ctrl+C emits this code
+
+export class StdinDiscarder {
+	#requests = 0;
+	#mutedStream = new BufferListStream();
+	#ourEmit;
+	#rl;
+
+	constructor() {
+		this.#mutedStream.pipe(process.stdout);
+
+		const self = this; // eslint-disable-line unicorn/no-this-assignment
+		this.#ourEmit = function (event, data, ...args) {
+			const {stdin} = process;
+			if (self.#requests > 0 || stdin.emit === self.#ourEmit) {
+				if (event === 'keypress') { // Fixes readline behavior
+					return;
+				}
+
+				if (event === 'data' && data.includes(ASCII_ETX_CODE)) {
+					process.emit('SIGINT');
+				}
+
+				Reflect.apply(self.#ourEmit, this, [event, data, ...args]);
+			} else {
+				Reflect.apply(process.stdin.emit, this, [event, data, ...args]);
+			}
+		};
+	}
+
+	start() {
+		this.#requests++;
+
+		if (this.#requests === 1) {
+			this._realStart();
+		}
+	}
+
+	stop() {
+		if (this.#requests <= 0) {
+			throw new Error('`stop` called more times than `start`');
+		}
+
+		this.#requests--;
+
+		if (this.#requests === 0) {
+			this._realStop();
+		}
+	}
+
+	// TODO: Use private methods when targeting Node.js 14.
+	_realStart() {
+		// No known way to make it work reliably on Windows
+		if (process.platform === 'win32') {
+			return;
+		}
+
+		this.#rl = readline.createInterface({
+			input: process.stdin,
+			output: this.#mutedStream,
+		});
+
+		this.#rl.on('SIGINT', () => {
+			if (process.listenerCount('SIGINT') === 0) {
+				process.emit('SIGINT');
+			} else {
+				this.#rl.close();
+				process.kill(process.pid, 'SIGINT');
+			}
+		});
+	}
+
+	_realStop() {
+		if (process.platform === 'win32') {
+			return;
+		}
+
+		this.#rl.close();
+		this.#rl = undefined;
+	}
+}