yarn-frozen-dependencies/sources/operation-reporters/confirm.operation-reporter.ts

A yarn plugin who freeze the workspace dependencies to prevent undesired updates.

import {createInterface} from "readline";
import {ReportError, MessageName, formatUtils} from '@yarnpkg/core';
import {OperationReporter} from "./operation-reporter";

export class ConfirmOperationReporter extends OperationReporter {
    async reportOperation(): Promise<void> {
        const {operation, target, formattedFields, workspace: {project: {configuration}}} = this;

        const confirmText = formatUtils.pretty(configuration, formatUtils.applyStyle(configuration, 'Confirm:', 2), 'yellow');
        const message = formatUtils.pretty(configuration, `${confirmText} you will ${operation} ${formattedFields.dependency} but ${target} are indicated as sealed in ${formattedFields.workspace}. Are you sure? [y/N]`, 'blue');

        if (!await this.askConfirmation(message)) {
            this.abortOperation();
        }
    }

    protected askConfirmation = async (message: string): Promise<boolean> => {
        const readlineInterface = createInterface({input: process.stdin, output: process.stdout, terminal: true});

        const confirmation: boolean = await new Promise(resolve => {
            readlineInterface.question(message, (answer) => {
                resolve(/^(yes|y|1)$/i.test(answer.trim()));
            });
        });
        readlineInterface.close();

        return confirmation;
    }

    protected abortOperation = (): void => {
        const error = new ReportError(MessageName.UNNAMED, 'Operation aborted!');
        error.stack = undefined;
        throw error;
    }

}