@sap/cds-dk/lib/mtx/download_legacy.js

Command line client and development toolkit for the SAP Cloud Application Programming Model

const fs = require('fs');
const { join } = require('path');

const { login } = require('./auth_manager');

const { mtxFetch } = require('./util/request');

const DOWNLOAD_FILE_NAME = 'migrated_projects.tgz'; // TODO try to add tenant later, if possible

module.exports = class Download {

    static async run(paramValues) {
        const params = await login(paramValues);

        const projectFolder = params.get('projectFolder');
        const downloadPath = join(projectFolder, DOWNLOAD_FILE_NAME);

        if (fs.existsSync(downloadPath) && !(await require('./util/question').askBooleanQuestion(`File ${DOWNLOAD_FILE_NAME} already exists. Continue (yN)? `, false, false))) {
            console.log('Download cancelled');
            return;
        }

        console.log(`Downloading migrated @sap/mtx extension project(s)`);
        const downloadedTgz = await this.pullTgz(params);
        await fs.promises.writeFile(downloadPath, downloadedTgz);

        console.log(`Finished.`);
    }

    static async pullTgz(params) {
        const tagRule = params.get('tagRule');
        const defaultTag = params.get('defaultTag');
        const downloadUrl = `${(params.get('appUrl'))}/-/cds/extensibility/getMigratedProjects`;
        const reqAuth = params.get('reqAuth') || {};
        const headers = { 'content-type': 'application/json', ...reqAuth.headers };

        const response = await mtxFetch('POST', downloadUrl, {
            headers,
            body: JSON.stringify({ tagRule, defaultTag })
        }, params);
        return Buffer.from(await response.arrayBuffer());
    }
}