Manually generating an Angular SCAM

LICENSE

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2004 Sam Hocevar <[email protected]>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

scam.js

#!/usr/bin/env node

const { execSync } = require('child_process');
const { readFileSync, writeFileSync, unlinkSync } = require('fs');
const { basename, resolve } = require('path');
const { argv, exit } = require('process');

const rootPath = execSync('npm prefix').toString().trim();
console.log(`(i) assuming root path as ${rootPath}`);
const appArgs = argv.slice(2);

if (appArgs.length !== 2) {
    console.error('(!) incorrect args');
    console.error('please pass in the desired schematic, and path to file');
    console.error('example: npm run scam c src/app/sample/sample-foobar');
    exit(1);
}

const [genType, genPath] = appArgs;
const ngGenPath = genPath.replace('src/app/', '');

let command = `npx ng generate module ${ngGenPath} --flat=false`

console.log('(i) dry run to capture Angular path')
const moduleCreatedLog = execSync(`${command} --dry-run=true`).toString().trim();
const moduleFilePath = moduleCreatedLog.split(' ')[1];
console.log(`(i) captured path "${moduleFilePath}"`);

console.log(`(i) running > ${command}`);
execSync(command, { stdio: 'inherit' });

command = `npx ng generate ${genType} ${ngGenPath} --flat=false --module=${moduleFilePath.replace('src/app/', '')}`
console.log(`(i) running > ${command}`);
execSync(command, { stdio: 'inherit' });

const moduleFileContent = readFileSync(moduleFilePath, { encoding: 'utf8' });

let moduleFileNgModule = '@NgModule' + moduleFileContent.split('@NgModule').pop();
moduleFileNgModule = moduleFileNgModule.replace(/( +declarations: \[.+?\],)/s, (match) =>
    [match, match.replace('declarations', 'exports')].join('\n')
);

const guessFilenameRegex = moduleFileContent.match(/import { .+? } from '\.\/(.+?)';/);
if (guessFilenameRegex.length !== 2) {
    console.error('(!) error guessing generated filename');
    console.error('guessed', guessFilenameRegex);
    exit(1);
}

const guessFilename = guessFilenameRegex[1];
const genFilePath = resolve(rootPath, moduleFilePath, '..', `${guessFilename}.ts`);
const genFileContent = readFileSync(genFilePath, { encoding: 'utf8' });

const finalContent = [
    ...moduleFileContent.split('\n').filter((line) => line.startsWith('import') && !line.includes(guessFilename)),
    genFileContent,
    moduleFileNgModule,
];

writeFileSync(genFilePath, finalContent.join('\n'));
console.log(`(i) moved module declaration into ${guessFilename}.ts file`);

unlinkSync(moduleFilePath);
console.log(`(i) deleted unused ${basename(moduleFilePath)} file`);
console.log(`(i) done, please optimize the imports manually in ${guessFilename}.ts`);