@scurrlin/stencil/dist/src/index.js

A memorization tool that strips code down to first letters and punctuation only.

import fs from 'node:fs';
import readline from 'node:readline';
export async function transformFile(filePath, options = {}) {
    const { startLine = null, endLine = null } = options;
    if (!fs.existsSync(filePath)) {
        throw new Error(`File not found: ${filePath}`);
    }
    const fileStream = fs.createReadStream(filePath, { encoding: 'utf-8' });
    fileStream.on('error', (err) => {
        throw new Error(`Unable to read file: ${err.message}`);
    });
    const rl = readline.createInterface({
        input: fileStream,
        crlfDelay: Infinity
    });
    let currentLine = 0;
    const transformedLines = [];
    for await (const line of rl) {
        currentLine++;
        if ((startLine === null || currentLine >= startLine) &&
            (endLine === null || currentLine <= endLine)) {
            transformedLines.push(transformLine(line));
        }
        else {
            transformedLines.push(line);
        }
    }
    return transformedLines.join('\n');
}
export function transformLine(line) {
    // \p{L} matches any kind of letter from any language
    // \p{N} matches any kind of numeric character
    return line.replace(/[\p{L}\p{N}]+/gu, (match) => {
        return match[0];
    });
}