PEM Certificate parser for C/C++

instructions.md

deno run --allow-read \
  https://gist.githubusercontent.com/gbaranski/733e5ddba8a5d3e56a476ba96264fdce/raw/f22038fcb3f04ab59ef34a1a336e4c21236c0287/pem_parser.ts \
  <path-to-cert>

pem_parser.ts

import { red, green, magenta } from "https://deno.land/std/fmt/colors.ts";

const certPath = Deno.args[0];
if (!certPath)
  throw new Error(
    red(
      `You need to pass first argument to file, eg ${magenta(
        "deno run index.ts cert.pem"
      )}`
    )
  );

const parse = (e: string) => `\t"${e}\\n"`; // \t is needed only for parsing it to
const parseLastLine = (e: string) => `\t"${e}"`;

const text = await Deno.readTextFile(certPath);
const parsed = text
  .trim() // Remove whitespaces
  .split("\n") // Split by newline
  .map((e, i, a) => (i + 1 === a.length ? parseLastLine(e) : parse(e))) // Parse it
  .join("\n"); // Join all together

const code = `
${magenta(`const char *${red("certificate")} =`)}
${green(parsed)};
`;
console.log(code);