import { writeFileSync, readFileSync } from "fs";
import { template } from "lodash";

/**
 * post build step to insert code files into code files.
 * And the package.json version.
 */
cp("src/fs/package.json", "lib/fs/package.json");
cp("src/fs/bootstrap.js", "lib/fs/bootstrap.js");
cp("src/fs/README.md", "lib/fs/README.md");

inject("lib/patches/third-party-main.js");
inject("lib/steps/shim.js");
inject("lib/options.js", JSON.stringify(require("../package.json").version));

function inject(filename: string, version?: string) {
  const contents = template(readFileSync(filename, "utf8"), {
    interpolate: /['"]\{\{([\s\S]*?)\}\}['"]/,
  })({
    file: (path: string) => JSON.stringify(readFileSync(path, "utf8")),
    version,
  });
  writeFileSync(filename, contents);
  console.log(`Wrote: ${filename}`);
}

function cp(from: string, to: string) {
  const file = readFileSync(from);
  writeFileSync(to, file);
  console.log("Copied: ", from, "To: ", to);
}