postage

#! /usr/bin/env node
const yargs = require("yargs");
const main = require("./main");

const args = yargs
  .scriptName("postage")
  .version()
  .pkgConf("postage")
  .option("no-overwrite", {
    boolean: true,
    describe: "Terminates process rather than overwriting old target path",
    default: false
  })
  .option("use-file", {
    describe: "Use provided file as `package.json`",
    default: "package.json"
  })
  .option("omit", {
    alias: "o",
    array: true,
    string: true,
    describe: "Omit certain keys/sub-keys from the output package.json",
    example: "--omit=scripts -o=contributors",
    default: [""]
  })
  .option("include", {
    alias: "i",
    array: true,
    string: true,
    describe: "Include keys/sub-keys in the output package.json",
    example: "--include=eslint -i=scripts.start,scripts.test",
    default: [""]
  })
  .option("indent", {
    string: true,
    alias: "n",
    default: "tab",
    choices: ["2", "4", "tab"]
  }).argv;

const indent = (function(arg) {
  if (arg === "tab") return "\t";
  if (arg === "4") return "    ";
  return "  ";
})(args.indent);

const files = require("./files")(args._[0] || "dist");

async function execute() {
  const package_json = await files.readPackage(args["use-file"]);
  const publish_ready_package_json = main(package_json, {
    indent,
    include: args["include"].reduce(flattenKeySets, []),
    omit: args["omit"].reduce(flattenKeySets, [])
  });

  await files.writePackage(publish_ready_package_json);
  await files.copyFilesFrom(process.cwd());
}

/**
 * @param {string[]} acc
 * @param {string} csv
 * @returns {string[]}
 */
function flattenKeySets(acc, csv) {
  return acc.concat(csv.split(","));
}

execute().catch(err => {
  console.error(err);
  process.exit(1);
});