install.js

"use strict";
const EXCLUDED_FILES = [
  ".DS_Store",
  "README.md",
  ".gitignore",
  ".git",
  "install.js",
  "osx_config.sh",
  "Brewfile"
];
const fs = require("fs");
const readline = require("readline");
const exec = require("child_process").exec;

const rl = readline.createInterface(process.stdin, process.stdout);
const files = fs.readdirSync(__dirname).filter(file => !~EXCLUDED_FILES.indexOf(file));

iterate(files, 0);

// iterate recursively over files, allowing blocking prompt between files
function iterate(files, index, overwrite) {
  const file = files[index];
  if (undefined === file) {
    console.log("\nDone ☕️");
    console.log("Run osx_config.sh to configure OSX");
    process.exit(0);
  }
  const target = process.env["HOME"] + "/." + file;

  // exception means file doesn't exist
  let fileExists = false;
  try {
    fs.accessSync(target, fs.F_OK);
    fileExists = true;
  } catch (e) {
    fileExists = false;
  }

  if (fileExists && !overwrite) {
    rl.question(target + " already exists. Overwrite? [yNaq] ", answer => {
      if (answer === "y") {
        linkFile(file);
      } else if (answer === "a") {
        linkFile(file);
        overwrite = true;
      } else if (answer === "q") {
        process.exit(0);
      } else {
        console.log("Skipping ." + file);
      }
      iterate(files, index + 1, overwrite);
    });
  } else {
    linkFile(file);
    iterate(files, index + 1, overwrite);
  }
}

function linkFile(file) {
  console.log("linking file ." + file);
  const target = process.env["HOME"] + "/." + file;
  // unlink the file preemptively, just catch errors for non-existent files
  rmFile(target);
  fs.symlinkSync(__dirname + "/" + file, target);
}

function rmFile(target) {
  let stat;
  try {
    stat = fs.lstatSync(target);
  } catch (e) {
    // ignore non-existent files
    if (e.code === "ENOENT") {
      return;
    }
  }
  return stat.isDirectory() ? rmDir(target) : fs.unlinkSync(target);
}

// recursively remove directory
function rmDir(path) {
  fs.readdirSync(path).forEach((file, index) => {
    const curPath = path + "/" + file;
    if (fs.lstatSync(curPath).isDirectory()) {
      return rmDir(curPath);
    }
    fs.unlinkSync(curPath);
  });
  return fs.rmdirSync(path);
}