overcomplicated watch for "multi folder" haxe projects

start-haxe.js

const chokidar = require("chokidar");
const { spawn } = require("child_process");

const compilerPort = 6066;

// TODO:
// [ ] start compilation server
// [ ] use compilation server
// [ ] parse paths in stdout and add cwd so they can be clicked
// [ ] proper support for openfl / assets (run openfl build only when assets change)

const client = {
  sources: ["client/Sources", "common/common"],
  compile: ["openfl", "build", "html5"],
  cwd: "client",
  postBuild: () => console.log(" =====> compiled client")
};

const server = {
  sources: ["server/src", "common/common"],
  compile: ["haxe", "server.hxml"],
  cwd: "server",
  postBuild: () => console.log(" =====> compiled server")
};

const targets = { client, server };

const runThings = (targets, settings) => {
  const processes = {};

  Object.entries(targets).forEach(([targetName, buildSetting]) => {
    console.log("-----------");
    console.log(buildSetting.sources);
    chokidar
      .watch(buildSetting.sources, { ignoreInitial: true })
      .on("all", (event, path) => {
        console.log(event, path);

        const { compile, cwd, postBuild } = buildSetting;
        const [command, ...args] = compile;

        if (processes[targetName]) {
          console.log(`killing ${targetName}`);
          processes[targetName].kill();
          console.log(`killed ${targetName}`);
        }
        console.log(`starting new  ${targetName}`);
        const child = spawn(command, args, { cwd });
        processes[targetName] = child;

        child.stdout.on("data", data => {
          console.log(`[${targetName}] stdout: ${data}`);
        });

        child.stderr.on("data", data => {
          console.error(`[${targetName}] stderr: ${data}`);
        });

        child.on("close", code => {
          console.log(`[${targetName}] child process exited with code ${code}`);
          processes[targetName] = undefined;
          if (code === 0) {
            postBuild();
          }
        });
      });
  });
};

runThings(targets, { compilerPort });