How to use krl-compiler - 5 common examples

require('util.promisify/shim')()
let PicoEngineCore = require('pico-engine-core')
let leveljs = require('level-js')
let levelup = require('levelup')
let fs = require('fs')
let krlCompiler = require('krl-compiler')
let krlCompilerVersion = require('krl-compiler/package.json').version
let crypto = require('crypto')

/* eslint-disable */
let builtInRulesets = [
  {
    src: fs.readFileSync(__dirname + '/../../pico-engine/krl/io.picolabs.wrangler.krl', 'utf8'),
    meta: { url: 'pico-engine.js/io.picolabs.wrangler.krl' }
  },
  {
    src: fs.readFileSync(__dirname + '/../../pico-engine/krl/io.picolabs.visual_params.krl', 'utf8'),
    meta: { url: 'pico-engine.js/io.picolabs.visual_params.krl' }
  },
  {
    src: fs.readFileSync(__dirname + '/../../pico-engine/krl/io.picolabs.subscription.krl', 'utf8'),
    meta: { url: 'pico-engine.js/io.picolabs.subscription.krl' }
  }

import * as fs from "fs";
import leveldown from "leveldown";
import { default as level, LevelUp } from "levelup";
import * as makeDir from "make-dir";
import * as path from "path";
import { Ruleset } from "pico-framework";
const krlCompiler = require("krl-compiler");
const krlCompilerVersion = require("krl-compiler/package.json").version;
const charwise = require("charwise");
const encode = require("encoding-down");
const safeJsonCodec = require("level-json-coerce-null");

function normalizeVersion(version: string) {
  if (typeof version !== "string") {
    version = "";
  }
  version = version.trim().toLowerCase();
  if (version === "") {
    version = "draft";
  }
  if (version === "draft") {
    return version;
  }
  const isDraft = /draft$/.test(version);

var fs = require("fs");
var path = require("path");
var mkdirp = require("mkdirp");
var compiler = require("krl-compiler");
var version_key = [
    require("pico-engine-core/package.json").version,
    require("krl-compiler/package.json").version
].join("-");

var fsExist = function(file_path, callback){
    fs.stat(file_path, function(err, stats){
        if(err){
            if(err.code === "ENOENT"){
                return callback(undefined, false);
            }else{
                return callback(err);
            }
        }
        callback(undefined, true);
    });
};

var storeFile = function(file_path, src, callback){

var fs = require("fs");
var path = require("path");
var mkdirp = require("mkdirp");
var compiler = require("krl-compiler");

var version_key = require("../package.json").version + "-" + require("krl-compiler/package.json").version;

var fsExist = function(file_path, callback){
  fs.stat(file_path, function(err, stats){
    if(err){
      if(err.code === "ENOENT"){
        return callback(undefined, false);
      }else{
        return callback(err);
      }
    }
    callback(undefined, true);
  });
};

var storeFile = function(file_path, src, callback){
  mkdirp(path.dirname(file_path), function(err){

var _ = require('lodash')
var fs = require('fs')
var util = require('util')
var path = require('path')
var mkdirp = require('mkdirp')
var compiler = require('krl-compiler')
var versionKey = [
  require('pico-engine-core/package.json').version,
  require('krl-compiler/package.json').version
].join('-')

var fsExist = function (filePath, callback) {
  fs.stat(filePath, function (err, stats) {
    if (err) {
      if (err.code === 'ENOENT') {
        return callback(null, false)
      } else {
        return callback(err)
      }
    }
    callback(null, true)
  })
}

var storeFile = function (filePath, src, callback) {