Super hacky script to delazy your swift files to decrease compile time.

delazy.js

//
// Hacky script to convert lazy loaded closures into private instance functions
// The script ignores Pods, Carthage and build folders, and only looks for
// .swift files
// This doesn't work on all cases, and may break things. Be warned ⚠️
//
// Usage:
//      node delazy.js <folder path>
//

String.prototype.capitalizeFirstLetter = function() {
    return this.charAt(0).toUpperCase() + this.slice(1);
}
String.prototype.contains = function(it) { return this.indexOf(it) != -1; };


var fs = require('fs');

var folder

process.argv.forEach(function (val, index, array) {
  console.log(index + ': ' + val);
  if (index == 2) { folder = val }
});


var fs = require('fs');
var walk = function(dir, done) {
  var results = [];
  fs.readdir(dir, function(err, list) {
    if (err) return done(err);
    var i = 0;
    (function next() {
      var file = list[i++];
      if (!file) return done(null, results);
      file = dir + '/' + file;
      fs.stat(file, function(err, stat) {
        if (stat && stat.isDirectory()) {
          walk(file, function(err, res) {
            results = results.concat(res);
            next();
          });
        } else {
          results.push(file);
          next();
        }
      });
    })();
  });
};

walk(folder, function(err, files) {

  var s = files.filter(function(element, i) {
    if (element.contains('.git') || element.contains('Carthage') || element.contains('Pods')|| element.contains('build')|| element.contains('fastlane')) {
      return false
    }

    if (element.contains('.swift')) {
      return true
    }

    return false
  })

  // console.log(s);
  console.log('Found ' + s.length + ' files');

  s.forEach(function(val, index) {
    console.log('processing ' + val)
    processFile(val)
  })


})


function processFile(path) {
  var contents = fs.readFileSync(path).toString();

  var lines = contents.split('\n')
  // console.log("lines: " + lines.length);

  for (i in lines) {
    var line = lines[i]

    if (line.match(/lazy var.*= {/)) {
      // console.log('Found lazy var on line ' + i + ' \'' + line + '\'')

      var isPrivate = false
      if (line.match(/private lazy var.*= {/)) {
        isPrivate = true
      }

      var j = i
      while (lines[j]) {
        if (lines[j].match(/}\(\)/)) {
          // console.log('Found closing statement on line ' + j)
          break
        }
        j++
      }

      var variableNameIndex = isPrivate ? 3 : 2
      var variableTypeIndex = isPrivate ? 4 : 3

      // Now we have the start line in 'i' + the end line in 'j'

      // lets parse the start line to get the variable
      var startLine = lines[i]

      var variableName = startLine.trim().split(' ')[variableNameIndex]
      variableName = variableName.substr(0, variableName.length - 1)

      var variableType = startLine.trim().split(' ')[variableTypeIndex]

      // If the variable type contains generics, skip it as we don't support that

      if (variableType.contains('<')) {
        console.log("Skipping due to generics")
        continue
      }

      // console.log(variableName + ' ' + variableType)

      // Calculate the function name
      var functionName = 'create' + variableName.capitalizeFirstLetter()
      var newVariableLineStart = isPrivate ? '    private lazy var ' : '    lazy var '
      var newVariableLine = newVariableLineStart + variableName + ': ' + variableType + ' = self.' + functionName + '()'
      // console.log(functionName)
      // console.log(newVariableLine)

      // Calculate the second line
      var createFunction = '    private func ' + functionName + '() -> ' + variableType + ' {'
      // console.log(createFunction)

      // Create the last line for the closure
      var lastLine = '    }'

      // Replace all the lines
      lines[i] = newVariableLine
      i++
      lines.splice(i, 0, createFunction)
      j++
      lines[j] = lastLine
    }

  }

  file = lines.join('\n')

  var contents = fs.writeFileSync(path, file)
}