From 6d70832ee11f2e772c83f6a2b35fc25feab7df2e Mon Sep 17 00:00:00 2001
From: Amin Yahyaabadi <aminyahyaabadi74@gmail.com>
Date: Sat, 3 Apr 2021 21:28:49 -0500
Subject: [PATCH 1/7] Automatic decaffeinate

```
decaffeinate  --loose --optional-chaining .\src
```
---
 src/deprecation.coffee |  93 -----------------------------
 src/deprecation.js     | 131 +++++++++++++++++++++++++++++++++++++++++
 src/grim.coffee        |  88 ---------------------------
 src/grim.js            | 110 ++++++++++++++++++++++++++++++++++
 4 files changed, 241 insertions(+), 181 deletions(-)
 delete mode 100644 src/deprecation.coffee
 create mode 100644 src/deprecation.js
 delete mode 100644 src/grim.coffee
 create mode 100644 src/grim.js

diff --git a/src/deprecation.coffee b/src/deprecation.coffee
deleted file mode 100644
index 4fa4603..0000000
--- a/src/deprecation.coffee
+++ /dev/null
@@ -1,93 +0,0 @@
-SourceMapCache = {}
-
-module.exports =
-class Deprecation
-  @getFunctionNameFromCallsite: (callsite) ->
-
-  @deserialize: ({message, fileName, lineNumber, stacks}) ->
-    deprecation = new Deprecation(message, fileName, lineNumber)
-    deprecation.addStack(stack, stack.metadata) for stack in stacks
-    deprecation
-
-  constructor: (@message, @fileName, @lineNumber) ->
-    @callCount = 0
-    @stackCount = 0
-    @stacks = {}
-    @stackCallCounts = {}
-
-  getFunctionNameFromCallsite: (callsite) ->
-    return callsite.functionName if callsite.functionName?
-
-    if callsite.isToplevel()
-      callsite.getFunctionName() ? '<unknown>'
-    else
-      if callsite.isConstructor()
-        "new #{callsite.getFunctionName()}"
-      else if callsite.getMethodName() and not callsite.getFunctionName()
-        callsite.getMethodName()
-      else
-        "#{callsite.getTypeName()}.#{callsite.getMethodName() ? callsite.getFunctionName() ? '<anonymous>'}"
-
-  getLocationFromCallsite: (callsite) ->
-    return "unknown" unless callsite?
-    return callsite.location if callsite.location?
-
-    if callsite.isNative()
-      "native"
-    else if callsite.isEval()
-      "eval at #{@getLocationFromCallsite(callsite.getEvalOrigin())}"
-    else
-      fileName = callsite.getFileName()
-      line = callsite.getLineNumber()
-      column = callsite.getColumnNumber()
-      "#{fileName}:#{line}:#{column}"
-
-  getFileNameFromCallSite: (callsite) ->
-    callsite.fileName ? callsite.getFileName()
-
-  getOriginName: ->
-    @originName
-
-  getMessage: ->
-    @message
-
-  getStacks: ->
-    parsedStacks = []
-    for location, stack of @stacks
-      parsedStack = @parseStack(stack)
-      parsedStack.callCount = @stackCallCounts[location]
-      parsedStack.metadata = stack.metadata
-      parsedStacks.push(parsedStack)
-    parsedStacks
-
-  getStackCount: ->
-    @stackCount
-
-  getCallCount: ->
-    @callCount
-
-  addStack: (stack, metadata) ->
-    @originName ?= @getFunctionNameFromCallsite(stack[0])
-    @fileName ?= @getFileNameFromCallSite(stack[0])
-    @lineNumber ?= stack[0].getLineNumber?()
-    @callCount++
-
-    stack.metadata = metadata
-    callerLocation = @getLocationFromCallsite(stack[1])
-    unless @stacks[callerLocation]?
-      @stacks[callerLocation] = stack
-      @stackCount++
-    @stackCallCounts[callerLocation] ?= 0
-    @stackCallCounts[callerLocation]++
-
-  parseStack: (stack) ->
-    stack.map (callsite) =>
-      functionName: @getFunctionNameFromCallsite(callsite)
-      location: @getLocationFromCallsite(callsite)
-      fileName: @getFileNameFromCallSite(callsite)
-
-  serialize: ->
-    message: @getMessage()
-    lineNumber: @lineNumber
-    fileName: @fileName
-    stacks: @getStacks()
diff --git a/src/deprecation.js b/src/deprecation.js
new file mode 100644
index 0000000..655b739
--- /dev/null
+++ b/src/deprecation.js
@@ -0,0 +1,131 @@
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS104: Avoid inline assignments
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+let Deprecation;
+const SourceMapCache = {};
+
+module.exports =
+(Deprecation = class Deprecation {
+  static getFunctionNameFromCallsite(callsite) {}
+
+  static deserialize({message, fileName, lineNumber, stacks}) {
+    const deprecation = new Deprecation(message, fileName, lineNumber);
+    for (let stack of stacks) { deprecation.addStack(stack, stack.metadata); }
+    return deprecation;
+  }
+
+  constructor(message, fileName, lineNumber) {
+    this.message = message;
+    this.fileName = fileName;
+    this.lineNumber = lineNumber;
+    this.callCount = 0;
+    this.stackCount = 0;
+    this.stacks = {};
+    this.stackCallCounts = {};
+  }
+
+  getFunctionNameFromCallsite(callsite) {
+    if (callsite.functionName != null) { return callsite.functionName; }
+
+    if (callsite.isToplevel()) {
+      let left;
+      return (left = callsite.getFunctionName()) != null ? left : '<unknown>';
+    } else {
+      if (callsite.isConstructor()) {
+        return `new ${callsite.getFunctionName()}`;
+      } else if (callsite.getMethodName() && !callsite.getFunctionName()) {
+        return callsite.getMethodName();
+      } else {
+        let left1, left2;
+        return `${callsite.getTypeName()}.${(left1 = (left2 = callsite.getMethodName()) != null ? left2 : callsite.getFunctionName()) != null ? left1 : '<anonymous>'}`;
+      }
+    }
+  }
+
+  getLocationFromCallsite(callsite) {
+    if (callsite == null) { return "unknown"; }
+    if (callsite.location != null) { return callsite.location; }
+
+    if (callsite.isNative()) {
+      return "native";
+    } else if (callsite.isEval()) {
+      return `eval at ${this.getLocationFromCallsite(callsite.getEvalOrigin())}`;
+    } else {
+      const fileName = callsite.getFileName();
+      const line = callsite.getLineNumber();
+      const column = callsite.getColumnNumber();
+      return `${fileName}:${line}:${column}`;
+    }
+  }
+
+  getFileNameFromCallSite(callsite) {
+    return callsite.fileName != null ? callsite.fileName : callsite.getFileName();
+  }
+
+  getOriginName() {
+    return this.originName;
+  }
+
+  getMessage() {
+    return this.message;
+  }
+
+  getStacks() {
+    const parsedStacks = [];
+    for (let location in this.stacks) {
+      const stack = this.stacks[location];
+      const parsedStack = this.parseStack(stack);
+      parsedStack.callCount = this.stackCallCounts[location];
+      parsedStack.metadata = stack.metadata;
+      parsedStacks.push(parsedStack);
+    }
+    return parsedStacks;
+  }
+
+  getStackCount() {
+    return this.stackCount;
+  }
+
+  getCallCount() {
+    return this.callCount;
+  }
+
+  addStack(stack, metadata) {
+    if (this.originName == null) { this.originName = this.getFunctionNameFromCallsite(stack[0]); }
+    if (this.fileName == null) { this.fileName = this.getFileNameFromCallSite(stack[0]); }
+    if (this.lineNumber == null) { this.lineNumber = stack[0].getLineNumber?.(); }
+    this.callCount++;
+
+    stack.metadata = metadata;
+    const callerLocation = this.getLocationFromCallsite(stack[1]);
+    if (this.stacks[callerLocation] == null) {
+      this.stacks[callerLocation] = stack;
+      this.stackCount++;
+    }
+    if (this.stackCallCounts[callerLocation] == null) { this.stackCallCounts[callerLocation] = 0; }
+    return this.stackCallCounts[callerLocation]++;
+  }
+
+  parseStack(stack) {
+    return stack.map(callsite => {
+      return {
+        functionName: this.getFunctionNameFromCallsite(callsite),
+        location: this.getLocationFromCallsite(callsite),
+        fileName: this.getFileNameFromCallSite(callsite)
+      };
+    });
+  }
+
+  serialize() {
+    return {
+      message: this.getMessage(),
+      lineNumber: this.lineNumber,
+      fileName: this.fileName,
+      stacks: this.getStacks()
+    };
+  }
+});
diff --git a/src/grim.coffee b/src/grim.coffee
deleted file mode 100644
index da3cf66..0000000
--- a/src/grim.coffee
+++ /dev/null
@@ -1,88 +0,0 @@
-Deprecation = require './deprecation'
-
-unless global.__grim__?
-  {Emitter} = require 'event-kit'
-  grim = global.__grim__ =
-    deprecations: {}
-    emitter: new Emitter
-    includeDeprecatedAPIs: true
-
-    getDeprecations: ->
-      deprecations = []
-      for fileName, deprecationsByLineNumber of grim.deprecations
-        for lineNumber, deprecationsByPackage of deprecationsByLineNumber
-          for packageName, deprecation of deprecationsByPackage
-            deprecations.push(deprecation)
-      deprecations
-
-    getDeprecationsLength: ->
-      @getDeprecations().length
-
-    clearDeprecations: ->
-      grim.deprecations = {}
-      return
-
-    logDeprecations: ->
-      deprecations = @getDeprecations()
-      deprecations.sort (a, b) -> b.getCallCount() - a.getCallCount()
-
-      console.warn "\nCalls to deprecated functions\n-----------------------------"
-      for deprecation in deprecations
-        console.warn "(#{deprecation.getCallCount()}) #{deprecation.getOriginName()} : #{deprecation.getMessage()}", deprecation
-      return
-
-    deprecate: (message, metadata) ->
-      # Capture a 5-deep stack trace
-      originalStackTraceLimit = Error.stackTraceLimit
-      try
-        Error.stackTraceLimit = 7
-        error = new Error
-        # Get an array of v8 CallSite objects
-        stack = error.getRawStack?() ? getRawStack(error)
-        stack = stack.slice(1)
-      finally
-        Error.stackTraceLimit = originalStackTraceLimit
-
-      # Find or create a deprecation for this site
-      deprecationSite = stack[0]
-      fileName = deprecationSite.getFileName()
-      lineNumber = deprecationSite.getLineNumber()
-      packageName = metadata?.packageName ? ""
-      grim.deprecations[fileName] ?= {}
-      grim.deprecations[fileName][lineNumber] ?= {}
-      grim.deprecations[fileName][lineNumber][packageName] ?= new Deprecation(message)
-
-      deprecation = grim.deprecations[fileName][lineNumber][packageName]
-
-      # Add the current stack trace to the deprecation
-      deprecation.addStack(stack, metadata)
-      grim.emitter.emit("updated", deprecation)
-      return
-
-    addSerializedDeprecation: (serializedDeprecation) ->
-      deprecation = Deprecation.deserialize(serializedDeprecation)
-      message = deprecation.getMessage()
-      {fileName, lineNumber} = deprecation
-      stacks = deprecation.getStacks()
-      packageName = stacks[0]?.metadata?.packageName ? ""
-
-      grim.deprecations[fileName] ?= {}
-      grim.deprecations[fileName][lineNumber] ?= {}
-      grim.deprecations[fileName][lineNumber][packageName] ?= new Deprecation(message, fileName, lineNumber)
-
-      deprecation = grim.deprecations[fileName][lineNumber][packageName]
-      deprecation.addStack(stack, stack.metadata) for stack in stacks
-      grim.emitter.emit("updated", deprecation)
-      return
-
-    on: (eventName, callback) -> grim.emitter.on(eventName, callback)
-
-getRawStack = (error) ->
-  originalPrepareStackTrace = Error.prepareStackTrace
-  Error.prepareStackTrace = (error, stack) -> stack
-  Error.captureStackTrace(error, getRawStack)
-  result = error.stack
-  Error.prepareStackTrace = originalPrepareStackTrace
-  result
-
-module.exports = global.__grim__
diff --git a/src/grim.js b/src/grim.js
new file mode 100644
index 0000000..2af2468
--- /dev/null
+++ b/src/grim.js
@@ -0,0 +1,110 @@
+/*
+ * decaffeinate suggestions:
+ * DS102: Remove unnecessary code created because of implicit returns
+ * DS104: Avoid inline assignments
+ * DS207: Consider shorter variations of null checks
+ * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
+ */
+const Deprecation = require('./deprecation');
+
+if (global.__grim__ == null) {
+  const {Emitter} = require('event-kit');
+  var grim = (global.__grim__ = {
+    deprecations: {},
+    emitter: new Emitter,
+    includeDeprecatedAPIs: true,
+
+    getDeprecations() {
+      const deprecations = [];
+      for (let fileName in grim.deprecations) {
+        const deprecationsByLineNumber = grim.deprecations[fileName];
+        for (let lineNumber in deprecationsByLineNumber) {
+          const deprecationsByPackage = deprecationsByLineNumber[lineNumber];
+          for (let packageName in deprecationsByPackage) {
+            const deprecation = deprecationsByPackage[packageName];
+            deprecations.push(deprecation);
+          }
+        }
+      }
+      return deprecations;
+    },
+
+    getDeprecationsLength() {
+      return this.getDeprecations().length;
+    },
+
+    clearDeprecations() {
+      grim.deprecations = {};
+    },
+
+    logDeprecations() {
+      const deprecations = this.getDeprecations();
+      deprecations.sort((a, b) => b.getCallCount() - a.getCallCount());
+
+      console.warn("\nCalls to deprecated functions\n-----------------------------");
+      for (let deprecation of deprecations) {
+        console.warn(`(${deprecation.getCallCount()}) ${deprecation.getOriginName()} : ${deprecation.getMessage()}`, deprecation);
+      }
+    },
+
+    deprecate(message, metadata) {
+      // Capture a 5-deep stack trace
+      let stack;
+      const originalStackTraceLimit = Error.stackTraceLimit;
+      try {
+        let left;
+        Error.stackTraceLimit = 7;
+        const error = new Error;
+        // Get an array of v8 CallSite objects
+        stack = (left = error.getRawStack?.()) != null ? left : getRawStack(error);
+        stack = stack.slice(1);
+      } finally {
+        Error.stackTraceLimit = originalStackTraceLimit;
+      }
+
+      // Find or create a deprecation for this site
+      const deprecationSite = stack[0];
+      const fileName = deprecationSite.getFileName();
+      const lineNumber = deprecationSite.getLineNumber();
+      const packageName = metadata?.packageName != null ? metadata?.packageName : "";
+      if (grim.deprecations[fileName] == null) { grim.deprecations[fileName] = {}; }
+      if (grim.deprecations[fileName][lineNumber] == null) { grim.deprecations[fileName][lineNumber] = {}; }
+      if (grim.deprecations[fileName][lineNumber][packageName] == null) { grim.deprecations[fileName][lineNumber][packageName] = new Deprecation(message); }
+
+      const deprecation = grim.deprecations[fileName][lineNumber][packageName];
+
+      // Add the current stack trace to the deprecation
+      deprecation.addStack(stack, metadata);
+      grim.emitter.emit("updated", deprecation);
+    },
+
+    addSerializedDeprecation(serializedDeprecation) {
+      let deprecation = Deprecation.deserialize(serializedDeprecation);
+      const message = deprecation.getMessage();
+      const {fileName, lineNumber} = deprecation;
+      const stacks = deprecation.getStacks();
+      const packageName = stacks[0]?.metadata?.packageName != null ? stacks[0]?.metadata?.packageName : "";
+
+      if (grim.deprecations[fileName] == null) { grim.deprecations[fileName] = {}; }
+      if (grim.deprecations[fileName][lineNumber] == null) { grim.deprecations[fileName][lineNumber] = {}; }
+      if (grim.deprecations[fileName][lineNumber][packageName] == null) { grim.deprecations[fileName][lineNumber][packageName] = new Deprecation(message, fileName, lineNumber); }
+
+      deprecation = grim.deprecations[fileName][lineNumber][packageName];
+      for (let stack of stacks) { deprecation.addStack(stack, stack.metadata); }
+      grim.emitter.emit("updated", deprecation);
+    },
+
+    on(eventName, callback) { return grim.emitter.on(eventName, callback); }
+  });
+}
+
+var getRawStack = function(error) {
+  const originalPrepareStackTrace = Error.prepareStackTrace;
+  Error.prepareStackTrace = (error, stack) => stack;
+  Error.captureStackTrace(error, getRawStack);
+  const result = error.stack;
+  Error.prepareStackTrace = originalPrepareStackTrace;
+  return result;
+};
+
+module.exports = global.__grim__;

From 56259d9122e60ad93ac2eadc31a4fe7b55d590de Mon Sep 17 00:00:00 2001
From: Amin Yahyaabadi <aminyahyaabadi74@gmail.com>
Date: Sat, 3 Apr 2021 21:20:28 -0500
Subject: [PATCH 2/7] Fix Deprecation export

---
 src/deprecation.js | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/deprecation.js b/src/deprecation.js
index 655b739..c8b67c6 100644
--- a/src/deprecation.js
+++ b/src/deprecation.js
@@ -5,11 +5,10 @@
  * DS207: Consider shorter variations of null checks
  * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
  */
-let Deprecation;
-const SourceMapCache = {};
+const SourceMapCache = {}
 
 module.exports =
-(Deprecation = class Deprecation {
+class Deprecation {
   static getFunctionNameFromCallsite(callsite) {}
 
   static deserialize({message, fileName, lineNumber, stacks}) {
@@ -128,4 +127,4 @@ module.exports =
       stacks: this.getStacks()
     };
   }
-});
+};

From 3dcf1e56539e13a0b598860c7a38a658d28cf6d2 Mon Sep 17 00:00:00 2001
From: Amin Yahyaabadi <aminyahyaabadi74@gmail.com>
Date: Sat, 3 Apr 2021 21:23:10 -0500
Subject: [PATCH 3/7] Use npm scripts + directly use jasmine-node and
 coffeelint

---
 Gruntfile.coffee        | 44 -----------------------------------------
 package.json            | 21 ++++++++++----------
 spec/spec-helper.coffee |  1 -
 3 files changed, 10 insertions(+), 56 deletions(-)
 delete mode 100644 Gruntfile.coffee
 delete mode 100644 spec/spec-helper.coffee

diff --git a/Gruntfile.coffee b/Gruntfile.coffee
deleted file mode 100644
index 61ba29f..0000000
--- a/Gruntfile.coffee
+++ /dev/null
@@ -1,44 +0,0 @@
-path = require('path')
-
-module.exports = (grunt) ->
-
-  grunt.initConfig
-    pkg: grunt.file.readJSON('package.json')
-
-    coffee:
-      glob_to_multiple:
-        expand: true
-        cwd: 'src'
-        src: ['**/*.coffee']
-        dest: 'lib'
-        ext: '.js'
-
-    coffeelint:
-      options:
-        no_empty_param_list:
-          level: 'error'
-        max_line_length:
-          level: 'ignore'
-        indentation:
-          level: 'ignore'
-
-      src: ['src/*.coffee']
-      test: ['spec/*.coffee']
-      gruntfile: ['Gruntfile.coffee']
-
-    shell:
-      test:
-        command: "#{path.normalize('node_modules/.bin/jasmine-focused')} --coffee --captureExceptions --forceexit spec"
-        options:
-          stdout: true
-          stderr: true
-          failOnError: true
-
-  grunt.loadNpmTasks('grunt-contrib-coffee')
-  grunt.loadNpmTasks('grunt-shell')
-  grunt.loadNpmTasks('grunt-coffeelint')
-
-  grunt.registerTask 'clean', -> require('rimraf').sync('lib')
-  grunt.registerTask('lint', ['coffeelint'])
-  grunt.registerTask('default', ['coffee', 'lint'])
-  grunt.registerTask('test', ['coffee', 'lint', 'shell:test'])
diff --git a/package.json b/package.json
index c404367..f9d07f4 100644
--- a/package.json
+++ b/package.json
@@ -4,8 +4,8 @@
   "description": "Log usage of deprecated methods",
   "main": "./lib/grim",
   "scripts": {
-    "prepublish": "grunt clean lint coffee",
-    "test": "grunt test"
+    "lint": "coffeelint .",
+    "test": "jasmine-node --coffee --captureExceptions --forceexit spec"
   },
   "repository": {
     "type": "git",
@@ -24,15 +24,14 @@
     "event-kit": "^2.0.0"
   },
   "devDependencies": {
-    "coffee-script": "^1.7.0",
-    "jasmine-focused": "^1.0.4",
-    "grunt-contrib-coffee": "^0.9.0",
-    "grunt-cli": "^0.1.8",
-    "grunt": "^0.4.1",
-    "grunt-shell": "^0.2.2",
-    "grunt-coffeelint": "^0.0.6",
-    "rimraf": "^2.2.2",
-    "coffee-cache": "^0.2.0",
+    "coffeelint": "^2.1.0",
+    "jasmine-node": "^3.0.0",
     "temp": "^0.6.0"
+  },
+  "coffeelintConfig": {
+    "max_line_length": {
+      "level": "error",
+      "value": 120
+    }
   }
 }
diff --git a/spec/spec-helper.coffee b/spec/spec-helper.coffee
deleted file mode 100644
index 725b542..0000000
--- a/spec/spec-helper.coffee
+++ /dev/null
@@ -1 +0,0 @@
-require 'coffee-cache'

From 9dd96e98061b141878e4527d0dff450ffd158012 Mon Sep 17 00:00:00 2001
From: Amin Yahyaabadi <aminyahyaabadi74@gmail.com>
Date: Sat, 3 Apr 2021 23:38:58 -0500
Subject: [PATCH 4/7] Add babel to compile optional chaining

---
 babel.config.json     | 6 ++++++
 package.json          | 6 +++++-
 spec/grim-spec.coffee | 4 ++--
 3 files changed, 13 insertions(+), 3 deletions(-)
 create mode 100644 babel.config.json

diff --git a/babel.config.json b/babel.config.json
new file mode 100644
index 0000000..75386f4
--- /dev/null
+++ b/babel.config.json
@@ -0,0 +1,6 @@
+{
+  "presets": ["babel-preset-atomic"],
+  "plugins": [],
+  "exclude": "node_modules/**",
+  "sourceMap": "inline"
+}
diff --git a/package.json b/package.json
index f9d07f4..75cb234 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,10 @@
   "main": "./lib/grim",
   "scripts": {
     "lint": "coffeelint .",
-    "test": "jasmine-node --coffee --captureExceptions --forceexit spec"
+    "test": "npm run build && jasmine-node --coffee --captureExceptions --forceexit spec",
+    "dev": "npm run build -- --watch",
+    "build": " babel src --out-dir lib --delete-dir-on-start",
+    "prepare": "npm run build"
   },
   "repository": {
     "type": "git",
@@ -24,6 +27,7 @@
     "event-kit": "^2.0.0"
   },
   "devDependencies": {
+    "babel-preset-atomic": "^4.1.0",
     "coffeelint": "^2.1.0",
     "jasmine-node": "^3.0.0",
     "temp": "^0.6.0"
diff --git a/spec/grim-spec.coffee b/spec/grim-spec.coffee
index 3319031..4620d13 100644
--- a/spec/grim-spec.coffee
+++ b/spec/grim-spec.coffee
@@ -1,5 +1,5 @@
-grim = require '../src/grim'
-Deprecation = require '../src/deprecation'
+grim = require '../lib/grim'
+Deprecation = require '../lib/deprecation'
 
 describe "Grim", ->
   beforeEach ->

From 209730bc847690ffd3f8db3f8c7e99e55ca83b67 Mon Sep 17 00:00:00 2001
From: Amin Yahyaabadi <aminyahyaabadi74@gmail.com>
Date: Sat, 3 Apr 2021 23:40:38 -0500
Subject: [PATCH 5/7] Use es6 import/export

---
 src/deprecation.js | 3 +--
 src/grim.js        | 4 ++--
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/deprecation.js b/src/deprecation.js
index c8b67c6..9ebab9f 100644
--- a/src/deprecation.js
+++ b/src/deprecation.js
@@ -7,8 +7,7 @@
  */
 const SourceMapCache = {}
 
-module.exports =
-class Deprecation {
+export default class Deprecation {
   static getFunctionNameFromCallsite(callsite) {}
 
   static deserialize({message, fileName, lineNumber, stacks}) {
diff --git a/src/grim.js b/src/grim.js
index 2af2468..a3d515c 100644
--- a/src/grim.js
+++ b/src/grim.js
@@ -5,7 +5,7 @@
  * DS207: Consider shorter variations of null checks
  * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
  */
-const Deprecation = require('./deprecation');
+import Deprecation from './deprecation';
 
 if (global.__grim__ == null) {
   const {Emitter} = require('event-kit');
@@ -107,4 +107,4 @@ var getRawStack = function(error) {
   return result;
 };
 
-module.exports = global.__grim__;
+export default global.__grim__;

From f1d4a05f086546ec236a443ca2598ccfb492c7ba Mon Sep 17 00:00:00 2001
From: Amin Yahyaabadi <aminyahyaabadi74@gmail.com>
Date: Sat, 3 Apr 2021 23:47:38 -0500
Subject: [PATCH 6/7] Replace var with const and function

---
 src/deprecation.js |  1 -
 src/grim.js        | 10 +++++-----
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/src/deprecation.js b/src/deprecation.js
index 9ebab9f..4a9d207 100644
--- a/src/deprecation.js
+++ b/src/deprecation.js
@@ -2,7 +2,6 @@
  * decaffeinate suggestions:
  * DS102: Remove unnecessary code created because of implicit returns
  * DS104: Avoid inline assignments
- * DS207: Consider shorter variations of null checks
  * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
  */
 const SourceMapCache = {}
diff --git a/src/grim.js b/src/grim.js
index a3d515c..7d61411 100644
--- a/src/grim.js
+++ b/src/grim.js
@@ -1,15 +1,14 @@
 /*
  * decaffeinate suggestions:
- * DS102: Remove unnecessary code created because of implicit returns
  * DS104: Avoid inline assignments
- * DS207: Consider shorter variations of null checks
  * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
  */
 import Deprecation from './deprecation';
 
+
 if (global.__grim__ == null) {
   const {Emitter} = require('event-kit');
-  var grim = (global.__grim__ = {
+  const grim = {
     deprecations: {},
     emitter: new Emitter,
     includeDeprecatedAPIs: true,
@@ -95,10 +94,11 @@ if (global.__grim__ == null) {
     },
 
     on(eventName, callback) { return grim.emitter.on(eventName, callback); }
-  });
+  };
+  global.__grim__ = grim;
 }
 
-var getRawStack = function(error) {
+function getRawStack(error) {
   const originalPrepareStackTrace = Error.prepareStackTrace;
   Error.prepareStackTrace = (error, stack) => stack;
   Error.captureStackTrace(error, getRawStack);

From 331c721e786f4baef5e7cd3af52febf894ea1165 Mon Sep 17 00:00:00 2001
From: Amin Yahyaabadi <aminyahyaabadi74@gmail.com>
Date: Sat, 3 Apr 2021 23:48:49 -0500
Subject: [PATCH 7/7] Use node 12 in ci

---
 .travis.yml  | 2 +-
 appveyor.yml | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index cca5330..40a2951 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: node_js
-node_js: '10'
+node_js: '12'
 
 notifications:
   email: false
diff --git a/appveyor.yml b/appveyor.yml
index ebd3e68..91c4aa3 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,7 +1,7 @@
-image: Visual Studio 2015
+image: Visual Studio 2017
 
 environment:
-  nodejs_version: "6"
+  nodejs_version: "12"
 
 platform:
   - x86