Move dependency loading to a function

Move all loading of dependencies to a function that is only called when
it is first needed. Once dependencies are loaded they are no longer
required.

Author: Arcanemagus

lib/index.js

@@ -2,28 +2,54 @@
 
 // eslint-disable-next-line import/extensions, import/no-extraneous-dependencies
 import { CompositeDisposable } from 'atom';
-import { readFile as fsReadFile } from 'fs';
-import { dirname } from 'path';
 
-const lazyReq = require('lazy-req')(require);
-
-const { findAsync, generateRange } = lazyReq('atom-linter')('findAsync', 'generateRange');
-const stripJSONComments = lazyReq('strip-json-comments');
-const tinyPromisify = lazyReq('tiny-promisify');
+// Dependencies
+let dirname;
+let HTMLHint;
+let findAsync;
+let fsReadFile;
+let generateRange;
+let tinyPromisify;
+let stripJSONComments;
 
 const getConfig = async (filePath) => {
-  const readFile = tinyPromisify()(fsReadFile);
+  const readFile = tinyPromisify(fsReadFile);
   const configPath = await findAsync(dirname(filePath), '.htmlhintrc');
   let conf = null;
   if (configPath !== null) {
     conf = await readFile(configPath, 'utf8');
   }
   if (conf) {
-    return JSON.parse(stripJSONComments()(conf));
+    return JSON.parse(stripJSONComments(conf));
   }
   return null;
 };
 
+const loadDeps = () => {
+  if (loadDeps.loaded) {
+    return;
+  }
+  if (!dirname) {
+    ({ dirname } = require('path'));
+  }
+  if (!HTMLHint) {
+    ({ HTMLHint } = require('htmlhint'));
+  }
+  if (!findAsync || !generateRange) {
+    ({ findAsync, generateRange } = require('atom-linter'));
+  }
+  if (!fsReadFile) {
+    ({ readFile: fsReadFile } = require('fs'));
+  }
+  if (!tinyPromisify) {
+    tinyPromisify = require('tiny-promisify');
+  }
+  if (!stripJSONComments) {
+    stripJSONComments = require('strip-json-comments');
+  }
+  loadDeps.loaded = true;
+};
+
 export default {
   activate() {
     require('atom-package-deps').install('linter-htmlhint');
@@ -65,7 +91,8 @@ export default {
           return [];
         }
 
-        const { HTMLHint } = require('htmlhint');
+        // Ensure that all dependencies are loaded
+        loadDeps();
 
         const ruleset = await getConfig(filePath);
 

package.json

@@ -45,7 +45,6 @@
     "atom-linter": "^10.0.0",
     "atom-package-deps": "^4.0.1",
     "htmlhint": "0.9.13",
-    "lazy-req": "^2.0.0",
     "strip-json-comments": "^2.0.1",
     "tiny-promisify": "^1.0.0"
   },