Move config schema to separate file for readability

.editorconfig

@@ -1,6 +1,6 @@
 root = true
 
-[{src/**.js,*.{js,json},.babelrc,*.md}]
+[{src/**.{js,json},*.json,.babelrc,*.md}]
 indent_style = space
 indent_size = 2
 end_of_line = lf

package.json

@@ -12,7 +12,7 @@
   },
   "lint-staged": {
     "*.js": [
-      "prettier --write --no-semi --single-quote --trailing-comma es5 '{src/**/*.js,*.json}'",
+      "prettier --write --no-semi --single-quote --trailing-comma es5 '{src/**/*.{js,json},*.json}'",
       "git add"
     ]
   },

src/HtmlWebpackExternalsPlugin.js

@@ -1,60 +1,12 @@
 import CopyWebpackPlugin from 'copy-webpack-plugin'
 import HtmlWebpackIncludeAssetsPlugin from 'html-webpack-include-assets-plugin'
 import Ajv from 'ajv'
+import configSchema from './configSchema.json'
 
 export default class HtmlWebpackExternalsPlugin {
   static validateArguments = (() => {
     const ajv = new Ajv({ useDefaults: true })
-    const validateConfig = ajv.compile({
-      type: 'object',
-      properties: {
-        externals: {
-          type: 'array',
-          items: {
-            type: 'object',
-            properties: {
-              module: { type: 'string' },
-              entry: {
-                type: ['string', 'array', 'object'],
-                items: {
-                  type: ['string', 'object'],
-                  properties: {
-                    path: { type: 'string' },
-                    type: { type: 'string', enum: ['js', 'css'] },
-                  },
-                  required: ['path', 'type'],
-                },
-                minItems: 1,
-                properties: {
-                  path: { type: 'string' },
-                  type: { type: 'string', enum: ['js', 'css'] },
-                },
-                required: ['path', 'type'],
-              },
-              global: { type: ['string', 'null'], default: null },
-              supplements: {
-                type: 'array',
-                items: { type: 'string' },
-                default: [],
-              },
-              append: { type: 'boolean', default: false },
-            },
-            required: ['module', 'entry'],
-          },
-          minItems: 1,
-        },
-        hash: { type: 'boolean', default: false },
-        outputPath: { type: 'string', default: 'vendor' },
-        publicPath: { type: ['string', 'null'], default: null },
-        files: {
-          type: ['string', 'array', 'null'],
-          items: { type: 'string' },
-          minItems: 1,
-          default: null,
-        },
-      },
-      required: ['externals'],
-    })
+    const validateConfig = ajv.compile(configSchema)
 
     return config => {
       if (!validateConfig(config)) {

src/configSchema.json

@@ -0,0 +1,81 @@
+{
+  "type": "object",
+  "properties": {
+    "externals": {
+      "type": "array",
+      "items": {
+        "type": "object",
+        "properties": {
+          "module": {
+            "type": "string"
+          },
+          "entry": {
+            "type": ["string", "array", "object"],
+            "items": {
+              "type": ["string", "object"],
+              "properties": {
+                "path": {
+                  "type": "string"
+                },
+                "type": {
+                  "type": "string",
+                  "enum": ["js", "css"]
+                }
+              },
+              "required": ["path", "type"]
+            },
+            "minItems": 1,
+            "properties": {
+              "path": {
+                "type": "string"
+              },
+              "type": {
+                "type": "string",
+                "enum": ["js", "css"]
+              }
+            },
+            "required": ["path", "type"]
+          },
+          "global": {
+            "type": ["string", "null"],
+            "default": null
+          },
+          "supplements": {
+            "type": "array",
+            "items": {
+              "type": "string"
+            },
+            "default": []
+          },
+          "append": {
+            "type": "boolean",
+            "default": false
+          }
+        },
+        "required": ["module", "entry"]
+      },
+      "minItems": 1
+    },
+    "hash": {
+      "type": "boolean",
+      "default": false
+    },
+    "outputPath": {
+      "type": "string",
+      "default": "vendor"
+    },
+    "publicPath": {
+      "type": ["string", "null"],
+      "default": null
+    },
+    "files": {
+      "type": ["string", "array", "null"],
+      "items": {
+        "type": "string"
+      },
+      "minItems": 1,
+      "default": null
+    }
+  },
+  "required": ["externals"]
+}