move prettier options to function

Author: patricklx

lib/rules/prettier.js

@@ -19,11 +19,28 @@ export default class Prettier extends Rule {
   constructor(options) {
     super(options);
     this.filePath = options.filePath;
-    let config = options.config;
-    if (Array.isArray(config)) {
-      config = config[0];
+  }
+
+  getPrettierOptions() {
+    let filepath = this.filePath;
+
+    if (!prettier) {
+      // Prettier is expensive to load, so only load it if needed.
+      prettier = require("prettier");
     }
-    this.prettierConfig = typeof config !== "object" ? {} : config;
+
+    const prettierRcOptions = prettier.resolveConfig.sync(filepath, {
+      editorconfig: true,
+    });    
+
+    return Object.assign(
+      {},
+      { parser: "glimmer" },
+      prettierRcOptions,
+      {
+        filepath,
+      }
+    );
   }
 
   visitor() {
@@ -40,37 +57,19 @@ export default class Prettier extends Rule {
             prettier.clearConfigCache();
           }
 
-          const source = this.sourceForNode(node);
-          let filepath = this.filePath;
-
-          if (!prettier) {
-            // Prettier is expensive to load, so only load it if needed.
-            prettier = require("prettier");
+          const source = this.sourceForNode(node);          
+      
+          // Skip if file is ignored using a .prettierignore file
+          if (prettierFileInfo.ignored) {
+            return;
           }
 
-          const prettierRcOptions = prettier.resolveConfig.sync(filepath, {
-            editorconfig: true,
-          });
+          const prettierOptions = this.getPrettierOptions();
 
           const prettierFileInfo = prettier.getFileInfo.sync(filepath, {
             ignorePath: ".prettierignore",
           });
 
-          // Skip if file is ignored using a .prettierignore file
-          if (prettierFileInfo.ignored) {
-            return;
-          }
-
-          const prettierOptions = Object.assign(
-            {},
-            { parser: "glimmer" },
-            prettierRcOptions,
-            this.prettierConfig,
-            {
-              filepath,
-            }
-          );
-
           let prettierSource;
           try {
             prettierSource = prettier.format(source, prettierOptions);