chore: use context properties where context methods are deprecated (#594

)

* chore: use context properties where context methods are deprecated

But keep supporting the methods for now.

---------

Co-authored-by: Ben Scott <ben@reload.me.uk>

eslint-plugin-prettier.js

@@ -54,8 +54,11 @@ let prettierFormat;
 function reportDifference(context, difference) {
   const { operation, offset, deleteText = '', insertText = '' } = difference;
   const range = /** @type {Range} */ ([offset, offset + deleteText.length]);
+  // `context.getSourceCode()` was deprecated in ESLint v8.40.0 and replaced
+  // with the `sourceCode` property.
+  // TODO: Only use property when our eslint peerDependency is >=8.40.0.
   const [start, end] = range.map(index =>
-    context.getSourceCode().getLocFromIndex(index),
+    (context.sourceCode ?? context.getSourceCode()).getLocFromIndex(index),
   );
 
   context.report({
@@ -130,14 +133,26 @@ const eslintPluginPrettier = {
          */
         const fileInfoOptions =
           (context.options[1] && context.options[1].fileInfoOptions) || {};
-        const sourceCode = context.getSourceCode();
-        const filepath = context.getFilename();
+
+        // `context.getSourceCode()` was deprecated in ESLint v8.40.0 and replaced
+        // with the `sourceCode` property.
+        // TODO: Only use property when our eslint peerDependency is >=8.40.0.
+        const sourceCode = context.sourceCode ?? context.getSourceCode();
+        // `context.getFilename()` was deprecated in ESLint v8.40.0 and replaced
+        // with the `filename` property.
+        // TODO: Only use property when our eslint peerDependency is >=8.40.0.
+        const filepath = context.filename ?? context.getFilename();
+
         // Processors that extract content from a file, such as the markdown
         // plugin extracting fenced code blocks may choose to specify virtual
         // file paths. If this is the case then we need to resolve prettier
         // config and file info using the on-disk path instead of the virtual
         // path.
-        const onDiskFilepath = context.getPhysicalFilename();
+        // `context.getPhysicalFilename()` was deprecated in ESLint v8.40.0 and replaced
+        // with the `physicalFilename` property.
+        // TODO: Only use property when our eslint peerDependency is >=8.40.0.
+        const onDiskFilepath =
+          context.physicalFilename ?? context.getPhysicalFilename();
         const source = sourceCode.text;
 
         return {