feat: add typings support

.changeset/quiet-cups-pull.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-prettier": minor
+---
+
+feat: add typings support

.eslintrc.json

@@ -7,6 +7,9 @@
     "@1stg",
     "plugin:eslint-plugin/recommended"
   ],
+  "parserOptions": {
+    "project": null
+  },
   "rules": {
     "eslint-plugin/report-message-format": [
       "error",

.github/FUNDING.yml

@@ -1,8 +1,8 @@
 github:
   - JounQin
   - 1stG
-  - rxts
-  - unts
+  - rx-ts
+  - un-ts
 patreon: 1stG
 open_collective: prettier
 custom:

eslint-plugin-prettier.d.ts

@@ -0,0 +1,5 @@
+import { ESLint } from 'eslint';
+
+declare const eslintPluginPrettier: ESLint.Plugin;
+
+export = eslintPluginPrettier;

eslint-plugin-prettier.js

@@ -3,6 +3,14 @@
  * @author Andres Suarez
  */
 
+// @ts-check
+
+/**
+ * @typedef {import('eslint').AST.Range} Range
+ * @typedef {import('eslint').AST.SourceLocation} SourceLocation
+ * @typedef {import('eslint').ESLint.Plugin} Plugin
+ */
+
 'use strict';
 
 // ------------------------------------------------------------------------------
@@ -26,7 +34,7 @@ const { INSERT, DELETE, REPLACE } = generateDifferences;
 
 // Lazily-loaded Prettier.
 /**
- * @type {import('prettier')}
+ * @type {typeof import('prettier')}
  */
 let prettier;
 
@@ -43,7 +51,7 @@ let prettier;
  */
 function reportDifference(context, difference) {
   const { operation, offset, deleteText = '', insertText = '' } = difference;
-  const range = [offset, offset + deleteText.length];
+  const range = /** @type {Range} */ ([offset, offset + deleteText.length]);
   const [start, end] = range.map(index =>
     context.getSourceCode().getLocFromIndex(index),
   );
@@ -63,7 +71,10 @@ function reportDifference(context, difference) {
 //  Module Definition
 // ------------------------------------------------------------------------------
 
-module.exports = {
+/**
+ * @type {Plugin}
+ */
+const eslintPluginPrettier = {
   configs: {
     recommended: {
       extends: ['prettier'],
@@ -241,7 +252,9 @@ module.exports = {
                 'angular',
                 'svelte',
               ];
-              if (parserBlocklist.includes(inferredParser)) {
+              if (
+                parserBlocklist.includes(/** @type {string} */ (inferredParser))
+              ) {
                 return;
               }
             }
@@ -261,6 +274,9 @@ module.exports = {
             // files throw an error if they contain unclosed elements, such as
             // `<template><div></template>. In this case report an error at the
             // point at which parsing failed.
+            /**
+             * @type {string}
+             */
             let prettierSource;
             try {
               prettierSource = prettier.format(source, prettierOptions);
@@ -271,18 +287,23 @@ module.exports = {
 
               let message = 'Parsing error: ' + err.message;
 
+              const error =
+                /** @type {SyntaxError & {codeFrame: string; loc: SourceLocation}} */ (
+                  err
+                );
+
               // Prettier's message contains a codeframe style preview of the
               // invalid code and the line/column at which the error occurred.
               // ESLint shows those pieces of information elsewhere already so
               // remove them from the message
-              if (err.codeFrame) {
-                message = message.replace(`\n${err.codeFrame}`, '');
+              if (error.codeFrame) {
+                message = message.replace(`\n${error.codeFrame}`, '');
               }
-              if (err.loc) {
+              if (error.loc) {
                 message = message.replace(/ \(\d+:\d+\)$/, '');
               }
 
-              context.report({ message, loc: err.loc });
+              context.report({ message, loc: error.loc });
 
               return;
             }
@@ -300,3 +321,5 @@ module.exports = {
     },
   },
 };
+
+module.exports = eslintPluginPrettier;

package.json

@@ -15,7 +15,9 @@
     "node": "^14.18.0 || >=16.0.0"
   },
   "main": "eslint-plugin-prettier.js",
+  "types": "eslint-plugin-prettier.d.ts",
   "files": [
+    "eslint-plugin-prettier.d.ts",
     "eslint-plugin-prettier.js"
   ],
   "keywords": [
@@ -25,6 +27,7 @@
     "prettier"
   ],
   "scripts": {
+    "build": "tsc -b",
     "format": "yarn prettier '**/*.{js,json,md,yml}' --write && yarn lint --fix",
     "lint": "eslint . --cache -f friendly --max-warnings 10",
     "prepare": "simple-git-hooks && yarn-deduplicate --strategy fewer || exit 0",
@@ -33,10 +36,14 @@
     "test": "yarn lint && mocha"
   },
   "peerDependencies": {
+    "@types/eslint": ">=8.0.0",
     "eslint": ">=8.0.0",
     "prettier": ">=2.0.0"
   },
   "peerDependenciesMeta": {
+    "@types/eslint": {
+      "optional": true
+    },
     "eslint-config-prettier": {
       "optional": true
     }
@@ -50,6 +57,9 @@
     "@changesets/changelog-github": "^0.4.6",
     "@changesets/cli": "^2.24.4",
     "@graphql-eslint/eslint-plugin": "^3.10.7",
+    "@types/eslint": "^8.4.6",
+    "@types/prettier": "^2.7.0",
+    "@types/prettier-linter-helpers": "^1.0.1",
     "@typescript-eslint/parser": "^5.36.1",
     "eslint-config-prettier": "^8.5.0",
     "eslint-mdx": "^2.0.2",
@@ -66,6 +76,6 @@
   },
   "resolutions": {
     "eslint-plugin-prettier": "link:.",
-    "prettier": "^2.7.1"
+    "prettier": "^2.0.0"
   }
 }

yarn.lock

@@ -2353,6 +2353,14 @@
   dependencies:
     "@types/ms" "*"
 
+"@types/eslint@^8.4.6":
+  version "8.4.6"
+  resolved "https://registry.yarnpkg.com/@types/eslint/-/eslint-8.4.6.tgz#7976f054c1bccfcf514bff0564c0c41df5c08207"
+  integrity sha512-/fqTbjxyFUaYNO7VcW5g+4npmqVACz1bB7RTHYuLj+PRjw9hrCwrUXVQFpChUS0JsyEFvMZ7U/PfmvWgxJhI9g==
+  dependencies:
+    "@types/estree" "*"
+    "@types/json-schema" "*"
+
 "@types/estree-jsx@^1.0.0":
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/@types/estree-jsx/-/estree-jsx-1.0.0.tgz#7bfc979ab9f692b492017df42520f7f765e98df1"
@@ -2384,7 +2392,7 @@
   resolved "https://registry.yarnpkg.com/@types/is-empty/-/is-empty-1.2.1.tgz#18d7256a73e43ec51f8b75c25fbdc31350be52a6"
   integrity sha512-a3xgqnFTuNJDm1fjsTjHocYJ40Cz3t8utYpi5GNaxzrJC2HSD08ym+whIL7fNqiqBCdM9bcqD1H/tORWAFXoZw==
 
-"@types/json-schema@^7.0.9":
+"@types/json-schema@*", "@types/json-schema@^7.0.9":
   version "7.0.11"
   resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.11.tgz#d421b6c527a3037f7c84433fd2c4229e016863d3"
   integrity sha512-wOuvG1SN4Us4rez+tylwwwCV1psiNVOkJeM3AUWUNWg/jDQY2+HE/444y5gc+jBmRqASOm2Oeh5c1axHobwRKQ==
@@ -2431,6 +2439,16 @@
   resolved "https://registry.yarnpkg.com/@types/parse-json/-/parse-json-4.0.0.tgz#2f8bb441434d163b35fb8ffdccd7138927ffb8c0"
   integrity sha512-//oorEZjL6sbPcKUaCdIGlIUeH26mgzimjBB77G6XRgnDl/L5wOnpyBGRe/Mmf5CVW3PwEBE1NjiMZ/ssFh4wA==
 
+"@types/prettier-linter-helpers@^1.0.1":
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/@types/prettier-linter-helpers/-/prettier-linter-helpers-1.0.1.tgz#463c97a9e386fe2781026852fa97bca3dfd42625"
+  integrity sha512-3O6c5261s6dNZDSZ2jQM57Mw7tGIREc3IjN7WJjWYqPKzzIYW9ujri2O1gRGVhFlfLTJl/cU/Ju26S0Otm5cog==
+
+"@types/prettier@^2.7.0":
+  version "2.7.0"
+  resolved "https://registry.yarnpkg.com/@types/prettier/-/prettier-2.7.0.tgz#ea03e9f0376a4446f44797ca19d9c46c36e352dc"
+  integrity sha512-RI1L7N4JnW5gQw2spvL7Sllfuf1SaHdrZpCHiBlCXjIlufi1SMNnbu2teze3/QE67Fg2tBlH7W+mi4hVNk4p0A==
+
 "@types/semver@^6.0.0":
   version "6.2.3"
   resolved "https://registry.yarnpkg.com/@types/semver/-/semver-6.2.3.tgz#5798ecf1bec94eaa64db39ee52808ec0693315aa"
@@ -7311,7 +7329,7 @@ prettier-plugin-toml@^0.3.1:
     "@toml-tools/parser" "^0.3.1"
     prettier "^1.16.0"
 
-prettier@>=2.3, prettier@>=2.3.0, prettier@>=2.4.0, prettier@^1.16.0, prettier@^2.6.2, prettier@^2.7.1:
+prettier@>=2.3, prettier@>=2.3.0, prettier@>=2.4.0, prettier@^1.16.0, prettier@^2.0.0, prettier@^2.6.2, prettier@^2.7.1:
   version "2.7.1"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.7.1.tgz#e235806850d057f97bb08368a4f7d899f7760c64"
   integrity sha512-ujppO+MkdPqoVINuDFDRLClm7D78qbDt0/NR+wp5FqEZOoTNAjPHWj17QRhu7geIHJfcNhRk1XVQmF8Bp3ye+g==