feat!: move to ESM. Prettier v3

Author: shellscape

.gitignore

@@ -10,3 +10,4 @@ dist
 test/fixtures/**/dist
 
 .eslintcache
+.claude

.prettierrc

@@ -1,3 +1,4 @@
 {
-  "plugins": ["./lib/index.js"]
+  "plugins": ["./lib/index.js"],
+  "singleQuote": true
 }

lib/index.js

@@ -8,18 +8,16 @@
   The above copyright notice and this permission notice shall be
   included in all copies or substantial portions of this Source Code Form.
 */
-import babelParsers from "prettier/plugins/babel";
-import estreeParsers from "prettier/plugins/estree";
-import prettier from "prettier";
+import babelParsers from 'prettier/plugins/babel';
 
-import { dependencies } from "./rules/dependencies.js";
-import { engines } from "./rules/engines.js";
-import { files } from "./rules/files.js";
-import { scripts } from "./rules/scripts.js";
-import { sort } from "./rules/sort.js";
+import { dependencies } from './rules/dependencies.js';
+import { engines } from './rules/engines.js';
+import { files } from './rules/files.js';
+import { scripts } from './rules/scripts.js';
+import { sort } from './rules/sort.js';
 
 const { parsers } = babelParsers;
-const { "json-stringify": parser } = parsers;
+const { 'json-stringify': parser } = parsers;
 const { parse } = parser;
 const rePkg = /package\.json$/;
 
@@ -34,28 +32,26 @@ const format = (properties) => {
 };
 
 const plugin = {
-  name: "prettier-plugin-package",
+  name: 'prettier-plugin-package',
   parsers: {
-    "json-stringify": {
+    'json-stringify': {
       ...parser,
       async parse(text, options) {
         const { filepath } = options;
         const ast = parse(text, options);
 
         if (rePkg.test(filepath)) {
           const { properties, node } = ast;
-          ast.properties = format(properties || node.properties);
-        }
+          const affectNode = !properties && !!node?.properties;
+          const formatResult = format(properties || node.properties);
 
-        const formattedText = await prettier.format(text, {
-          parser: "json-stringify",
-          plugins: [babelParsers, estreeParsers],
-        });
-        console.log("Formatted text:", formattedText);
+          if (affectNode) ast.node.properties = formatResult;
+          else ast.properties = formatResult;
+        }
 
         return ast;
       },
-      astFormat: "estree-json",
+      astFormat: 'estree-json',
     },
   },
 };

lib/rules/dependencies.js

@@ -16,7 +16,7 @@ const dependencyNames = [
   'peerDependencies',
   'dependencies',
   'devDependencies',
-  'resolutions'
+  'resolutions',
 ];
 
 const process = (props) =>
@@ -25,16 +25,18 @@ const process = (props) =>
       const { elements, properties } = prop.value;
 
       if (elements) {
-        elements.sort((a, b) => (a.value > b.value ? 1 : a.value < b.value ? -1 : 0));
+        elements.sort((a, b) =>
+          a.value > b.value ? 1 : a.value < b.value ? -1 : 0,
+        );
       }
 
       if (properties) {
         properties.sort((a, b) =>
-          a.key.value > b.key.value ? 1 : a.key.value < b.key.value ? -1 : 0
+          a.key.value > b.key.value ? 1 : a.key.value < b.key.value ? -1 : 0,
         );
       }
     }
     return prop;
   });
 
-export {  process as dependencies };
+export { process as dependencies };

lib/rules/engines.js

@@ -15,7 +15,9 @@ const process = (props) => {
     const [engines] = props.splice(enginesIndex, 1);
     const { properties } = engines.value;
 
-    properties.sort((a, b) => (a.key.value > b.key.value ? 1 : a.key.value < b.key.value ? -1 : 0));
+    properties.sort((a, b) =>
+      a.key.value > b.key.value ? 1 : a.key.value < b.key.value ? -1 : 0,
+    );
 
     engines.value.properties = properties;
 
@@ -25,4 +27,4 @@ const process = (props) => {
   return props;
 };
 
-export { process as engines};
+export { process as engines };

lib/rules/files.js

@@ -42,16 +42,10 @@ const process = (props) => {
         return aValue.localeCompare(bValue);
       });
 
-    if (readme) {
-      elements.push(readme);
-    }
-
-    if (license) {
-      elements.push(license);
-    }
+    if (license) elements.push(license);
+    if (readme) elements.push(readme);
 
     filesNode.value.elements = elements;
-
     props.splice(filesIndex, 0, filesNode);
   }
 

lib/rules/props.js

@@ -14,7 +14,7 @@ const process = (props) => {
   if (scriptsIndex >= 0) {
     const scripts = props[scriptsIndex];
     scripts.value.properties.sort((a, b) =>
-      a.key.value > b.key.value ? 1 : a.key.value < b.key.value ? -1 : 0
+      a.key.value > b.key.value ? 1 : a.key.value < b.key.value ? -1 : 0,
     );
     // eslint-disable-next-line no-param-reassign
     props[scriptsIndex] = scripts;

lib/rules/scripts.js

@@ -50,7 +50,7 @@ const primary = [
 
   // types
   'types',
-  'typings'
+  'typings',
 ];
 
 const sort = (props) => {
@@ -66,10 +66,13 @@ const sort = (props) => {
   known.sort((a, b) => {
     const aIndex = primary.indexOf(a.key.value);
     const bIndex = primary.indexOf(b.key.value);
+    const result = aIndex > bIndex ? 1 : aIndex < bIndex ? -1 : 0;
 
-    return aIndex > bIndex ? 1 : aIndex < bIndex ? -1 : 0;
+    return result;
   });
-  unknown.sort((a, b) => (a.key.value > b.key.value ? 1 : a.key.value < b.key.value ? -1 : 0));
+  unknown.sort((a, b) =>
+    a.key.value > b.key.value ? 1 : a.key.value < b.key.value ? -1 : 0,
+  );
 
   return known.concat(unknown);
 };

lib/rules/sort.js

@@ -25,8 +25,8 @@
   },
   "files": [
     "lib/",
-    "README.md",
-    "LICENSE"
+    "LICENSE",
+    "README.md"
   ],
   "keywords": [
     "package",