feature: @putout/plugin-eslint: apply-dir-to-flat

packages/plugin-eslint/README.md

@@ -17,28 +17,30 @@ npm i @putout/plugin-eslint -D
 
 ## Rules
 
-- ✅ [add-putout](#add-putout)
-- ✅ [apply-match-to-flat](#apply-match-to-flat)
-- ✅ [apply-safe-align](#apply-safe-align)
-- ✅ [convert-files-to-array](#convert-files-to-array)
-- ✅ [convert-ide-to-safe](#convert-ide-to-safe)
-- ✅ [convert-node-to-n](#convert-node-to-n)
-- ✅ [convert-rc-to-flat](#convert-rc-to-flat)
-- ✅ [convert-require-to-import](#convert-require-to-import)
-- ✅ [declare](#declare)
-- ✅ [move-putout-to-end-of-extends](#move-putout-to-end-of-extends)
-- ✅ [remove-no-missing](#remove-no-missing)
-- ✅ [remove-no-unpublished-require](#remove-no-unpublished-require)
-- ✅ [remove-no-unsupported-features](#remove-no-unsupported-features)
-- ✅ [remove-overrides-with-empty-rules](#remove-overrides-with-empty-rules)
-- ✅ [remove-useless-slice](#remove-useless-slice)
+- ✅ [add-putout](#add-putout);
+- ✅ [apply-dir-to-flat](#apply-dir-to-flat);
+- ✅ [apply-match-to-flat](#apply-match-to-flat);
+- ✅ [apply-safe-align](#apply-safe-align);
+- ✅ [convert-files-to-array](#convert-files-to-array);
+- ✅ [convert-ide-to-safe](#convert-ide-to-safe);
+- ✅ [convert-node-to-n](#convert-node-to-n);
+- ✅ [convert-rc-to-flat](#convert-rc-to-flat);
+- ✅ [convert-require-to-import](#convert-require-to-import);
+- ✅ [declare](#declare);
+- ✅ [move-putout-to-end-of-extends](#move-putout-to-end-of-extends);
+- ✅ [remove-no-missing](#remove-no-missing);
+- ✅ [remove-no-unpublished-require](#remove-no-unpublished-require);
+- ✅ [remove-no-unsupported-features](#remove-no-unsupported-features);
+- ✅ [remove-overrides-with-empty-rules](#remove-overrides-with-empty-rules);
+- ✅ [remove-useless-slice](#remove-useless-slice);
 
 ## Config
 
 ```json
 {
     "rules": {
         "eslint/add-putout": "on",
+        "eslint/apply-dir-to-flat": "on",
         "eslint/apply-safe-align": "on",
         "eslint/apply-match-to-flat": "on",
         "eslint/move-putout-to-end-of-extends": "on",
@@ -91,6 +93,39 @@ npm i @putout/plugin-eslint -D
 }
 ```
 
+## apply-dir-to-flat
+
+`matchToFlatDir()` and `mergeESLintConfigs` supports `__dirname` or `import.meta.url` starting from `v2` of [`@putout/eslint-flat`](https://www.npmjs.com/package/@putout/eslint-flat).
+
+Check out in 🐊[**Putout Editor**](https://putout.cloudcmd.io/#/gist/805d120cbee5d216b91473d5a71f8d78/1f5b440ef7b63b56a4a12cdfcafe419764a62889).
+
+### ❌ Example of incorrect code
+
+```js
+const scriptsConfig = await matchToFlatDir('scripts');
+const monoConfig = await mergeESLintConfigs(['codemods', 'packages', 'rules']);
+
+module.exports = [
+    ...scriptsConfig,
+    ...monoConfig,
+];
+```
+
+### ✅ Example of correct code
+
+```js
+// CommonJS
+const scriptsConfig = await matchToFlatDir(__dirname, 'scripts');
+
+// ESM
+const monoConfig = await mergeESLintConfigs(import.meta.url, ['codemods', 'packages', 'rules']);
+
+module.exports = [
+    ...scriptsConfig,
+    ...monoConfig,
+];
+```
+
 ## apply-match-to-flat
 
 Check out in 🐊[**Putout Editor**](https://putout.cloudcmd.io/#/gist/805d120cbee5d216b91473d5a71f8d78/1f5b440ef7b63b56a4a12cdfcafe419764a62889).

packages/plugin-eslint/lib/apply-dir-to-flat/fixture/apply-dir-to-flat-fix.js

@@ -0,0 +1,3 @@
+const scriptsConfig = await matchToFlatDir(__dirname, 'scripts');
+
+const monoConfig = await mergeESLintConfigs(__dirname, ['codemods', 'packages', 'rules']);

packages/plugin-eslint/lib/apply-dir-to-flat/fixture/apply-dir-to-flat.js

@@ -0,0 +1,3 @@
+const scriptsConfig = await matchToFlatDir('scripts');
+
+const monoConfig = await mergeESLintConfigs(['codemods', 'packages', 'rules']);

packages/plugin-eslint/lib/apply-dir-to-flat/fixture/esm-fix.js

@@ -0,0 +1,4 @@
+import {matchToFlatDir} from '@putout/eslint-flat';
+
+const scriptsConfig = await matchToFlatDir(import.meta.url, 'scripts');
+const monoConfig = await mergeESLintConfigs(import.meta.url, ['codemods', 'packages', 'rules']);

packages/plugin-eslint/lib/apply-dir-to-flat/fixture/esm.js

@@ -0,0 +1,4 @@
+import {matchToFlatDir} from '@putout/eslint-flat';
+
+const scriptsConfig = await matchToFlatDir('scripts');
+const monoConfig = await mergeESLintConfigs(['codemods', 'packages', 'rules']);

packages/plugin-eslint/lib/apply-dir-to-flat/index.js

@@ -0,0 +1,18 @@
+'use strict';
+
+const {operator} = require('putout');
+const {isESM} = operator;
+const createName = (a) => isESM(a) ? 'import.meta.url' : '__dirname';
+
+module.exports.report = () => `Use 'if condition' instead of 'ternary expression'`;
+
+module.exports.replace = () => ({
+    'matchToFlatDir(__a)': (vars, path) => {
+        const name = createName(path);
+        return `matchToFlatDir(${name}, __a)`;
+    },
+    'mergeESLintConfigs(__a)': (vars, path) => {
+        const name = createName(path);
+        return `mergeESLintConfigs(${name}, __a)`;
+    },
+});

packages/plugin-eslint/lib/apply-dir-to-flat/index.spec.js

@@ -0,0 +1,26 @@
+'use strict';
+
+const {createTest} = require('@putout/test');
+const plugin = require('.');
+
+const test = createTest(__dirname, {
+    printer: 'putout',
+    plugins: [
+        ['apply-dir-to-flat', plugin],
+    ],
+});
+
+test('eslint: apply-dir-to-flat: report', (t) => {
+    t.report('apply-dir-to-flat', `Use 'if condition' instead of 'ternary expression'`);
+    t.end();
+});
+
+test('eslint: apply-dir-to-flat: transform', (t) => {
+    t.transform('apply-dir-to-flat');
+    t.end();
+});
+
+test('eslint: apply-dir-to-flat: transform: esm', (t) => {
+    t.transform('esm');
+    t.end();
+});

packages/plugin-eslint/lib/index.js

@@ -15,6 +15,7 @@ const addPutout = require('./add-putout/index.js');
 const removeUselessSlice = require('./remove-useless-slice');
 const convertFilesToArray = require('./convert-files-to-array');
 const applyMatchToFlat = require('./apply-match-to-flat');
+const applyDirToFlat = require('./apply-dir-to-flat');
 
 module.exports.rules = {
     'add-putout': addPutout,
@@ -32,4 +33,5 @@ module.exports.rules = {
     'remove-useless-slice': removeUselessSlice,
     'convert-files-to-array': convertFilesToArray,
     'apply-match-to-flat': applyMatchToFlat,
+    'apply-dir-to-flat': applyDirToFlat,
 };

packages/plugin-eslint/test/eslint.js

@@ -89,3 +89,8 @@ test('plugin-eslint: transform: apply-match-to-flat', (t) => {
     t.transform('apply-match-to-flat');
     t.end();
 });
+
+test('plugin-eslint: transform: apply-dir-to-flat', (t) => {
+    t.transform('apply-dir-to-flat');
+    t.end();
+});

packages/plugin-eslint/test/fixture/apply-dir-to-flat-fix.js

@@ -0,0 +1,6 @@
+import {matchToFlat} from '@putout/eslint-flat';
+import {mergeESLintConfigs} from '@putout/eslint-flat';
+
+const scriptsConfig = await matchToFlatDir(__dirname, 'scripts');
+
+const monoConfig = await mergeESLintConfigs(import.meta.url, ['codemods', 'packages', 'rules']);

packages/plugin-eslint/test/fixture/apply-dir-to-flat.js

@@ -0,0 +1,3 @@
+const scriptsConfig = await matchToFlatDir('scripts');
+
+const monoConfig = await mergeESLintConfigs(['codemods', 'packages', 'rules']);