From d7804ccb7fd0db99f8de8ef3f316e69fef63eac5 Mon Sep 17 00:00:00 2001
From: Victor Grousset/tuxayo <victor@tuxayo.net>
Date: Mon, 14 Oct 2024 19:17:04 +0200
Subject: [PATCH] Bug 38167: Migrate ESLint config to new flat format

Test:
1. Do not apply
2. eslint koha-tmpl/intranet-tmpl/prog/js/ajax.js
3. It should fail
4. ESLINT_USE_FLAT_CONFIG='false' eslint koha-tmpl/intranet-tmpl/prog/js/ajax.js
5. It should work
6. Apply patches
7. Restart KTD to have a clean state of dependencies and check that
   provisionning still works.
8. ESLINT_USE_FLAT_CONFIG='false' eslint koha-tmpl/intranet-tmpl/prog/js/ajax.js
9. It should fail
10. eslint koha-tmpl/intranet-tmpl/prog/js/ajax.js
11. It should work
12 Double check rspack still works: rspack build
   Because we removed babel.

Signed-off-by: Paul Derscheid <paul.derscheid@lmscloud.de>
---
 .eslintrc.json    | 30 ------------------------------
 eslint.config.mjs | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 30 deletions(-)
 delete mode 100644 .eslintrc.json
 create mode 100644 eslint.config.mjs

diff --git a/.eslintrc.json b/.eslintrc.json
deleted file mode 100644
index e7f78af690..0000000000
--- a/.eslintrc.json
+++ /dev/null
@@ -1,30 +0,0 @@
-{
-    "env": {
-        "browser": true,
-        "jquery": true
-    },
-    "extends": [
-        "eslint:recommended",
-        "eslint-config-prettier"
-    ],
-    "plugins": [
-        "eslint-plugin-prettier"
-    ],
-    "rules": {
-        "indent": [
-            "error",
-            4
-        ],
-        "linebreak-style": [
-            "error",
-            "unix"
-        ],
-        "semi": [
-            "error",
-            "always"
-        ],
-        "prettier/prettier": [
-            "error"
-        ]
-    }
-}
diff --git a/eslint.config.mjs b/eslint.config.mjs
new file mode 100644
index 0000000000..6de0fdf936
--- /dev/null
+++ b/eslint.config.mjs
@@ -0,0 +1,34 @@
+import prettier from "eslint-plugin-prettier";
+import globals from "globals";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+    baseDirectory: __dirname,
+    recommendedConfig: js.configs.recommended,
+    allConfig: js.configs.all
+});
+
+export default [...compat.extends("eslint:recommended", "eslint-config-prettier"), {
+    plugins: {
+        prettier,
+    },
+
+    languageOptions: {
+        globals: {
+            ...globals.browser,
+            ...globals.jquery,
+        },
+    },
+
+    rules: {
+        indent: ["error", 4],
+        "linebreak-style": ["error", "unix"],
+        semi: ["error", "always"],
+        "prettier/prettier": ["error"],
+    },
+}];
\ No newline at end of file
-- 
2.47.0