feat: add eslint config for astro framework (#410)

Co-authored-by: Anthony Fu <anthonyfu117@hotmail.com>

README.md

@@ -12,7 +12,7 @@
 - [ESLint Flat config](https://eslint.org/docs/latest/use/configure/configuration-files-new), compose easily!
 - Using [ESLint Stylistic](https://github.com/eslint-stylistic/eslint-stylistic)
 - Respects `.gitignore` by default
-- Optional [React](#react), [Svelte](#svelte), [UnoCSS](#unocss) support
+- Optional [React](#react), [Svelte](#svelte), [UnoCSS](#unocss), [Astro](#astro) support
 - Optional [formatters](#formatters) support for CSS, HTML, etc.
 - **Style principle**: Minimal for reading, stable for diff, consistent
 
@@ -431,6 +431,25 @@ Running `npx eslint` should prompt you to install the required dependencies, oth
 npm i -D eslint-plugin-svelte
 ```
 
+#### Astro
+
+To enable astro support, you need to explicitly turn it on:
+
+```js
+// eslint.config.js
+import antfu from '@antfu/eslint-config'
+
+export default antfu({
+  astro: true,
+})
+```
+
+Running `npx eslint` should prompt you to install the required dependencies, otherwise, you can install them manually:
+
+```bash
+npm i -D eslint-plugin-astro
+```
+
 #### UnoCSS
 
 To enable UnoCSS support, you need to explicitly turn it on:

fixtures/input/astro.astro

@@ -0,0 +1,7 @@
+---
+const content = "hi!";
+---
+
+<article>
+  <div>{content}</div>
+</article>

fixtures/output/all/astro.astro

@@ -0,0 +1,7 @@
+---
+const content = 'hi!';
+---
+
+  <article>
+    <div>{content}</div>
+  </article>

package.json

@@ -38,7 +38,9 @@
   },
   "peerDependencies": {
     "@unocss/eslint-plugin": ">=0.50.0",
+    "astro-eslint-parser": "^0.16.3",
     "eslint": ">=8.40.0",
+    "eslint-plugin-astro": "^0.31.4",
     "eslint-plugin-format": ">=0.1.0",
     "eslint-plugin-react": "^7.33.2",
     "eslint-plugin-react-hooks": "^4.6.0",
@@ -51,6 +53,12 @@
     "@unocss/eslint-plugin": {
       "optional": true
     },
+    "astro-eslint-parser": {
+      "optional": true
+    },
+    "eslint-plugin-astro": {
+      "optional": true
+    },
     "eslint-plugin-format": {
       "optional": true
     },
@@ -122,9 +130,11 @@
     "@types/prompts": "^2.4.9",
     "@types/yargs": "^17.0.32",
     "@unocss/eslint-plugin": "^0.58.5",
+    "astro-eslint-parser": "^0.16.3",
     "bumpp": "^9.3.0",
     "eslint": "npm:eslint-ts-patch@^8.56.0-0",
     "eslint-flat-config-viewer": "^0.1.11",
+    "eslint-plugin-astro": "^0.31.4",
     "eslint-plugin-format": "^0.1.0",
     "eslint-plugin-react": "^7.33.2",
     "eslint-plugin-react-hooks": "^4.6.0",