feat: oxfmt action

Author: pi0

actions/unjs/oxfmt.ts

@@ -0,0 +1,58 @@
+import { defineAction } from "codeup";
+
+// https://prettier.io/docs/configuration
+const PRETTIER_CONFIG_FILES = [
+  ".prettierrc",
+  ".prettierrc.json",
+  ".prettierrc.yml",
+  ".prettierrc.yaml",
+  ".prettierrc.json5",
+  ".prettierrc.js",
+  ".prettierrc.mjs",
+  ".prettierrc.cjs",
+  ".prettierrc.toml",
+  "prettier.config.js",
+  "prettier.config.mjs",
+  "prettier.config.cjs",
+  ".prettierignore",
+];
+
+export default defineAction({
+  meta: {
+    name: "oxfmt",
+    description: "Switch from Prettier to oxfmt",
+    date: "2026-01-29",
+  },
+  async filter({ utils }) {
+    // Only apply if .prettierrc (with any extension) exists
+    return await utils.existsWithAnyExt(".prettierrc");
+  },
+  async apply({ utils }) {
+    // Remove prettier from devDependencies
+    const packageJson = await utils.readPackageJSON();
+    if (packageJson?.devDependencies?.prettier) {
+      await utils.removeDependency("prettier");
+    }
+
+    // Remove all prettier config files
+    for (const file of PRETTIER_CONFIG_FILES) {
+      await utils.remove(file);
+    }
+
+    // Create .oxfmtrc.json (only if not exists)
+    await utils.write(
+      ".oxfmtrc.json",
+      JSON.stringify(
+        {
+          $schema: "https://unpkg.com/oxfmt/configuration_schema.json",
+        },
+        null,
+        2,
+      ),
+      { skipIfExists: true },
+    );
+
+    // Install oxfmt as dev dependency
+    await utils.addDevDependency("oxfmt");
+  },
+});