fix(create): preserve shorthand fmt/lint config keys

vp create and vp migrate inject default fmt/lint blocks into the project's
vite.config.ts, guarded by has_config_key. That check only matched
`key: value` pairs, so a template that declares fmt/lint via shorthand
properties (`fmt,` / `lint,`) was treated as not having them and got a
duplicate inline key.

Detect shorthand_property_identifier nodes in has_config_key so a
shorthand-declared key counts as present.

Closes #1836

Author: fengmk2

crates/vite_migration/src/vite_config.rs

@@ -291,19 +291,25 @@ fn strip_schema_property(config: &str) -> Cow<'_, str> {
 /// duplicate keys are resolved at runtime by JS spread semantics.
 ///
 /// Returns `true` only when the key appears as a **direct** member of one of
-/// those recognized object literals. Comments, string occurrences, nested
-/// keys (e.g. `plugins: [{ fmt: ... }]`), and unrelated objects are all
-/// ignored correctly.
+/// those recognized object literals, either as a `key: value` pair or as a
+/// `{ key }` shorthand property (e.g. a template wiring in tooling config with
+/// `fmt,` / `lint,`). Comments, string occurrences, nested keys (e.g.
+/// `plugins: [{ fmt: ... }]`), and unrelated objects are all ignored correctly.
 pub fn has_config_key(vite_config_content: &str, config_key: &str) -> Result<bool, Error> {
     let grep = SupportLang::TypeScript.ast_grep(vite_config_content);
     let root = grep.root();
 
     for node in root.dfs() {
-        if node.kind() != "pair" {
-            continue;
-        }
-        let Some(key_node) = node.field("key") else { continue };
-        if !pair_key_matches(&key_node, config_key) {
+        // Match both `key: value` pairs and `{ key }` shorthand properties. A
+        // custom template that wires tooling config in via shorthand (`fmt,` /
+        // `lint,`) still declares the key, so it must not get a duplicate
+        // inline key injected by `vp create` / `vp lint --init`. See #1836.
+        let matches_key = match node.kind().as_ref() {
+            "pair" => node.field("key").is_some_and(|key| pair_key_matches(&key, config_key)),
+            "shorthand_property_identifier" => node.text() == config_key,
+            _ => continue,
+        };
+        if !matches_key {
             continue;
         }
         let Some(parent_object) = node.parent() else { continue };
@@ -1062,6 +1068,58 @@ export default () =>
         assert!(has_config_key(cfg, "fmt").unwrap());
     }
 
+    #[test]
+    fn test_has_config_key_shorthand_property() {
+        // A custom template that keeps tooling config in separate modules wires
+        // them in with shorthand properties (`fmt,` / `lint,`). The key is
+        // present even though there is no explicit value, so `vp create` /
+        // `vp lint --init` must not inject a duplicate inline key. See #1836.
+        let cfg = r#"import { defineConfig } from 'vite-plus';
+
+import { fmt } from './tooling/format';
+import { lint } from './tooling/lint';
+
+export default defineConfig(({ mode }) => {
+  return {
+    server: { port: 3000 },
+    fmt,
+    lint,
+  };
+});
+"#;
+        assert!(has_config_key(cfg, "fmt").unwrap());
+        assert!(has_config_key(cfg, "lint").unwrap());
+        assert!(!has_config_key(cfg, "pack").unwrap());
+        assert!(!has_config_key(cfg, "staged").unwrap());
+    }
+
+    #[test]
+    fn test_has_config_key_shorthand_object_export() {
+        let cfg = r#"import { defineConfig } from 'vite-plus';
+
+const fmt = { singleQuote: true };
+
+export default defineConfig({
+  fmt,
+});
+"#;
+        assert!(has_config_key(cfg, "fmt").unwrap());
+        assert!(!has_config_key(cfg, "lint").unwrap());
+    }
+
+    #[test]
+    fn test_has_config_key_ignores_nested_shorthand() {
+        // `fmt` shorthand is nested inside a plugin's options object, not a
+        // top-level config key, so it must not count as present.
+        let cfg = r#"import { defineConfig } from 'vite-plus';
+
+export default defineConfig({
+  plugins: [somePlugin({ fmt })],
+});
+"#;
+        assert!(!has_config_key(cfg, "fmt").unwrap());
+    }
+
     #[test]
     fn test_has_config_key_fate_template_shape() {
         // Mirrors create-fate's drizzle template — the bug that motivated this fix.

packages/cli/snap-tests/create-monorepo-local-template-shorthand/package.json

@@ -0,0 +1,5 @@
+{
+  "name": "local-template-monorepo-fixture",
+  "private": true,
+  "packageManager": "pnpm@10.0.0"
+}

packages/cli/snap-tests/create-monorepo-local-template-shorthand/packages/starter-template/bin/index.mjs

@@ -0,0 +1,46 @@
+#!/usr/bin/env node
+// Minimal local template generator. Writes a package that declares its `fmt`
+// and `lint` config via shorthand properties, plus standalone Oxlint/Oxfmt
+// config files. `vp create` must merge-skip the standalone files instead of
+// injecting duplicate inline `fmt:`/`lint:` blocks into vite.config.ts (#1836).
+import { mkdirSync, writeFileSync } from 'node:fs';
+import path from 'node:path';
+
+const args = process.argv.slice(2);
+const dirFlag = args.indexOf('--directory');
+const dir = dirFlag !== -1 && args[dirFlag + 1] ? args[dirFlag + 1] : 'starter-app';
+
+mkdirSync(dir, { recursive: true });
+
+const write = (name, content) => writeFileSync(path.join(dir, name), content);
+
+write(
+  'package.json',
+  `${JSON.stringify({ name: path.basename(dir), version: '0.0.0', private: true }, null, 2)}\n`,
+);
+
+write(
+  'vite.config.ts',
+  `import { defineConfig } from 'vite-plus';
+
+import { fmt } from './tooling/format';
+import { lint } from './tooling/lint';
+
+export default defineConfig(({ mode }) => {
+  return {
+    server: { port: 3000 },
+    fmt,
+    lint,
+  };
+});
+`,
+);
+
+write('.oxlintrc.json', `${JSON.stringify({ rules: {} }, null, 2)}\n`);
+write('.oxfmtrc.json', `${JSON.stringify({}, null, 2)}\n`);
+
+mkdirSync(path.join(dir, 'tooling'), { recursive: true });
+writeFileSync(path.join(dir, 'tooling', 'format.ts'), 'export const fmt = { ignorePatterns: [] };\n');
+writeFileSync(path.join(dir, 'tooling', 'lint.ts'), 'export const lint = { rules: {} };\n');
+
+console.log(`cloned starter-template to ${dir}`);

packages/cli/snap-tests/create-monorepo-local-template-shorthand/packages/starter-template/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "starter-template",
+  "version": "0.0.0",
+  "private": true,
+  "description": "A local starter template that wires fmt/lint via shorthand.",
+  "type": "module",
+  "bin": "./bin/index.mjs"
+}

packages/cli/snap-tests/create-monorepo-local-template-shorthand/pnpm-workspace.yaml

@@ -0,0 +1,2 @@
+packages:
+  - packages/*

packages/cli/snap-tests/create-monorepo-local-template-shorthand/snap.txt

@@ -0,0 +1,36 @@
+> vp create starter --no-interactive --no-agent -- --directory my-app # run the local create.templates entry; generated pkg declares fmt/lint via shorthand
+
+Generating project…
+
+Running: node <cwd>/packages/starter-template/bin/index.mjs --directory my-app
+cloned starter-template to my-app
+
+Monorepo integration...
+
+lint config already present in packages/my-app/vite.config.ts — removed redundant packages/my-app/.oxlintrc.json
+
+fmt config already present in packages/my-app/vite.config.ts — removed redundant packages/my-app/.oxfmtrc.json
+
+Formatting code...
+
+Code formatted
+◇ Scaffolded packages/my-app
+• Node <semver>  pnpm <semver>
+→ Next: cd packages/my-app && vp run
+
+> cat packages/my-app/vite.config.ts # fmt/lint stay shorthand only, no injected duplicate inline fmt:/lint: blocks (#1836)
+import { defineConfig } from "vite-plus";
+
+import { fmt } from "./tooling/format";
+import { lint } from "./tooling/lint";
+
+export default defineConfig(({ mode }) => {
+  return {
+    server: { port: 3000 },
+    fmt,
+    lint,
+  };
+});
+
+> test ! -f packages/my-app/.oxlintrc.json # standalone lint config merge-skipped and removed
+> test ! -f packages/my-app/.oxfmtrc.json # standalone fmt config merge-skipped and removed

packages/cli/snap-tests/create-monorepo-local-template-shorthand/steps.json

@@ -0,0 +1,8 @@
+{
+  "commands": [
+    "vp create starter --no-interactive --no-agent -- --directory my-app # run the local create.templates entry; generated pkg declares fmt/lint via shorthand",
+    "cat packages/my-app/vite.config.ts # fmt/lint stay shorthand only, no injected duplicate inline fmt:/lint: blocks (#1836)",
+    "test ! -f packages/my-app/.oxlintrc.json # standalone lint config merge-skipped and removed",
+    "test ! -f packages/my-app/.oxfmtrc.json # standalone fmt config merge-skipped and removed"
+  ]
+}

packages/cli/snap-tests/create-monorepo-local-template-shorthand/vite.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from 'vite-plus';
+
+export default defineConfig({
+  create: {
+    templates: [
+      {
+        name: 'starter',
+        description: 'A local starter template that wires fmt/lint via shorthand.',
+        template: './packages/starter-template',
+      },
+    ],
+  },
+});

packages/cli/snap-tests/migration-inline-config-shorthand/package.json

@@ -0,0 +1,9 @@
+{
+  "name": "migration-inline-config-shorthand",
+  "version": "0.0.0",
+  "private": true,
+  "devDependencies": {
+    "oxfmt": "1",
+    "oxlint": "1"
+  }
+}

packages/cli/snap-tests/migration-inline-config-shorthand/snap.txt

@@ -0,0 +1,22 @@
+> vp migrate --no-interactive --no-hooks 2>&1 # must NOT duplicate fmt/lint already declared as shorthand properties (#1836)
+◇ Migrated . to Vite+
+• Node <semver>  pnpm <semver>
+
+> cat vite.config.ts # fmt/lint stay as shorthand only, no injected inline fmt:/lint: blocks
+import { defineConfig } from 'vite-plus';
+
+// Mirrors a custom template that keeps tooling config in separate modules and
+// wires them in with shorthand properties (`fmt,` / `lint,`). See #1836.
+const fmt = { ignorePatterns: [] };
+const lint = { rules: {} };
+
+export default defineConfig(({ mode }) => {
+  return {
+    server: { port: 3000 },
+    fmt,
+    lint,
+  };
+});
+
+> test ! -f .oxlintrc.json # no standalone lint config generated
+> test ! -f .oxfmtrc.json # no standalone fmt config generated