fix(build): make outDir from cli work properly

closes #2716

docs/reference/cli.md

@@ -16,14 +16,14 @@ vitepress dev [root]
 
 ### Options
 
-| Option | Description |
-| -      | -           |
-| `--open [path]`          | Open browser on startup (`boolean \| string`) |
-| `--port <port>`          | Specify port (`number`) |
-| `--base <path>`          | Public base path (default: `/`) (`string`) |
-| `--cors`                 | Enable CORS |
-| `--strictPort`           | Exit if specified port is already in use (`boolean`) |
-| `--force`                | Force the optimizer to ignore the cache and re-bundle (`boolean`) |
+| Option          | Description                                                       |
+| --------------- | ----------------------------------------------------------------- |
+| `--open [path]` | Open browser on startup (`boolean \| string`)                     |
+| `--port <port>` | Specify port (`number`)                                           |
+| `--base <path>` | Public base path (default: `/`) (`string`)                        |
+| `--cors`        | Enable CORS                                                       |
+| `--strictPort`  | Exit if specified port is already in use (`boolean`)              |
+| `--force`       | Force the optimizer to ignore the cache and re-bundle (`boolean`) |
 
 ## `vitepress build`
 
@@ -37,14 +37,14 @@ vitepress build [root]
 
 ### Options
 
-| Option | Description |
-| -      | -           |
-| `--mpa` (experimental) | Build in [MPA mode](../guide/mpa-mode) without client-side hydration (`boolean`) |
-| `--base <path>`          | Public base path (default: `/`) (`string`) |
-| `--target <target>`            | Transpile target (default: `"modules"`) (`string`) |
-| `--outDir <dir>`          | Output directory (default: `.vitepress/dist`) (`string`) |
+| Option                         | Description                                                                                                         |
+| ------------------------------ | ------------------------------------------------------------------------------------------------------------------- |
+| `--mpa` (experimental)         | Build in [MPA mode](../guide/mpa-mode) without client-side hydration (`boolean`)                                    |
+| `--base <path>`                | Public base path (default: `/`) (`string`)                                                                          |
+| `--target <target>`            | Transpile target (default: `"modules"`) (`string`)                                                                  |
+| `--outDir <dir>`               | Output directory relative to **cwd** (default: `<root>/.vitepress/dist`) (`string`)                                 |
 | `--minify [minifier]`          | Enable/disable minification, or specify minifier to use (default: `"esbuild"`) (`boolean \| "terser" \| "esbuild"`) |
-| `--assetsInlineLimit <number>` | Static asset base64 inline threshold in bytes (default: `4096`) (`number`) |
+| `--assetsInlineLimit <number>` | Static asset base64 inline threshold in bytes (default: `4096`) (`number`)                                          |
 
 ## `vitepress preview`
 
@@ -58,10 +58,10 @@ vitepress preview [root]
 
 ### Options
 
-| Option | Description |
-| -      | -           |
-| `--base <path>`          | Public base path (default: `/`) (`string`) |
-| `--port <port>`          | Specify port (`number`) |
+| Option          | Description                                |
+| --------------- | ------------------------------------------ |
+| `--base <path>` | Public base path (default: `/`) (`string`) |
+| `--port <port>` | Specify port (`number`)                    |
 
 ## `vitepress init`
 

src/node/build/build.ts

@@ -35,6 +35,11 @@ export async function build(
     delete buildOptions.mpa
   }
 
+  if (buildOptions.outDir) {
+    siteConfig.outDir = path.resolve(process.cwd(), buildOptions.outDir)
+    delete buildOptions.outDir
+  }
+
   try {
     const { clientResult, serverResult, pageToHashMap } = await bundle(
       siteConfig,

src/node/build/bundle.ts

@@ -76,7 +76,7 @@ export async function bundle(
         : typeof options.minify === 'boolean'
         ? options.minify
         : !process.env.DEBUG,
-      outDir: ssr ? config.tempDir : options.outDir || config.outDir,
+      outDir: ssr ? config.tempDir : config.outDir,
       cssCodeSplit: false,
       rollupOptions: {
         ...rollupOptions,