| [`contexts`](#targetcontexts)                   | Map     | Additional build contexts                                            |
| [`description`](#targetdescription)             | String  | Description of a target                                              |
| [`dockerfile-inline`](#targetdockerfile-inline) | String  | Inline Dockerfile string                                             |
| [`dockerfile`](#targetdockerfile)               | String  | Dockerfile location                                                  |
| [`inherits`](#targetinherits)                   | List    | Inherit attributes from other targets                                |
| [`labels`](#targetlabels)                       | Map     | Metadata for images                                                  |
| [`matrix`](#targetmatrix)                       | Map     | Define a set of variables that forks a target into multiple targets. |
| [`name`](#targetname)                           | String  | Override the target name when using a matrix.                        |
| [`no-cache-filter`](#targetno-cache-filter)     | List    | Disable build cache for specific stages                              |
| [`no-cache`](#targetno-cache)                   | Boolean | Disable build cache completely                                       |
| [`output`](#targetoutput)                       | List    | Output destinations                                                  |
| [`platforms`](#targetplatforms)                 | List    | Target platforms                                                     |
| [`pull`](#targetpull)                           | Boolean | Always pull images                                                   |
| [`secret`](#targetsecret)                       | List    | Secrets to expose to the build                                       |
| [`shm-size`](#targetshm-size)                   | List    | Size of `/dev/shm`                                                   |
| [`ssh`](#targetssh)                             | List    | SSH agent sockets or keys to expose to the build                     |
| [`tags`](#targettags)                           | List    | Image names and tags                                                 |
| [`target`](#targettarget)                       | String  | Target build stage                                                   |
| [`ulimits`](#targetulimits)                     | List    | Ulimit options                                                       |

### `target.args`

Use the `args` attribute to define build arguments for the target.
This has the same effect as passing a [`--build-arg`][build-arg] flag to the build command.

```hcl
target "default" {
  args = {
    VERSION = "0.0.0+unknown"
  }
}
```

You can set `args` attributes to use `null` values.
Doing so forces the `target` to use the `ARG` value specified in the Dockerfile.

```hcl
variable "GO_VERSION" {
  default = "1.20.3"
}

target "webapp" {
  dockerfile = "webapp.Dockerfile"
  tags = ["docker.io/username/webapp"]
}

target "db" {
  args = {
    GO_VERSION = null
  }
  dockerfile = "db.Dockerfile"
  tags = ["docker.io/username/db"]
}
```

### `target.annotations`

The `annotations` attribute lets you add annotations to images built with bake.
The key takes a list of annotations, in the format of `KEY=VALUE`.

```hcl
target "default" {
  output = [{ type = "image", name = "foo" }]
  annotations = ["org.opencontainers.image.authors=dvdksn"]
}
```

By default, the annotation is added to image manifests. You can configure the
level of the annotations by adding a prefix to the annotation, containing a
comma-separated list of all the levels that you want to annotate. The following
example adds annotations to both the image index and manifests.

```hcl
target "default" {
  output = [
    {
      type = "image"
      name = "foo"
    }
  ]
  annotations = ["index,manifest:org.opencontainers.image.authors=dvdksn"]
}
```

Read about the supported levels in