deprecate install input

.github/workflows/ci.yml

@@ -115,22 +115,6 @@ jobs:
           context: .
           platforms: linux/amd64,linux/arm64,linux/ppc64le
 
-  install:
-    runs-on: ubuntu-latest
-    steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v6
-      -
-        name: Set up Docker Buildx
-        uses: ./
-        with:
-          install: true
-      -
-        name: Check cmd
-        run: |
-          docker build --help
-
   use:
     runs-on: ubuntu-latest
     strategy:

README.md

@@ -94,7 +94,7 @@ The following inputs can be used as `step.with` keys:
 | `buildkitd-flags`            | String   |                    | [BuildKit daemon flags](https://docs.docker.com/engine/reference/commandline/buildx_create/#buildkitd-flags)                                                                |
 | `buildkitd-config` \*        | String   |                    | [BuildKit daemon config file](https://docs.docker.com/engine/reference/commandline/buildx_create/#config)                                                                   |
 | `buildkitd-config-inline` \* | String   |                    | Same as `buildkitd-config` but inline                                                                                                                                       |
-| `install`                    | Bool     | `false`            | Sets up `docker build` command as an alias to `docker buildx`                                                                                                               |
+| `install` \*                 | Bool     | `false`            | Sets up `docker build` command as an alias to `docker buildx`                                                                                                               |
 | `use`                        | Bool     | `true`             | Switch to this builder instance                                                                                                                                             |
 | `endpoint`                   | String   |                    | [Optional address for docker socket](https://docs.docker.com/engine/reference/commandline/buildx_create/#description) or context from `docker context ls`                   |
 | `platforms`                  | List/CSV |                    | Fixed [platforms](https://docs.docker.com/engine/reference/commandline/buildx_create/#platform) for current node. If not empty, values take priority over the detected ones |
@@ -111,6 +111,14 @@ The following inputs can be used as `step.with` keys:
 > [!NOTE]
 > `buildkitd-config` and `buildkitd-config-inline` are mutually exclusive.
 
+> [!NOTE]
+> `install` input is deprecated and will be removed in a future release. This
+>  input is not necessary when building with our actions like
+> `docker/build-push-action` or `docker/bake-action`. If you are still building
+> with the `docker build` command then you can set the `BUILDX_BUILDER`
+> environment variable, or you can just directly invoke the
+> `docker buildx build` command: https://github.com/docker/setup-buildx-action/pull/455
+
 ### outputs
 
 The following outputs are available:

action.yml

@@ -26,10 +26,6 @@ inputs:
   buildkitd-config-inline:
     description: 'Inline BuildKit daemon config'
     required: false
-  install:
-    description: 'Sets up docker build command as an alias to docker buildx build'
-    default: 'false'
-    required: false
   use:
     description: 'Switch to this builder instance'
     default: 'true'
@@ -58,7 +54,7 @@ inputs:
     description: 'Cleanup temp files and remove builder at the end of a job'
     default: 'true'
     required: false
-  # TODO: remove deprecated config and config-inline inputs
+  # TODO: remove deprecated config, config-inline and install inputs
   config:
     description: 'BuildKit daemon config file'
     deprecationMessage: 'Use buildkitd-config instead'
@@ -67,6 +63,11 @@ inputs:
     description: 'Inline BuildKit daemon config'
     deprecationMessage: 'Use buildkitd-config-inline instead'
     required: false
+  install:
+    description: 'Sets up docker build command as an alias to docker buildx build'
+    deprecationMessage: '"docker buildx install" command is deprecated and will be removed in a future release, use BUILDX_BUILDER environment variable instead'
+    default: 'false'
+    required: false
 
 outputs:
   name: