Install and configure docker buildx

.github/workflows/test.yml

@@ -60,6 +60,8 @@ jobs:
       - name: Log versions
         run: |
           echo "Docker client version: ${{ steps.docker.outputs.docker-client-version }}"
+          echo "Docker compose version: ${{ steps.docker.outputs.docker-compose-version }}"
+          echo "Docker buildx version: ${{ steps.docker.outputs.docker-buildx-version }}"
           echo "Colima version: ${{ steps.docker.outputs.colima-version }}"
 
   test-network-address:
@@ -139,4 +141,6 @@ jobs:
       - name: Log versions
         run: |
           echo "Docker client version: ${{ steps.docker.outputs.docker-client-version }}"
+          echo "Docker compose version: ${{ steps.docker.outputs.docker-compose-version }}"
+          echo "Docker buildx version: ${{ steps.docker.outputs.docker-buildx-version }}"
           echo "Colima version: ${{ steps.docker.outputs.colima-version }}"

CHANGELOG.md

@@ -7,6 +7,15 @@ and this project adheres to [Semantic Versioning].
 
 ## [Unreleased]
 
+### Added
+
+- Install Docker Buildx and configure it as a Docker CLI plugin ([#29](https://github.com/douglascamata/setup-docker-macos-action/issues/29)).
+- New `docker-buildx-version` output to expose the installed Docker Buildx version.
+
+### Changed
+
+- Use `brew --prefix <formula>` instead of `$(brew --prefix)/opt/<formula>` for more robust Homebrew path resolution across different macOS architectures and Homebrew layouts.
+
 ## [v1.0.2] - 2025-11-10
 
 ### Fixed

README.md

@@ -90,6 +90,10 @@ The version of the Docker client that was installed.
 
 The version of Docker Compose that was installed.
 
+### `docker-buildx-version`
+
+The version of Docker Buildx that was installed.
+
 ### Example
 
 ```yml
@@ -98,6 +102,7 @@ The version of Docker Compose that was installed.
     echo "Colima version: ${{ steps.setup-docker.outputs.colima-version }}"
     echo "Docker client version: ${{ steps.setup-docker.outputs.docker-client-version }}"
     echo "Docker compose version: ${{ steps.setup-docker.outputs.docker-compose-version }}"
+    echo "Docker buildx version: ${{ steps.setup-docker.outputs.docker-buildx-version }}"
 ```
 
 ## Known Issues

action.yml

@@ -26,6 +26,9 @@ outputs:
   docker-compose-version:
     value: ${{ steps.docker-compose-version.outputs.version }}
     description: Version of Docker Compose
+  docker-buildx-version:
+    value: ${{ steps.docker-buildx-version.outputs.version }}
+    description: Version of Docker Buildx
 runs:
   using: "composite"
   steps:
@@ -94,20 +97,21 @@ runs:
         install colima-$(uname)-$(uname -m) /usr/local/bin/colima
         echo "::endgroup::"
       shell: bash
-    - name: Install Docker client, and Docker Compose
+    - name: Install Docker client, Docker Compose, and Docker Buildx
       env:
         HOMEBREW_NO_AUTO_UPDATE: "1"
         HOMEBREW_NO_INSTALL_UPGRADE: "1"
         HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK: "1"
       run: |
-        echo "::group::Installing Docker client and Docker Compose"
-        brew install docker docker-compose
+        echo "::group::Installing Docker client, Docker Compose, and Docker Buildx"
+        brew install docker docker-compose docker-buildx
         echo "::endgroup::"
       shell: bash
-    - name: Configure Docker Compose plugin
+    - name: Configure Docker CLI plugins
       run: |
         mkdir -p ~/.docker/cli-plugins
-        ln -sfn "$(brew --prefix)/opt/docker-compose/bin/docker-compose" ~/.docker/cli-plugins/docker-compose
+        ln -sfn "$(brew --prefix docker-compose)/bin/docker-compose" ~/.docker/cli-plugins/docker-compose
+        ln -sfn "$(brew --prefix docker-buildx)/bin/docker-buildx" ~/.docker/cli-plugins/docker-buildx
       shell: bash
     - name: Start Colima
       env:
@@ -143,6 +147,13 @@ runs:
         docker compose version >> "$GITHUB_OUTPUT"
         echo "$EOF" >> "$GITHUB_OUTPUT"
       shell: bash
+    - id: docker-buildx-version
+      run: |
+        EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
+        echo "version<<$EOF" >> "$GITHUB_OUTPUT"
+        docker buildx version >> "$GITHUB_OUTPUT"
+        echo "$EOF" >> "$GITHUB_OUTPUT"
+      shell: bash
     - id: colima-version
       run: |
         EOF=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)