Add 'use' input

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

.github/workflows/setup-buildx-ci.yml

@@ -62,6 +62,28 @@ jobs:
         run: |
           docker build --help
 
+  use:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        use:
+          - true
+          - false
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2.3.1
+      -
+        name: Set up Docker Buildx
+        id: buildx
+        uses: ./setup-buildx/
+        with:
+          use: ${{ matrix.use }}
+      -
+        name: List builder instances
+        run: docker buildx ls
+
   driver:
     runs-on: ubuntu-latest
     strategy:

setup-buildx/README.md

@@ -94,6 +94,7 @@ Following inputs can be used as `step.with` keys
 | `driver`         | String  | `docker-container`  | Sets the [builder driver](https://github.com/docker/buildx#--driver-driver) to be used. |
 | `driver-opt`     | String  |                     | Passes additional [driver-specific options](https://github.com/docker/buildx#--driver-opt-options). e.g. `image=moby/buildkit:master` |
 | `install`        | Bool    | `false`             | Sets up `docker build` command as an alias to `docker buildx` |
+| `use`            | Bool    | `true`              | Switch to this builder instance |
 
 ### outputs
 

setup-buildx/action.yml

@@ -22,6 +22,10 @@ inputs:
     description: 'Sets up docker build command as an alias to docker buildx'
     default: 'false'
     required: false
+  use:
+    description: 'Switch to this builder instance'
+    default: 'true'
+    required: false
 
 outputs:
   platforms:

setup-buildx/src/main.ts

@@ -17,6 +17,8 @@ async function run(): Promise<void> {
     const driver: string = core.getInput('driver') || 'docker-container';
     const driverOpt: string = core.getInput('driver-opt');
     const install: boolean = /true/i.test(core.getInput('install'));
+    const use: boolean = /true/i.test(core.getInput('use'));
+
     const dockerConfigHome: string = process.env.DOCKER_CONFIG || path.join(os.homedir(), '.docker');
     await installer.buildx(buildxVer, dockerConfigHome);
 
@@ -27,16 +29,17 @@ async function run(): Promise<void> {
     let createArgs: Array<string> = [
       'buildx',
       'create',
-      '--use',
       '--name',
       `builder-${process.env.GITHUB_SHA}`,
       '--driver',
       driver
     ];
-
     if (driverOpt) {
       createArgs.push('--driver-opt', driverOpt);
     }
+    if (use) {
+      createArgs.push('--use');
+    }
 
     await exec.exec('docker', createArgs);