Remove os limitation

.github/workflows/ci.yml

@@ -43,3 +43,31 @@ jobs:
       -
         name: Dump context
         uses: crazy-max/ghaction-dump-context@v1
+
+  error:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Stop docker
+        run: |
+          sudo systemctl stop docker
+      -
+        name: Set up QEMU
+        id: qemu
+        continue-on-error: true
+        uses: ./
+      -
+        name: Check
+        run: |
+          echo "${{ toJson(steps.qemu) }}"
+          if [ "${{ steps.qemu.outcome }}" != "failure" ] || [ "${{ steps.qemu.conclusion }}" != "success" ]; then
+            echo "::error::Should have failed"
+            exit 1
+          fi
+      -
+        name: Dump context
+        if: always()
+        uses: crazy-max/ghaction-dump-context@v1

README.md

@@ -19,7 +19,6 @@ ___
 * [Customizing](#customizing)
   * [inputs](#inputs)
 * [Keep up-to-date with GitHub Dependabot](#keep-up-to-date-with-github-dependabot)
-* [Limitation](#limitation)
 
 ## Usage
 
@@ -82,7 +81,3 @@ updates:
     schedule:
       interval: "daily"
 ```
-
-## Limitation
-
-This action is only available for Linux [virtual environments](https://docs.github.com/en/actions/reference/virtual-environments-for-github-hosted-runners#supported-virtual-environments-and-hardware-resources).

src/main.ts

@@ -1,4 +1,3 @@
-import * as os from 'os';
 import * as mexec from './exec';
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
@@ -10,10 +9,10 @@ interface Platforms {
 
 async function run(): Promise<void> {
   try {
-    if (os.platform() !== 'linux') {
-      core.setFailed('Only supported on linux platform');
-      return;
-    }
+    core.startGroup(`Docker info`);
+    await exec.exec('docker', ['version']);
+    await exec.exec('docker', ['info']);
+    core.endGroup();
 
     const image: string = core.getInput('image') || 'tonistiigi/binfmt:latest';
     const platforms: string = core.getInput('platforms') || 'all';