Check wether M1 detection works

Signed-off-by: Douglas Camata <[email protected]>

.github/workflows/test.yml

@@ -6,7 +6,11 @@ on:
 
 jobs:
   setup-docker:
-    runs-on: macos-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [macos-13, macos-14]
     name: A job to perform a self-test on this Github Action
     steps:
       # To use this repository's private action,

README.md

@@ -11,6 +11,15 @@ I intend this action to be kept as simple as possible:
 - No other OS will be supported.
 - Binaries will be downloaded directly from the source when possible.
 
+# M1, M2, M3 series are unsupported!
+
+Yes, exactly what you just read. These processors do not support nested
+virtualization. This means Colima can't start the VM to run Docker.
+
+I'm sorry, but there's nothing I can do about it. All we can do is wait until
+an M-series processor supports it and Github adopts such processors for action
+runners.
+
 ## Features
 
 - Safety check to ensure the action is running in macOS.

action.yml

@@ -30,12 +30,18 @@ outputs:
 runs:
   using: "composite"
   steps:
-    - name: Safety check
+    - name: OS safety check
       if: runner.os != 'macOS'
       run: |
         echo "Not a macOS runner, exiting."
         exit 1
       shell: bash
+    - name: M-series safety check
+      if: matrix.os == 'macos-14'
+      run: |
+        echo "Detected M-series processor runner without nested virtualization support, exiting."
+        exit 1
+      shell: bash
     - name: Update Homebrew
       run: |
         echo "::group::Updating Homebrew"