Fix Colima VM SSH hang issue by pinning QEMU to 9.0.2 (#40)

It seems like the most recent version of QEMU is causing the SSH server inside the Colima VM to not start, which hangs all builds (see #37). I'm not exactly sure why and debugging the situation inside the action runners is kinda difficult.

With this PR I am pinning QEMU to 9.0.2, which seems to work on the runner image `macos-13`. 

Unfortunately I couldn't make it work on the runner image `macos-12`. As this is a very old macOS version, I'm dropping support for it. If one day things get fixed, I might readd it as supported.

.github/workflows/test.yml

@@ -1,5 +1,5 @@
 on:
-  workflow_dispatch: 
+  workflow_dispatch:
   push:
     branches:
       - "main"
@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-12, macos-13]
+        os: [macos-13]
     name: A job to perform a self-test on this Github Action
     steps:
       # To use this repository's private action,

CHANGELOG.md

@@ -7,11 +7,20 @@ and this project adheres to [Semantic Versioning].
 
 ## [unreleased]
 
+### Fixed
+
+- Pin the version of QEMU to 9.0.2 to avoid an issue with version 9.1.0 that prevents the Colima VM from starting ([#40](https://github.com/douglascamata/setup-docker-macos-action/pull/40)).
+
+
+### Removed
+
+- Support for `macos-13` action runners has been removed as even with QEMU 9.0.2 the Colima VM fails to start. This might be readded in the future if the issue is fixed ([#40](https://github.com/douglascamata/setup-docker-macos-action/pull/40)).
+
 ## [v1-alpha.13] - 2024-03-18
 
 ### Fixed
 
-- Added workaround for Python conflict in Github Action runner images ([#34](https://github.com/douglascamata/setup-docker-macos-action/pull/34))
+- Added workaround for Python conflict in Github Action runner images ([#34](https://github.com/douglascamata/setup-docker-macos-action/pull/34)).
 
 ## [v1-alpha.12] - 2024-02-01
 

README.md

@@ -13,7 +13,6 @@ I intend this action to be kept as simple as possible:
 
 # Currently supported public runner images
 
-- `macos-12`
 - `macos-13`
 
 # ARM64 processors (M1, M2, M3 series) used on `macos-14` images are unsupported!

action.yml

@@ -105,23 +105,17 @@ runs:
         HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK: "1"
       run: |
         echo "::group::Installing QEMU, Docker client, and Docker Compose"
-        brew install docker docker-compose qemu 2>&1 | tee install.log
+        brew install docker docker-compose
+        # Installing QEMU 9.0.2 as a temporary workaround. Version 9.1.0 seems to be broken with Lima/Colima at the moment.
+        wget  https://raw.githubusercontent.com/Homebrew/homebrew-core/f1a9cf104a9a51779c7a532b658c490f69974839/Formula/q/qemu.rb
+        brew install qemu.rb 2>&1 | tee install.log
         echo "::endgroup::"
       shell: bash
     - name: Configure Docker Compose plugin
       run: |
         mkdir -p ~/.docker/cli-plugins
         ln -sfn "$(brew --prefix)/opt/docker-compose/bin/docker-compose" ~/.docker/cli-plugins/docker-compose
       shell: bash
-    - name: Check QEMU version
-      if: inputs.upgrade-qemu != 'true'
-      run: |
-        if grep -q "qemu 8.1.0 is already installed" install.log
-        then
-            echo "Detected broken QEMU bottle installed by brew, removing and reinstalling."
-            brew reinstall qemu
-        fi
-      shell: bash
     - name: Upgrade QEMU
       if: inputs.upgrade-qemu == 'true'
       env:
@@ -135,7 +129,7 @@ runs:
       run: |
         CPU_COUNT=$(sysctl -n hw.ncpu)
         MEMORY=$(sysctl hw.memsize | awk '{print $2/1024/1024/1024}')
-        COLIMA_ARGS="--cpu $CPU_COUNT --memory $MEMORY"
+        COLIMA_ARGS="--cpu $CPU_COUNT --memory $MEMORY --arch x86_64"
         if [ $COLIMA_NETWORK_ADDRESS == "true" ]
         then
           COLIMA_ARGS="$COLIMA_ARGS --network-address"