Setup Github Actions (#29)

Doing this because macOS 11 Big Sur is available now:

https://github.blog/changelog/2021-08-16-github-actions-macos-11-big-sur-is-generally-available-on-github-hosted-runners/

Remove `mac` job from AzDO. We can rely on Github Actions for macOS CI.

.github/workflows/actions.yml

@@ -0,0 +1,43 @@
+name: Github Actions
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  mac:
+    runs-on: macos-11
+
+    env:
+      Configuration: Release
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: install .NET
+        uses: actions/setup-dotnet@v1
+        with:
+          dotnet-version: 6.0.100-preview.7.21379.14
+
+      - name: install .NET workloads
+        run: dotnet workload install android ios macos --verbosity diag
+
+      - name: install Xamarin.Android
+        run: |
+          dotnet tool update --global boots --version 1.0.4.624
+          boots https://dl.internalx.com/vsts-devdiv/Xamarin.Android/public/5045838/6.0.1xx-preview7/f38d0a639add19221694ad73f79c34d2c7c76948/xamarin.android-11.4.99.78.pkg
+
+      - name: build SDK
+        run: dotnet build Xamarin.Legacy.Sdk.sln -bl:bin/Xamarin.Legacy.Sdk.binlog
+
+      - name: build samples
+        run: dotnet build samples/samples.sln -bl:bin/samples.binlog
+
+      - name: artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: artifacts
+          path: bin
+          if-no-files-found: error

azure-pipelines.yml

@@ -26,8 +26,6 @@ variables:
     value: android ios macos
   - name: Xamarin.Android.Vsix
     value: https://dl.internalx.com/vsts-devdiv/Xamarin.Android/public/5045838/6.0.1xx-preview7/f38d0a639add19221694ad73f79c34d2c7c76948/signed/Xamarin.Android.Sdk-11.4.99.78.vsix
-  - name: Xamarin.Android.Pkg
-    value: https://dl.internalx.com/vsts-devdiv/Xamarin.Android/public/5045838/6.0.1xx-preview7/f38d0a639add19221694ad73f79c34d2c7c76948/xamarin.android-11.4.99.78.pkg
 
 jobs:
 
@@ -103,40 +101,6 @@ jobs:
       targetPath: bin
     condition: succeededOrFailed()
 
-- job: mac
-  pool:
-    vmImage: macOS-latest
-    demands: msbuild
-  variables:
-    DotNet.Root: /usr/local/share/dotnet/
-    DotNet.Tools: ~/.dotnet/tools
-  steps:
-  - script: echo '##vso[task.setvariable variable=JI_JAVA_HOME]$(JAVA_HOME_11_X64)'
-    displayName: set JI_JAVA_HOME
-  - bash: >
-      export PATH="$(DotNet.Root):$(DotNet.Tools):$PATH" &&
-      curl -L https://dot.net/v1/dotnet-install.sh > dotnet-install.sh &&
-      sh dotnet-install.sh --version $(DotNetVersion) --install-dir $DOTNET_ROOT --verbose &&
-      dotnet --list-sdks &&
-      echo "##vso[task.setvariable variable=PATH]$PATH"
-    displayName: install .NET $(DotNetVersion)
-  - bash: dotnet workload install $(DotNet.Workloads) --verbosity diag
-    displayName: install .NET workloads
-  - bash: >
-      dotnet tool update --global boots --version $(BootsVersion) &&
-      boots $(Xamarin.Android.Pkg)
-    displayName: install Xamarin.Android
-  - script: dotnet build Xamarin.Legacy.Sdk.sln -bl:$(System.DefaultWorkingDirectory)/bin/Xamarin.Legacy.Sdk.binlog
-    displayName: build SDK
-  - script: dotnet build samples/samples.sln -bl:$(System.DefaultWorkingDirectory)/bin/samples.binlog
-    displayName: build samples
-  - task: PublishPipelineArtifact@1
-    displayName: artifacts
-    inputs:
-      artifact: mac
-      targetPath: bin
-    condition: succeededOrFailed()
-
 - template: sign-artifacts/jobs/v2.yml@templates
   parameters:
     displayName: sign