[copilot] setup .github/workflows/copilot-setup-steps.yml (#10193)

Context: https://docs.github.com/en/copilot/customizing-copilot/customizing-the-development-environment-for-copilot-coding-agent

Setup `.github/workflows/copilot-setup-steps.yml`, which is a Github action
that runs (only on Ubuntu) prior to Copilot doing its work.

This makes Copilot more useful, as it has a locally cloned and built source tree
with all dependencies installed. Copilot will be able to run various commands
to achieve tasks as assigned.

Other changes:

* Ignore errors from `<GitCommitsInRange/>`

Copilot must keep some custom `git` history, as this command was failing during our build:

    > git log ^cfa4209..HEAD --oneline
fatal: bad revision '^cfa4209..HEAD'

We can ignore the error, and just use 0 for the commit range if this occurs.

* Our `android-deps` workload for provisioning Mono, can simply use:

    "android-deps": { "extends" : [ "microsoft-net-runtime-android" ] }

Previously, it was failing to install a non-existent pack on Linux:

    Installing pack Microsoft.NETCore.App.Runtime.AOT.linux-x64.Cross.android-x86 version 10.0.0-preview.6.25304.106...

Co-authored-by: Jonathan Peppers <jonathan.peppers@microsoft.com>

Author: Copilot

.github/workflows/copilot-setup-steps.yml

@@ -0,0 +1,34 @@
+name: "Copilot Setup Steps"
+
+on: workflow_dispatch
+
+jobs:
+  copilot-setup-steps:
+    runs-on: ubuntu-latest
+    timeout-minutes: 120
+    
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: '9.x'
+
+    - name: Run jenkins build
+      run: |
+        make jenkins PREPARE_CI=1 PREPARE_AUTOPROVISION=1 CONFIGURATION=Debug
+      timeout-minutes: 60
+
+    - name: Upload logs
+      uses: actions/upload-artifact@v4
+      if: failure()
+      with:
+        name: copilot-artifacts
+        path: |
+          bin/**/*.log
+          bin/**/*.binlog
+        retention-days: 30

build-tools/create-packs/ConfigureLocalWorkload.targets

@@ -90,11 +90,13 @@
         Targets="_GenerateXAWorkloadContent"
     />
 
-    <GetAndroidWorkloadExtends JsonFilePath="$(_LocalAndroidManifestFolder)WorkloadManifest.json">
+    <GetAndroidWorkloadExtends Condition="!$([MSBuild]::IsOSPlatform('linux'))" JsonFilePath="$(_LocalAndroidManifestFolder)WorkloadManifest.json">
       <Output TaskParameter="ExtendsElement" PropertyName="AndroidWorkloadExtendsElement" />
     </GetAndroidWorkloadExtends>
 
     <PropertyGroup>
+      <!-- Linux can fail to install "microsoft-net-runtime-android-aot" and Microsoft.NETCore.App.Runtime.AOT.linux-x64.Cross.android-x86 -->
+      <AndroidWorkloadExtendsElement Condition="$([MSBuild]::IsOSPlatform('linux'))">&quot;microsoft-net-runtime-android&quot;</AndroidWorkloadExtendsElement>
       <_EmptyWorkloadJsonContent>
 <![CDATA[
 {"version": "0.0.1", "workloads": { "android-deps": { "extends" : [ $(AndroidWorkloadExtendsElement) ] } } }

build-tools/scripts/XAVersionInfo.targets

@@ -40,6 +40,7 @@
       <Output TaskParameter="Commits"                 ItemName="_XAVersionCommit" />
     </GitBlame>
     <GitCommitsInRange
+        ContinueOnError="true"
         StartCommit="%(_XAVersionCommit.CommitHash)"
         WorkingDirectory="$(XamarinAndroidSourcePath)"
         ToolPath="$(GitToolPath)"
@@ -55,6 +56,7 @@
       <Output TaskParameter="Commits"                 ItemName="_PackVersionCommit" />
     </GitBlame>
     <GitCommitsInRange
+        ContinueOnError="true"
         StartCommit="%(_PackVersionCommit.CommitHash)"
         WorkingDirectory="$(XamarinAndroidSourcePath)"
         ToolPath="$(GitToolPath)"

build-tools/xa-prep-tasks/Xamarin.Android.BuildTools.PrepTasks/GitCommitsInRange.cs

@@ -32,6 +32,13 @@ public override bool Execute ()
 
 			base.Execute ();
 
+			// fatal: bad revision '^cfa4209..HEAD'
+			if (ExitCode == 128) {
+				Log.LogMessage (MessageImportance.Normal, $"git exited with code 128. Setting {nameof (CommitCount)} to 0.");
+				CommitCount = 0;
+				return true;
+			}
+
 			Log.LogMessage (MessageImportance.Low, $"  [Output] {nameof (CommitCount)}: {CommitCount}");
 
 			return !Log.HasLoggedErrors;