ci: measure all the open CI changes together (do not merge)

.github/actions/environment/action.yml

@@ -1,5 +1,10 @@
 name: Setup Environment
 description: Sets env vars and installs dependencies
+inputs:
+  solution-filter:
+    description: The solution filter the job builds, so only the workloads its projects need are installed. Without one, every project in Sentry.slnx counts.
+    required: false
+    default: ''
 runs:
   using: composite
 
@@ -39,37 +44,20 @@ runs:
 
     # Java 21 is needed by .NET Android
     - name: Install Java 21
-      if: ${{ !matrix.container }}
+      if: ${{ !matrix.container && env.NO_MOBILE != 'true' }}
       uses: actions/setup-java@de7274f081f381c8f8158605e0321c36c376e2e6 # v6.0.1
       with:
         distribution: temurin
         java-version: '21'
 
     - name: Setup Android SDK
-      if: ${{ !matrix.container }}
+      if: ${{ !matrix.container && env.NO_MOBILE != 'true' }}
       uses: android-actions/setup-android@be39fa834029ff78f1a44aa3bb0819b8fc2bd8fd # v4.0.4
       with:
         # Exclude "tools" because the emulator is not needed (nor available for Windows/Linux ARM64)
         packages: platform-tools platforms;android-35 platforms;android-36 build-tools;36.0.0
         log-accepted-android-sdk-licenses: false
 
-    - name: Install Mono (macOS)
-      if: runner.os == 'macOS'
-      shell: bash
-      # Attempt to install Mono, allowing it to fail silently
-      # Then ensure mono is correctly linked, overwriting any conflicting symlinks
-      run: |
-        brew install mono || true
-        brew link --overwrite mono
-
-    - name: Install Mono (Ubuntu)
-      if: ${{ runner.os == 'Linux' && !matrix.container }}
-      shell: bash
-      run: |
-        sudo apt install -y mono-devel
-        # restore perms for actions/setup-dotnet
-        sudo chmod -R a+rw /usr/share/dotnet
-
     - name: Install .NET SDK
       uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
       with:
@@ -90,11 +78,25 @@ runs:
       run: |
         set -euo pipefail
         pwd
-        dotnet workload restore \
-          --temp-dir "${{ runner.temp }}" \
-          --skip-sign-check
-        dotnet workload restore test/AndroidTestApp/AndroidTestApp.csproj \
-          --temp-dir "${{ runner.temp }}" \
-          --skip-sign-check
-        # Restore the Android test app explicitly to ensure runtime packs are available
-        dotnet restore test/AndroidTestApp/AndroidTestApp.csproj -r android-x64 --nologo || true
+        filter="${{ inputs.solution-filter }}"
+        if [[ -n "$filter" ]]; then
+          # dotnet workload restore doesn't accept a solution filter, but it accepts the projects in one
+          projects=$(grep -o '"[^"]*\.csproj"' "$filter" | tr -d '"' | sed 's#\\\\#/#g' || true)
+          if [[ -z "$projects" ]]; then
+            echo "::error::Found no projects in $filter, so there are no workloads to restore"
+            exit 1
+          fi
+          echo "$projects" | xargs dotnet workload restore --temp-dir "${{ runner.temp }}" --skip-sign-check
+        else
+          dotnet workload restore \
+            --temp-dir "${{ runner.temp }}" \
+            --skip-sign-check
+        fi
+        # Sentry.Android.AssemblyReader.Tests builds the Android test app. The Windows solution filters exclude both.
+        if [[ "$RUNNER_OS" != "Windows" ]] && { [[ -z "$filter" ]] || grep -q 'Sentry.Android.AssemblyReader.Tests' "$filter"; }; then
+          dotnet workload restore test/AndroidTestApp/AndroidTestApp.csproj \
+            --temp-dir "${{ runner.temp }}" \
+            --skip-sign-check
+          # Restore the Android test app explicitly to ensure runtime packs are available
+          dotnet restore test/AndroidTestApp/AndroidTestApp.csproj -r android-x64 --nologo || true
+        fi

.github/actions/windows-dotnet-drive/action.yml

@@ -0,0 +1,42 @@
+name: Windows .NET drive
+description: Installs .NET and the NuGet packages on a fast drive on Windows runners
+runs:
+  using: composite
+
+  steps:
+    # The Windows images keep .NET under Program Files, where workloads install as MSI packages, and the NuGet cache
+    # in the user profile on C:. So .NET goes next to the workspace, where workloads install as plain files. The x64
+    # runners put the workspace on D:, so the NuGet packages go there too. The arm64 runners only have C:, so the
+    # NuGet packages and TEMP go on a Dev Drive there. Defender already excludes C:\ on these images.
+    - name: Install .NET and NuGet packages on a fast drive
+      shell: pwsh
+      run: |
+        $root = Split-Path $env:GITHUB_WORKSPACE
+        "DOTNET_INSTALL_DIR=$root\.dotnet" >> $env:GITHUB_ENV
+        if ($root.StartsWith('C:'))
+        {
+            # Only volumes mounted after this get no antivirus filters
+            fsutil devdrv enable /disallowAv | Out-Host
+            'create vdisk file="C:\devdrive.vhdx" maximum=81920 type=expandable', 'select vdisk file="C:\devdrive.vhdx"', 'attach vdisk', 'convert gpt', 'create partition primary' |
+                Set-Content "$env:RUNNER_TEMP\diskpart.txt"
+            diskpart /s "$env:RUNNER_TEMP\diskpart.txt" | Out-Host
+            if ($LASTEXITCODE -ne 0) { throw "diskpart failed with exit code $LASTEXITCODE" }
+            $partition = Get-DiskImage -ImagePath 'C:\devdrive.vhdx' | Get-Disk | Get-Partition | Where-Object Type -eq 'Basic'
+            $partition | Format-Volume -DevDrive -Confirm:$false -Force | Out-Host
+            $partition | Add-PartitionAccessPath -AccessPath 'X:\'
+            # Right after the mount, trust can fail with "Access is denied" while the volume is still in use
+            for ($attempt = 1; $attempt -le 5; $attempt++)
+            {
+                fsutil devdrv trust X: | Out-Host
+                if ($LASTEXITCODE -eq 0) { break }
+                Start-Sleep -Seconds 3
+            }
+            if ($LASTEXITCODE -ne 0) { Write-Warning "Couldn't mark X: as a trusted Dev Drive, so antivirus filters may still scan it" }
+            fsutil devdrv query X: | Out-Host
+            $root = 'X:'
+            New-Item -ItemType Directory "$root\tmp" | Out-Null
+            "TEMP=$root\tmp" >> $env:GITHUB_ENV
+            "TMP=$root\tmp" >> $env:GITHUB_ENV
+        }
+        "NUGET_PACKAGES=$root\.nuget\packages" >> $env:GITHUB_ENV
+        $global:LASTEXITCODE = 0