Use Cake 7 OIDC workload identity for Azure instead of client secret

.github/workflows/build.yml

@@ -22,9 +22,6 @@ jobs:
         os: [windows-latest, ubuntu-latest, macos-latest]
     env:
       TRUSTED_INGEST: ${{ (github.event_name == 'push' || github.event_name == 'workflow_dispatch') && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/develop') }}
-      AZURE_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
-      AZURE_TENANT_ID: ${{ secrets.AZURE_TENANT_ID }}
-      AZURE_SUBSCRIPTION_ID: ${{ secrets.AZURE_SUBSCRIPTION_ID }}
     steps:
       - name: Get the sources
         uses: actions/checkout@v7
@@ -48,14 +45,6 @@ jobs:
         with:
           user: ${{ secrets.NUGET_USER }}
 
-      - name: Azure login
-        if: ${{ env.TRUSTED_INGEST == 'true' && env.AZURE_CLIENT_ID != '' && env.AZURE_TENANT_ID != '' && env.AZURE_SUBSCRIPTION_ID != '' }}
-        uses: azure/login@v3
-        with:
-          client-id: ${{ env.AZURE_CLIENT_ID }}
-          tenant-id: ${{ env.AZURE_TENANT_ID }}
-          subscription-id: ${{ env.AZURE_SUBSCRIPTION_ID }}
-
       - name: Run Cake script
         uses: cake-build/cake-action@v3
         env:
@@ -65,11 +54,10 @@ jobs:
           NUGET_SOURCE: ${{ secrets.NUGET_SOURCE }}
           NUGET_APIKEY: ${{ steps.login.outputs.NUGET_API_KEY }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          AZURE_TENANT_ID: ${{ secrets.AZURE_TENANT_ID }}
-          AZURE_CLIENT_ID: ${{ secrets.AZURE_CLIENT_ID }}
-          AZURE_CLIENT_SECRET: ${{ secrets.AZURE_CLIENT_SECRET }}
+          AZURE_TENANT_ID: ${{ env.TRUSTED_INGEST == 'true' && secrets.AZURE_TENANT_ID || '' }}
+          AZURE_CLIENT_ID: ${{ env.TRUSTED_INGEST == 'true' && secrets.AZURE_CLIENT_ID || '' }}
           AZURE_AUTHORITY_HOST: "https://login.microsoftonline.com"
-          AZURE_STORAGE_ACCOUNT: ${{ secrets.AZURE_STORAGE_ACCOUNT }}
+          AZURE_STORAGE_ACCOUNT: ${{ env.TRUSTED_INGEST == 'true' && secrets.AZURE_STORAGE_ACCOUNT || '' }}
           AZURE_STORAGE_ACCOUNT_CONTAINER: ${{ secrets.AZURE_STORAGE_ACCOUNT_CONTAINER }}${{ matrix.os }}
         with:
           file-path: cake.cs

build/records.cs

@@ -61,10 +61,14 @@ public bool ShouldReportDPI() =>
 
     public string? AzureStorageAccountContainer { get; } = System.Environment.GetEnvironmentVariable("AZURE_STORAGE_ACCOUNT_CONTAINER");
 
+    public bool ShouldPrepareAzureWorkloadIdentity() => GitHubActions.IsRunningOnGitHubActions &&
+                                                        AzureCredentials.WorkloadIdentitySpecified;
+
     public bool ShouldRunIntegrationTests() =>  !string.IsNullOrWhiteSpace(AzureStorageAccount) &&
                                                 !string.IsNullOrWhiteSpace(AzureStorageAccountContainer) &&
                                                 (
                                                     AzureCredentials.AzureCredentialsSpecified ||
+                                                    ShouldPrepareAzureWorkloadIdentity() ||
                                                     IsLocalBuild
                                                 );
 }
@@ -80,6 +84,10 @@ public record AzureCredentials(
                                                      !string.IsNullOrWhiteSpace(ClientId) &&
                                                      !string.IsNullOrWhiteSpace(ClientSecret) &&
                                                      !string.IsNullOrWhiteSpace(AuthorityHost);
+
+    public bool WorkloadIdentitySpecified { get; } = !string.IsNullOrWhiteSpace(TenantId) &&
+                                                     !string.IsNullOrWhiteSpace(ClientId) &&
+                                                     string.IsNullOrWhiteSpace(ClientSecret);
 }
 internal record ExtensionHelper(Func<string, CakeTaskBuilder> TaskCreate, Func<CakeReport> Run);
 

cake.cs

@@ -85,8 +85,23 @@
     )
 .Then("DPI")
     .Does<BuildData>(
-        static (context, data) => Command(
-                ["dpi", "dpi.exe"],
+        static async (context, data) => {
+            var workload = data.ShouldReportDPI() && data.ShouldPrepareAzureWorkloadIdentity()
+                            ? await GitHubActions.Commands.AzurePrepareWorkloadIdentity(data.AzureCredentials.TenantId!, data.AzureCredentials.ClientId!)
+                            : null;
+
+            Command(
+                new CommandSettings {
+                    ToolName = "dpi",
+                    ToolExecutableNames = ["dpi", "dpi.exe"],
+                    EnvironmentVariables = workload is null
+                        ? new Dictionary<string, string>()
+                        : new Dictionary<string, string> {
+                            ["AZURE_TENANT_ID"] = workload.TenantId,
+                            ["AZURE_CLIENT_ID"] = workload.ClientId,
+                            ["AZURE_FEDERATED_TOKEN_FILE"] = workload.FederatedTokenFile.FullPath
+                        }
+                },
                 new ProcessArgumentBuilder()
                     .Append("nuget")
                     .Append("--silent")
@@ -97,8 +112,8 @@
                             : "analyze"
                         )
                     .AppendSwitchQuoted("--buildversion", data.Version)
-                
-            )
+            );
+        }
     )
 .Then("Build")
     .Does<BuildData>(