fix: Support reading STACKIT_SERVICE_CONNECTION_ID on Azure Pipelines

AUTHENTICATION.md

@@ -131,3 +131,5 @@ Using this flow is less secure since the token is long-lived. You can provide th
    # Optional: provide a file path containing the OIDC token
    STACKIT_FEDERATED_TOKEN_FILE=/path/to/oidc-token.jwt
    ```
+
+   When running in Azure DevOps with the [STACKIT Service Connection](https://marketplace.visualstudio.com/items?itemName=SchwarzDigits.stackit-service-connection), the CLI reads `STACKIT_SERVICE_CONNECTION_ID` and requests the OIDC token for that service connection.

internal/pkg/auth/oidc.go

@@ -17,6 +17,7 @@ const (
 	EnvGitHubRequestToken           = "ACTIONS_ID_TOKEN_REQUEST_TOKEN" //nolint:gosec // linter false positive
 	EnvAzureOIDCRequestURI          = "SYSTEM_OIDCREQUESTURI"
 	EnvAzureAccessToken             = "SYSTEM_ACCESSTOKEN" //nolint:gosec // linter false positive
+	EnvAzureServiceConnectionID     = "STACKIT_SERVICE_CONNECTION_ID"
 )
 
 func IsOIDCEnabled() bool {
@@ -40,7 +41,8 @@ func OIDCServiceAccountEmail() string {
 // TokenFunc returns the OIDCTokenFunc to use for Workload Identity Federation.
 // It checks the following token sources in order: STACKIT_SERVICE_ACCOUNT_FEDERATED_TOKEN,
 // STACKIT_FEDERATED_TOKEN_FILE, GitHub Actions (ACTIONS_ID_TOKEN_REQUEST_URL +
-// ACTIONS_ID_TOKEN_REQUEST_TOKEN), and Azure DevOps (SYSTEM_OIDCREQUESTURI + SYSTEM_ACCESSTOKEN).
+// ACTIONS_ID_TOKEN_REQUEST_TOKEN), and Azure DevOps (SYSTEM_OIDCREQUESTURI + SYSTEM_ACCESSTOKEN,
+// optionally scoped to the service connection set in STACKIT_SERVICE_CONNECTION_ID).
 // Returns an error if no source is detected.
 func OIDCTokenFunc() (oidcadapters.OIDCTokenFunc, error) {
 	// static token provided directly via env var
@@ -65,7 +67,7 @@ func OIDCTokenFunc() (oidcadapters.OIDCTokenFunc, error) {
 	// Azure DevOps
 	if adoURL := os.Getenv(EnvAzureOIDCRequestURI); adoURL != "" {
 		if adoToken := os.Getenv(EnvAzureAccessToken); adoToken != "" {
-			return oidcadapters.RequestAzureDevOpsOIDCToken(adoURL, adoToken, ""), nil
+			return oidcadapters.RequestAzureDevOpsOIDCToken(adoURL, adoToken, os.Getenv(EnvAzureServiceConnectionID)), nil
 		}
 	}
 

internal/pkg/auth/oidc_test.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
+	"net/url"
 	"testing"
 
 	"github.com/stackitcloud/stackit-cli/internal/pkg/auth"
@@ -169,6 +170,62 @@ func TestTokenFunc_AzureDevOps(t *testing.T) {
 	}
 }
 
+func TestTokenFunc_AzureDevOps_ServiceConnectionID(t *testing.T) {
+	tests := []struct {
+		description         string
+		serviceConnectionID string
+	}{
+		{
+			description:         "service connection id set",
+			serviceConnectionID: "my-service-connection-id",
+		},
+		{
+			description:         "service connection id unset",
+			serviceConnectionID: "",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.description, func(t *testing.T) {
+			var gotQuery url.Values
+			srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				gotQuery = r.URL.Query()
+				w.Header().Set("Content-Type", "application/json")
+				tok := "ado-oidc-token"
+				_ = json.NewEncoder(w).Encode(map[string]*string{"oidcToken": &tok})
+			}))
+			defer srv.Close()
+
+			t.Setenv(auth.EnvServiceAccountFederatedToken, "")
+			t.Setenv(auth.EnvFederatedTokenFile, "")
+			t.Setenv(auth.EnvGitHubRequestURL, "")
+			t.Setenv(auth.EnvGitHubRequestToken, "")
+			t.Setenv(auth.EnvAzureOIDCRequestURI, srv.URL)
+			t.Setenv(auth.EnvAzureAccessToken, "ado-access-token")
+			t.Setenv(auth.EnvAzureServiceConnectionID, tt.serviceConnectionID)
+
+			fn, err := auth.OIDCTokenFunc()
+			if err != nil {
+				t.Fatalf("OIDCTokenFunc() unexpected error: %v", err)
+			}
+			if _, err := fn(context.Background()); err != nil {
+				t.Fatalf("fn() unexpected error: %v", err)
+			}
+
+			got, ok := gotQuery["serviceConnectionId"]
+			if tt.serviceConnectionID == "" {
+				if ok {
+					t.Errorf("serviceConnectionId query param = %q, want it absent", got)
+				}
+				return
+			}
+			if !ok || len(got) != 1 || got[0] != tt.serviceConnectionID {
+				t.Errorf("serviceConnectionId query param = %q, want %q", got, tt.serviceConnectionID)
+			}
+		})
+	}
+}
+
 func TestTokenFunc_NoSource(t *testing.T) {
 	// All env vars absent → must return an actionable error, no panic.
 	t.Setenv(auth.EnvServiceAccountFederatedToken, "")