Add GitLab Duo auth and executor support

sdk/auth/gitlab_test.go

@@ -0,0 +1,66 @@
+package auth
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
+)
+
+func TestGitLabAuthenticatorLoginPAT(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/api/v4/user":
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"id":       42,
+				"username": "duo-user",
+				"email":    "duo@example.com",
+				"name":     "Duo User",
+			})
+		case "/api/v4/personal_access_tokens/self":
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"id":     5,
+				"name":   "CLIProxyAPI",
+				"scopes": []string{"api"},
+			})
+		case "/api/v4/code_suggestions/direct_access":
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"base_url":   "https://cloud.gitlab.example.com",
+				"token":      "gateway-token",
+				"expires_at": 1710003600,
+				"headers":    map[string]string{"X-Gitlab-Realm": "saas"},
+				"model_details": map[string]any{
+					"model_provider": "anthropic",
+					"model_name":     "claude-sonnet-4-5",
+				},
+			})
+		default:
+			t.Fatalf("unexpected path %q", r.URL.Path)
+		}
+	}))
+	defer srv.Close()
+
+	authenticator := NewGitLabAuthenticator()
+	record, err := authenticator.Login(context.Background(), &config.Config{}, &LoginOptions{
+		Metadata: map[string]string{
+			"login_mode":            "pat",
+			"base_url":              srv.URL,
+			"personal_access_token": "glpat-test-token",
+		},
+	})
+	if err != nil {
+		t.Fatalf("Login() error = %v", err)
+	}
+	if record.Provider != "gitlab" {
+		t.Fatalf("expected gitlab provider, got %q", record.Provider)
+	}
+	if got := record.Metadata["model_name"]; got != "claude-sonnet-4-5" {
+		t.Fatalf("expected discovered model, got %#v", got)
+	}
+	if got := record.Metadata["auth_kind"]; got != "personal_access_token" {
+		t.Fatalf("expected personal_access_token auth kind, got %#v", got)
+	}
+}