add TestMain wrapper in ctl

The TestMain wrapper gets us the fancy testhook stuff tracking whether we're
deallocating things as expected, and we probably want that.

ctl/main_test.go

@@ -0,0 +1,43 @@
+// Copyright 2020 Pilosa Corp.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ctl_test
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+	"testing"
+
+	_ "net/http/pprof"
+
+	"github.com/pilosa/pilosa/v2/testhook"
+)
+
+func TestMain(m *testing.M) {
+	l, err := net.Listen("tcp", ":0")
+	if err != nil {
+		panic(err)
+	}
+	port := l.Addr().(*net.TCPAddr).Port
+	fmt.Printf("pilosa/ctl TestMain: online stack-traces: curl http://localhost:%v/debug/pprof/goroutine?debug=2\n", port)
+	go func() {
+		err := http.Serve(l, nil)
+		if err != nil {
+			panic(err)
+		}
+	}()
+	testhook.RunTestsWithHooks(m)
+
+}