Once again, use native Ginkgo test runner instead of cmd/e2e.

This commit deletes cmd/e2e and updates hack/ginkgo-e2e.sh to use the
'ginkgo' command instead. All logic from cmd/e2e/e2e.go and
test/e2e/driver.go have been combined into the new file
test/e2e/e2e_test.go.

The test tarball now includes a built version of the test/e2e test
binary, which includes all tests under test/e2e. This was accomplished
by updating the build scripts to use 'go test -c' when a target name
ended with '.test', and adding a dependency on test/e2e/e2e.test.

This prebuilt test binary is passed to the Ginkgo runner in
hack/ginkgo-e2e.sh. In a future change, we can add support to run
Ginkgo against the source tree if it is available.

This change is generally intended to have no externally visible changes,
aside from the following caveats:
 - The -t/--tests flag has been removed
 - Calling cmd/e2e/e2e directly obviously won't work, but that was never
   intended to be supported anyway
 - If the GINKGO_PARALLEL environment variable is set to y, then ginkgo
   will run test specs in parallel. (Currently defaults to n, since some
   tests are broken in this mode.)

Additionally, several tests which made poor assumptions about cwd or
used testContext before it had been set have been fixed.

test/e2e/e2e_test.go

@@ -0,0 +1,111 @@
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+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 e2e
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"path"
+	goruntime "runtime"
+	"strings"
+	"testing"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/client/clientcmd"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
+	"github.com/golang/glog"
+	"github.com/onsi/ginkgo"
+	"github.com/onsi/ginkgo/config"
+	"github.com/onsi/ginkgo/reporters"
+	"github.com/onsi/gomega"
+)
+
+var (
+	cloudConfig = &testContext.CloudConfig
+
+	reportDir = flag.String("report-dir", "", "Path to the directory where the JUnit XML reports should be saved. Default is empty, which doesn't generate these reports.")
+)
+
+func init() {
+	// Turn on verbose by default to get spec names
+	config.DefaultReporterConfig.Verbose = true
+
+	// Turn on EmitSpecProgress to get spec progress (especially on interrupt)
+	config.GinkgoConfig.EmitSpecProgress = true
+
+	// Randomize specs as well as suites
+	config.GinkgoConfig.RandomizeAllSpecs = true
+
+	flag.StringVar(&testContext.KubeConfig, clientcmd.RecommendedConfigPathFlag, "", "Path to kubeconfig containing embeded authinfo.")
+	flag.StringVar(&testContext.KubeContext, clientcmd.FlagContext, "", "kubeconfig context to use/override. If unset, will use value from 'current-context'")
+	flag.StringVar(&testContext.CertDir, "cert-dir", "", "Path to the directory containing the certs. Default is empty, which doesn't use certs.")
+	flag.StringVar(&testContext.Host, "host", "", "The host, or apiserver, to connect to")
+	flag.StringVar(&testContext.RepoRoot, "repo-root", "../../", "Root directory of kubernetes repository, for finding test files.")
+	flag.StringVar(&testContext.Provider, "provider", "", "The name of the Kubernetes provider (gce, gke, local, vagrant, etc.)")
+
+	// TODO: Flags per provider?  Rename gce-project/gce-zone?
+	flag.StringVar(&cloudConfig.MasterName, "kube-master", "", "Name of the kubernetes master. Only required if provider is gce or gke")
+	flag.StringVar(&cloudConfig.ProjectID, "gce-project", "", "The GCE project being used, if applicable")
+	flag.StringVar(&cloudConfig.Zone, "gce-zone", "", "GCE zone being used, if applicable")
+}
+
+func TestE2E(t *testing.T) {
+	defer util.FlushLogs()
+
+	// Disable density test unless it's explicitly requested.
+	if config.GinkgoConfig.FocusString == "" && config.GinkgoConfig.SkipString == "" {
+		config.GinkgoConfig.SkipString = "Skipped"
+	}
+
+	gomega.RegisterFailHandler(ginkgo.Fail)
+	// Run tests through the Ginkgo runner with output to console + JUnit for Jenkins
+	var r []ginkgo.Reporter
+	if *reportDir != "" {
+		r = append(r, reporters.NewJUnitReporter(path.Join(*reportDir, fmt.Sprintf("junit_%02d.xml", config.GinkgoConfig.ParallelNode))))
+	}
+	ginkgo.RunSpecsWithDefaultAndCustomReporters(t, "Kubernetes e2e suite", r)
+}
+
+func TestMain(m *testing.M) {
+	flag.Parse()
+	util.ReallyCrash = true
+	util.InitLogs()
+	goruntime.GOMAXPROCS(goruntime.NumCPU())
+
+	// TODO: possibly clean up or refactor this functionality.
+	if testContext.Provider == "" {
+		glog.Info("The --provider flag is not set.  Treating as a conformance test.  Some tests may not be run.")
+		os.Exit(1)
+	}
+
+	if testContext.Provider == "aws" {
+		awsConfig := "[Global]\n"
+		if cloudConfig.Zone == "" {
+			glog.Fatal("gce-zone must be specified for AWS")
+		}
+		awsConfig += fmt.Sprintf("Zone=%s\n", cloudConfig.Zone)
+
+		var err error
+		cloudConfig.Provider, err = cloudprovider.GetCloudProvider(testContext.Provider, strings.NewReader(awsConfig))
+		if err != nil {
+			glog.Fatal("Error building AWS provider: ", err)
+		}
+	}
+
+	os.Exit(m.Run())
+}