build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/k8s.io/apimachinery/pkg/version/doc.go

@@ -0,0 +1,20 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+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.
+*/
+
+// +k8s:openapi-gen=true
+
+// Package version supplies the type for version information collected at build time.
+package version // import "k8s.io/apimachinery/pkg/version"

e2e/vendor/k8s.io/apimachinery/pkg/version/helpers.go

@@ -0,0 +1,88 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+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 version
+
+import (
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+type versionType int
+
+const (
+	// Bigger the version type number, higher priority it is
+	versionTypeAlpha versionType = iota
+	versionTypeBeta
+	versionTypeGA
+)
+
+var kubeVersionRegex = regexp.MustCompile("^v([\\d]+)(?:(alpha|beta)([\\d]+))?$")
+
+func parseKubeVersion(v string) (majorVersion int, vType versionType, minorVersion int, ok bool) {
+	var err error
+	submatches := kubeVersionRegex.FindStringSubmatch(v)
+	if len(submatches) != 4 {
+		return 0, 0, 0, false
+	}
+	switch submatches[2] {
+	case "alpha":
+		vType = versionTypeAlpha
+	case "beta":
+		vType = versionTypeBeta
+	case "":
+		vType = versionTypeGA
+	default:
+		return 0, 0, 0, false
+	}
+	if majorVersion, err = strconv.Atoi(submatches[1]); err != nil {
+		return 0, 0, 0, false
+	}
+	if vType != versionTypeGA {
+		if minorVersion, err = strconv.Atoi(submatches[3]); err != nil {
+			return 0, 0, 0, false
+		}
+	}
+	return majorVersion, vType, minorVersion, true
+}
+
+// CompareKubeAwareVersionStrings compares two kube-like version strings.
+// Kube-like version strings are starting with a v, followed by a major version, optional "alpha" or "beta" strings
+// followed by a minor version (e.g. v1, v2beta1). Versions will be sorted based on GA/alpha/beta first and then major
+// and minor versions. e.g. v2, v1, v1beta2, v1beta1, v1alpha1.
+func CompareKubeAwareVersionStrings(v1, v2 string) int {
+	if v1 == v2 {
+		return 0
+	}
+	v1major, v1type, v1minor, ok1 := parseKubeVersion(v1)
+	v2major, v2type, v2minor, ok2 := parseKubeVersion(v2)
+	switch {
+	case !ok1 && !ok2:
+		return strings.Compare(v2, v1)
+	case !ok1 && ok2:
+		return -1
+	case ok1 && !ok2:
+		return 1
+	}
+	if v1type != v2type {
+		return int(v1type) - int(v2type)
+	}
+	if v1major != v2major {
+		return v1major - v2major
+	}
+	return v1minor - v2minor
+}

e2e/vendor/k8s.io/apimachinery/pkg/version/types.go

@@ -0,0 +1,37 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+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 version
+
+// Info contains versioning information.
+// TODO: Add []string of api versions supported? It's still unclear
+// how we'll want to distribute that information.
+type Info struct {
+	Major        string `json:"major"`
+	Minor        string `json:"minor"`
+	GitVersion   string `json:"gitVersion"`
+	GitCommit    string `json:"gitCommit"`
+	GitTreeState string `json:"gitTreeState"`
+	BuildDate    string `json:"buildDate"`
+	GoVersion    string `json:"goVersion"`
+	Compiler     string `json:"compiler"`
+	Platform     string `json:"platform"`
+}
+
+// String returns info as a human-friendly version string.
+func (info Info) String() string {
+	return info.GitVersion
+}