Dependencies for the affinity router and the
affinity routing daemon.
Change-Id: Icda72c3594ef7f8f0bc0c33dc03087a4c25529ca
diff --git a/vendor/k8s.io/apimachinery/pkg/version/helpers.go b/vendor/k8s.io/apimachinery/pkg/version/helpers.go
new file mode 100644
index 0000000..5e041d6
--- /dev/null
+++ b/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
+}