Duplicate a single helper from pkg/apis

Duplicating GetPodPriority code from k8s.io/kubernetes/pkg/api/v1/pod as PodPriority

staging/src/k8s.io/component-helpers/BUILD

@@ -7,7 +7,10 @@ filegroup(
 
 filegroup(
     name = "all-srcs",
-    srcs = [":package-srcs"],
+    srcs = [
+        ":package-srcs",
+        "//staging/src/k8s.io/component-helpers/scheduling/corev1:all-srcs",
+    ],
     tags = ["automanaged"],
     visibility = ["//visibility:public"],
 )

staging/src/k8s.io/component-helpers/scheduling/OWNERS

@@ -0,0 +1,8 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+approvers:
+- sig-scheduling-maintainers
+reviewers:
+- sig-scheduling
+labels:
+- sig/scheduling

staging/src/k8s.io/component-helpers/scheduling/corev1/BUILD

@@ -0,0 +1,34 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "doc.go",
+        "helpers.go",
+    ],
+    importmap = "k8s.io/kubernetes/vendor/k8s.io/component-helpers/scheduling/corev1",
+    importpath = "k8s.io/component-helpers/scheduling/corev1",
+    visibility = ["//visibility:public"],
+    deps = ["//staging/src/k8s.io/api/core/v1:go_default_library"],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["helpers_test.go"],
+    embed = [":go_default_library"],
+    deps = ["//staging/src/k8s.io/api/core/v1:go_default_library"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

staging/src/k8s.io/component-helpers/scheduling/corev1/doc.go

@@ -0,0 +1,23 @@
+/*
+Copyright 2020 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 corev1 defines functions which should satisfy one of the following:
+//
+// - Be used by more than one core component (kube-scheduler, kubelet, kube-apiserver, etc.)
+// - Be used by a core component and another kubernetes project (cluster-autoscaler, descheduler)
+//
+// And be a scheduling feature.
+package corev1 // import "k8s.io/component-helpers/scheduling/corev1"

staging/src/k8s.io/component-helpers/scheduling/corev1/helpers.go

@@ -0,0 +1,32 @@
+/*
+Copyright 2020 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 corev1
+
+import (
+	v1 "k8s.io/api/core/v1"
+)
+
+// PodPriority returns priority of the given pod.
+func PodPriority(pod *v1.Pod) int32 {
+	if pod.Spec.Priority != nil {
+		return *pod.Spec.Priority
+	}
+	// When priority of a running pod is nil, it means it was created at a time
+	// that there was no global default priority class and the priority class
+	// name of the pod was empty. So, we resolve to the static default priority.
+	return 0
+}

staging/src/k8s.io/component-helpers/scheduling/corev1/helpers_test.go

@@ -0,0 +1,59 @@
+/*
+Copyright 2020 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 corev1
+
+import (
+	"testing"
+
+	v1 "k8s.io/api/core/v1"
+)
+
+// TestPodPriority tests PodPriority function.
+func TestPodPriority(t *testing.T) {
+	p := int32(20)
+	tests := []struct {
+		name             string
+		pod              *v1.Pod
+		expectedPriority int32
+	}{
+		{
+			name: "no priority pod resolves to static default priority",
+			pod: &v1.Pod{
+				Spec: v1.PodSpec{Containers: []v1.Container{
+					{Name: "container", Image: "image"}},
+				},
+			},
+			expectedPriority: 0,
+		},
+		{
+			name: "pod with priority resolves correctly",
+			pod: &v1.Pod{
+				Spec: v1.PodSpec{Containers: []v1.Container{
+					{Name: "container", Image: "image"}},
+					Priority: &p,
+				},
+			},
+			expectedPriority: p,
+		},
+	}
+	for _, test := range tests {
+		if PodPriority(test.pod) != test.expectedPriority {
+			t.Errorf("expected pod priority: %v, got %v", test.expectedPriority, PodPriority(test.pod))
+		}
+
+	}
+}