Track and persist restore volume info

Signed-off-by: Daniel Jiang <jiangd@vmware.com>

changelogs/unreleased/7630-reasonerjt

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+Track and persist restore volume info

internal/volume/utils.go

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+/*
+Copyright The Velero Contributors.
+
+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 volume
+
+import (
+	"regexp"
+)
+
+// it has to have the same value as "github.com/vmware-tanzu/velero/pkg/restore".ItemRestoreResultCreated
+const itemRestoreResultCreated = "created"
+
+// RestoredPVCFromRestoredResourceList returns a set of PVCs that were restored from the given restoredResourceList.
+func RestoredPVCFromRestoredResourceList(restoredResourceList map[string][]string) map[string]struct{} {
+	pvcKey := "v1/PersistentVolumeClaim"
+	pvcList := make(map[string]struct{})
+
+	for _, pvc := range restoredResourceList[pvcKey] {
+		// the format of pvc string in restoredResourceList is like: "namespace/pvcName(status)"
+		// extract the substring before "(created)" if the status in rightmost Parenthesis is "created"
+		r := regexp.MustCompile(`\(([^)]+)\)`)
+		matches := r.FindAllStringSubmatch(pvc, -1)
+		if len(matches) > 0 && matches[len(matches)-1][1] == itemRestoreResultCreated {
+			pvcList[pvc[:len(pvc)-len("(created)")]] = struct{}{}
+		}
+	}
+
+	return pvcList
+}

internal/volume/utils_test.go

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+/*
+Copyright The Velero Contributors.
+
+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 volume
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetRestoredPVCFromRestoredResourceList(t *testing.T) {
+	// test empty list
+	restoredResourceList := map[string][]string{}
+	actual := RestoredPVCFromRestoredResourceList(restoredResourceList)
+	assert.Empty(t, actual)
+
+	// test no match
+	restoredResourceList = map[string][]string{
+		"v1/PersistentVolumeClaim": {
+			"namespace1/pvc1(updated)",
+		},
+		"v1/PersistentVolume": {
+			"namespace1/pv(created)",
+		},
+	}
+	actual = RestoredPVCFromRestoredResourceList(restoredResourceList)
+	assert.Empty(t, actual)
+
+	// test matches
+	restoredResourceList = map[string][]string{
+		"v1/PersistentVolumeClaim": {
+			"namespace1/pvc1(created)",
+			"namespace2/pvc2(updated)",
+			"namespace3/pvc(3)(created)",
+		},
+	}
+	expected := map[string]struct{}{
+		"namespace1/pvc1":   {},
+		"namespace3/pvc(3)": {},
+	}
+	actual = RestoredPVCFromRestoredResourceList(restoredResourceList)
+	assert.Equal(t, expected, actual)
+}