don't handle meta files in details (#2606)

## Description

Remove the display and interaction with .meta
files from details entries.

## Does this PR need a docs update or release note?

- [x] ✅ Yes, it's included

## Type of change

- [x] 🐛 Bugfix

## Test Plan

- [x] ⚡ Unit test

CHANGELOG.md

@@ -10,6 +10,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Show owner information when doing backup list in json format
 
+### Fixed
+- Corso-generated .meta files and permissions no longer appear in the backup details.
+
 ### Known Issues
 - Folders and Calendars containing zero items or subfolders are not included in the backup.
 

src/cmd/factory/impl/common.go

@@ -15,8 +15,8 @@ import (
 	"github.com/alcionai/corso/src/internal/connector/graph"
 	"github.com/alcionai/corso/src/internal/connector/mockconnector"
 	"github.com/alcionai/corso/src/internal/data"
+	"github.com/alcionai/corso/src/internal/version"
 	"github.com/alcionai/corso/src/pkg/account"
-	"github.com/alcionai/corso/src/pkg/backup"
 	"github.com/alcionai/corso/src/pkg/backup/details"
 	"github.com/alcionai/corso/src/pkg/control"
 	"github.com/alcionai/corso/src/pkg/credentials"
@@ -94,7 +94,7 @@ func generateAndRestoreItems(
 
 	Infof(ctx, "Generating %d %s items in %s\n", howMany, cat, Destination)
 
-	return gc.RestoreDataCollections(ctx, backup.Version, acct, sel, dest, opts, dataColls, errs)
+	return gc.RestoreDataCollections(ctx, version.Backup, acct, sel, dest, opts, dataColls, errs)
 }
 
 // ------------------------------------------------------------------------------------------

src/internal/connector/graph_connector_helper_test.go

@@ -712,6 +712,7 @@ func compareOneDriveItem(
 	}
 
 	name := item.UUID()
+
 	if strings.HasSuffix(name, onedrive.MetaFileSuffix) ||
 		strings.HasSuffix(name, onedrive.DirMetaFileSuffix) {
 		var (
@@ -1050,10 +1051,12 @@ func collectionsForInfo(
 	allInfo []colInfo,
 	backupVersion int,
 ) (int, int, []data.RestoreCollection, map[string]map[string][]byte) {
-	collections := make([]data.RestoreCollection, 0, len(allInfo))
-	expectedData := make(map[string]map[string][]byte, len(allInfo))
-	totalItems := 0
-	kopiaEntries := 0
+	var (
+		collections  = make([]data.RestoreCollection, 0, len(allInfo))
+		expectedData = make(map[string]map[string][]byte, len(allInfo))
+		totalItems   = 0
+		kopiaEntries = 0
+	)
 
 	for _, info := range allInfo {
 		pth := mustToDataLayerPath(

src/internal/connector/graph_connector_onedrive_test.go

@@ -14,8 +14,8 @@ import (
 	"github.com/alcionai/corso/src/internal/connector/graph"
 	"github.com/alcionai/corso/src/internal/connector/onedrive"
 	"github.com/alcionai/corso/src/internal/tester"
+	"github.com/alcionai/corso/src/internal/version"
 	"github.com/alcionai/corso/src/pkg/account"
-	"github.com/alcionai/corso/src/pkg/backup"
 	"github.com/alcionai/corso/src/pkg/control"
 	"github.com/alcionai/corso/src/pkg/path"
 )
@@ -175,9 +175,7 @@ func (c *onedriveCollection) withFile(
 			name+onedrive.DataFileSuffix,
 			fileData))
 
-	case 1:
-		fallthrough
-	case 2:
+	case 1, 2, 3:
 		c.items = append(c.items, onedriveItemWithData(
 			c.t,
 			name+onedrive.DataFileSuffix,
@@ -209,9 +207,7 @@ func (c *onedriveCollection) withFolder(
 	case 0:
 		return c
 
-	case 1:
-		fallthrough
-	case 2:
+	case 1, 2, 3:
 		c.items = append(
 			c.items,
 			onedriveMetadata(
@@ -219,8 +215,7 @@ func (c *onedriveCollection) withFolder(
 				"",
 				name+onedrive.DirMetaFileSuffix,
 				user,
-				roles),
-		)
+				roles))
 
 	default:
 		assert.FailNowf(c.t, "bad backup version", "version %d", c.backupVersion)
@@ -237,7 +232,7 @@ func (c *onedriveCollection) withPermissions(
 ) *onedriveCollection {
 	// These versions didn't store permissions for the folder or didn't store them
 	// in the folder's collection.
-	if c.backupVersion < 3 {
+	if c.backupVersion < version.OneDriveXIncludesPermissions {
 		return c
 	}
 
@@ -281,7 +276,7 @@ type onedriveColInfo struct {
 type onedriveTest struct {
 	name string
 	// Version this test first be run for. Will run from
-	// [startVersion, backup.Version] inclusive.
+	// [startVersion, version.Backup] inclusive.
 	startVersion int
 	cols         []onedriveColInfo
 }
@@ -467,17 +462,17 @@ func (suite *GraphConnectorOneDriveIntegrationSuite) TestRestoreAndBackup_Multip
 	}
 
 	for _, test := range table {
-		expected := testDataForInfo(suite.T(), test.cols, backup.Version)
+		expected := testDataForInfo(suite.T(), test.cols, version.Backup)
 
-		for version := test.startVersion; version <= backup.Version; version++ {
-			suite.T().Run(fmt.Sprintf("%s_Version%d", test.name, version), func(t *testing.T) {
-				input := testDataForInfo(t, test.cols, version)
+		for vn := test.startVersion; vn <= version.Backup; vn++ {
+			suite.T().Run(fmt.Sprintf("%s_Version%d", test.name, vn), func(t *testing.T) {
+				input := testDataForInfo(t, test.cols, vn)
 
 				testData := restoreBackupInfoMultiVersion{
 					service:             path.OneDriveService,
 					resource:            Users,
-					backupVersion:       version,
-					countMeta:           version == 0,
+					backupVersion:       vn,
+					countMeta:           vn == 0,
 					collectionsPrevious: input,
 					collectionsLatest:   expected,
 				}
@@ -691,17 +686,17 @@ func (suite *GraphConnectorOneDriveIntegrationSuite) TestPermissionsRestoreAndBa
 	}
 
 	for _, test := range table {
-		expected := testDataForInfo(suite.T(), test.cols, backup.Version)
+		expected := testDataForInfo(suite.T(), test.cols, version.Backup)
 
-		for version := test.startVersion; version <= backup.Version; version++ {
-			suite.T().Run(fmt.Sprintf("%s_Version%d", test.name, version), func(t *testing.T) {
-				input := testDataForInfo(t, test.cols, version)
+		for vn := test.startVersion; vn <= version.Backup; vn++ {
+			suite.T().Run(fmt.Sprintf("%s_Version%d", test.name, vn), func(t *testing.T) {
+				input := testDataForInfo(t, test.cols, vn)
 
 				testData := restoreBackupInfoMultiVersion{
 					service:             path.OneDriveService,
 					resource:            Users,
-					backupVersion:       version,
-					countMeta:           version == 0,
+					backupVersion:       vn,
+					countMeta:           vn == 0,
 					collectionsPrevious: input,
 					collectionsLatest:   expected,
 				}
@@ -764,17 +759,17 @@ func (suite *GraphConnectorOneDriveIntegrationSuite) TestPermissionsBackupAndNoR
 	}
 
 	for _, test := range table {
-		expected := testDataForInfo(suite.T(), test.cols, backup.Version)
+		expected := testDataForInfo(suite.T(), test.cols, version.Backup)
 
-		for version := test.startVersion; version <= backup.Version; version++ {
-			suite.T().Run(fmt.Sprintf("Version%d", version), func(t *testing.T) {
-				input := testDataForInfo(t, test.cols, version)
+		for vn := test.startVersion; vn <= version.Backup; vn++ {
+			suite.T().Run(fmt.Sprintf("Version%d", vn), func(t *testing.T) {
+				input := testDataForInfo(t, test.cols, vn)
 
 				testData := restoreBackupInfoMultiVersion{
 					service:             path.OneDriveService,
 					resource:            Users,
-					backupVersion:       version,
-					countMeta:           version == 0,
+					backupVersion:       vn,
+					countMeta:           vn == 0,
 					collectionsPrevious: input,
 					collectionsLatest:   expected,
 				}
@@ -811,7 +806,7 @@ func (suite *GraphConnectorOneDriveIntegrationSuite) TestPermissionsRestoreAndNo
 	test := restoreBackupInfoMultiVersion{
 		service:       path.OneDriveService,
 		resource:      Users,
-		backupVersion: backup.Version,
+		backupVersion: version.Backup,
 		countMeta:     false,
 		collectionsPrevious: []colInfo{
 			newOneDriveCollection(
@@ -821,7 +816,7 @@ func (suite *GraphConnectorOneDriveIntegrationSuite) TestPermissionsRestoreAndNo
 					driveID,
 					"root:",
 				},
-				backup.Version,
+				version.Backup,
 			).
 				withFile(
 					fileName,
@@ -843,7 +838,7 @@ func (suite *GraphConnectorOneDriveIntegrationSuite) TestPermissionsRestoreAndNo
 					"root:",
 					folderBName,
 				},
-				backup.Version,
+				version.Backup,
 			).
 				withFile(
 					fileName,
@@ -865,7 +860,7 @@ func (suite *GraphConnectorOneDriveIntegrationSuite) TestPermissionsRestoreAndNo
 					driveID,
 					"root:",
 				},
-				backup.Version,
+				version.Backup,
 			).
 				withFile(
 					fileName,
@@ -887,7 +882,7 @@ func (suite *GraphConnectorOneDriveIntegrationSuite) TestPermissionsRestoreAndNo
 					"root:",
 					folderBName,
 				},
-				backup.Version,
+				version.Backup,
 			).
 				withFile(
 					fileName,

src/internal/connector/graph_connector_test.go

@@ -17,8 +17,8 @@ import (
 	"github.com/alcionai/corso/src/internal/connector/support"
 	"github.com/alcionai/corso/src/internal/data"
 	"github.com/alcionai/corso/src/internal/tester"
+	"github.com/alcionai/corso/src/internal/version"
 	"github.com/alcionai/corso/src/pkg/account"
-	"github.com/alcionai/corso/src/pkg/backup"
 	"github.com/alcionai/corso/src/pkg/control"
 	"github.com/alcionai/corso/src/pkg/fault"
 	"github.com/alcionai/corso/src/pkg/path"
@@ -237,7 +237,7 @@ func (suite *GraphConnectorIntegrationSuite) TestRestoreFailsBadService() {
 
 	deets, err := suite.connector.RestoreDataCollections(
 		ctx,
-		backup.Version,
+		version.Backup,
 		acct,
 		sel,
 		dest,
@@ -314,7 +314,7 @@ func (suite *GraphConnectorIntegrationSuite) TestEmptyCollections() {
 
 			deets, err := suite.connector.RestoreDataCollections(
 				ctx,
-				backup.Version,
+				version.Backup,
 				suite.acct,
 				test.sel,
 				dest,
@@ -527,13 +527,13 @@ func runRestoreBackupTest(
 		t,
 		config,
 		test.collections,
-		backup.Version)
+		version.Backup)
 
 	runRestore(
 		t,
 		ctx,
 		config,
-		backup.Version,
+		version.Backup,
 		collections,
 		totalItems)
 
@@ -590,7 +590,7 @@ func runRestoreBackupTestVersions(
 		t,
 		config,
 		test.collectionsLatest,
-		backup.Version)
+		version.Backup)
 
 	runBackupAndCompare(
 		t,
@@ -930,7 +930,7 @@ func (suite *GraphConnectorIntegrationSuite) TestMultiFolderBackupDifferentNames
 					suite.user,
 					dest,
 					[]colInfo{collection},
-					backup.Version,
+					version.Backup,
 				)
 				allItems += totalItems
 
@@ -948,7 +948,7 @@ func (suite *GraphConnectorIntegrationSuite) TestMultiFolderBackupDifferentNames
 				restoreGC := loadConnector(ctx, t, graph.HTTPClient(graph.NoTimeout()), test.resource)
 				deets, err := restoreGC.RestoreDataCollections(
 					ctx,
-					backup.Version,
+					version.Backup,
 					suite.acct,
 					restoreSel,
 					dest,

src/internal/connector/onedrive/collection.go

@@ -406,7 +406,7 @@ func (oc *Collection) populateItems(ctx context.Context) {
 
 				// TODO(meain): Remove this once we change to always
 				// backing up permissions. Until then we cannot rely
-				// on weather the previous data is what we need as the
+				// on whether the previous data is what we need as the
 				// user might have not backup up permissions in the
 				// previous run.
 				metaItemInfo := details.ItemInfo{}
@@ -415,6 +415,7 @@ func (oc *Collection) populateItems(ctx context.Context) {
 					ItemName:   itemInfo.OneDrive.ItemName,
 					DriveName:  itemInfo.OneDrive.DriveName,
 					ItemType:   itemInfo.OneDrive.ItemType,
+					IsMeta:     true,
 					Modified:   time.Now(), // set to current time to always refresh
 					Owner:      itemInfo.OneDrive.Owner,
 					ParentPath: itemInfo.OneDrive.ParentPath,

src/internal/connector/onedrive/restore.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"encoding/json"
 	"io"
-	"math"
 	"runtime/trace"
 	"sort"
 	"strings"
@@ -20,6 +19,7 @@ import (
 	"github.com/alcionai/corso/src/internal/data"
 	D "github.com/alcionai/corso/src/internal/diagnostics"
 	"github.com/alcionai/corso/src/internal/observe"
+	"github.com/alcionai/corso/src/internal/version"
 	"github.com/alcionai/corso/src/pkg/backup/details"
 	"github.com/alcionai/corso/src/pkg/control"
 	"github.com/alcionai/corso/src/pkg/fault"
@@ -27,23 +27,10 @@ import (
 	"github.com/alcionai/corso/src/pkg/path"
 )
 
-const (
 // copyBufferSize is used for chunked upload
 // Microsoft recommends 5-10MB buffers
 // https://docs.microsoft.com/en-us/graph/api/driveitem-createuploadsession?view=graph-rest-1.0#best-practices
-	copyBufferSize = 5 * 1024 * 1024
-
-	// versionWithDataAndMetaFiles is the corso backup format version
-	// in which we split from storing just the data to storing both
-	// the data and metadata in two files.
-	versionWithDataAndMetaFiles = 1
-	// versionWithNameInMeta points to the backup format version where we begin
-	// storing files in kopia with their item ID instead of their OneDrive file
-	// name.
-	// TODO(ashmrtn): Update this to a real value when we merge the file name
-	// change. Set to MAXINT for now to keep the if-check using it working.
-	versionWithNameInMeta = math.MaxInt
-)
+const copyBufferSize = 5 * 1024 * 1024
 
 func getParentPermissions(
 	parentPath path.Path,
@@ -288,7 +275,7 @@ func RestoreCollection(
 				continue
 			}
 
-			if source == OneDriveSource && backupVersion >= versionWithDataAndMetaFiles {
+			if source == OneDriveSource && backupVersion >= version.OneDrive1DataAndMetaFiles {
 				name := itemData.UUID()
 
 				if strings.HasSuffix(name, DataFileSuffix) {
@@ -300,7 +287,7 @@ func RestoreCollection(
 						err      error
 					)
 
-					if backupVersion < versionWithNameInMeta {
+					if backupVersion < version.OneDriveXNameInMeta {
 						itemInfo, err = restoreV1File(
 							ctx,
 							source,

src/internal/operations/backup_integration_test.go

@@ -27,6 +27,7 @@ import (
 	"github.com/alcionai/corso/src/internal/kopia"
 	"github.com/alcionai/corso/src/internal/model"
 	"github.com/alcionai/corso/src/internal/tester"
+	"github.com/alcionai/corso/src/internal/version"
 	"github.com/alcionai/corso/src/pkg/account"
 	"github.com/alcionai/corso/src/pkg/backup"
 	"github.com/alcionai/corso/src/pkg/backup/details"
@@ -341,7 +342,7 @@ func generateContainerOfItems(
 
 	deets, err := gc.RestoreDataCollections(
 		ctx,
-		backup.Version,
+		version.Backup,
 		acct,
 		sel,
 		dest,

src/internal/version/backup.go

@@ -0,0 +1,37 @@
+package version
+
+import "math"
+
+const Backup = 3
+
+// Various labels to refer to important version changes.
+// Labels don't need 1:1 service:version representation.  Add a new
+// label when it's important to mark a delta in behavior that's handled
+// somewhere in the logic.
+// Labels should state their application, the backup version number,
+// and the colloquial purpose of the label.
+const (
+	// OneDrive1DataAndMetaFiles is the corso backup format version
+	// in which we split from storing just the data to storing both
+	// the data and metadata in two files.
+	OneDrive1DataAndMetaFiles = 1
+
+	// OneDrive3IsMetaMarker is a small improvement on
+	// VersionWithDataAndMetaFiles, but has a marker IsMeta which
+	// specifies if the file is a meta file or a data file.
+	OneDrive3IsMetaMarker = 3
+
+	// OneDrive4IncludesPermissions includes permissions in the backup.
+	// Note that this is larger than the current backup version.  That's
+	// because it isn't implemented yet.  But we have tests based on this,
+	// so maybe we just keep bumping the verson ahead of the backup until
+	// it gets implemented.
+	OneDriveXIncludesPermissions = Backup + 1
+
+	// OneDriveXNameInMeta points to the backup format version where we begin
+	// storing files in kopia with their item ID instead of their OneDrive file
+	// name.
+	// TODO(ashmrtn): Update this to a real value when we merge the file name
+	// change. Set to MAXINT for now to keep the if-check using it working.
+	OneDriveXNameInMeta = math.MaxInt
+)

src/pkg/backup/backup.go

@@ -10,12 +10,11 @@ import (
 	"github.com/alcionai/corso/src/internal/connector/support"
 	"github.com/alcionai/corso/src/internal/model"
 	"github.com/alcionai/corso/src/internal/stats"
+	"github.com/alcionai/corso/src/internal/version"
 	"github.com/alcionai/corso/src/pkg/fault"
 	"github.com/alcionai/corso/src/pkg/selectors"
 )
 
-const Version = 2
-
 // Backup represents the result of a backup operation
 type Backup struct {
 	model.BaseModel
@@ -72,7 +71,7 @@ func New(
 		Errors:          errs.Data(),
 		ReadWrites:      rw,
 		StartAndEndTime: se,
-		Version:         Version,
+		Version:         version.Backup,
 	}
 }
 

src/pkg/backup/details/details.go

@@ -35,10 +35,12 @@ type DetailsModel struct {
 // Print writes the DetailModel Entries to StdOut, in the format
 // requested by the caller.
 func (dm DetailsModel) PrintEntries(ctx context.Context) {
+	sl := dm.FilterMetaFiles()
+
 	if print.JSONFormat() {
-		printJSON(ctx, dm)
+		printJSON(ctx, sl)
 	} else {
-		printTable(ctx, dm)
+		printTable(ctx, sl)
 	}
 }
 
@@ -71,13 +73,13 @@ func printJSON(ctx context.Context, dm DetailsModel) {
 	print.All(ctx, ents...)
 }
 
-// Paths returns the list of Paths for non-folder items extracted from the
-// Entries slice.
+// Paths returns the list of Paths for non-folder and non-meta items extracted
+// from the Entries slice.
 func (dm DetailsModel) Paths() []string {
 	r := make([]string, 0, len(dm.Entries))
 
 	for _, ent := range dm.Entries {
-		if ent.Folder != nil {
+		if ent.Folder != nil || ent.isMetaFile() {
 			continue
 		}
 
@@ -89,21 +91,49 @@ func (dm DetailsModel) Paths() []string {
 
 // Items returns a slice of *ItemInfo that does not contain any FolderInfo
 // entries. Required because not all folders in the details are valid resource
-// paths.
+// paths, and we want to slice out metadata.
 func (dm DetailsModel) Items() []*DetailsEntry {
 	res := make([]*DetailsEntry, 0, len(dm.Entries))
 
 	for i := 0; i < len(dm.Entries); i++ {
-		if dm.Entries[i].Folder != nil {
+		ent := dm.Entries[i]
+		if ent.Folder != nil || ent.isMetaFile() {
 			continue
 		}
 
-		res = append(res, &dm.Entries[i])
+		res = append(res, &ent)
 	}
 
 	return res
 }
 
+// FilterMetaFiles returns a copy of the Details with all of the
+// .meta files removed from the entries.
+func (dm DetailsModel) FilterMetaFiles() DetailsModel {
+	d2 := DetailsModel{
+		Entries: []DetailsEntry{},
+	}
+
+	for _, ent := range dm.Entries {
+		if !ent.isMetaFile() {
+			d2.Entries = append(d2.Entries, ent)
+		}
+	}
+
+	return d2
+}
+
+// Check if a file is a metadata file. These are used to store
+// additional data like permissions in case of OneDrive and are not to
+// be treated as regular files.
+func (de DetailsEntry) isMetaFile() bool {
+	return de.ItemInfo.OneDrive != nil && de.ItemInfo.OneDrive.IsMeta
+}
+
+// ---------------------------------------------------------------------------
+// Builder
+// ---------------------------------------------------------------------------
+
 // Builder should be used to create a details model.
 type Builder struct {
 	d            Details
@@ -583,6 +613,7 @@ type OneDriveInfo struct {
 	ItemName   string    `json:"itemName,omitempty"`
 	DriveName  string    `json:"driveName,omitempty"`
 	ItemType   ItemType  `json:"itemType,omitempty"`
+	IsMeta     bool      `json:"isMeta,omitempty"`
 	Modified   time.Time `json:"modified,omitempty"`
 	Owner      string    `json:"owner,omitempty"`
 	ParentPath string    `json:"parentPath"`

src/pkg/backup/details/details_test.go

@@ -224,6 +224,69 @@ var pathItemsTable = []struct {
 		expectRepoRefs:     []string{"abcde", "12345"},
 		expectLocationRefs: []string{"locationref", "locationref2"},
 	},
+	{
+		name: "multiple entries with meta file",
+		ents: []DetailsEntry{
+			{
+				RepoRef:     "abcde",
+				LocationRef: "locationref",
+			},
+			{
+				RepoRef:     "foo.meta",
+				LocationRef: "locationref.dirmeta",
+				ItemInfo: ItemInfo{
+					OneDrive: &OneDriveInfo{IsMeta: false},
+				},
+			},
+			{
+				RepoRef:     "is-meta-file",
+				LocationRef: "locationref-meta-file",
+				ItemInfo: ItemInfo{
+					OneDrive: &OneDriveInfo{IsMeta: true},
+				},
+			},
+		},
+		expectRepoRefs:     []string{"abcde", "foo.meta"},
+		expectLocationRefs: []string{"locationref", "locationref.dirmeta"},
+	},
+	{
+		name: "multiple entries with folder and meta file",
+		ents: []DetailsEntry{
+			{
+				RepoRef:     "abcde",
+				LocationRef: "locationref",
+			},
+			{
+				RepoRef:     "12345",
+				LocationRef: "locationref2",
+			},
+			{
+				RepoRef:     "foo.meta",
+				LocationRef: "locationref.dirmeta",
+				ItemInfo: ItemInfo{
+					OneDrive: &OneDriveInfo{IsMeta: false},
+				},
+			},
+			{
+				RepoRef:     "is-meta-file",
+				LocationRef: "locationref-meta-file",
+				ItemInfo: ItemInfo{
+					OneDrive: &OneDriveInfo{IsMeta: true},
+				},
+			},
+			{
+				RepoRef:     "deadbeef",
+				LocationRef: "locationref3",
+				ItemInfo: ItemInfo{
+					Folder: &FolderInfo{
+						DisplayName: "test folder",
+					},
+				},
+			},
+		},
+		expectRepoRefs:     []string{"abcde", "12345", "foo.meta"},
+		expectLocationRefs: []string{"locationref", "locationref2", "locationref.dirmeta"},
+	},
 }
 
 func (suite *DetailsUnitSuite) TestDetailsModel_Path() {
@@ -259,6 +322,38 @@ func (suite *DetailsUnitSuite) TestDetailsModel_Items() {
 	}
 }
 
+func (suite *DetailsUnitSuite) TestDetailsModel_FilterMetaFiles() {
+	t := suite.T()
+
+	d := &DetailsModel{
+		Entries: []DetailsEntry{
+			{
+				RepoRef: "a.data",
+				ItemInfo: ItemInfo{
+					OneDrive: &OneDriveInfo{IsMeta: false},
+				},
+			},
+			{
+				RepoRef: "b.meta",
+				ItemInfo: ItemInfo{
+					OneDrive: &OneDriveInfo{IsMeta: false},
+				},
+			},
+			{
+				RepoRef: "c.meta",
+				ItemInfo: ItemInfo{
+					OneDrive: &OneDriveInfo{IsMeta: true},
+				},
+			},
+		},
+	}
+
+	d2 := d.FilterMetaFiles()
+
+	assert.Len(t, d2.Entries, 2)
+	assert.Len(t, d.Entries, 3)
+}
+
 func (suite *DetailsUnitSuite) TestDetails_AddFolders() {
 	itemTime := time.Date(2022, 10, 21, 10, 0, 0, 0, time.UTC)
 	folderTimeOlderThanItem := time.Date(2022, 9, 21, 10, 0, 0, 0, time.UTC)

src/pkg/repository/repository.go

@@ -2,6 +2,7 @@ package repository
 
 import (
 	"context"
+	"strings"
 	"time"
 
 	"github.com/alcionai/clues"
@@ -9,12 +10,14 @@ import (
 	"github.com/pkg/errors"
 
 	"github.com/alcionai/corso/src/internal/common/crash"
+	"github.com/alcionai/corso/src/internal/connector/onedrive"
 	"github.com/alcionai/corso/src/internal/events"
 	"github.com/alcionai/corso/src/internal/kopia"
 	"github.com/alcionai/corso/src/internal/model"
 	"github.com/alcionai/corso/src/internal/observe"
 	"github.com/alcionai/corso/src/internal/operations"
 	"github.com/alcionai/corso/src/internal/streamstore"
+	"github.com/alcionai/corso/src/internal/version"
 	"github.com/alcionai/corso/src/pkg/account"
 	"github.com/alcionai/corso/src/pkg/backup"
 	"github.com/alcionai/corso/src/pkg/backup/details"
@@ -358,6 +361,20 @@ func (r repository) BackupDetails(
 		return nil, nil, errs.Fail(err)
 	}
 
+	// Retroactively fill in isMeta information for items in older
+	// backup versions without that info
+	// version.Restore2 introduces the IsMeta flag, so only v1 needs a check.
+	if b.Version >= version.OneDrive1DataAndMetaFiles && b.Version < version.OneDrive3IsMetaMarker {
+		for _, d := range deets.Entries {
+			if d.OneDrive != nil {
+				if strings.HasSuffix(d.RepoRef, onedrive.MetaFileSuffix) ||
+					strings.HasSuffix(d.RepoRef, onedrive.DirMetaFileSuffix) {
+					d.OneDrive.IsMeta = true
+				}
+			}
+		}
+	}
+
 	return deets, b, errs
 }