lib/model, gui: Allow creating and editing ignores of paused folders (fixes #3608)

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3996
LGTM: calmh, AudriusButkevicius

cmd/syncthing/gui.go

@@ -969,7 +969,9 @@ func (s *apiService) getRandomString(w http.ResponseWriter, r *http.Request) {
 func (s *apiService) getDBIgnores(w http.ResponseWriter, r *http.Request) {
 	qs := r.URL.Query()
 
-	ignores, patterns, err := s.model.GetIgnores(qs.Get("folder"))
+	folder := qs.Get("folder")
+
+	ignores, patterns, err := s.model.GetIgnores(folder)
 	if err != nil {
 		http.Error(w, err.Error(), 500)
 		return

gui/default/assets/lang/lang-en.json

@@ -43,6 +43,7 @@
    "Copied from original": "Copied from original",
    "Copyright © 2014-2016 the following Contributors:": "Copyright © 2014-2016 the following Contributors:",
    "Copyright © 2014-2017 the following Contributors:": "Copyright © 2014-2017 the following Contributors:",
+   "Creating ignore patterns, overwriting an existing file at {%path%}.": "Creating ignore patterns, overwriting an existing file at {{path}}.",
    "Danger!": "Danger!",
    "Deleted": "Deleted",
    "Device": "Device",
@@ -63,6 +64,7 @@
    "Edit Device": "Edit Device",
    "Edit Folder": "Edit Folder",
    "Editing": "Editing",
+   "Editing {%path%}.": "Editing {{path}}.",
    "Enable NAT traversal": "Enable NAT traversal",
    "Enable Relaying": "Enable Relaying",
    "Enter comma separated  (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.": "Enter comma separated  (\"tcp://ip:port\", \"tcp://host:port\") addresses or \"dynamic\" to perform automatic discovery of the address.",

gui/default/syncthing/core/syncthingController.js

@@ -58,6 +58,24 @@ angular.module('syncthing.core')
             $scope.metricRates = (window.localStorage["metricRates"] == "true");
         } catch (exception) { }
 
+        $scope.folderDefaults = {
+                selectedDevices: {},
+                type: "readwrite",
+                rescanIntervalS: 60,
+                minDiskFreePct: 1,
+                maxConflicts: 10,
+                fsync: true,
+                order: "random",
+                fileVersioningSelector: "none",
+                trashcanClean: 0,
+                simpleKeep: 5,
+                staggeredMaxAge: 365,
+                staggeredCleanInterval: 3600,
+                staggeredVersionsPath: "",
+                externalCommand: "",
+                autoNormalize: true
+        };
+
         $scope.localStateTotal = {
             bytes: 0,
             files: 0
@@ -1393,24 +1411,9 @@ angular.module('syncthing.core')
         };
 
         $scope.addFolder = function () {
-            $scope.currentFolder = {
-                selectedDevices: {},
-                type: "readwrite",
-                rescanIntervalS: 60,
-                minDiskFreePct: 1,
-                maxConflicts: 10,
-                fsync: true,
-                order: "random",
-                fileVersioningSelector: "none",
-                trashcanClean: 0,
-                simpleKeep: 5,
-                staggeredMaxAge: 365,
-                staggeredCleanInterval: 3600,
-                staggeredVersionsPath: "",
-                externalCommand: "",
-                autoNormalize: true
-            };
+            $scope.currentFolder = angular.copy($scope.folderDefaults);
             $scope.editingExisting = false;
+            $('#editIgnores textarea').val("");
             $scope.folderEditor.$setPristine();
             $http.get(urlbase + '/svc/random/string?length=10').success(function (data) {
                 $scope.currentFolder.id = (data.random.substr(0, 5) + '-' + data.random.substr(5, 5)).toLowerCase();
@@ -1420,26 +1423,11 @@ angular.module('syncthing.core')
 
         $scope.addFolderAndShare = function (folder, folderLabel, device) {
             $scope.dismissFolderRejection(folder, device);
-            $scope.currentFolder = {
-                id: folder,
-                label: folderLabel,
-                selectedDevices: {},
-                rescanIntervalS: 60,
-                minDiskFreePct: 1,
-                maxConflicts: 10,
-                fsync: true,
-                order: "random",
-                fileVersioningSelector: "none",
-                trashcanClean: 0,
-                simpleKeep: 5,
-                staggeredMaxAge: 365,
-                staggeredCleanInterval: 3600,
-                staggeredVersionsPath: "",
-                externalCommand: "",
-                autoNormalize: true,
-                viewFlags: {
-                    importFromOtherDevice: true
-                }
+            $scope.currentFolder = angular.copy($scope.folderDefaults);
+            $scope.currentFolder.id = folder;
+            $scope.currentFolder.label = folderLabel;
+            $scope.currentFolder.viewFlags = {
+                importFromOtherDevice: true
             };
             $scope.currentFolder.selectedDevices[device] = true;
 
@@ -1516,10 +1504,20 @@ angular.module('syncthing.core')
                 delete folderCfg.versioning;
             }
 
+            var ignores = $('#editIgnores textarea').val().trim();
+            if (!$scope.editingExisting && ignores) {
+                folderCfg.paused = true;
+            };
+
             $scope.folders[folderCfg.id] = folderCfg;
             $scope.config.folders = folderList($scope.folders);
 
             $scope.saveConfig();
+
+            if (!$scope.editingExisting && ignores) {
+                $scope.saveIgnores();
+                $scope.setFolderPause(folderCfg.id, false);
+            };
         };
 
         $scope.dismissFolderRejection = function (folder, device) {
@@ -1593,11 +1591,21 @@ angular.module('syncthing.core')
                 });
         };
 
-        $scope.saveIgnores = function () {
-            if (!$scope.editingExisting) {
+        $scope.editIgnoresOnAddingFolder = function () {
+            if ($scope.editingExisting) {
                 return;
             }
 
+            if ($scope.currentFolder.path.endsWith($scope.system.pathSeparator)) {
+                $scope.currentFolder.path = $scope.currentFolder.path.slice(0, -1);
+            };
+            $('#editIgnores').modal().one('shown.bs.modal', function () {
+                textArea.focus();
+            });
+        };
+
+
+        $scope.saveIgnores = function () {
             $http.post(urlbase + '/db/ignores?folder=' + encodeURIComponent($scope.currentFolder.id), {
                 ignore: $('#editIgnores textarea').val().split('\n')
             });

gui/default/syncthing/folder/editFolderModalView.html

@@ -184,7 +184,7 @@
     <button type="button" class="btn btn-primary btn-sm" ng-click="saveFolder()" ng-disabled="folderEditor.$invalid">
       <span class="fa fa-check"></span>&nbsp;<span translate>Save</span>
     </button>
-    <button type="button" class="btn btn-default btn-sm" id="editIgnoresButton" ng-click="editIgnores()" ng-if="editingExisting">
+    <button type="button" class="btn btn-default btn-sm" id="editIgnoresButton" ng-click="editingExisting ? editIgnores() : editIgnoresOnAddingFolder()" ng-disabled="folderEditor.$invalid">
       <span class="fa fa-eye-slash"></span>&nbsp;<span translate>Ignore Patterns</span>
     </button>
     <button type="button" class="btn btn-default btn-sm" data-dismiss="modal">

gui/default/syncthing/folder/editIgnoresModalView.html

@@ -14,12 +14,13 @@
     </dl>
   </div>
   <div class="modal-footer">
-    <div class="pull-left"><span translate>Editing</span> <code>{{currentFolder.path}}{{system.pathSeparator}}.stignore</code></div>
-    <button type="button" class="btn btn-primary btn-sm" ng-click="saveIgnores()" data-dismiss="modal">
+    <div class="pull-left" ng-show="editingExisting"><span translate translate-value-path="{{currentFolder.path}}{{system.pathSeparator}}.stignore">Editing {%path%}.</span></div>
+    <div class="pull-left" ng-show="!editingExisting"><span translate translate-value-path="{{currentFolder.path}}{{system.pathSeparator}}.stignore">Creating ignore patterns, overwriting an existing file at {%path%}.</span></div>
+    <button type="button" class="btn btn-primary btn-sm" ng-click="editingExisting ? saveIgnores() : angular.noop()" data-dismiss="modal">
       <span class="fa fa-check"></span>&nbsp;<span translate>Save</span>
     </button>
     <button type="button" class="btn btn-default btn-sm" data-dismiss="modal">
       <span class="fa fa-times"></span>&nbsp;<span translate>Close</span>
     </button>
   </div>
-</modal>
+</modal>

lib/ignore/ignore.go

@@ -19,6 +19,7 @@ import (
 	"time"
 
 	"github.com/gobwas/glob"
+	"github.com/syncthing/syncthing/lib/osutil"
 	"github.com/syncthing/syncthing/lib/sync"
 )
 
@@ -64,6 +65,7 @@ func (r Result) IsCaseFolded() bool {
 }
 
 type Matcher struct {
+	lines     []string
 	patterns  []Pattern
 	withCache bool
 	matches   *cache
@@ -120,7 +122,7 @@ func (m *Matcher) Parse(r io.Reader, file string) error {
 }
 
 func (m *Matcher) parseLocked(r io.Reader, file string) error {
-	patterns, err := parseIgnoreFile(r, file, m.modtimes)
+	lines, patterns, err := parseIgnoreFile(r, file, m.modtimes)
 	// Error is saved and returned at the end. We process the patterns
 	// (possibly blank) anyway.
 
@@ -131,6 +133,7 @@ func (m *Matcher) parseLocked(r io.Reader, file string) error {
 	}
 
 	m.curHash = newHash
+	m.lines = lines
 	m.patterns = patterns
 	if m.withCache {
 		m.matches = newCache(patterns)
@@ -206,6 +209,13 @@ func (m *Matcher) Match(file string) (result Result) {
 	return resultNotMatched
 }
 
+// Lines return a list of the unprocessed lines in .stignore at last load
+func (m *Matcher) Lines() []string {
+	m.mut.Lock()
+	defer m.mut.Unlock()
+	return m.lines
+}
+
 // Patterns return a list of the loaded patterns, as they've been parsed
 func (m *Matcher) Patterns() []string {
 	if m == nil {
@@ -274,27 +284,28 @@ func hashPatterns(patterns []Pattern) string {
 	return fmt.Sprintf("%x", h.Sum(nil))
 }
 
-func loadIgnoreFile(file string, modtimes map[string]time.Time) ([]Pattern, error) {
+func loadIgnoreFile(file string, modtimes map[string]time.Time) ([]string, []Pattern, error) {
 	if _, ok := modtimes[file]; ok {
-		return nil, fmt.Errorf("Multiple include of ignore file %q", file)
+		return nil, nil, fmt.Errorf("multiple include of ignore file %q", file)
 	}
 
 	fd, err := os.Open(file)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	defer fd.Close()
 
 	info, err := fd.Stat()
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	modtimes[file] = info.ModTime()
 
 	return parseIgnoreFile(fd, file, modtimes)
 }
 
-func parseIgnoreFile(fd io.Reader, currentFile string, modtimes map[string]time.Time) ([]Pattern, error) {
+func parseIgnoreFile(fd io.Reader, currentFile string, modtimes map[string]time.Time) ([]string, []Pattern, error) {
+	var lines []string
 	var patterns []Pattern
 
 	defaultResult := resultInclude
@@ -360,11 +371,12 @@ func parseIgnoreFile(fd io.Reader, currentFile string, modtimes map[string]time.
 		} else if strings.HasPrefix(line, "#include ") {
 			includeRel := line[len("#include "):]
 			includeFile := filepath.Join(filepath.Dir(currentFile), includeRel)
-			includes, err := loadIgnoreFile(includeFile, modtimes)
+			includeLines, includePatterns, err := loadIgnoreFile(includeFile, modtimes)
 			if err != nil {
 				return fmt.Errorf("include of %q: %v", includeRel, err)
 			}
-			patterns = append(patterns, includes...)
+			lines = append(lines, includeLines...)
+			patterns = append(patterns, includePatterns...)
 		} else {
 			// Path name or pattern, add it so it matches files both in
 			// current directory and subdirs.
@@ -389,6 +401,7 @@ func parseIgnoreFile(fd io.Reader, currentFile string, modtimes map[string]time.
 	var err error
 	for scanner.Scan() {
 		line := strings.TrimSpace(scanner.Text())
+		lines = append(lines, line)
 		switch {
 		case line == "":
 			continue
@@ -411,11 +424,11 @@ func parseIgnoreFile(fd io.Reader, currentFile string, modtimes map[string]time.
 			}
 		}
 		if err != nil {
-			return nil, err
+			return nil, nil, err
 		}
 	}
 
-	return patterns, nil
+	return lines, patterns, nil
 }
 
 // IsInternal returns true if the file, as a path relative to the folder
@@ -434,3 +447,22 @@ func IsInternal(file string) bool {
 	}
 	return false
 }
+
+// WriteIgnores is a convenience function to avoid code duplication
+func WriteIgnores(path string, content []string) error {
+	fd, err := osutil.CreateAtomic(path)
+	if err != nil {
+		return err
+	}
+
+	for _, line := range content {
+		fmt.Fprintln(fd, line)
+	}
+
+	if err := fd.Close(); err != nil {
+		return err
+	}
+	osutil.HideFile(path)
+
+	return nil
+}

lib/model/folder.go

@@ -10,9 +10,11 @@ import "time"
 
 type folder struct {
 	stateTracker
-	scan  folderScanner
-	model *Model
-	stop  chan struct{}
+
+	scan                 folderScanner
+	model                *Model
+	stop                 chan struct{}
+	initialScanCompleted chan struct{}
 }
 
 func (f *folder) IndexUpdated() {
@@ -23,6 +25,7 @@ func (f *folder) DelayScan(next time.Duration) {
 }
 
 func (f *folder) Scan(subdirs []string) error {
+	<-f.initialScanCompleted
 	return f.scan.Scan(subdirs)
 }
 func (f *folder) Stop() {

lib/model/model.go

@@ -7,7 +7,6 @@
 package model
 
 import (
-	"bufio"
 	"crypto/tls"
 	"encoding/json"
 	"errors"
@@ -1252,66 +1251,51 @@ func (m *Model) ConnectedTo(deviceID protocol.DeviceID) bool {
 }
 
 func (m *Model) GetIgnores(folder string) ([]string, []string, error) {
-	var lines []string
-
 	m.fmut.RLock()
 	cfg, ok := m.folderCfgs[folder]
 	m.fmut.RUnlock()
-	if !ok {
-		return lines, nil, fmt.Errorf("Folder %s does not exist", folder)
-	}
+	if ok {
+		if !cfg.HasMarker() {
+			return nil, nil, fmt.Errorf("Folder %s stopped", folder)
+		}
 
-	if !cfg.HasMarker() {
-		return lines, nil, fmt.Errorf("Folder %s stopped", folder)
-	}
+		m.fmut.RLock()
+		ignores := m.folderIgnores[folder]
+		m.fmut.RUnlock()
 
-	fd, err := os.Open(filepath.Join(cfg.Path(), ".stignore"))
-	if err != nil {
-		if os.IsNotExist(err) {
-			return lines, nil, nil
-		}
-		l.Warnln("Loading .stignore:", err)
-		return lines, nil, err
+		return ignores.Lines(), ignores.Patterns(), nil
 	}
-	defer fd.Close()
 
-	scanner := bufio.NewScanner(fd)
-	for scanner.Scan() {
-		lines = append(lines, strings.TrimSpace(scanner.Text()))
+	if cfg, ok := m.cfg.Folders()[folder]; ok {
+		matcher := ignore.New(false)
+		path := filepath.Join(cfg.Path(), ".stignore")
+		if err := matcher.Load(path); err != nil {
+			return nil, nil, err
+		}
+		return matcher.Lines(), matcher.Patterns(), nil
 	}
 
-	m.fmut.RLock()
-	patterns := m.folderIgnores[folder].Patterns()
-	m.fmut.RUnlock()
-
-	return lines, patterns, nil
+	return nil, nil, fmt.Errorf("Folder %s does not exist", folder)
 }
 
 func (m *Model) SetIgnores(folder string, content []string) error {
-	cfg, ok := m.folderCfgs[folder]
+	cfg, ok := m.cfg.Folders()[folder]
 	if !ok {
 		return fmt.Errorf("Folder %s does not exist", folder)
 	}
 
-	path := filepath.Join(cfg.Path(), ".stignore")
-
-	fd, err := osutil.CreateAtomic(path)
-	if err != nil {
+	if err := ignore.WriteIgnores(filepath.Join(cfg.Path(), ".stignore"), content); err != nil {
 		l.Warnln("Saving .stignore:", err)
 		return err
 	}
 
-	for _, line := range content {
-		fmt.Fprintln(fd, line)
-	}
-
-	if err := fd.Close(); err != nil {
-		l.Warnln("Saving .stignore:", err)
-		return err
+	m.fmut.RLock()
+	runner, ok := m.folderRunners[folder]
+	m.fmut.RUnlock()
+	if ok {
+		return runner.Scan(nil)
 	}
-	osutil.HideFile(path)
-
-	return m.ScanFolder(folder)
+	return nil
 }
 
 // OnHello is called when an device connects to us.
@@ -2395,9 +2379,13 @@ func (m *Model) CommitConfiguration(from, to config.Configuration) bool {
 	for folderID, cfg := range toFolders {
 		if _, ok := fromFolders[folderID]; !ok {
 			// A folder was added.
-			l.Debugln(m, "adding folder", folderID)
-			m.AddFolder(cfg)
-			m.StartFolder(folderID)
+			if cfg.Paused {
+				l.Infoln(m, "Paused folder", cfg.Description())
+			} else {
+				l.Infoln(m, "Adding folder", cfg.Description())
+				m.AddFolder(cfg)
+				m.StartFolder(folderID)
+			}
 		}
 	}
 

lib/model/model_test.go

@@ -927,7 +927,7 @@ func TestIntroducer(t *testing.T) {
 	}
 }
 
-func TestIgnores(t *testing.T) {
+func changeIgnores(t *testing.T, m *Model, expected []string) {
 	arrEqual := func(a, b []string) bool {
 		if len(a) != len(b) {
 			return false
@@ -941,22 +941,6 @@ func TestIgnores(t *testing.T) {
 		return true
 	}
 
-	// Assure a clean start state
-	ioutil.WriteFile("testdata/.stfolder", nil, 0644)
-	ioutil.WriteFile("testdata/.stignore", []byte(".*\nquux\n"), 0644)
-
-	db := db.OpenMemory()
-	m := NewModel(defaultConfig, protocol.LocalDeviceID, "device", "syncthing", "dev", db, nil)
-	m.AddFolder(defaultFolderConfig)
-	m.StartFolder("default")
-	m.ServeBackground()
-	defer m.Stop()
-
-	expected := []string{
-		".*",
-		"quux",
-	}
-
 	ignores, _, err := m.GetIgnores("default")
 	if err != nil {
 		t.Error(err)
@@ -999,8 +983,34 @@ func TestIgnores(t *testing.T) {
 	if !arrEqual(ignores, expected) {
 		t.Errorf("Incorrect ignores: %v != %v", ignores, expected)
 	}
+}
 
-	_, _, err = m.GetIgnores("doesnotexist")
+func TestIgnores(t *testing.T) {
+	// Assure a clean start state
+	ioutil.WriteFile("testdata/.stfolder", nil, 0644)
+	ioutil.WriteFile("testdata/.stignore", []byte(".*\nquux\n"), 0644)
+
+	db := db.OpenMemory()
+	m := NewModel(defaultConfig, protocol.LocalDeviceID, "device", "syncthing", "dev", db, nil)
+	m.ServeBackground()
+	defer m.Stop()
+
+	// m.cfg.SetFolder is not usable as it is non-blocking, and there is no
+	// way to know when the folder is actually added.
+	m.AddFolder(defaultFolderConfig)
+	m.StartFolder("default")
+
+	// Make sure the initial scan has finished (ScanFolders is blocking)
+	m.ScanFolders()
+
+	expected := []string{
+		".*",
+		"quux",
+	}
+
+	changeIgnores(t, m, expected)
+
+	_, _, err := m.GetIgnores("doesnotexist")
 	if err == nil {
 		t.Error("No error")
 	}
@@ -1016,6 +1026,16 @@ func TestIgnores(t *testing.T) {
 	if err == nil {
 		t.Error("No error")
 	}
+
+	// Repeat tests with paused folder
+	pausedDefaultFolderConfig := defaultFolderConfig
+	pausedDefaultFolderConfig.Paused = true
+
+	m.RestartFolder(pausedDefaultFolderConfig)
+	// Here folder initialization is not an issue as a paused folder isn't
+	// added to the model and thus there is no initial scan happening.
+
+	changeIgnores(t, m, expected)
 }
 
 func TestROScanRecovery(t *testing.T) {
@@ -1763,13 +1783,8 @@ func TestIssue3028(t *testing.T) {
 	m.StartFolder("default")
 	m.ServeBackground()
 
-	// Ugly hack for testing: reach into the model for the SendReceiveFolder and wait
-	// for it to complete the initial scan. The risk is that it otherwise
-	// runs during our modifications and screws up the test.
-	m.fmut.RLock()
-	folder := m.folderRunners["default"].(*sendReceiveFolder)
-	m.fmut.RUnlock()
-	<-folder.initialScanCompleted
+	// Make sure the initial scan has finished (ScanFolders is blocking)
+	m.ScanFolders()
 
 	// Get a count of how many files are there now
 

lib/model/rofolder.go

@@ -26,10 +26,11 @@ type sendOnlyFolder struct {
 func newSendOnlyFolder(model *Model, cfg config.FolderConfiguration, _ versioner.Versioner, _ *fs.MtimeFS) service {
 	return &sendOnlyFolder{
 		folder: folder{
-			stateTracker: newStateTracker(cfg.ID),
-			scan:         newFolderScanner(cfg),
-			stop:         make(chan struct{}),
-			model:        model,
+			stateTracker:         newStateTracker(cfg.ID),
+			scan:                 newFolderScanner(cfg),
+			stop:                 make(chan struct{}),
+			model:                model,
+			initialScanCompleted: make(chan struct{}),
 		},
 		FolderConfiguration: cfg,
 	}
@@ -43,7 +44,6 @@ func (f *sendOnlyFolder) Serve() {
 		f.scan.timer.Stop()
 	}()
 
-	initialScanCompleted := false
 	for {
 		select {
 		case <-f.stop:
@@ -68,9 +68,11 @@ func (f *sendOnlyFolder) Serve() {
 				continue
 			}
 
-			if !initialScanCompleted {
+			select {
+			case <-f.initialScanCompleted:
+			default:
 				l.Infoln("Completed initial scan (ro) of", f.Description())
-				initialScanCompleted = true
+				close(f.initialScanCompleted)
 			}
 
 			if f.scan.HasNoInterval() {

lib/model/rwfolder.go

@@ -96,17 +96,16 @@ type sendReceiveFolder struct {
 
 	errors    map[string]string // path -> error string
 	errorsMut sync.Mutex
-
-	initialScanCompleted chan (struct{}) // exposed for testing
 }
 
 func newSendReceiveFolder(model *Model, cfg config.FolderConfiguration, ver versioner.Versioner, mtimeFS *fs.MtimeFS) service {
 	f := &sendReceiveFolder{
 		folder: folder{
-			stateTracker: newStateTracker(cfg.ID),
-			scan:         newFolderScanner(cfg),
-			stop:         make(chan struct{}),
-			model:        model,
+			stateTracker:         newStateTracker(cfg.ID),
+			scan:                 newFolderScanner(cfg),
+			stop:                 make(chan struct{}),
+			model:                model,
+			initialScanCompleted: make(chan struct{}),
 		},
 		FolderConfiguration: cfg,
 
@@ -119,8 +118,6 @@ func newSendReceiveFolder(model *Model, cfg config.FolderConfiguration, ver vers
 		remoteIndex: make(chan struct{}, 1), // This needs to be 1-buffered so that we queue a notification if we're busy doing a pull when it comes.
 
 		errorsMut: sync.NewMutex(),
-
-		initialScanCompleted: make(chan struct{}),
 	}
 
 	f.configureCopiersAndPullers()
@@ -1063,7 +1060,7 @@ func (f *sendReceiveFolder) handleFile(file protocol.FileInfo, copyChan chan<- c
 				// sweep is complete. As we do retries, we'll queue the scan
 				// for this file up to ten times, but the last nine of those
 				// scans will be cheap...
-				go f.scan.Scan([]string{file.Name})
+				go f.Scan([]string{file.Name})
 				return
 			}
 		}

lib/model/rwfolder_test.go

@@ -77,11 +77,12 @@ func setUpModel(file protocol.FileInfo) *Model {
 	return model
 }
 
-func setUpSendReceiveFolder(model *Model) sendReceiveFolder {
-	return sendReceiveFolder{
+func setUpSendReceiveFolder(model *Model) *sendReceiveFolder {
+	f := &sendReceiveFolder{
 		folder: folder{
-			stateTracker: newStateTracker("default"),
-			model:        model,
+			stateTracker:         newStateTracker("default"),
+			model:                model,
+			initialScanCompleted: make(chan struct{}),
 		},
 
 		mtimeFS:   fs.NewMtimeFS(fs.DefaultFilesystem, db.NewNamespacedKV(model.db, "mtime")),
@@ -90,6 +91,11 @@ func setUpSendReceiveFolder(model *Model) sendReceiveFolder {
 		errors:    make(map[string]string),
 		errorsMut: sync.NewMutex(),
 	}
+
+	// Folders are never actually started, so no initial scan will be done
+	close(f.initialScanCompleted)
+
+	return f
 }
 
 // Layout of the files: (indexes from the above array)