all: Add receive only folder type (#5027)

Adds a receive only folder type that does not send changes, and where the user can optionally revert local changes. Also changes some of the icons to make the three folder types distinguishable.

lib/scanner/walk.go

@@ -68,6 +68,8 @@ type Config struct {
 	ProgressTickIntervalS int
 	// Whether to use large blocks for large files or the old standard of 128KiB for everything.
 	UseLargeBlocks bool
+	// Local flags to set on scanned files
+	LocalFlags uint32
 }
 
 type CurrentFiler interface {
@@ -367,10 +369,11 @@ func (w *walker) walkRegular(ctx context.Context, relPath string, info fs.FileIn
 		ModifiedBy:    w.ShortID,
 		Size:          info.Size(),
 		RawBlockSize:  int32(blockSize),
+		LocalFlags:    w.LocalFlags,
 	}
 
 	if hasCurFile {
-		if curFile.IsEquivalent(f, w.IgnorePerms, true) {
+		if curFile.IsEquivalentOptional(f, w.IgnorePerms, true, w.LocalFlags) {
 			return nil
 		}
 		if curFile.ShouldConflict() {
@@ -407,10 +410,11 @@ func (w *walker) walkDir(ctx context.Context, relPath string, info fs.FileInfo,
 		ModifiedS:     info.ModTime().Unix(),
 		ModifiedNs:    int32(info.ModTime().Nanosecond()),
 		ModifiedBy:    w.ShortID,
+		LocalFlags:    w.LocalFlags,
 	}
 
 	if ok {
-		if cf.IsEquivalent(f, w.IgnorePerms, true) {
+		if cf.IsEquivalentOptional(f, w.IgnorePerms, true, w.LocalFlags) {
 			return nil
 		}
 		if cf.ShouldConflict() {
@@ -463,10 +467,11 @@ func (w *walker) walkSymlink(ctx context.Context, relPath string, dchan chan pro
 		NoPermissions: true, // Symlinks don't have permissions of their own
 		SymlinkTarget: target,
 		ModifiedBy:    w.ShortID,
+		LocalFlags:    w.LocalFlags,
 	}
 
 	if ok {
-		if cf.IsEquivalent(f, w.IgnorePerms, true) {
+		if cf.IsEquivalentOptional(f, w.IgnorePerms, true, w.LocalFlags) {
 			return nil
 		}
 		if cf.ShouldConflict() {