reverse mode: support wildcard exclude (--exclude-wildcard)

This adds support for gitignore-like wildcards and exclude patters in
reverse mode. It (somewhat) fixes #273: no regexp support, but the
syntax should be powerful enough to satisfy most needs.

Also, since adding a lot of --exclude options can be tedious, it adds
the --exclude-from option to read patterns from a file (or files).

1 files changed, 4 insertions, 7 deletions

diff --git a/internal/fusefrontend_reverse/rfile.go b/internal/fusefrontend_reverse/rfile.go
index 75932cb..9c31681 100644
--- a/internal/fusefrontend_reverse/rfile.go
+++ b/internal/fusefrontend_reverse/rfile.go
@@ -34,19 +34,16 @@ type reverseFile struct {
 
 var inodeTable syncmap.Map
 
-// newFile decrypts and opens the path "relPath" and returns a reverseFile
+// newFile receives a ciphered path "relPath" and its corresponding
+// decrypted path "pRelPath", opens it and returns a reverseFile
 // object. The backing file descriptor is always read-only.
-func (rfs *ReverseFS) newFile(relPath string) (*reverseFile, fuse.Status) {
-	if rfs.isExcluded(relPath) {
+func (rfs *ReverseFS) newFile(relPath string, pRelPath string) (*reverseFile, fuse.Status) {
+	if rfs.isExcludedPlain(pRelPath) {
 		// Excluded paths should have been filtered out beforehand. Better safe
 		// than sorry.
 		tlog.Warn.Printf("BUG: newFile: received excluded path %q. This should not happen.", relPath)
 		return nil, fuse.ENOENT
 	}
-	pRelPath, err := rfs.decryptPath(relPath)
-	if err != nil {
-		return nil, fuse.ToStatus(err)
-	}
 	dir := filepath.Dir(pRelPath)
 	dirfd, err := syscallcompat.OpenDirNofollow(rfs.args.Cipherdir, dir)
 	if err != nil {