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, 124 insertions, 0 deletions

diff --git a/internal/fusefrontend_reverse/rfs_test.go b/internal/fusefrontend_reverse/rfs_test.go
new file mode 100644
index 0000000..eccaab9
--- /dev/null
+++ b/internal/fusefrontend_reverse/rfs_test.go
@@ -0,0 +1,124 @@
+package fusefrontend_reverse
+
+import (
+	"testing"
+
+	"github.com/rfjakob/gocryptfs/internal/configfile"
+	"github.com/rfjakob/gocryptfs/internal/nametransform"
+)
+
+func TestShouldDetectDirIV(t *testing.T) {
+	var rfs ReverseFS
+	ftype := rfs.getFileType("some/path/" + nametransform.DirIVFilename)
+	if ftype != typeDiriv {
+		t.Errorf("Expecting %d, got %d\n", typeDiriv, ftype)
+	}
+}
+
+func TestShouldDetectNameFile(t *testing.T) {
+	var rfs ReverseFS
+	ftype := rfs.getFileType("dir1/dir2/gocryptfs.longname.URrM8kgxTKYMgCk4hKk7RO9Lcfr30XQof4L_5bD9Iro=" + nametransform.LongNameSuffix)
+	if ftype != typeName {
+		t.Errorf("Expecting %d, got %d\n", typeName, ftype)
+	}
+}
+
+func TestShouldDetectConfigFile(t *testing.T) {
+	var rfs ReverseFS
+	ftype := rfs.getFileType(configfile.ConfDefaultName)
+	if ftype != typeConfig {
+		t.Errorf("Expecting %d, got %d\n", typeConfig, ftype)
+	}
+}
+
+func TestShouldDetectRegularFile(t *testing.T) {
+	var rfs ReverseFS
+	ftype := rfs.getFileType("documents/text_file.txt")
+	if ftype != typeRegular {
+		t.Errorf("Expecting %d, got %d\n", typeRegular, ftype)
+	}
+}
+
+// Note: For path exclusion, see also the integration tests in
+// tests/reverse/exclude_test.go
+func TestShouldNotCallIgnoreParserForTranslatedConfig(t *testing.T) {
+	rfs, ignorerMock := createRFSWithMocks()
+
+	ftype, excluded, _, err := rfs.getFileInfo(configfile.ConfDefaultName)
+	if err != nil {
+		t.Errorf("Unexpected error %q\n", err)
+	}
+	if ftype != typeConfig {
+		t.Errorf("Wrong file type, expecting %d, got %d\n", typeConfig, ftype)
+	}
+	if excluded {
+		t.Error("Should not exclude translated config")
+	}
+	if ignorerMock.calledWith != "" {
+		t.Error("Should not call IgnoreParser for translated config")
+	}
+}
+
+func TestShouldCheckIfParentIsExcludedForDirIV(t *testing.T) {
+	rfs, ignorerMock := createRFSWithMocks()
+	path := "dir"
+	ignorerMock.toExclude = "mockdecrypt_dir"
+	dirIV := path + "/" + nametransform.DirIVFilename
+
+	ftype, excluded, _, err := rfs.getFileInfo(dirIV)
+	if err != nil {
+		t.Errorf("Unexpected error %q\n", err)
+	}
+	if ftype != typeDiriv {
+		t.Errorf("Wrong file type, expecting %d, got %d\n", typeDiriv, ftype)
+	}
+	if !excluded {
+		t.Error("Should have excluded DirIV based on parent")
+	}
+	if ignorerMock.calledWith != "mockdecrypt_dir" {
+		t.Errorf("Should have checked parent dir, checked %q", ignorerMock.calledWith)
+	}
+}
+
+func TestShouldCheckIfParentIsExcludedForLongName(t *testing.T) {
+	rfs, ignorerMock := createRFSWithMocks()
+	path := "parent"
+	ignorerMock.toExclude = "mockdecrypt_parent"
+	dirIV := path + "/" + "gocryptfs.longname.fake.name"
+
+	ftype, excluded, _, err := rfs.getFileInfo(dirIV)
+	if err != nil {
+		t.Errorf("Unexpected error %q\n", err)
+	}
+	if ftype != typeName {
+		t.Errorf("Wrong file type, expecting %d, got %d\n", typeName, ftype)
+	}
+	if !excluded {
+		t.Error("Should have excluded LongName based on parent")
+	}
+	if ignorerMock.calledWith != "mockdecrypt_parent" {
+		t.Errorf("Should have checked parent dir, checked %q", ignorerMock.calledWith)
+	}
+}
+
+func TestShouldDecryptPathAndReturnTrueForExcludedPath(t *testing.T) {
+	rfs, ignorerMock := createRFSWithMocks()
+	ignorerMock.toExclude = "mockdecrypt_file.txt"
+
+	ftype, excluded, pPath, err := rfs.getFileInfo("file.txt")
+	if err != nil {
+		t.Errorf("Unexpected error %q\n", err)
+	}
+	if ftype != typeRegular {
+		t.Errorf("Wrong file type, expecting %d, got %d\n", typeRegular, ftype)
+	}
+	if !excluded {
+		t.Error("Should have excluded")
+	}
+	if pPath != "mockdecrypt_file.txt" {
+		t.Errorf("Wrong pPath returned, got %q\n", pPath)
+	}
+	if ignorerMock.calledWith != "mockdecrypt_file.txt" {
+		t.Error("Didn't call IgnoreParser with decrypted path")
+	}
+}