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operations: fix renaming a file on macOS

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Before this change, a file would sometimes be silently deleted instead of
renamed on macOS, due to its unique handling of unicode normalization. Rclone
already had a SameObject check in place for case insensitivity before deleting
the source (for example if "hello.txt" was renamed to "HELLO.txt"), but had no
such check for unicode normalization. After this change, the delete is skipped
on macOS if the src and dst filenames normalize to the same NFC string.

Example of the previous behavior:

 ~ % rclone touch /Users/nielash/rename_test/ö
 ~ % rclone lsl /Users/nielash/rename_test/ö
        0 2023-11-21 17:28:06.170486000 ö
 ~ % rclone moveto /Users/nielash/rename_test/ö /Users/nielash/rename_test/ö -vv
2023/11/21 17:28:51 DEBUG : rclone: Version "v1.64.0" starting with parameters ["rclone" "moveto" "/Users/nielash/rename_test/ö" "/Users/nielash/rename_test/ö" "-vv"]
2023/11/21 17:28:51 DEBUG : Creating backend with remote "/Users/nielash/rename_test/ö"
2023/11/21 17:28:51 DEBUG : Using config file from "/Users/nielash/.config/rclone/rclone.conf"
2023/11/21 17:28:51 DEBUG : fs cache: adding new entry for parent of "/Users/nielash/rename_test/ö", "/Users/nielash/rename_test"
2023/11/21 17:28:51 DEBUG : Creating backend with remote "/Users/nielash/rename_test/"
2023/11/21 17:28:51 DEBUG : fs cache: renaming cache item "/Users/nielash/rename_test/" to be canonical "/Users/nielash/rename_test"
2023/11/21 17:28:51 DEBUG : ö: Size and modification time the same (differ by 0s, within tolerance 1ns)
2023/11/21 17:28:51 DEBUG : ö: Unchanged skipping
2023/11/21 17:28:51 INFO  : ö: Deleted
2023/11/21 17:28:51 INFO  :
Transferred:   	          0 B / 0 B, -, 0 B/s, ETA -
Checks:                 1 / 1, 100%
Deleted:                1 (files), 0 (dirs)
Elapsed time:         0.0s

2023/11/21 17:28:51 DEBUG : 5 go routines active
 ~ % rclone lsl /Users/nielash/rename_test/
 ~ %
This commit is contained in:
nielash 2023-11-20 11:04:54 -05:00
parent 422b037087
commit 7c6f0cc455
1 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
fs/operations/operations.go
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@ -16,6 +16,7 @@ import (
"os"
"path"
"path/filepath"
"runtime"
"sort"
"strconv"
"strings"
@ -37,6 +38,7 @@ import (
"github.com/rclone/rclone/lib/random"
"github.com/rclone/rclone/lib/readers"
"golang.org/x/sync/errgroup"
"golang.org/x/text/unicode/norm"
)
// CheckHashes checks the two files to see if they have common
@ -328,6 +330,11 @@ func SameObject(src, dst fs.Object) bool {
}
srcPath := path.Join(srcFs.Root(), src.Remote())
dstPath := path.Join(dstFs.Root(), dst.Remote())
if srcFs.Features().IsLocal && dstFs.Features().IsLocal && runtime.GOOS == "darwin" {
if norm.NFC.String(srcPath) == norm.NFC.String(dstPath) {
return true
}
}
if dst.Fs().Features().CaseInsensitive {
srcPath = strings.ToLower(srcPath)
dstPath = strings.ToLower(dstPath)
@ -1565,7 +1572,7 @@ func NeedTransfer(ctx context.Context, dst, src fs.Object) bool {
}
} else {
// Check to see if changed or not
if Equal(ctx, src, dst) {
if Equal(ctx, src, dst) && !SameObject(src, dst) {
fs.Debugf(src, "Unchanged skipping")
return false
}
@ -1847,7 +1854,7 @@ func moveOrCopyFile(ctx context.Context, fdst fs.Fs, fsrc fs.Fs, dstFileName str
if ci.IgnoreExisting {
fs.Debugf(srcObj, "Not removing source file as destination file exists and --ignore-existing is set")
logger(ctx, Match, srcObj, dstObj, nil)
} else {
} else if !SameObject(srcObj, dstObj) {
err = DeleteFile(ctx, srcObj)
logger(ctx, Differ, srcObj, dstObj, nil)
}