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4 Commits
| Author | SHA1 | Message | Date | |
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nielash
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2bebbfaded |
bisync: add to integration tests - fixes #7665
This change officially adds bisync to the nightly integration tests for all backends. This will be part of giving us the confidence to take bisync out of beta. A number of fixes have been added to account for features which can differ on different backends -- for example, hash types / modtime support, empty directories, unicode normalization, and unimportant differences in log output. We will likely find that more of these are needed once we start running these with the full set of remotes. Additionally, bisync's extremely sensitive tests revealed a few bugs in other backends that weren't previously covered by other tests. Fixes for those issues have been submitted on the following separate PRs (and bisync test failures will be expected until they are merged): - #7670 memory: fix deadlock in operations.Purge - #7688 memory: fix incorrect list entries when rooted at subdirectory - #7690 memory: fix dst mutating src after server-side copy - #7692 dropbox: fix chunked uploads when size <= chunkSize Relatedly, workarounds have been put in place for the following backend limitations that are unsolvable for the time being: - #3262 drive is sometimes aware of trashed files/folders when it shouldn't be - #6199 dropbox can't handle emojis and certain other characters - #4590 onedrive API has longstanding bug for conflictBehavior=replace in server-side copy/move |
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nielash
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810644e873 |
bisync: add --resync-mode for customizing --resync - fixes #5681
Before this change, the path1 version of a file always prevailed during --resync, and many users requested options to automatically select the winner based on characteristics such as newer, older, larger, and smaller. This change adds support for such options. Note that ideally this feature would have been implemented by allowing the existing `--resync` flag to optionally accept string values such as `--resync newer`. However, this would have been a breaking change, as the existing flag is a `bool` and it does not seem to be possible to have a `string` flag that accepts both `--resync newer` and `--resync` (with no argument.) (`NoOptDefVal` does not work for this, as it would force an `=` like `--resync=newer`.) So instead, the best compromise to avoid a breaking change was to add a new `--resync-mode CHOICE` flag that implies `--resync`, while maintaining the existing behavior of `--resync` (which implies `--resync-mode path1`. i.e. both flags are now valid, and either can be used without the other. --resync-mode CHOICE In the event that a file differs on both sides during a `--resync`, `--resync-mode` controls which version will overwrite the other. The supported options are similar to `--conflict-resolve`. For all of the following options, the version that is kept is referred to as the "winner", and the version that is overwritten (deleted) is referred to as the "loser". The options are named after the "winner": - `path1` - (the default) - the version from Path1 is unconditionally considered the winner (regardless of `modtime` and `size`, if any). This can be useful if one side is more trusted or up-to-date than the other, at the time of the `--resync`. - `path2` - same as `path1`, except the path2 version is considered the winner. - `newer` - the newer file (by `modtime`) is considered the winner, regardless of which side it came from. This may result in having a mix of some winners from Path1, and some winners from Path2. (The implementation is analagous to running `rclone copy --update` in both directions.) - `older` - same as `newer`, except the older file is considered the winner, and the newer file is considered the loser. - `larger` - the larger file (by `size`) is considered the winner (regardless of `modtime`, if any). This can be a useful option for remotes without `modtime` support, or with the kinds of files (such as logs) that tend to grow but not shrink, over time. - `smaller` - the smaller file (by `size`) is considered the winner (regardless of `modtime`, if any). For all of the above options, note the following: - If either of the underlying remotes lacks support for the chosen method, it will be ignored and will fall back to the default of `path1`. (For example, if `--resync-mode newer` is set, but one of the paths uses a remote that doesn't support `modtime`.) - If a winner can't be determined because the chosen method's attribute is missing or equal, it will be ignored, and bisync will instead try to determine whether the files differ by looking at the other `--compare` methods in effect. (For example, if `--resync-mode newer` is set, but the Path1 and Path2 modtimes are identical, bisync will compare the sizes.) If bisync concludes that they differ, preference is given to whichever is the "source" at that moment. (In practice, this gives a slight advantage to Path2, as the 2to1 copy comes before the 1to2 copy.) If the files _do not_ differ, nothing is copied (as both sides are already correct). - These options apply only to files that exist on both sides (with the same name and relative path). Files that exist *only* on one side and not the other are *always* copied to the other, during `--resync` (this is one of the main differences between resync and non-resync runs.). - `--conflict-resolve`, `--conflict-loser`, and `--conflict-suffix` do not apply during `--resync`, and unlike these flags, nothing is renamed during `--resync`. When a file differs on both sides during `--resync`, one version always overwrites the other (much like in `rclone copy`.) (Consider using `--backup-dir` to retain a backup of the losing version.) - Unlike for `--conflict-resolve`, `--resync-mode none` is not a valid option (or rather, it will be interpreted as "no resync", unless `--resync` has also been specified, in which case it will be ignored.) - Winners and losers are decided at the individual file-level only (there is not currently an option to pick an entire winning directory atomically, although the `path1` and `path2` options typically produce a similar result.) - To maintain backward-compatibility, the `--resync` flag implies `--resync-mode path1` unless a different `--resync-mode` is explicitly specified. Similarly, all `--resync-mode` options (except `none`) imply `--resync`, so it is not necessary to use both the `--resync` and `--resync-mode` flags simultaneously -- either one is sufficient without the other. |
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nielash
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68f0998699 |
bisync: add options to auto-resolve conflicts - fixes #7471
Before this change, when a file was new/changed on both paths (relative to the
prior sync), and the versions on each side were not identical, bisync would
keep both versions, renaming them with ..path1 and ..path2 suffixes,
respectively. Many users have requested more control over how bisync handles
such conflicts -- including an option to automatically select one version as
the "winner" and rename or delete the "loser". This change introduces support
for such options.
--conflict-resolve CHOICE
In bisync, a "conflict" is a file that is *new* or *changed* on *both sides*
(relative to the prior run) AND is *not currently identical* on both sides.
`--conflict-resolve` controls how bisync handles such a scenario. The currently
supported options are:
- `none` - (the default) - do not attempt to pick a winner, keep and rename
both files according to `--conflict-loser` and
`--conflict-suffix` settings. For example, with the default
settings, `file.txt` on Path1 is renamed `file.txt.conflict1` and `file.txt` on
Path2 is renamed `file.txt.conflict2`. Both are copied to the opposite path
during the run, so both sides end up with a copy of both files. (As `none` is
the default, it is not necessary to specify `--conflict-resolve none` -- you
can just omit the flag.)
- `newer` - the newer file (by `modtime`) is considered the winner and is
copied without renaming. The older file (the "loser") is handled according to
`--conflict-loser` and `--conflict-suffix` settings (either renamed or
deleted.) For example, if `file.txt` on Path1 is newer than `file.txt` on
Path2, the result on both sides (with other default settings) will be `file.txt`
(winner from Path1) and `file.txt.conflict1` (loser from Path2).
- `older` - same as `newer`, except the older file is considered the winner,
and the newer file is considered the loser.
- `larger` - the larger file (by `size`) is considered the winner (regardless
of `modtime`, if any).
- `smaller` - the smaller file (by `size`) is considered the winner (regardless
of `modtime`, if any).
- `path1` - the version from Path1 is unconditionally considered the winner
(regardless of `modtime` and `size`, if any). This can be useful if one side is
usually more trusted or up-to-date than the other.
- `path2` - same as `path1`, except the path2 version is considered the
winner.
For all of the above options, note the following:
- If either of the underlying remotes lacks support for the chosen method, it
will be ignored and fall back to `none`. (For example, if `--conflict-resolve
newer` is set, but one of the paths uses a remote that doesn't support
`modtime`.)
- If a winner can't be determined because the chosen method's attribute is
missing or equal, it will be ignored and fall back to `none`. (For example, if
`--conflict-resolve newer` is set, but the Path1 and Path2 modtimes are
identical, even if the sizes may differ.)
- If the file's content is currently identical on both sides, it is not
considered a "conflict", even if new or changed on both sides since the prior
sync. (For example, if you made a change on one side and then synced it to the
other side by other means.) Therefore, none of the conflict resolution flags
apply in this scenario.
- The conflict resolution flags do not apply during a `--resync`, as there is
no "prior run" to speak of (but see `--resync-mode` for similar
options.)
--conflict-loser CHOICE
`--conflict-loser` determines what happens to the "loser" of a sync conflict
(when `--conflict-resolve` determines a winner) or to both
files (when there is no winner.) The currently supported options are:
- `num` - (the default) - auto-number the conflicts by automatically appending
the next available number to the `--conflict-suffix`, in chronological order.
For example, with the default settings, the first conflict for `file.txt` will
be renamed `file.txt.conflict1`. If `file.txt.conflict1` already exists,
`file.txt.conflict2` will be used instead (etc., up to a maximum of
9223372036854775807 conflicts.)
- `pathname` - rename the conflicts according to which side they came from,
which was the default behavior prior to `v1.66`. For example, with
`--conflict-suffix path`, `file.txt` from Path1 will be renamed
`file.txt.path1`, and `file.txt` from Path2 will be renamed `file.txt.path2`.
If two non-identical suffixes are provided (ex. `--conflict-suffix
cloud,local`), the trailing digit is omitted. Importantly, note that with
`pathname`, there is no auto-numbering beyond `2`, so if `file.txt.path2`
somehow already exists, it will be overwritten. Using a dynamic date variable
in your `--conflict-suffix` (see below) is one possible way to avoid this. Note
also that conflicts-of-conflicts are possible, if the original conflict is not
manually resolved -- for example, if for some reason you edited
`file.txt.path1` on both sides, and those edits were different, the result
would be `file.txt.path1.path1` and `file.txt.path1.path2` (in addition to
`file.txt.path2`.)
- `delete` - keep the winner only and delete the loser, instead of renaming it.
If a winner cannot be determined (see `--conflict-resolve` for details on how
this could happen), `delete` is ignored and the default `num` is used instead
(i.e. both versions are kept and renamed, and neither is deleted.) `delete` is
inherently the most destructive option, so use it only with care.
For all of the above options, note that if a winner cannot be determined (see
`--conflict-resolve` for details on how this could happen), or if
`--conflict-resolve` is not in use, *both* files will be renamed.
--conflict-suffix STRING[,STRING]
`--conflict-suffix` controls the suffix that is appended when bisync renames a
`--conflict-loser` (default: `conflict`).
`--conflict-suffix` will accept either one string or two comma-separated
strings to assign different suffixes to Path1 vs. Path2. This may be helpful
later in identifying the source of the conflict. (For example,
`--conflict-suffix dropboxconflict,laptopconflict`)
With `--conflict-loser num`, a number is always appended to the suffix. With
`--conflict-loser pathname`, a number is appended only when one suffix is
specified (or when two identical suffixes are specified.) i.e. with
`--conflict-loser pathname`, all of the following would produce exactly the
same result:
```
--conflict-suffix path
--conflict-suffix path,path
--conflict-suffix path1,path2
```
Suffixes may be as short as 1 character. By default, the suffix is appended
after any other extensions (ex. `file.jpg.conflict1`), however, this can be
changed with the `--suffix-keep-extension` flag (i.e. to instead result in
`file.conflict1.jpg`).
`--conflict-suffix` supports several *dynamic date variables* when enclosed in
curly braces as globs. This can be helpful to track the date and/or time that
each conflict was handled by bisync. For example:
```
--conflict-suffix {DateOnly}-conflict
// result: myfile.txt.2006-01-02-conflict1
```
All of the formats described [here](https://pkg.go.dev/time#pkg-constants) and
[here](https://pkg.go.dev/time#example-Time.Format) are supported, but take
care to ensure that your chosen format does not use any characters that are
illegal on your remotes (for example, macOS does not allow colons in
filenames, and slashes are also best avoided as they are often interpreted as
directory separators.) To address this particular issue, an additional
`{MacFriendlyTime}` (or just `{mac}`) option is supported, which results in
`2006-01-02 0304PM`.
Note that `--conflict-suffix` is entirely separate from rclone's main `--sufix`
flag. This is intentional, as users may wish to use both flags simultaneously,
if also using `--backup-dir`.
Finally, note that the default in bisync prior to `v1.66` was to rename
conflicts with `..path1` and `..path2` (with two periods, and `path` instead of
`conflict`.) Bisync now defaults to a single dot instead of a double dot, but
additional dots can be added by including them in the specified suffix string.
For example, for behavior equivalent to the previous default, use:
```
[--conflict-resolve none] --conflict-loser pathname --conflict-suffix .path
```
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nielash
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e71b252b65 |
bisync: add overlapping paths check
Before this change, Bisync did not check to make sure that Path1 and Path2 do not overlap, nor did it check for overlaps with `--backup-dir`. While `sync` does check for these things, it can sometimes be fooled because of the way Bisync calls it with `--files-from` filters. Relying on sync could also leave a run in a half-finished state if it were to error in one direction but not the other (`--backup-dir` only checks for overlaps with the dest.) After this change, Bisync does its own check up front, so we can quickly return an error and exit before any changes are made. |