2 Commits

Author	SHA1	Message	Date
nielash	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	2024-03-27 10:50:14 -04:00
nielash	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.	2024-01-20 17:17:01 -05:00