vfs: add flag --vfs-case-insensitive for windows/macOS mounts

rclone mount when run on Windows & macOS will now default to `--vfs-case-insensitive`.
This means that
This commit is contained in:
Ivan Andreev 2019-09-04 23:30:48 +03:00 committed by Nick Craig-Wood
parent 530ba66d35
commit 1c4e33d4ad
7 changed files with 217 additions and 1 deletions

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@ -287,11 +287,46 @@ This mode should support all normal file system operations.
If an upload or download fails it will be retried up to
--low-level-retries times.
```
rclone mount remote:path /path/to/mountpoint [flags]
```
### Case Sensitivity
Linux file systems are case-sensitive: two files can differ only
by case, and the exact case must be used when opening a file.
Windows is not like most other operating systems supported by rclone.
File systems in modern Windows are case-insensitive but case-preserving:
although existing files can be opened using any case, the exact case used
to create the file is preserved and available for programs to query.
It is not allowed for two files in the same directory to differ only by case.
Usually file systems on MacOS are case-insensitive. It is possible to make MacOS
file systems case-sensitive but that is not the default
The `--vfs-case-insensitive` mount flag controls how rclone handles these
two cases. If its value is `false`, rclone passes file names to the mounted
file system as is. If the flag is `true` (or appears without a value on
command line), rclone may perform a "fixup" as explained below.
The user may specify a file name to open/delete/rename/etc with a case
different than what is stored on mounted file system. If an argument refers
to an existing file with exactly the same name, then the case of the existing
file on the disk will be used. However, if a file name with exactly the same
name is not found but a name differing only by case exists, rclone will
transparently fixup the name. This fixup happens only when an existing file
is requested. Case sensitivity of file names created anew by rclone is
controlled by an underlying mounted file system.
Note that case sensitivity of the operating system running rclone (the target)
may differ from case sensitivity of a file system mounted by rclone (the source).
The flag controls whether "fixup" is performed to satisfy the target.
If the flag is not provided on command line, then its default value depends
on the operating system where rclone runs: `true` on Windows and MacOS, `false`
otherwise. If the flag is provided without a value, then it is `true`.
### Options
```
@ -322,6 +357,7 @@ rclone mount remote:path /path/to/mountpoint [flags]
--vfs-cache-max-size SizeSuffix Max total size of objects in the cache. (default off)
--vfs-cache-mode CacheMode Cache mode off|minimal|writes|full (default off)
--vfs-cache-poll-interval duration Interval to poll the cache for stale objects. (default 1m0s)
--vfs-case-insensitive [bool] Case insensitive mount true|false (default depends on operating system)
--vfs-read-chunk-size SizeSuffix Read the source objects in chunks. (default 128M)
--vfs-read-chunk-size-limit SizeSuffix If greater than --vfs-read-chunk-size, double the chunk size after each chunk read, until the limit is reached. 'off' is unlimited. (default off)
--volname string Set the volume name (not supported by all OSes).