Optional interfaces are becoming more important in rclone,
--track-renames and --backup-dir both rely on them.
Up to this point rclone has used interface upgrades to define optional
behaviour on Fs objects. However when one Fs object wraps another it
is very difficult for this scheme to work accurately. rclone has
relied on specific error messages being returned when the interface
isn't supported - this is unsatisfactory because it means you have to
call the interface to see whether it is supported.
This change enables accurate detection of optional interfaces by use
of a Features struct as returned by an obligatory Fs.Features()
method. The Features struct contains flags and function pointers
which can be tested against nil to see whether they can be used.
As a result crypt and hubic can accurately reflect the capabilities of
the underlying Fs they are wrapping.
These are set in the form RCLONE_CONFIG_remote_option where remote is
the uppercased remote name and option is the uppercased config file
option name. Note that RCLONE_CONFIG_remote_TYPE must be set if
defining a new remote.
Fixes#616
With Keystone V3 both users and projects (a.k.a. tenants) can belong
to different domains. This change allow specifying different domains
for the user and the project.
If remote:path points to a file make NewFs return a sentinel error
fs.ErrorIsFile and an Fs which points to the parent.
Use this to remove the LimitedFs and just add this file to the
--files-from list.
This means that server side operations can be used also.
Fixes#518Fixes#545
Gives more accurate error propagation, control of depth of recursion
and short circuit recursion where possible.
Most of the the heavy lifting is done in the "fs" package, making file
system implementations a bit simpler.
This commit contains some code originally by Klaus Post.
Fixes#316
This was causing a problem with sync for chunked files. The directory
listing would read their size back as 0 and see that the size had
changed and immediately resync it.
* When creating a LimitedFs
* When calling List() to list files
* In the Storable() method
* Add a Purge() method to delete the directory marker objects too
This is a partial fix for #172
* Read metadata in file listing for 0 length files to fix syncs
* Ignore non-existent files in isManifestFile to fix errors on copy
* remove nsToSwiftFloatString - experiments with the swift program
indicate that it puts a variable number of points after the
decimal, so might as well use the one in the swift library.
* Make sure segments get deleted properly when move from segmented
to non segmented and vice versa
* Use internal list routine to detect errors on listing
* Remove the _segments container if possible
* Remove manifest first when deleting
...unless had some errors or stats interval requested.
Add fs.ErrorLog to differentiate between Logs which should be
suppressed and errors which shouldn't.
