original timestamp (ctime, mtime) cannot survive a copy_fs or mirror

[mo-han]

as long as there's actual "copy" operation from one fs to another, then those "touched" files will lost their original ctime or mtime, which would be updated to the time when that copy operation happened.
this is not expected feature. though calling it "critical bug" might be too harsh but still it's much better if it could be fixed.

[althonos]

One thing we could do would be a preserve_timestamp keyword argument to fs.copy method, and maybe to fs.base.FS.copy as well, that basically attempts to update the (ctime, mtime) after copying.

[mo-han]

One thing we could do would be a preserve_timestamp keyword argument ...

Maybe make that default? At least make it defaut for mirror.