Comment 1 for bug 129724

'bzr bundle' changed to creating merge directives with a new format bundle internally.

They are a lot smaller and more efficient, but older clients will not be able to read them.

As part of the fix for bug #129504, it would be reasonable to change:

'bzr bundle' to be a separate command from 'bzr send'. And we can make it deprecated/hidden.

It should still create Bundle format 8/9, while 'bzr send -o' can generate the new format bundles.

It would be reasonable that 'bzr bundle' to issue a note saying that you can use 'bzr send -o' instead, which will generate a smaller/clearer/etc format.

There are some other incompatibilities. (bzr send *always* requires a target branch, while bzr bundle -r -2..-1 would just generate the bundle to recreate -1 from -2. It is possible that 'bzr send -r -2..-1 .' would do the same)

The new bundle format is pretty clear that you need at least bzr 0.19, since it has that in the header.