qbranch should determine valid destination

[Alexander Belchenko]

If user don't provide valid destination in qbranch dialog then operation fails with message:

Target directory "" already exists.

We should be more smart and auto-fill the destination based on the source URL (as plain bzr branch does).

[Mark Hammond (mhammond)]

Note that 'qgetnew' is smart about filling the destination, but I didn't apply the same thing to qbranch as I didn't get any reply to my mail asking if it was desirable. I think it is, so refactoring the qgetnew code into something reusable might make sense.

[Alexander Belchenko (bialix)]

Mark Hammond пишет:
> Note that 'qgetnew' is smart about filling the destination, but I didn't
> apply the same thing to qbranch as I didn't get any reply to my mail
> asking if it was desirable. I think it is, so refactoring the qgetnew
> code into something reusable might make sense.
>
Sorry, it seems like I've missed your mail.

[Ian Clatworthy (ian-clatworthy)]

When the user enters a source location, the destination location should change to reflect it, provided the source isn't relative. For example:

1. source=lp:qbzr should suggest qbzr
2. source=trunk should suggest nothing.

As a nice bit of dwim, source=lp:bzr-xxx should suggest xxx.

I'd really like to see this done soon. See https://lists.launchpad.net/bzr-doc/msg00005.html.

[Ian Clatworthy (ian-clatworthy)]

Branch ready for review