Q:

How can a lightweight checkout be changed to a heavyweight checkout in Bazaar?

This question discusses changing a heavyweight Bazaar checkout into a lightweight one. How can I do the reverse -- change a lightweight Bazaar checkout into a heavyweight one?

A:

Use the bzr reconfigure --checkout command, for example:
$ bzr info
Lightweight checkout (format: pack-0.92)
Location:
  light checkout root: .
        checkout root: /path/to/workdir
   checkout of branch: /path/to/repo

$ bzr reconfigure --checkout
$ bzr info
Checkout (format: unnamed)
Location:
       checkout root: .
  checkout of branch: /path/to/repo

