Bazaar spontaneously unusable

[Ian Clatworthy]

Russel Winder wrote:
> I appreciate that using bzr.dev is bleeding edge but the recent change
> of bzrlib version has rendered a number of plugins unusable:
> 
> Unable to load plugin 'svn'. It requested API version (2, 1, 0) of module <module 'bzrlib' from '/home/Checkouts/Bazaar/Bazaar/Mainline_Working/bzrlib/__init__.pyc'> but the minimum exported version is (2, 2, 0), and the maximum is (2, 2, 0)
> Unable to load plugin 'git'. It requested API version (2, 1, 0) of module <module 'bzrlib' from '/home/Checkouts/Bazaar/Bazaar/Mainline_Working/bzrlib/__init__.pyc'> but the minimum exported version is (2, 2, 0), and the maximum is (2, 2, 0)
> Unable to load plugin 'rewrite'. It requested API version (2, 1, 0) of module <module 'bzrlib' from '/home/Checkouts/Bazaar/Bazaar/Mainline_Working/bzrlib/__init__.pyc'> but the minimum exported version is (2, 2, 0), and the maximum is (2, 2, 0)
> Unable to load plugin 'loggerhead'. It requested API version (2, 1, 0) of module <module 'bzrlib' from '/home/Checkouts/Bazaar/Bazaar/Mainline_Working/bzrlib/__init__.pyc'> but the minimum exported version is (2, 2, 0), and the maximum is (2, 2, 0)

Personally, I'm not a fan of our "default to failure" approach. I find
this truly annoying and think it's an anti-pattern.

Surely we can engineer a robust system without breaking half of our
popular plugins every six months like this? Our current process doesn't
scale. Imagine the scenario if we had 10 times as many plugins as now.
I'm certainly pleased that my Firefox plugins continue working 99% of
the time after each new Firefox release.

Ian C.