On Thu, May 21, 2009 at 10:03:09AM +0200, Tomeu Vizoso wrote:

1) Stop checking out random unstable versions of external projects.
They break very often, and we cannot fix them.  Let's instead upgrade
manually every once in a while after some testing.
We are supposed to be doing this already, [...]
Are we? The first line of the Jhbuild wiki page still reads:

Sugar-jhbuild will automatically download the latest of Sugar's dependencies as well as Sugar itself directly from their source repositories, rather than relying on source packages that may have become stale.

To me, changing this is a policy decision, so I'd like to have a broader discussion about it.

Advantages:
+ less frequent breakages (only on manual updates)
+ maybe less total number of breakages (because some of them might be already fixed in the meantime)

Disadvantages:
- we discover incompatible upstream changes only after a while when upstream is less likely to change it
- regular manual updates needed
- need to track security updates and apply them ASAP (already a nightmare for xulrunner)


An option might be to use different modulesets in parallel (latest deps + latest Sugar, stable deps + latest Sugar, stable deps + stable Sugar) and have BuildBot instances for all of them. That way developers can use a reliable system, but we still get notified of upstream breakages early.

We already use distro packages wherever possible, BTW (*). So this is just about packages where the distro version (if any) is unsuitable to Sugar, usually either because it's an "old" distro version or we're relying on very recent features.


(*) If you find out that for any package we currently build on our own the distro version in fact suffices, please file a bug against sugar-jhbuild. I have little to no information about which versions or features we actually need.

CU Sascha

--
http://sascha.silbe.org/
http://www.infra-silbe.de/

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