- There are now 7,000+ packages in the Ubuntu main distro and over 19,000 in universe.
- There’s a tremendous rate of change.
- This isn’t a solution - it’s a description of an interesting problem space.
- Many projects feed into Debian, who Ubuntu feed from, and then Ubuntu release multiple images to the world at large.
- Stabilising this is hard, especially since Debian is a time-based release.
- Understanding whether there should be exceptions to the freezes is really challenging, especially when they’re to packages with many dependencies upon them.
- There’s a planning phase, a feature development phase, and a stabilization & QA phase.
- There’s a continual set of imports from Debian, mostly from Unstable. LTS comes from Debian Testing.
- Ubuntu archive contains ALL THE THINGS.
- 6 architectures, with 73 daily images (core Ubuntu + Flavour images).
Number of packages varies by the edition of Ubuntu, as well as the flavours.
Lots of facts: how do you convert facts into knowledge?
Image build summary files, the Package control files provide some core information.
Germinate examines “seeds”, groups of packages, and examines the dependencies between them; e.g. “desktop” is a seed, “live” is a seed, and so on and so forth.
Shows forward and reverse depenedencies.
There are other tools that help understand these dependencies: madison, apt-rdepends, apt-cache, diff-manifest.
It’s an interesting problem, but there’s no good solution for the problem, as yet. But there are some steps towards one: - You can graph out seed-based dependencies; you can use rdepends to extract information for driving regression testing.
- Look at the bug trackers alongside the package mapping to see how past bugs/changes have created inter-dependencies. But how do you mine those bug trackers?
- For visualisaion, are you familiar with Gapminder? It shows changes of multidimensional data over time. (http://www.gapminder.org/)[gapminder.org]
- Consider using the Debian popcorn database to understand the numbers of people likely to be affected by changes.