Michal and I debugged this over IRC, and tracked it down. He had an /etc/apt/apt.conf with explicitly setting Architecture:, and creating an apt.Cache(rootdir="...") object still takes that global configuration into account.
The attached test script works on a default installation, downloads the armhf saucy main index, and creates /tmp/r/var/lib/apt/lists/ports.ubuntu.com_dists_saucy_main_binary- armhf_Packages. But Michal has something like this config: echo 'APT::Architectures:: "amd64";' | sudo tee /etc/apt/apt.conf.d/01explicit_arch After doing that, running the test script shows the same failure: Err http://ports.ubuntu.com saucy/main amd64 Packages Get:4 http://ports.ubuntu.com saucy/main armhf Packages [1219 kB] [...] E:Some index files failed to download. They have been ignored, or old ones used instead. So, it might certainly be that I'm using python-apt wrongly here, but I would certainly expect apt.Cache(rootdir=/path/to/my/sandbox) to not consider anything from /etc/apt/? ** Attachment added: "test script" https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/1238616/+attachment/3874724/+files/test.py -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1238616 Title: creating apt cache with rootdir= still considers global apt config To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/1238616/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
