Self-generated metadata with LVFS

This weekend I finished the penultimate feature for the LVFS. Before today, when uploading firmware there was up to a 24h delay before the new firmware would appear in the metadata. This was because there was a cronjob on my home server downloading files every night from the LVFS site, running appstream-builder on them locally and then uploading the metadata back to the site. Not awesome at all.

Actually generating the metadata in the OpenShift instance was impossible, until today. Due to libgcab and libappstream-glib not being available on the RHEL 6.2 instance I’m using, I had to re-implement two things in Python:

  • Reading and writing Microsoft cabinet archives
  • Reading MetaInfo files and writing compressed AppStream XML

The two helper libraries (only really implementing the parts required, but patches welcome) are python-cabarchive and python-appstream. I’m not awesome at Python, so feedback (in the form of pull requests) welcome.

This means I’m nearly okay to be hit by a bus. Well, nearly; the final feature is to collect statistics about how many people are downloading each firmware file, and possibly collecting data on how many failures and successes there have been when actually applying the firmware. This is actually quite tricky to do without causing privacy issues and not doing double counting. I’ll do some more thinking and then write up a proposal, ideas welcome.

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hughsie

Richard has over 10 years of experience developing open source software. He is the maintainer of GNOME Software, PackageKit, GNOME Packagekit, GNOME Power Manager, GNOME Color Manager, colord, and UPower and also contributes to many other projects and opensource standards. Richard has three main areas of interest on the free desktop, color management, package management, and power management. Richard graduated a few years ago from the University of Surrey with a Masters in Electronics Engineering. He now works for Red Hat in the desktop group, and also manages a company selling open source calibration equipment. Richard's outside interests include taking photos and eating good food.

3 thoughts on “Self-generated metadata with LVFS”

  1. RHEL 6.2, really? The latest versions are RHEL 6.7 and 7.1, but maybe it’s a typo for 7.2 since you’re at the source.

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