britney2-ubuntu fork which runs on
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Simon Quigley 3f17590c3b
Add argument to save_state().
4 years ago
britney2 Add argument to save_state(). 4 years ago
ci Add simple RC bugs unit test 7 years ago
doc Fixed a typo in the doxygen.conf file 12 years ago
tests autopkgtest: When we're missing builds on non-adt arches only, go ahead and run the tests 4 years ago
.coveragerc Add simple RC bugs unit test 7 years ago
.gitignore Add a .gitignore file. 16 years ago
.travis.yml Minimal fixes to make .travis.yml usable 4 years ago
BUGS At this point, we could schedule a periodic diff between the original excuses and the new ones; everything seems to be the same (excluding the usual bugs in the 16 years ago
INSTALL Don't use aptitude ever 6 years ago
LICENSE Initial import, excuses generation almost working. 18 years ago Add a quick-start guide incl. a template conf 8 years ago
TODO TODO: fix typoes; thanks, Julien Cristau 13 years ago
britney.conf Drop riscv64 from BREAK/NEW arches 4 years ago
britney.conf.template Pull defaults for Components and Architectures from Release 7 years ago Add JenkinsPassPolicy to block packages if their associated Jenkins job has not passed. 4 years ago
britney_nobreakall.conf Re-add missing SRU members to the britney.conf hint permissions. 5 years ago
run-autopkgtest autopkgtest: store the submission time when making requests 4 years ago

Britney - Keeps suites installable and up to date

Britney is a program to compute an update of a Debian-based package suite by feeding it updates from (one or more) source-suite(s). A few known use cases:

  • Debian uses it to update testing based on unstable
  • Ubuntu uses it to update their latest development suite using a "hidden" -proposed-updates suite as source

Britney's primary goal is too keep packages in the target suite installable (e.g. Debian testing) while keeping it up to date with its primary source suite (e.g. Debian unstable).

Quick setup guide

This is a very brief intro to the steps required to setup a Britney instance.

  • Copy "britney.conf.template" and edit it to suit your purpose
    • If you want Britney to bootstrap your target suite, you probably want to add all architectures to "NEW_ARCHES" and "BREAK_ARCHES" for a few runs
  • Create the following files (they can be empty):
    • $STATE_DIR/age-policy-dates
    • $STATE_DIR/age-policy-urgencies
    • $STATE_DIR/rc-bugs-unstable
    • $STATE_DIR/rc-bugs-testing
  • Run ./ -c $BRITNEY_CONF -v [--dry-run] to test the run
  • Use the resulting $HEIDI_OUTPUT (or $HEIDI_DELTA_OUTPUT) to update your target suite.
    • With dak, cut -d" " -f1-3 < ${HEIDI_OUTPUT} | dak control-suite --set ${TARGET_SUITE} [--britney]
  • Setup a cron-/batch-job that:
    • (Optionally) Updates the rc-bugs files
    • (Optionally) Updates the $STATE_DIR/age-policy-urgencies
    • Runs Britney
    • Imports the result into your target suite

Migration items

Britney generally works with a "migration item", which is a group of binary packages (and possibly a source package). Packages are bundled into these migration items under the following rules:

  1. "source migration": An update of the source package. This will include all the binary packages built from that source version (regardless of architecture).
    • Can contain binaries built from earlier source version depending on the setting of "IGNORE_CRUFT"
    • Britney refers to these as "${SOURCE_NAME}"
  2. "binary migration": An update of binary packages on a given architecture to an existing source package in the target suite.
    • Two common cases: Built for the first time on a new architecture and binNMUs
    • Britney refers to all cases of these as "{SOURCE_NAME}/{ARCHITECTURE}"
  3. "removal item": A removal of a source or binary package.
    • Note that it is only possible to trigger "source" removals via hints. Binary removals are items generated by Britney to clean up the target suite.
    • Britney refers to these as "-{SOURCE_NAME}" or "-{BINARY_NAME}/${ARCHITECTURE}" depending on the case.

Migration rules (excuses/policies)

Britney applies a number of policies to migration items before attempting to migrate them to the target suite. These policies can "reject" a package and prevent it from migrating. Some policies/built-in rules:

  • Age policy: Lets source migrations age a bit before they are allowed to migrate
    • Supports variable length based on package urgency
  • RC Bug policy: Rejects packages with regressions in RC bugs
    • Requires an external tool to keep the bug lists up to date
  • Keeps architectures in sync: Source migrations updating existing packages only occur if architectures are up to date
    • Can be configured to ignore certain architectures.