~bzr-pqm/bzr/bzr.dev

***********************

Tracking Bugs in Bazaar

***********************

This document describes the bug-tracking processes for developing Bazaar

itself.  Bugs in Bazaar are recorded in Launchpad.

See also:

* `Bazaar Developer Documents <index.html>`_.

* `The Bazaar Development Cycle <cycle.html>`_.

* `The Bazaar User Guide <../en/user-guide/index.html>`_ -- for

  information on integrating Bazaar with other bug trackers.

Links

*****

* `bzr bugs home page <https://bugs.launchpad.net/bzr>`_.

* `Critical bugs <https://bugs.launchpad.net/bzr/+bugs?search=Search&field.importance=Critical&field.status=New&field.status=Incomplete&field.status=Confirmed&field.status=Triaged&field.status=In+Progress&field.status=Fix+Committed>`_.

* `Open bugs by importance <https://bugs.launchpad.net/bzr/+bugs>`_.

* `Open bugs most recently changed first

  <https://bugs.launchpad.net/bzr/+bugs?field.searchtext=&orderby=-date_last_updated&search=Search&field.status%3Alist=NEW&field.status%3Alist=INCOMPLETE_WITH_RESPONSE&field.status%3Alist=INCOMPLETE_WITHOUT_RESPONSE&field.status%3Alist=CONFIRMED&field.status%3Alist=TRIAGED&field.status%3Alist=INPROGRESS&field.status%3Alist=FIXCOMMITTED&field.assignee=&field.bug_reporter=&field.omit_dupes=on&field.has_patch=&field.has_no_package=>`_.

* `Most commonly duplicated bugs <http://tinyurl.com/bzr-bugs-by-dupes>`_.

Generalities

************

Anyone involved with Bazaar is welcome to contribute to managing our bug

reports.  **Edit boldly**: try to help users out, assess importance or improve

the bug description or status.  Other people will see the bugs: it's

better to have 20 of them processed and later change the status of a

couple than to leave them lie.

When you file a bug as a Bazaar developer or active user, if you feel

confident in doing so, make an assessment of status and importance at the

time you file it, rather than leaving it for someone else.  It's more

efficient to change the importance if someone else feels it's higher or

lower, than to have someone else edit all bugs.

It's more useful to actually ship bug fixes than to garden the bug

database.  It's more useful to take one bug through to a shipped fix than

to partially investigate ten bugs.  You don't get credit for a bug until

the fix is shipped in a release.  Users like getting a response to their

report, but they generally care more about getting bugs fixed.

The aim of investigating bugs before starting concentrated work on them is

therefore only to:

* determine if they are critical or high priority (and

  should displace existing work)

* garden sufficiently to keep the database usable: meaningful summaries,

  and duplicates removed

It's OK to fix some bugs that just annoy you, even if they're not

rationally high.

You can use ``--fixes lp:12345678`` when committing to associate the

commit with a particular bug.

If there are multiple bugs with related fixes, putting "[master]" in the

title of one of them helps find it

It's often fastest to find bugs just using the regular Google search

engine, rather than Launchpad's search.

Martin Pitt says:

 | One of the things you should not do often is to start asking

 | questions/for more debug info and then forget about the bug. It's just

 | a waste of the reporter's and your time, and will create frustration

 | on the reporter side.

Priorities

**********

The suggested priorities for bug work are:

1. Fix critical bugs.

2. Get existing fixes through review and landed.

3. Fix bugs that are already in progress.

4. Look at bugs already assigned to you, and either start them, or change

   your mind and unassign them.

5. Take new bugs from the top of the stack.

6. Triage new bugs.

It's not strict and of course there is personal discretion but our work

should be biased to the top of this hierarchy.

Clear Bugs

**********

Bugs should have clear edges, so that you can make a clear statement about

whether a bug is fixed or not.  (Sometimes reality is complicated, but aim

for each bug to be clear.)

Bugs on documentation, performance, or UI are fine as long as they're

clear bugs.

Examples of good bugs:

* "ValueError in frob_foo when committing changed symlink" - although

  there may be many possible things that could cause a ValueError there,

  you should at least know when you've fixed the problem described in this

  bug.

* "Unclear message about incompatible repositories" - even though the user

  may not agree the new message is sufficiently clear, at least you know

  when you've tried to fix it.

Examples of bad bugs:

* "Commit is too slow" - how fast is fast enough to close it?  "Commit

  reads the working tree twice" is clearer.

Bug Status

**********

New

    The bug has just been filed and hasn't been examined by a developer

    yet.

Incomplete

    The bug requires more information from the reporter to make progress.

    Only set this state if it's impossible or uneconomical to make

    progress on the bug without that information.  The bug will expire if

    it remains in this state for two months.

Confirmed

    The bug report has been seen by a developer and we agree it's a bug.

    You don't have to reproduce the bug to mark it Confirmed.  (Generally

    it's not a good idea for a developer to spend time reproducing the bug

    until they're going to work on it.)

Triaged

    We don't use this status.  If it is set, it means the same as

    Confirmed.

In Progress

    Someone has started working on this.  We can deliver the value of the

    work already done by finishing and shipping the fix.  

    The bug keeps this state from the time someone does non-trivial

    analysis, until the fix is merged to a release or trunk branch (when

    it is Fix Released), or until they give up on it (back to New or

    Confirmed) or decide it is Invalid or Incomplete.

Won't Fix

    The behaviour complained about is intentional and we won't fix it.

    Needless to say, be thoughtful before using this status, and consider if

    the user experience can be improved in some other way.

Invalid

    The reporter was confused, and this is not actually a bug.

    Again, be sensitive in explaining this to the user.

Fix Committed

    Don't use this.  If set on old bug, it probably means In Progress,

    with the fix waiting for review.  See Launchpad `bug 163694`_.

Fix Released

    The fix for this bug is now in the bzr branch that this task is for.

    The branch for the default task on a bug is bzr.dev.  

    We use this value even though the fix may not have been been included

    in a release yet because all the developer activity around it is

    complete and we want to both avoid bug spam when releases happen, and

    keep the list of bugs that developers see when they look at the bug

    tracker trimmed to those that require action. 

    When setting a bug task to fix released, the bug target milestone

    should be set to the release the fix will be included in (or was

    included in, if you are updating an old bug). Don't spend too much

    time updating this if you don't immediately know: its not critical

    that it be set.

.. _`bug 163694`: https://bugs.launchpad.net/launchpad/+bug/163694

Bug Importance

**************

Critical

    This is a serious bug that could cause data loss, stop bzr being

    usable in an important case, or represents a regression in something

    previously working.  We should fix critical bugs before doing other

    work, or seriously consider whether the bug is really critical

    or whether the other change is more urgent.

High

    This is a bug that can seriously interfere with people's use of

    Bazaar.  We should seriously consider fixing these bugs before

    working on new features.

Medium

    A regular bug.  We'd like to fix them, but there may be a long delay.

Low

    Something suboptimal that may affect an unimportant case or have a

    fairly easy workaround.

Wishlist

    These will basically never get done.

Bugs rated Medium or lower are unlikely to get fixed unless they either

pique the interest of a developer or are escalated due eg to many users

being affected.

Not every existing bug is correctly rated according to this scale, and we

don't always follow this process, but we'd like to do it more.  But

remember, fixing bugs is more helpful than gardening them.

Assignment

**********

Assigning a bug to yourself, or someone else, indicates a real intention

to work on that bug soon.

Targetting Bugs

***************

It's possible to target a bug to a milestone, eg

<https://bugs.launchpad.net/bzr/+milestone/1.16>.  We use this to help the

release manager know what **must** be merged to make the release.

Therefore, we don't target bugs that we'd like to have fixed or that could

be fixed in a particular release, we only target bugs that must be fixed

and that will cause us to slip the release if they're not fixed.  At any time,

very few if any of the bugs targeted to a release should be still open.  By

definition, these bugs should normally be Critical priority.

Backports

*********

Sometimes we'll want to make a special point-release update (eg 1.15.1)

off an already-released branch including a fix for a particular bug.  To

represent this, create a new bug task (ie link in the status table on the

bug page) by clicking the `poorly-named

<https://bugs.launchpad.net/bugs/132733>`_ "Target to Release" link.

Target it to the appropriate series (ie 1.15). If the bug should also

prevent any point releases of that series then you should also target the

new task to the appropriate milestone within that release. (See Targeting Bugs

above)

This bug task then has a separate status and importance to indicate the

separate work to get it into that release.

Release Notes

*************

Most bugs that are fixed should be mentioned in the `Release Notes

<../en/release-notes/>`_ for the forthcoming version,

including the bug number.

(Exceptions might be bugs that are not at all user visible.)

Tags

****

Here are some bug tags we use.  In Launchpad Bugs tags are currently of limited use, so don't feel obliged to tag bugs unless you're finding it useful.

authentication

    authenticating to servers

backport

    candidate for backporting to an update of the previous release

dirstate

    WorkingTree4

easy

    should be possible to finish in an hour or two

hpss

    bugs about the High-Performance Smart Server, i.e. bzr+ssh://, etc.

hpssvfs

    bugs for causes of VFS methods of the smart server

launchpad

    bugs about interactions with launchpad (typically this means bzrlib.plugins.launchpad).

locale

    problems using locales other than English

memory

    problems where we use too much memory for some reason

newformat

    fixing this would need a new disk format

performance

    bugs about performance problems.

regression

    bugs which represent an aspect of bzr becoming accidentally less good than it was.

test

    needs changes to the test framework

transport

    virtual filesystem for HTTP, SFTP, etc.

trivial

    should be very easy to fix (10-20 minutes) and easily landed: typically 

    just spelling errors and the like

ui

    bugs relating to the bzr user interface, e.g. confusing error messages.

win32

    bugs that mainly affects Windows. Also there is cygwin and win98 tags for 

    marking specific bugs.

You can see the full list of tags in use at

<https://bugs.launchpad.net/bzr/+bugs>.  As of September 2008 the

list is on the right. 

.. vim: ft=rst