SageMath has two build bots.

Release Buildbot

The first builds entire tarballs (e.g. all the development releases) on a wide variety of machines. It can be found at .

Patch Buildbot (Patchbot)

The second pulls and applies git branches from Trac and can be found at or from links on the individual Trac tickets (round icons at top right).

You can help by running your own patchbot. See below for instructions about installation and usage.

See a list of patchbot names and their owners at buildbot/owners.

This is still very much a work in progress. The latest version of the code lives at

Lists of reports

You can see the status of several tickets at the same time (replace xxxx by your user name) :

For the tickets you participated in, see

For the tickets you authored, see

Ticket Status

The color of the report page icon indicates the status of the ticket. See the report page itself for more details. The possible statuses are: New Pending A patchbot is currently running on this ticket. The patchbot may have stopped if the ticket was deemed unsafe. TestsPassed Everything is okay, as far as a patchbot can tell. ApplyFailed The branch could not be applied. This can be caused by conflicts with other branches or dependencies. Try rebase your branch on the latest develop branch. BuildFailed The branch can be applied, but sage failed to build, due to errors in the code. Check the code. TestsFailed One or more tests did not succeed. PluginFailed Tests have been successfully done, but plugins have found some problems. PluginOnlyFailed Plugin have found some problems. Tests have not been made. PluginOnly Plugins have found no problem. Tests have not been made. NoPatch No branch has been uploaded to Trac so far. The patchbot has nothing to do. Spkg This is related to an spkg. The patchbot will only check the spkg installation.

Hints and tricks

Installing the patchbot

It is safer to run the patchbot in an unused sage install.

WARNING: Install mode has changed a lot with patchbot ≥ 2.6.0

These are the new instructions.

① Install the patchbot using pip install --user git+

Dependencies: shell commands git; tar; wget

Please register here if you run a patchbot. It is required to know whom to contact.

You can instead use the --owner option.

Running the patchbot

② Run the patchbot using python -m sage_patchbot.patchbot --sage-root=XXXX

The patchbot should now run just the same with pip3 and python3 instead. Please report any problem.

The --sage-root parameter is required.

Your patchbot will run forever, as long as it finds a ticket to work on. Tickets are only considered if their authors are trusted.

You can let the patchbot choose the tickets it will run on.

You can run a specific ticket by using --ticket=N where N is a ticket number such as 12345.

Several other options are available, see --help

--skip-base will skip the check that the base sage installation is sane.

--plugin-only will only build (sage and the doc) and run the plugins but not the tests (much quicker but less useful).

--safe-only will only test branches that only change files inside the directory "src/sage" (this is the case by default).


By default, the patchbot should run without needing to tune its configuration. You can use a specific configuration file in the json format and run the patchbot with the option


The json format mostly looks like a python dictionary. Here is an example of a valid configuration file

    {"bonus": {"niceguy": 200, "needs_work": -20},
     "use_ccache": false,
     "safe_only": true,
     "skip_base": true,
     "time_of_day": "22-7",
     "parallelism": 8

Note that the booleans must be written with no capital first letter.

The config will be read again between every run, hence it allows live configuration of the patchbot.

The list of configurable entities are:








(example "0-0" or "22-7") an interval of time during which the patchbot is active



see below

some bonus to influence the order in which tickets are tested (see below)




a list of logins or full names who will be considered as trusted




whether to only test "safe" tickets modifying only src/sage or src/doc




whether to run testlong on the base before testing tickets




the number of threads to execute when compiling or testing




seconds to wait when network is not working or there are no tickets available







the name of the git branch to synchronized with the develop branch on trac



the path to the directory containing the sage installation


list of strings

see below

the plugins to use


There are two kinds of bonus, the one related to tickets:

and the one related to other bot reports:

The defaults are

 bonus = {
     "blocker"        : 100,
     "critical"       : 60,
     "major"          : 10,
     "minor"          : 0,
     "needs_review"   : 1000,
     "positive_review": 500,
     "needs_info"     : 0,
     "needs_work"     : 0
     "unique"         : 40,
     "applies"        : 20,
     "behind"         : 1

But you could add

 bonus = {
     "vbraun": 10,
     "inconito": -5,
     "linear programming": 200,
     "finance": -200
     "14382": 100,
     "15777": 100

Looking at patchbot activities

Remotely, you can have a look at the last tickets tested by patchbots here:

On your machine, the patchbot writes a summary of its activities in $SAGE_ROOT/logs/patchbot/history.txt

using an ipython session

You can try the patchbot inside a ipython session, as follows.

First, in the sage directory, create a branch "patchbot/base" by

git checkout develop -b patchbot/base


cd sage-patchbot/

launch ipython and (for patchbot version ≥ 2.6.2)

from sage_patchbot.patchbot import Patchbot

opt = {'sage_root': '/home/platon/sage/', 'owner': 'Sophocle'}

P = Patchbot(opt)

P.test_a_ticket(14974)   # just test one ticket and stop

P.test_some_tickets([14974, 19876, 20202])  # test several tickets in the given order

The argument dictionary must contain at least (patchbot version ≥ 2.6.2):

{'sage_root': path to the sage local repository}

buildbot (last edited 2017-02-24 13:02:42 by chapoton)