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# Using Tox with the Jenkins Integration Server

## Using Jenkins multi-configuration jobs

The Jenkins continuous integration server allows to define “jobs” with “build steps” which can be test invocations. If you install `tox` on your default Python installation on each Jenkins slave, you can easily create a Jenkins multi-configuration job that will drive your tox runs from the CI-server side, using these steps:

- install the Python plugin for Jenkins under “manage jenkins”

- create a “multi-configuration” job, give it a name of your choice

- configure your repository so that Jenkins can pull it

- (optional) configure multiple nodes so that tox-runs are performed on multiple hosts

- configure `axes` by using TOXENV as an axis name and as values provide space-separated test environment names you want Jenkins/tox to execute.

- add a Python-build step with this content (see also next example):

      import tox
      tox.cmdline() # environment is selected by ``TOXENV`` env variable

- check `Publish JUnit test result report` and enter `**/junit-*.xml` as the pattern so that Jenkins collects test results in the JUnit XML format.

The last point requires that your test command creates JunitXML files, for example with `py.test` it is done like this:

> commands=py.test –junitxml=junit-{envname}.xml

## zero-installation for slaves

Note

This feature is broken currently because “toxbootstrap.py” has been removed. Please file an issue if you’d like to see it back.

If you manage many Jenkins slaves and want to use the latest officially released tox (or latest development version) and want to skip manually installing `tox` then substitute the above Python build step code with this:

    import urllib, os
    url = "https://bitbucket.org/hpk42/tox/raw/default/toxbootstrap.py"
    #os.environ['USETOXDEV']="1"  # use tox dev version
    d = dict(__file__='toxbootstrap.py')
    exec urllib.urlopen(url).read() in d
    d['cmdline'](['--recreate'])

The downloaded toxbootstrap.py file downloads all neccessary files to install `tox` in a virtual sub environment. Notes:

- uncomment the line containing `USETOXDEV` to use the latest development-release version of tox instead of the latest released version.
- adapt the options in the last line as needed (the example code will cause tox to reinstall all virtual environments all the time which is often what one wants in CI server contexts)

## Integrating “sphinx” documentation checks in a Jenkins job

If you are using a multi-configuration Jenkins job which collects JUnit Test results you will run into problems using the previous method of running the sphinx-build command because it will not generate JUnit results. To accomodate this issue one solution is to have `py.test` wrap the sphinx-checks and create a JUnit result file which wraps the result of calling sphinx-build. Here is an example:

1. create a `docs` environment in your `tox.ini` file like this:

       [testenv:docs]
       basepython=python
       changedir=doc # or whereever you keep your sphinx-docs
       deps=sphinx
           py
       commands=
           py.test --tb=line -v --junitxml=junit-{envname}.xml check_sphinx.py

2. create a `doc/check_sphinx.py` file like this:

       import py
       import subprocess
       def test_linkcheck(tmpdir):
           doctrees = tmpdir.join("doctrees")
           htmldir = tmpdir.join("html")
           subprocess.check_call(
               ["sphinx-build", "-W", "-blinkcheck",
                 "-d", str(doctrees), ".", str(htmldir)])
       def test_build_docs(tmpdir):
           doctrees = tmpdir.join("doctrees")
           htmldir = tmpdir.join("html")
           subprocess.check_call([
               "sphinx-build", "-W", "-bhtml",
                 "-d", str(doctrees), ".", str(htmldir)])

3. run `tox -e docs` and then you may integrate this environment along with your other environments into Jenkins.

Note that `py.test` is only installed into the docs environment and does not need to be in use or installed with any other environment.

## Access package artifacts between Jenkins jobs

In an extension to Access package artifacts between multiple tox-runs you can also configure Jenkins jobs to access each others artifacts. `tox` uses the `distshare` directory to access artifacts and in a Jenkins context (detected via existence of the environment variable `HUDSON_URL`); it defaults to to `{toxworkdir}/distshare`.

This means that each workspace will have its own `distshare` directory and we need to configure Jenkins to perform artifact copying. The recommend way to do this is to install the Jenkins Copy Artifact plugin and for each job which “receives” artifacts you add a Copy artifacts from another project build step using roughly this configuration:

    Project-name: name of the other (tox-managed) job you want the artifact from
    Artifacts to copy: .tox/dist/*.zip   # where tox jobs create artifacts
    Target directory: .tox/distshare     # where we want it to appear for us
    Flatten Directories: CHECK           # create no subdir-structure

You also need to configure the “other” job to archive artifacts; This is done by checking `Archive the artifacts` and entering:

    Files to archive: .tox/dist/*.zip

So our “other” job will create an sdist-package artifact and the “copy-artifacts” plugin will copy it to our `distshare` area. Now everything proceeds as Access package artifacts between multiple tox-runs shows it.

So if you are using defaults you can re-use and debug exactly the same `tox.ini` file and make use of automatical sharing of your artifacts between runs or Jenkins jobs.

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