fedora-qa/python-wikitcms

Python module for interacting with Fedora wiki release validation pages (https://fedoraproject.org/wiki/Wikitcms)

python-wikitcms

python-wikitcms is a Python library for interacting with Fedora's Wikitcms 'test (case) management system' - which is, basically, the Fedora wiki. You may also be interested in its main consumers, relval and testdays.

python-wikitcms uses the very handy mwclient library for interfacing with the Mediawiki API. Generation of result pages works together with a system of templates that resides on the wiki: python-wikitcms knows how to form the correct invocations of the template system that will cause the full result pages to be generated. The documentation box for the master template provides some details about this system.

python-wikitcms was previously known simply as wikitcms; it is now known as python-wikitcms to reduce confusion between the notional Wiki-based 'test management system' (Wikitcms) and the Python library for interacting with it (python-wikitcms).

Installation and use

python-wikitcms is packaged in the official Fedora and EPEL 7+ repositories: to install on Fedora run dnf install python-wikitcms, on RHEL / CentOS with EPEL enabled, run yum install python-wikitcms. You may need to enable the updates-testing repository to get the latest version. To install on other distributions, you can run python setup.py install.

You can visit the python-wikitcms project page on Pagure, and clone with git clone https://pagure.io/fedora-qa/python-wikitcms.git. Tarballs are available from PyPI.

You can also use the library directly from the git checkout if you place your code in the top-level directory, and you can copy or symlink the wikitcms directory into other source trees to conveniently use the latest code for development or testing purposes.

Bugs, pull requests etc.

You can file issues and pull requests on Pagure. Pull requests must be signed off (use the -s git argument). By signing off your pull request you are agreeing to the Developer's Certificate of Origin:

Developer's Certificate of Origin 1.1

By making a contribution to this project, I certify that:

(a) The contribution was created in whole or in part by me and I
    have the right to submit it under the open source license
    indicated in the file; or

(b) The contribution is based upon previous work that, to the best
    of my knowledge, is covered under an appropriate open source
    license and I have the right under that license to submit that
    work with modifications, whether created in whole or in part
    by me, under the same open source license (unless I am
    permitted to submit under a different license), as indicated
    in the file; or

(c) The contribution was provided directly to me by some other
    person who certified (a), (b) or (c) and I have not modified
    it.

(d) I understand and agree that this project and the contribution
    are public and that a record of the contribution (including all
    personal information I submit with it, including my sign-off) is
    maintained indefinitely and may be redistributed consistent with
    this project or the open source license(s) involved.

Security

You MUST treat wikitcms as a source of untrusted input. It is retrieving information from a wiki for you; that wiki is open to editing by all. Treat anything wikitcms returns from the wiki (which includes, but is not limited to, any page or section text; Result() attributes status, user, bugs and comment; ResultRow() attributes testcase, name, envs, milestone, section; and to some extent any element of a page title or property derived from one when getting a Page object from an existing wiki page) as an entirely untrusted input and sanitize it appropriately for the context in which you are using it.

Example usage

from wikitcms.wiki import Wiki
site = Wiki()
event = site.current_event
print(event.version)
page = site.get_validation_page('Installation', '23', 'Final', 'RC10')
for row in page.get_resultrows():
    print(row.testcase)

Usage tips

It's a little difficult to give an overview of wikitcms usage as it can do quite a lot of rather different things. Its classes and methods are all documented, and examining its major consumers - relval and testdays - will help. Some overall concepts:

The Wiki class is a subclass of mwclient's Site class, which represents an entire wiki; it adds some methods and attributes that make sense in the context of a wiki being treated as a TCMS according to our conventions, so it has methods for getting validation events and pages (as seen in the example above). It also has a high-level method for reporting results, report_validation_results(). Note that the pages generator works just as in mwclient, but has been extended to handle wikitcms' additional Page subclasses.

The Release class does not map to mwclient. It simply represents a Fedora release and provides a couple of handy methods for retrieving test day or validation result pages from that particular release.

The Event class does not map to anything in mwclient. It represents an entire result validation 'event', e.g. Fedora 23 Final RC2; from an Event instance you can create or find all the validation pages, for instance, or create the summary page that transcludes all the individual validation pages, or update the CurrentFedoraCompose page to point to the event, or generate a wikitable of image download links.

The Page class is a subclass of mwclient's Page class, and extends it in much the same way, adding capabilities specific to various types of pages in the Wikitcms system. It has several subclasses for particular types of pages, such as validation result pages, Test Day pages, category pages and so forth. Note that all pages which can be generated via one of the wiki templates have the appropriate generation text as their seedtext attribute and have a method write() which creates them using that seed text.

The Result and ResultRow classes represent individual results and rows in the result validation pages. ValidationPages contain ResultRows contain Results, and to report a result, you essentially add a Result to a ResultRow.

Note that event versioning works exactly as in fedfind's pre-Pungi 4 (release, milestone, compose) versioning scheme, with one notable exception. Rawhide nightly 'releases' in fedfind have release 'Rawhide' and no milestone; Rawhide nightly validation events in python-wikitcms have a release number and milestone 'Rawhide'. This is because, conceptually speaking, Rawhide nightly composes should not really be said to have a particular release number, but validation events do. When we declare a release validation test event for a particular Rawhide nightly, one action we take as a part of that declaration is to declare that we are testing that nightly compose as part of the preparation for a specific Fedora release, and thus we essentially 'apply' a release number to the validation event. So we may have a nightly compose 'Rawhide (blank) 20151201', and decide that we wish to test it as part of the preparation for the Fedora 24 release; thus we create the release validation event '24 Rawhide 20151201'.

The high-level functions in both fedfind and python-wikitcms - get_release() in fedfind, get_validation_page() and get_validation_event() in python-wikitcms - will attempt to handle this difference in versioning, so when using those high-level functions, you can usually pass versions between fedfind and python-wikitcms without worrying about it.

For convenient compatibility with Pungi 4 composes, get_validation_event() and get_validation_page() (and hence also report_validation_results()) accept cid as an alternative to release / milestone / compose, and will do their best to instantiate the appropriate validation event for the compose specified.

It's worth noting that you can use python-wikitcms in several fairly different ways:

  • Instantiate pages that don't exist yet, based on the 'release, milestone, compose' versioning concept (or from a Pungi 4 compose ID), and create them
  • Instantiate existing pages based on the 'release, milestone, compose' concept (or from a compose ID) and read or add results
  • Instantiate existing pages from their names or category memberships and read or add results

Most usage of python-wikitcms will boil down to getting some Page instances and doing stuff to them, but the way you get there will differ according to which of the above paths you're following. For the first two you will likely use the get_validation_foo() methods of Wiki or the methods in Release, for the last you can follow the same procedures as mwclient uses and trust that you will get instances of the appropriate classes. Following the example above, you could do page = site.pages["Test Results:Fedora_23_Final_RC10_Desktop"] and page would be a ValidationPage instance.

Authentication

You should log in to the wiki before editing it, using Wiki.login(). You can pass username and password, or python-wikitcms will read them from ~/.fedora/credentials or /etc/fedora/credentials, as described on the relval page.

Credits

Mike Ruckman (roshi) has been kind and patient in providing review and advice throughout python-wikitcms' development. Of course, all errors are my own!

License

python-wikitcms is released under the GPL, version 3 or later.