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Convert Slackware ChangeLog to various formats

Project description

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slacklog – Convert Slackware Changelog to various formats

slacklog provides programs and a library to convert a Slackware ChangeLogs into other formats. Currently, RSS, Atom, JSON, and PyBlosxom formats are supported.

Basic usage

Typical usage of the program looks like this:

$ slacklog2rss --changelog slackware-current/ChangeLog.txt \
               --encoding iso8859-1 \
               --out ~/public_html/slackware-current.rss \
               --slackware "Slackware current" \
               --rssLink "" \
               --description "Slackware current activity" \
               --managingEditor " (Mikko Värri)" \
               --webMaster " (Mikko Värri)"

The included Python library provides the ability to make custom formats easily:

#!/usr/bin/env python
from __future__ import print_function
import codecs
import locale
from slacklog.parsers import SlackLogParser

def read(file):
    '''Return file contents as Unicode.'''
    return, 'r', 'iso8859-1').read()

def write(str):
    '''Print out in preferred encoding.'''

# Parse the ChangeLog
log = SlackLogParser().parse(read('ChangeLog.txt'))

# Just an example of walking the log tree and print it out
for entry in log.entries:
    write(u'[%s] %s\n' % (entry.timestamp.isoformat(), entry.description))
    for pkg in entry.pkgs:
        write(u'%s:%s' % (pkg.pkg, pkg.description))

Note that slacklog package deals solely in Unicode; parser expects to be given Unicode input and formatters generate Unicode data.


In addition to Python, python-dateutil is required.

Python versions 2.7 and 3.4 - 3.7 are tested, together with python-dateutil versions 2.1 - 2.8.


Use either pip install slacklog or download the source archive and use python install.

The source code is available at Python Package Index (PyPI) or, if you want the unreleased version, from Github git repository.

Trying it in Docker

Here’s one way to hack on this inside a container:

$ docker run --rm -it -v $(pwd):/slacklog -w /slacklog python:3.7-alpine3.8 sh
# apk add --no-cache curl
# pip install python-dateutil==2.7.3
# python install
# sh examples/
# sh examples/

Obviously, you need Docker installed and working, and I’m assuming you run those commands in the git clone.


Original author and current maintainer is Mikko Värri (


slacklog is Free Software, licensed under GNU General Public License (GPL), version 3 or later. See LICENSE.txt file for details.

Release history

Version 0.9.6 (2019-03-14)

Fixed a bug in text formatter when the original timestamp is in 12-hour format.

Added Python 3.7 and dateutil 2.8 into test matrix.

Deprecated PyBlosxom formatter.

Version 0.9.5 (2018-10-02)

This release adds the JSON formatter.

As for dependencies, support for Python 3.3 was dropped since it had it’s end-of-life a year ago. Also, dateutil 2.7 is tested to be good.

Version 0.9.4 (2017-09-03)

The parser subclass can now overwrite the generation of entry identifier and/or checksum.

Other than that, tests were updated to use python-dateutil 2.6.1, and documentation was fixed.

Version 0.9.3 (2017-08-23)

This release is mainly bug fixing. RSS and atom formatters learnt to take the feed build time (optionally) as an argument, which makes them more testable.

Version 0.9.2 (2017-05-25)

This release is backwards incompatible with the previous releases: SlackLogParser and SlackLogFormatter (and subclasses) have to be instantiated, and instead of using class methods, instance methods and properties have to be used.

Version 0.9.1 (2017-05-24)

This release adds checksum, identifier, and parent fields to SlackLogEntry. Also, a couple of bugs with recognizing package names was resolved.

Verions 0.9.0 (2017-04-05)

After almost six years with only maintenance releases, it’s time to move to beta.

This release switches from distutils to setuptools, and contains some refactoring to scripts (pure refactoring, no changes in the CLI).

Version 0.0.9 (2017-04-04)

This release does not add any new functionality.

The dependencies were updated: Python 2.7, 3.3 - 3.6, and python-dateutil 2.1 - 2.6. Support for Python 2.6 was dropped, not because it doesn’t work but because Python core team doesn’t support it.

The code was formatted according to PEP-8, and the example script was updated to include Slackware versions 14.0 and 14.2.

Version 0.0.8 (2014-09-28)

This release does not add any new functionality, but includes support for Python 3.

In addition, Slackware{,64} 14.1 was added to the example script, and Travis CI and ReadTheDocs were integrated (see the links at the top of the README).

Version 0.0.7 (2011-06-16)

This release adds Atom feed formatter, and fixes compatibility issue with recent ChangeLog.txt format change which caused empty entries to be generated. Also, Slackware{,64} 13.37 was added to the example script.

Version 0.0.6 (2011-03-18)

This release adds documentation.

Version 0.0.5 (2011-03-17)

This release adds the example script in source distribution, too.

Version 0.0.4 (2011-03-17)

This release contains better error handling, better compatibility with more feed readers, better support for timezones other that UTC, and an example script suitable for a cron job to update RSS feeds.

Version 0.0.3 (2011-02-21)

Added PyBlosxom formatter and fixed a couple of issues.

Version 0.0.2 (2011-01-29)

Packaging cleanups.

Version 0.0.1 (2011-01-28)

Initial release.

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