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0watch

Copyright Bastian Eicher et al

Introduction

0watch scans websites for new releases using arbitrary Python code snippets. When new releases are detected 0template is used to create/update a Zero Install feed.

To make the 0watch command available on your command-line you can run:

0install add 0watch http://0install.de/feeds/0watch.xml

To use 0watch you need both a template file named like MyApp.xml.template and watch file named like MyApp.watch.py in the same directory. You can then run:

0watch MyApp.watch.py

Details

A watch file is a Python script that pulls a list of releases from a website. It must set an attribute named releases to an array of dictionaries. Each array element represents to a single release and each dictionary tuple is a variable substitution for the template.

A basic watch file could look like this:

from urllib import request
import json
data = request.urlopen(request.Request('https://api.github.com/repos/myproj/myapp/releases')).read()
releases = [{'version': release['tag_name'], 'released': release['published_at'][0:10]} for release in json.loads(data)]

For each release reported by the watch file 0watch attempts to determine whether the version is already known. It does this by:

  • checking if a file named MyApp-VERSION.xml exists in the same directory and
  • checking if a file named MyApp.xml exists in the same directory and contains an implementation with the version.

0watch then calls 0template once for each new release.

Conditions

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

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scans websites for new releases and triggers 0template if required

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