Extending afew

You can put python files in ~/.config/afew/ and they will be imported by afew. If you use that python file to define a Filter class and use the register_filter decorator then you can refer to it in your filter configuration.

So an example small filter you could add might be:

from afew.filters.BaseFilter  import Filter
from afew.FilterRegistry import register_filter

    'fabric': 'deployment',
    'oldname': 'new-name',

class RedmineFilter(Filter):
    message = 'Create tag based on redmine project'
    query = 'NOT tag:redmine'

    def handle_message(self, message):
        project = message.get_header('X-Redmine-Project')
        if project in PROJECT_MAPPING:
            project = PROJECT_MAPPING[project]
        self.add_tags(message, 'redmine', project)

We have defined the message and query class variables that are used by the parent class Filter. The message is printed when running with verbose flags. The query is used to select messages to run against - here we ensure we don’t bother looking at messages we’ve already looked at.

The handle_message() method is the key one to implement. This will be called for each message that matches the query. The argument is a notmuch message object and the key methods used by the afew filters are get_header(), get_filename() and get_thread().

Of the methods inherited from the Filter class the key ones are add_tags() and remove_tags(), but read about the Implementation or just read the source code to get your own ideas.

Once you’ve defined your filter, you can add it to your config like any other filter: