bergercookie/tw-hooks

Collection of Taskwarrior hooks + detection and registration mechanism

Taskwarrior Hooks

Description

This is a collection of Taskwarrior hooks that I use in my day-to-day workflows. It comes along a detection and easy-registration mechanism that should make it easy to develop and then distribute your own hooks. The hooks are structured as classes under the tw_hooks/hooks directory.

Installation

Install it from PyPI:

pip3 install --user --upgrade tw_hooks

To get the latest version install directly from source:

pip3 install --user --upgrade git+https://github.com/bergercookie/tw-hooks

After the installation, you have to run the install-hooks-shims executable (which by this point should be in your $PATH). Running it will create shims (thin wrapper scripts) under ~/.task/hooks in order to register all the hooks with Taskwarrior.

Available hooks

Currently the following hooks are available out-of-the-box:

Hook	Description	Events
AutoTagBasedOnTags	Inspect the list of tags in the added/modified tasks provided and add additional tags if required	on-modify, on-add
CorrectTagNames	Change tag names based on a predefined lookup table	on-modify, on-add
DetectMutuallyExclusiveTags	See whether the user has specified an incompatible combination of tags	on-modify, on-add
PostLatestStartToI3Status	When a task is started, send the title of the task to i3status-rs via DBus	on-modify
WarnOnTaskCongestion	Warn the user if there are too many tasks (due:today)	on-exit

Structure of a Hook

The purpose of this package is to facilitate the development and distribution of Taskwarrior hooks. To this purpose install-hooks-shims allows you to easily register your own hooks, without having to manually copy items over to the taskwarrior hooks location. install-hooks-shims will install a shim which will call your hook automatically when required.

This is an example of a Taskwarrior hook that will be executed on Taskwarrior exit:

from tw_hooks import OnExitHook
class WarnOnTaskCongestion(OnExitHook):
    """Warn the user if there are too many tasks."""
    def _on_exit(self, _):  # <--- Mandatory to implement this signature
      # ...
      return 0

Assuming that this hook is in a module called warn_on_task_congestion.py and that the directory of this module is in your python path (e.g., by adding it explicitly to $PYTHONPATH), then you can run the following to register your hook with taskwarrior:

install-hooks-shims -r warn_on_task_congestion

During your next Taskwarrior operation, if there are too many due:today tasks, you should see something like this:

t add +test kalimera
Created task 719.
[WarnOnTaskCongestion] Too many due:today tasks [threshold=9]

Hooks API

Subclass one of the following base hooks, and your method is going to be called during that event:

• OnAddHook
  • Implement the _on_add(self, added_task: TaskT) method.
• OnExitHook
  • Implement the _on_exit(self, added_modified_tasks: List[TaskT]) method.
• OnLaunchHook
  • Implement the _on_launch(self) method.
• OnModifyHook
  • Implement the _on_modify(self, original_task: TaskT, modified_task: TaskT) method.

Usage instructions for install-hooks-shims

usage: Detect Taskwarrior hooks and register an executable shim for each one of them.
       [-h] [-t TASK_DIR] [-a] [-l]
       [-r REGISTER_ADDITIONAL [REGISTER_ADDITIONAL ...]]

optional arguments:
  -h, --help            show this help message and exit
  -t TASK_DIR, --task-dir TASK_DIR
                        Path to the taskwarrior main directory
  -a, --all-hooks       Install shims for all the hooks
  -l, --list-hooks      List the available hooks and exit
  -r REGISTER_ADDITIONAL [REGISTER_ADDITIONAL ...], --register-additional REGISTER_ADDITIONAL [REGISTER_ADDITIONAL ...]

Usage examples:
===============

- Install only the WarnOnTaskCongestion hook (assuming you've installed tw_hooks with e.g., pip3)
  install-hook-shims -r tw_hooks.hooks.warn_on_task_congestion

- Install all the available hooks from this repo (assuming you've installed tw_hooks with e.g., pip3)
  install-hook-shims --all-hooks

- Install a custom hook defined in .../dir/mod/hook_name.py. "dir" should be in your PYTHONPATH
  install-hook-shims -r mod.hook_name

- List all the available hooks and exit
  install-hook-shims --list-hooks

Miscellaneous

• Contributing Guide

FAQ

• Why should I use this over raw taskwarrior hooks?
  • Because this package does the heavy lifting pre-processing the input tasks from the command line. It does so in a robust manner making sure it does the right thing regardless of weather one or two commands are provided and being robust to errors (e.g., utf-8 decoding errors).
  • It takes care to make the hooks fail safely even if it can't find required modules (e.g., if you try invoking task from inside a virtualenv where tw-hooks is not importable.
  • It gives you a class-oriented approach and lets you install multiple hooks from the same class, thus allowing these hooks to share common configuration.
  • It allows you to keep all your hooks together and keep them as a package in some other place in your filesystem, e.g., in your dotfiles and automatically adds the right glue-code so that Taskwarrior your scripts without having to explicitly place it in ~/.task/hooks or symlinking it.

Self Promotion

If you find this tool useful, please star it on Github and consider donating.

Support

If something doesn't work, feel free to open an issue. You can also find me in the #taskwarrior Libera Chat.

TODO List

See ISSUES list for the things that I'm currently either working on or interested in implementing in the near future. In case there's something you are interesting in working on, don't hesitate to either ask for clarifications or just do it and directly make a PR.

tw-hooks's Issues

Geo-location based notifications.

The following might be of interest:

• https://stackoverflow.com/questions/64926202/get-real-location-using-python
• https://geocoder.readthedocs.io/api.html#house-addresses
• https://stackoverflow.com/questions/24906833/how-to-access-current-location-of-any-user-using-python

Hook for notifying user when a task in a task bundle starts / is completed