Hooks v2
The API defined here is the [Hooks v2] API. This API is part of the TaskWarrior 2.4.3 release.
Events
No change.
Input
No change.
Output
No change.
Exit Status
No change.
Interfaces
No change.
Command Line Arguments
To support an evolving Hooks API, Taskwarrior must provide hook scripts with a mechanism for determining which version of the Hooks API is providing the context for the script. It is anticipated that in future versions, new events will be added, and changes to the interfaces will occur. A hook script needs to act according to the API version, otherwise it risks incompatibility with Taskwarrior.
The interfaces define what is provided as standard input, and what is expected on standard output.
With v2 there will also be command line arguments provided to the script.
A script may take advantage of the v2 enhancements though, to extend its capabilities.
| Argument | Meaning |
|---|---|
api:2 | The 2 specified means Hooks API v2. This will be a monotonically increasing number, as the Hooks API evolves. The only possible value for this argument is currently 2, because the v1 API does not provide command line arguments. |
args:task ... | The script has read-only access to the command line that Taskwarrior received. |
command:add|done|sync|... | The command Taskwarrior recognized in its command line arguments. |
rc:/path/to/.taskrc | Absolute path of rc file used by Taskwarrior after all overrides have been applied. |
data:/path/to/task/folder | Absolute path of folder containing Taskwarrior’s data. |
version:x.y.z | Taskwarrior version calling the hook. Same as the one reported by task --version, e.g. 2.4.3 |
Here is a contrived example simulating how a hook script will be invoked:
$ ~/.task/hooks/on-xxx.yyy \
api:2 \
args:'task rc:~/mytaskrc list' \
command:add \
rc:/home/foo/mytaskrc \
data:/home/foo/.task \
version:2.4.3 \
<input.txt \
>output.txt
This information can be used by the script to see that an alternate rc file was specified on the command line.
Backward Compatibility
The v1 and v2 API is identical, so any hook script will run unmodified in both scenarios.
This may not be true for future versions.
A script that requires v2 but is run in a v1 context should issue a warning that it is not able to perform its function, but it should not fail.