paction

Execute actions relative to process existance.

Configuration

The configuration may contain multiple actions, each with multiple or singular criteria. Default location is ~/.config/paction/config.toml, see paction --help for more options. Copy the sample config for reference when configuring.

Example config

Stop picom when either CS:GO or THUG Pro and OBS Studio is running - to get those extra frames you know. Once criteria is no longer met, start picom again.

tick = 500

[[action]]
name = "some action" # Name used in output
exec = ["pkill", "picom"]
undo = ["picom"]

# CS:GO or THUG Pro must be running by the same user as paction
[[action.criteria]]
user = ["$USER"]
name = ["csgo_linux64", "THUGPro.exe"]
cmd = []

# OBS Studio must ALSO be running
# By either "someuser", 1001 or the same user as paction
# With the switch --startreplaybuffer
[[action.criteria]]
user = ["someuser", 1001, "$USER"]
name = ["obs"]
cmd = ["--startreplaybuffer"]

Running as service

For X display support (e.g. start a GUI program on exec) I recommend running as a user service. Note however that the service may need to be modified to start after your display manager, otherwise certain actions/scripts requiring $DISPLAY might not work when the service is automatically started.

Personally I have no valid After= target for the service because I don't use a display manager, so I just add systemctl --user start paction in .xinitrc and omit enabling the service.