tmux-resurrect/docs/hooks.md

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# Save & Restore Hooks
Hooks allow to set custom commands that will be executed during session save
and restore. Most hooks are called with zero arguments, unless explicitly
stated otherwise.
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Currently the following hooks are supported:
- `@resurrect-hook-post-save-layout`
Called after all sessions, panes and windows have been saved.
Passed single argument of the state file.
- `@resurrect-hook-post-save-all`
Called at end of save process right before the spinner is turned off.
- `@resurrect-hook-pre-restore-all`
Called before any tmux state is altered.
- `@resurrect-hook-pre-restore-pane-processes`
Called before running processes are restored.
### Examples
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Here is an example how to save and restore window geometry for most terminals in X11.
Add this to `.tmux.conf`:
set -g @resurrect-hook-post-save-all 'eval $(xdotool getwindowgeometry --shell $WINDOWID); echo 0,$X,$Y,$WIDTH,$HEIGHT > $HOME/.tmux/resurrect/geometry'
set -g @resurrect-hook-pre-restore-all 'wmctrl -i -r $WINDOWID -e $(cat $HOME/.tmux/resurrect/geometry)'