tmux-continuum/scripts/continuum_save.sh

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#!/usr/bin/env bash
CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
source "$CURRENT_DIR/helpers.sh"
source "$CURRENT_DIR/variables.sh"
source "$CURRENT_DIR/shared.sh"
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supported_tmux_version_ok() {
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"$CURRENT_DIR/check_tmux_version.sh" "$SUPPORTED_VERSION"
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}
get_interval() {
get_tmux_option "$auto_save_interval_option" "$auto_save_interval_default"
}
auto_save_not_disabled() {
[ "$(get_interval)" -gt 0 ]
}
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enough_time_since_last_run_passed() {
local last_saved_timestamp="$(get_tmux_option "$last_auto_save_option" "0")"
local interval_minutes="$(get_interval)"
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local interval_seconds="$((interval_minutes * 60))"
local next_run="$((last_saved_timestamp + $interval_seconds))"
[ "$(current_timestamp)" -ge "$next_run" ]
}
fetch_and_run_tmux_resurrect_save_script() {
local resurrect_save_script_path="$(get_tmux_option "$resurrect_save_path_option" "")"
if [ -n "$resurrect_save_script_path" ]; then
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"$resurrect_save_script_path" "quiet" >/dev/null 2>&1 &
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set_last_save_timestamp
fi
}
acquire_lock() {
# Sometimes tmux starts multiple saves in parallel. We want only one
# save to be running, otherwise we can get corrupted saved state.
local lockdir_prefix="/tmp/tmux-continuum-$(current_tmux_server_pid)-lock-"
# The following implements a lock that auto-expires after 100...200s.
local lock_generation=$((`date +%s` / 100))
local lockdir1="${lockdir_prefix}${lock_generation}"
local lockdir2="${lockdir_prefix}$(($lock_generation + 1))"
if mkdir "$lockdir1"; then
trap "rmdir "$lockdir1"" EXIT
if mkdir "$lockdir2"; then
trap "rmdir "$lockdir1" "$lockdir2"" EXIT
return 0
fi
fi
return 1 # Someone else has the lock.
}
main() {
if supported_tmux_version_ok && auto_save_not_disabled && enough_time_since_last_run_passed && acquire_lock; then
fetch_and_run_tmux_resurrect_save_script
fi
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}
main