tmux-resurrect/scripts/save.sh

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#!/usr/bin/env bash
CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
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source "$CURRENT_DIR/variables.sh"
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source "$CURRENT_DIR/helpers.sh"
source "$CURRENT_DIR/spinner_helpers.sh"
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# delimiters
d=$'\t'
delimiter=$'\t'
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# if "quiet" script produces no output
SCRIPT_OUTPUT="$1"
grouped_sessions_format() {
local format
format+="#{session_grouped}"
format+="${delimiter}"
format+="#{session_group}"
format+="${delimiter}"
format+="#{session_id}"
format+="${delimiter}"
format+="#{session_name}"
echo "$format"
}
pane_format() {
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local format
format+="pane"
format+="${delimiter}"
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format+="#{session_name}"
format+="${delimiter}"
format+="#{window_index}"
format+="${delimiter}"
format+=":#{window_name}"
format+="${delimiter}"
format+="#{window_active}"
format+="${delimiter}"
format+=":#{window_flags}"
format+="${delimiter}"
format+="#{pane_index}"
format+="${delimiter}"
format+=":#{pane_current_path}"
format+="${delimiter}"
format+="#{pane_active}"
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format+="${delimiter}"
format+="#{pane_current_command}"
format+="${delimiter}"
format+="#{pane_pid}"
format+="${delimiter}"
format+="#{history_size}"
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echo "$format"
}
window_format() {
local format
format+="window"
format+="${delimiter}"
format+="#{session_name}"
format+="${delimiter}"
format+="#{window_index}"
format+="${delimiter}"
format+="#{window_active}"
format+="${delimiter}"
format+=":#{window_flags}"
format+="${delimiter}"
format+="#{window_layout}"
echo "$format"
}
state_format() {
local format
format+="state"
format+="${delimiter}"
format+="#{client_session}"
format+="${delimiter}"
format+="#{client_last_session}"
echo "$format"
}
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dump_panes_raw() {
tmux list-panes -a -F "$(pane_format)"
}
dump_windows_raw(){
tmux list-windows -a -F "$(window_format)"
}
toggle_window_zoom() {
local target="$1"
tmux resize-pane -Z -t "$target"
}
_save_command_strategy_file() {
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local save_command_strategy="$(get_tmux_option "$save_command_strategy_option" "$default_save_command_strategy")"
local strategy_file="$CURRENT_DIR/../save_command_strategies/${save_command_strategy}.sh"
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local default_strategy_file="$CURRENT_DIR/../save_command_strategies/${default_save_command_strategy}.sh"
if [ -e "$strategy_file" ]; then # strategy file exists?
echo "$strategy_file"
else
echo "$default_strategy_file"
fi
}
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pane_full_command() {
local pane_pid="$1"
local strategy_file="$(_save_command_strategy_file)"
# execute strategy script to get pane full command
$strategy_file "$pane_pid"
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}
number_nonempty_lines_on_screen() {
local pane_id="$1"
tmux capture-pane -pJ -t "$pane_id" |
sed '/^$/d' |
wc -l |
sed 's/ //g'
}
# tests if there was any command output in the current pane
pane_has_any_content() {
local pane_id="$1"
local history_size="$(tmux display -p -t "$pane_id" -F "#{history_size}")"
local cursor_y="$(tmux display -p -t "$pane_id" -F "#{cursor_y}")"
# doing "cheap" tests first
[ "$history_size" -gt 0 ] || # history has any content?
[ "$cursor_y" -gt 0 ] || # cursor not in first line?
[ "$(number_nonempty_lines_on_screen "$pane_id")" -gt 1 ]
}
capture_pane_contents() {
local pane_id="$1"
local start_line="-$2"
local pane_contents_area="$3"
if pane_has_any_content "$pane_id"; then
if [ "$pane_contents_area" = "visible" ]; then
start_line="0"
fi
# the printf hack below removes *trailing* empty lines
printf '%s\n' "$(tmux capture-pane -epJ -S "$start_line" -t "$pane_id")" > "$(pane_contents_file "save" "$pane_id")"
fi
}
save_shell_history() {
if [ "$pane_command" = "bash" ]; then
local history_w='history -w'
local history_r='history -r'
local accept_line='C-m'
local end_of_line='C-e'
local backward_kill_line='C-u'
elif [ "$pane_command" = "zsh" ]; then
# fc -W does not work with -L
# fc -l format is different from what's written by fc -W
# fc -R either reads the format produced by fc -W or considers
# the entire line to be a command. That's why we need -n.
# fc -l only list the last 16 items by default, I think 64 is more reasonable.
local history_w='fc -lLn -64 >'
local history_r='fc -R'
local zsh_bindkey="$(zsh -i -c bindkey)"
local accept_line="$(expr "$(echo "$zsh_bindkey" | grep -m1 '\saccept-line$')" : '^"\(.*\)".*')"
local end_of_line="$(expr "$(echo "$zsh_bindkey" | grep -m1 '\send-of-line$')" : '^"\(.*\)".*')"
local backward_kill_line="$(expr "$(echo "$zsh_bindkey" | grep -m1 '\sbackward-kill-line$')" : '^"\(.*\)".*')"
else
return
fi
local pane_id="$1"
local pane_command="$2"
local full_command="$3"
if [ "$full_command" = ":" ]; then
# leading space prevents the command from being saved to history
# (assuming default HISTCONTROL settings)
local write_command=" $history_w '$(resurrect_history_file "$pane_id" "$pane_command")'"
local read_command=" $history_r '$(resurrect_history_file "$pane_id" "$pane_command")'"
# C-e C-u is a Bash shortcut sequence to clear whole line. It is necessary to
# delete any pending input so it does not interfere with our history command.
tmux send-keys -t "$pane_id" "$end_of_line" "$backward_kill_line" "$write_command" "$accept_line"
# Immediately restore after saving
tmux send-keys -t "$pane_id" "$end_of_line" "$backward_kill_line" "$read_command" "$accept_line"
fi
}
get_active_window_index() {
local session_name="$1"
tmux list-windows -t "$session_name" -F "#{window_flags} #{window_index}" |
awk '$1 ~ /\*/ { print $2; }'
}
get_alternate_window_index() {
local session_name="$1"
tmux list-windows -t "$session_name" -F "#{window_flags} #{window_index}" |
awk '$1 ~ /-/ { print $2; }'
}
dump_grouped_sessions() {
local current_session_group=""
local original_session
tmux list-sessions -F "$(grouped_sessions_format)" |
grep "^1" |
cut -c 3- |
sort |
while IFS=$d read session_group session_id session_name; do
if [ "$session_group" != "$current_session_group" ]; then
# this session is the original/first session in the group
original_session="$session_name"
current_session_group="$session_group"
else
# this session "points" to the original session
active_window_index="$(get_active_window_index "$session_name")"
alternate_window_index="$(get_alternate_window_index "$session_name")"
echo "grouped_session${d}${session_name}${d}${original_session}${d}:${alternate_window_index}${d}:${active_window_index}"
fi
done
}
fetch_and_dump_grouped_sessions(){
local grouped_sessions_dump="$(dump_grouped_sessions)"
get_grouped_sessions "$grouped_sessions_dump"
if [ -n "$grouped_sessions_dump" ]; then
echo "$grouped_sessions_dump"
fi
}
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# translates pane pid to process command running inside a pane
dump_panes() {
local full_command
dump_panes_raw |
while IFS=$d read line_type session_name window_number window_name window_active window_flags pane_index dir pane_active pane_command pane_pid history_size; do
# not saving panes from grouped sessions
if is_session_grouped "$session_name"; then
continue
fi
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full_command="$(pane_full_command $pane_pid)"
dir=$(echo $dir | sed 's/ /\\ /') # escape all spaces in directory path
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echo "${line_type}${d}${session_name}${d}${window_number}${d}${window_name}${d}${window_active}${d}${window_flags}${d}${pane_index}${d}${dir}${d}${pane_active}${d}${pane_command}${d}:${full_command}"
done
}
dump_windows() {
dump_windows_raw |
while IFS=$d read line_type session_name window_index window_active window_flags window_layout; do
# not saving windows from grouped sessions
if is_session_grouped "$session_name"; then
continue
fi
echo "${line_type}${d}${session_name}${d}${window_index}${d}${window_active}${d}${window_flags}${d}${window_layout}"
done
}
dump_state() {
tmux display-message -p "$(state_format)"
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}
dump_pane_contents() {
local pane_contents_area="$(get_tmux_option "$pane_contents_area_option" "$default_pane_contents_area")"
dump_panes_raw |
while IFS=$d read line_type session_name window_number window_name window_active window_flags pane_index dir pane_active pane_command pane_pid history_size; do
capture_pane_contents "${session_name}:${window_number}.${pane_index}" "$history_size" "$pane_contents_area"
done
}
dump_shell_history() {
dump_panes |
while IFS=$d read line_type session_name window_number window_name window_active window_flags pane_index dir pane_active pane_command full_command; do
save_shell_history "$session_name:$window_number.$pane_index" "$pane_command" "$full_command"
done
}
remove_old_backups() {
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# remove resurrect files older than 30 days, but keep at least 5 copies of backup.
local -a files
files=($(ls -t $(resurrect_dir)/${RESURRECT_FILE_PREFIX}_*.${RESURRECT_FILE_EXTENSION} | tail -n +6))
[[ ${#files[@]} -eq 0 ]] ||
find "${files[@]}" -type f -mtime +30 -exec rm -v "{}" \;
}
save_all() {
local resurrect_file_path="$(resurrect_file_path)"
local last_resurrect_file="$(last_resurrect_file)"
mkdir -p "$(resurrect_dir)"
fetch_and_dump_grouped_sessions > "$resurrect_file_path"
dump_panes >> "$resurrect_file_path"
dump_windows >> "$resurrect_file_path"
dump_state >> "$resurrect_file_path"
execute_hook "post-save-layout" "$resurrect_file_path"
if files_differ "$resurrect_file_path" "$last_resurrect_file"; then
ln -fs "$(basename "$resurrect_file_path")" "$last_resurrect_file"
else
rm "$resurrect_file_path"
fi
if capture_pane_contents_option_on; then
mkdir -p "$(pane_contents_dir "save")"
dump_pane_contents
pane_contents_create_archive
rm "$(pane_contents_dir "save")"/*
fi
if save_shell_history_option_on; then
dump_shell_history
fi
remove_old_backups
execute_hook "post-save-all"
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}
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show_output() {
[ "$SCRIPT_OUTPUT" != "quiet" ]
}
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main() {
if supported_tmux_version_ok; then
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if show_output; then
start_spinner "Saving..." "Tmux environment saved!"
fi
save_all
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if show_output; then
stop_spinner
display_message "Tmux environment saved!"
fi
fi
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}
main