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tmux-resurrect/scripts/restore.sh

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#!/usr/bin/env bash
CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
source "$CURRENT_DIR/variables.sh"
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source "$CURRENT_DIR/helpers.sh"
source "$CURRENT_DIR/process_restore_helpers.sh"
source "$CURRENT_DIR/spinner_helpers.sh"
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# delimiter
d=$'\t'
# Global variable.
# Used during the restore: if a pane already exists from before, it is
# saved in the array in this variable. Later, process running in existing pane
# is also not restored. That makes the restoration process more idempotent.
EXISTING_PANES_VAR=""
RESTORING_FROM_SCRATCH="false"
is_line_type() {
local line_type="$1"
local line="$2"
echo "$line" |
\grep -q "^$line_type"
}
check_saved_session_exists() {
local resurrect_file="$(last_resurrect_file)"
if [ ! -f $resurrect_file ]; then
display_message "Tmux resurrect file not found!"
return 1
fi
}
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pane_exists() {
local session_name="$1"
local window_number="$2"
local pane_index="$3"
tmux list-panes -t "${session_name}:${window_number}" -F "#{pane_index}" 2>/dev/null |
\grep -q "^$pane_index$"
}
register_existing_pane() {
local session_name="$1"
local window_number="$2"
local pane_index="$3"
local pane_custom_id="${session_name}:${window_number}:${pane_index}"
local delimiter=$'\t'
EXISTING_PANES_VAR="${EXISTING_PANES_VAR}${delimiter}${pane_custom_id}"
}
is_pane_registered_as_existing() {
local session_name="$1"
local window_number="$2"
local pane_index="$3"
local pane_custom_id="${session_name}:${window_number}:${pane_index}"
[[ "$EXISTING_PANES_VAR" =~ "$pane_custom_id" ]]
}
restore_from_scratch_true() {
RESTORING_FROM_SCRATCH="true"
}
is_restoring_from_scratch() {
[ "$RESTORING_FROM_SCRATCH" == "true" ]
}
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window_exists() {
local session_name="$1"
local window_number="$2"
tmux list-windows -t "$session_name" -F "#{window_index}" 2>/dev/null |
\grep -q "^$window_number$"
}
session_exists() {
local session_name="$1"
tmux has-session -t "$session_name" 2>/dev/null
}
first_window_num() {
tmux show -gv base-index
}
tmux_socket() {
echo $TMUX | cut -d',' -f1
}
new_window() {
local session_name="$1"
local window_number="$2"
local window_name="$3"
local dir="$4"
tmux new-window -d -t "${session_name}:${window_number}" -n "$window_name" -c "$dir"
}
new_session() {
local session_name="$1"
local window_number="$2"
local window_name="$3"
local dir="$4"
TMUX="" tmux -S "$(tmux_socket)" new-session -d -s "$session_name" -n "$window_name" -c "$dir"
# change first window number if necessary
local created_window_num="$(first_window_num)"
if [ $created_window_num -ne $window_number ]; then
tmux move-window -s "${session_name}:${created_window_num}" -t "${session_name}:${window_number}"
fi
}
new_pane() {
local session_name="$1"
local window_number="$2"
local window_name="$3"
local dir="$4"
tmux split-window -t "${session_name}:${window_number}" -c "$dir"
# minimize window so more panes can fit
tmux resize-pane -t "${session_name}:${window_number}" -U "999"
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}
restore_pane() {
local pane="$1"
while IFS=$d read line_type session_name window_number window_name window_active window_flags pane_index dir pane_active pane_command pane_full_command; do
dir="$(remove_first_char "$dir")"
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window_name="$(remove_first_char "$window_name")"
pane_full_command="$(remove_first_char "$pane_full_command")"
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if pane_exists "$session_name" "$window_number" "$pane_index"; then
if is_restoring_from_scratch; then
# overwrite the pane
# happens only for the first pane if it's the only registered pane for the whole tmux server
local pane_id="$(tmux display-message -p -F "#{pane_id}" -t "$session_name:$window_number")"
new_pane "$session_name" "$window_number" "$window_name" "$dir"
tmux kill-pane -t "$pane_id"
else
# Pane exists, no need to create it!
# Pane existence is registered. Later, its process also won't be restored.
register_existing_pane "$session_name" "$window_number" "$pane_index"
fi
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elif window_exists "$session_name" "$window_number"; then
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new_pane "$session_name" "$window_number" "$window_name" "$dir"
elif session_exists "$session_name"; then
new_window "$session_name" "$window_number" "$window_name" "$dir"
else
new_session "$session_name" "$window_number" "$window_name" "$dir"
fi
done < <(echo "$pane")
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}
restore_state() {
local state="$1"
echo "$state" |
while IFS=$d read line_type client_session client_last_session; do
tmux switch-client -t "$client_last_session"
tmux switch-client -t "$client_session"
done
}
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restore_grouped_session() {
local grouped_session="$1"
echo "$grouped_session" |
while IFS=$d read line_type grouped_session original_session alternate_window active_window; do
TMUX="" tmux -S "$(tmux_socket)" new-session -d -s "$grouped_session" -t "$original_session"
done
}
restore_active_and_alternate_windows_for_grouped_sessions() {
local grouped_session="$1"
echo "$grouped_session" |
while IFS=$d read line_type grouped_session original_session alternate_window_index active_window_index; do
alternate_window_index="$(remove_first_char "$alternate_window_index")"
active_window_index="$(remove_first_char "$active_window_index")"
if [ -n "$alternate_window_index" ]; then
tmux switch-client -t "${grouped_session}:${alternate_window_index}"
fi
if [ -n "$active_window_index" ]; then
tmux switch-client -t "${grouped_session}:${active_window_index}"
fi
done
}
never_ever_overwrite() {
local overwrite_option_value="$(get_tmux_option "$overwrite_option" "")"
[ -n "$overwrite_option_value" ]
}
detect_if_restoring_from_scratch() {
if never_ever_overwrite; then
return
fi
local total_number_of_panes="$(tmux list-panes -a | wc -l | sed 's/ //g')"
if [ "$total_number_of_panes" -eq 1 ]; then
restore_from_scratch_true
fi
}
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# functions called from main (ordered)
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restore_all_panes() {
detect_if_restoring_from_scratch
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while read line; do
if is_line_type "pane" "$line"; then
restore_pane "$line"
fi
done < $(last_resurrect_file)
}
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restore_pane_layout_for_each_window() {
\grep '^window' $(last_resurrect_file) |
while IFS=$d read line_type session_name window_number window_active window_flags window_layout; do
tmux select-layout -t "${session_name}:${window_number}" "$window_layout"
done
}
restore_shell_history() {
awk 'BEGIN { FS="\t"; OFS="\t" } /^pane/ { print $2, $3, $7, $10; }' $(last_resurrect_file) |
while IFS=$d read session_name window_number pane_index pane_command; do
if ! is_pane_registered_as_existing "$session_name" "$window_number" "$pane_index"; then
if [ "$pane_command" = "bash" ]; then
local pane_id="$session_name:$window_number.$pane_index"
# tmux send-keys has -R option that should reset the terminal.
# However, appending 'clear' to the command seems to work more reliably.
local read_command="history -r '$(resurrect_history_file "$pane_id")'; clear"
tmux send-keys -t "$pane_id" "$read_command" C-m
fi
fi
done
}
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restore_all_pane_processes() {
if restore_pane_processes_enabled; then
local pane_full_command
awk 'BEGIN { FS="\t"; OFS="\t" } /^pane/ && $11 !~ "^:$" { print $2, $3, $7, $8, $11; }' $(last_resurrect_file) |
while IFS=$d read session_name window_number pane_index dir pane_full_command; do
dir="$(remove_first_char "$dir")"
pane_full_command="$(remove_first_char "$pane_full_command")"
restore_pane_process "$pane_full_command" "$session_name" "$window_number" "$pane_index" "$dir"
done
fi
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}
restore_active_pane_for_each_window() {
awk 'BEGIN { FS="\t"; OFS="\t" } /^pane/ && $9 == 1 { print $2, $3, $7; }' $(last_resurrect_file) |
while IFS=$d read session_name window_number active_pane; do
tmux switch-client -t "${session_name}:${window_number}"
tmux select-pane -t "$active_pane"
done
}
restore_zoomed_windows() {
awk 'BEGIN { FS="\t"; OFS="\t" } /^pane/ && $6 ~ /Z/ && $9 == 1 { print $2, $3; }' $(last_resurrect_file) |
while IFS=$d read session_name window_number; do
tmux resize-pane -t "${session_name}:${window_number}" -Z
done
}
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restore_grouped_sessions() {
while read line; do
if is_line_type "grouped_session" "$line"; then
restore_grouped_session "$line"
restore_active_and_alternate_windows_for_grouped_sessions "$line"
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fi
done < $(last_resurrect_file)
}
restore_active_and_alternate_windows() {
awk 'BEGIN { FS="\t"; OFS="\t" } /^window/ && $5 ~ /[*-]/ { print $2, $4, $3; }' $(last_resurrect_file) |
sort -u |
while IFS=$d read session_name active_window window_number; do
tmux switch-client -t "${session_name}:${window_number}"
done
}
restore_active_and_alternate_sessions() {
while read line; do
if is_line_type "state" "$line"; then
restore_state "$line"
fi
done < $(last_resurrect_file)
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}
main() {
if supported_tmux_version_ok && check_saved_session_exists; then
start_spinner "Restoring..." "Tmux restore complete!"
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restore_all_panes
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restore_pane_layout_for_each_window >/dev/null 2>&1
if save_bash_history_option_on; then
restore_shell_history
fi
restore_all_pane_processes
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# below functions restore exact cursor positions
restore_active_pane_for_each_window
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restore_zoomed_windows
restore_grouped_sessions # also restores active and alt windows for grouped sessions
restore_active_and_alternate_windows
restore_active_and_alternate_sessions
stop_spinner
display_message "Tmux restore complete!"
fi
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}
main