First version of muxtab

Author: nowathom

muxtab.tmux

@@ -1 +1,12 @@
 #!/bin/sh
+
+# shellcheck source-path=SCRIPTDIR/src
+CURRENT_DIR=$(dirname "$(readlink -f "$0")")
+SCRIPTS_PATH="$CURRENT_DIR/src"
+. "$SCRIPTS_PATH/helpers.sh"
+
+timer="#($SCRIPTS_PATH/timer.sh)"
+
+set_tmux_option "@muxtab_file" "$HOME/.muxtab"
+
+set_tmux_option "status-left" "$timer$(get_tmux_option "status-left" "")"

src/helpers.sh

@@ -0,0 +1,56 @@
+#!/bin/sh
+
+# Copyright (C) Bruno Sutic
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+# DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+# OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+# Source: https://github.com/tmux-plugins/tmux-continuum/
+#
+# Modifications:
+# - compatitibility with POSIX sh
+
+get_tmux_option() {
+	option="$1"
+	default_value="$2"
+	option_value=$(tmux show-option -gqv "$option")
+	if [ -z "$option_value" ]; then
+		echo "$default_value"
+	else
+		echo "$option_value"
+	fi
+}
+
+set_tmux_option() {
+	option="$1"
+	value="$2"
+	tmux set-option -gq "$option" "$value"
+}
+
+# multiple tmux server detection helpers
+
+current_tmux_server_pid() {
+	echo "$TMUX" |
+		cut -f2 -d","
+}
+
+all_tmux_processes() {
+	# ignores `tmux source-file .tmux.conf` command used to reload tmux.conf
+	user_id=$(id -u)
+	ps -u "$user_id" -o "command pid" "^tmux" -v "^tmux source"
+}

src/timer.sh

@@ -0,0 +1,66 @@
+#!/bin/sh
+
+# shellcheck source-path=SCRIPTDIR
+CURRENT_DIR=$(dirname "$(readlink -f "$0")")
+SCRIPTS_PATH="$CURRENT_DIR"
+. "$SCRIPTS_PATH/helpers.sh"
+
+LOCKFILE="/tmp/muxtab.timer.lock"
+
+main() {
+	if [ -e ${LOCKFILE} ] && kill -0 "$(cat ${LOCKFILE})" 2>/dev/null; then
+		# another timer is running
+		exit 0
+	fi
+
+	trap 'rm -f ${LOCKFILE}; exit 0' INT TERM EXIT
+	echo $$ >${LOCKFILE}
+
+	current_time=$(date +%s)
+
+	muxtab_file=$(get_tmux_option "@muxtab_file" "$HOME/.muxtab")
+
+	if [ ! -e "$muxtab_file" ]; then
+		# no muxtab file found
+		exit 0
+	fi
+
+	# loop through the muxtab file
+	while read -r line; do
+		# remove leading whitespaces
+		cleaned_line=$(echo "$line" | sed -e 's/^[[:space:]]*//')
+		# skip empty lines
+		if [ -z "$cleaned_line" ]; then
+			continue
+		fi
+
+		# skip comments
+		case "$cleaned_line" in
+		\#*) continue ;;
+		esac
+
+		# split line into interval and command
+		set -- "$cleaned_line"
+		interval=$(echo "$cleaned_line" | awk '{print $1}')
+		command=$(echo "$cleaned_line" | awk '{$1=""; print $0}' | sed -e 's/^[[:space:]]*//')
+
+		# check if the command is due to be run
+		hash=$(echo "$command" | sha256sum | cut -d' ' -f1)
+		if [ -e "/tmp/muxtab.timer.$hash" ]; then
+			last_time=$(cat "/tmp/muxtab.timer.$hash")
+			if [ $((last_time + interval)) -gt "$current_time" ]; then
+				# not due yet
+				continue
+			fi
+		fi
+
+		# run command
+		echo "$current_time" >"/tmp/muxtab.timer.$hash"
+		eval "$command" &
+
+	done <"$muxtab_file"
+
+	rm -f ${LOCKFILE}
+}
+
+main