#!/bin/sh # - Syncs mail for all accounts, or a single account given as an argument.# - Displays a notification showing the number of new mails.# - Displays a notification for each new mail with its subject displayed.# - Runs notmuch to index new mail.# - This script can be set up as a cron job for automated mail syncing. # There are many arbitrary and ugly features in this script because it is# inherently difficult to pass environmental variables to cronjobs and other# issues. It also should at least be compatible with Linux (and maybe BSD) with# Xorg and MacOS as well. # Run only if user logged in (prevent cron errors)pgrep -u "${USER:=$LOGNAME}" >/dev/null || { echo "$USER not logged in; sync will not run."; exit ;}# Run only if not already running in other instancepgrep mbsync >/dev/null && { echo "mbsync is already running."; exit ;} # First, we have to get the right variables for the mbsync file, the pass# archive, notmuch and the GPG home.  This is done by searching common profile# files for variable assignments. This is ugly, but there are few options that# will work on the maximum number of machines.eval "$(grep -h -- \	"^\s*\(export \)\?\(MBSYNCRC\|PASSWORD_STORE_DIR\|NOTMUCH_CONFIG\|GNUPGHOME\)=" \	"$HOME/.profile" "$HOME/.bash_profile" "$HOME/.zprofile"  "$HOME/.config/zsh/.zprofile" "$HOME/.zshenv" \	"$HOME/.config/zsh/.zshenv" "$HOME/.bashrc" "$HOME/.zshrc" "$HOME/.config/zsh/.zshrc" \	"$HOME/.pam_environment" 2>/dev/null)" export GPG_TTY="$(tty)" [ -n "$MBSYNCRC" ] && alias mbsync="mbsync -c $MBSYNCRC" || MBSYNCRC="$HOME/.mbsyncrc" lastrun="${XDG_CONFIG_HOME:-$HOME/.config}/mutt/.mailsynclastrun" # Settings are different for MacOS (Darwin) systems.case "$(uname)" in	Darwin)		notify() { osascript -e "display notification \"$2 in $1\" with title \"You've got Mail\" subtitle \"Account: $account\"" && sleep 2 ;}		;;	*)		case "$(readlink -f /sbin/init)" in			*systemd*|*openrc*) export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$(id -u)/bus ;;		esac		# remember if a display server is running since `ps` doesn't always contain a display		pgrepoutput="$(pgrep -a X\(org\|wayland\))"		displays="$(echo "$pgrepoutput" | grep -wo "[0-9]*:[0-9]\+" | sort -u)"		notify() { [ -n "$pgrepoutput" ] && for x in ${displays:-0:}; do				export DISPLAY=$x				notify-send --app-name="mutt-wizard" "New mail!" "📬 $2 new mail(s) in \`$1\` account."			done ;}		;;esac # Check account for new mail. Notify if there is new content.syncandnotify() {    acc="$(echo "$account" | sed "s/.*\///")"    if [ -z "$opts" ]; then mbsync "$acc"; else mbsync "$opts" "$acc"; fi    new=$(find\	"$HOME/.local/share/mail/$acc/INBOX/new/"\	"$HOME/.local/share/mail/$acc/Inbox/new/"\	"$HOME/.local/share/mail/$acc/inbox/new/"\	"$HOME/.local/share/mail/$acc/INBOX/cur/"\	"$HOME/.local/share/mail/$acc/Inbox/cur/"\	"$HOME/.local/share/mail/$acc/inbox/cur/"\	-type f -newer "$lastrun" 2> /dev/null)    newcount=$(echo "$new" | sed '/^\s*$/d' | wc -l)    case 1 in	$((newcount > 0)) ) notify "$acc" "$newcount" ;;    esac} # Sync accounts passed as argument or all.if [ "$#" -eq "0" ]; then    accounts="$(awk '/^Channel/ {print $2}' "$MBSYNCRC")"else    for arg in "$@"; do        [ "${arg%${arg#?}}" = '-' ] && opts="${opts:+${opts} }${arg}" && shift 1    done    accounts=$*fi # Parallelize multiple accountsfor account in $accounts; do    syncandnotify &done wait notmuch new 2>/dev/null #Create a touch file that indicates the time of the last run of mailsynctouch "$lastrun"