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#!/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 not already running in other instance
pgrep 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*\(export \)\?\(MBSYNCRC\|MPOPRC\|PASSWORD_STORE_DIR\|PASSWORD_STORE_GPG_OPTS\|NOTMUCH_CONFIG\|GNUPGHOME\|MAILSYNC_MUTE\|XDG_CONFIG_HOME\|XDG_DATA_HOME\)=" \
"$HOME/.profile" "$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)"
# For non-interactive shell (e.g. cron job) run only when the GPG key (in $GNUPGHOME or pass --homedir) is unlocked
tty -s || (echo "dummy" | gpg --sign --batch --pinentry-mode error -o /dev/null > /dev/null 2>&1) || exit
export GPG_TTY="$(tty)"
[ -n "$MBSYNCRC" ] && alias mbsync="mbsync -c $MBSYNCRC" || MBSYNCRC="$HOME/.mbsyncrc"
[ -n "$MPOPRC" ] || MPOPRC="$HOME/.config/mpop/config"
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\" with title \"$1\"" ;} ;;
*)
case "$(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 -ax X\(\|org\|wayland\))"
displays="$(echo "$pgrepoutput" | grep -wo "[0-9]*:[0-9]\+" | sort -u)"
[ -z "$displays" ] && [ -d /tmp/.X11-unix ] && displays=$(cd /tmp/.X11-unix && for x in X*; do echo ":${x#X}"; done)
notify() { [ -n "$pgrepoutput" ] && for x in ${displays:-:0}; do
export DISPLAY="$x"
notify-send --app-name="mutt-wizard" -- "$1" "$2"
done ;}
;;
esac
# Check account for new mail. Notify if there is new content.
syncandnotify() {
case "$1" in
imap) mbsync -q "$2" ;;
pop) mpop -q "$2" ;;
esac || return 1
new=$(find\
"$HOME/.local/share/mail/$2/"[Ii][Nn][Bb][Oo][Xx]/new/ \
"$HOME/.local/share/mail/$2/"[Ii][Nn][Bb][Oo][Xx]/cur/ \
-type f -newer "$lastrun" 2> /dev/null)
newcount=$(echo "$new" | sed '/^\s*$/d' | wc -l)
case 1 in
$((newcount > 5)) )
echo "$newcount new mails for $2." >/dev/tty
[ -z "$MAILSYNC_MUTE" ] && notify "New Mail!" "📬 $newcount new mails in \`$2\` account."
;;
$((newcount > 0)) )
echo "$newcount new mail(s) for $2." >/dev/tty
[ -z "$MAILSYNC_MUTE" ] &&
for file in $new; do
# Extract and decode subject and sender from mail.
subject=$(awk '/^Subject: / && ++n == 1,/^.*: / && ++i == 2' "$file" | head -n-1 |
perl -CS -MEncode -ne 'print decode("MIME-Header", $_)' |
sed 's/^Subject: //' | tr -d '\n\t')
from="$(sed -n "/^From:/ s|From: *|| p" "$file" |
perl -CS -MEncode -ne 'print decode("MIME-Header", $_)')"
from="${from% *}" ; from="${from%\"}" ; from="${from#\"}"
notify "📧$from:" "$subject"
done
;;
*) echo "No new mail for $2." ;;
esac
}
allaccounts="$(grep -hs "^\(Channel\|account\)" "$MBSYNCRC" "$MPOPRC")"
# Get accounts to sync. All if no argument. Prefix with `error` if non-existent.
IFS='
'
if [ -z "$1" ]; then
tosync="$allaccounts"
else
tosync="$(for arg in "$@"; do for availacc in $allaccounts; do
[ "$arg" = "${availacc##* }" ] && echo "$availacc" && break
done || echo "error $arg"; done)"
fi
pids= # PIDs of backgrounded subshells
count=0 # number of accounts in $tosync
failed=0 # number of failed sync attempts
for account in $tosync; do
count=$((count+1))
case $account in
Channel*)
syncandnotify imap "${account##* }" &
pids="$pids $!"
;;
account*)
syncandnotify pop "${account##* }" &
pids="$pids $!"
;;
error*)
echo "ERROR: Account ${account##* } not found."
failed=$((failed+1))
;;
esac
done
IFS=' '
for pid in $pids; do
wait $pid || failed=$((failed+1))
done
# Abort if no account sync succeeded
[ "$count" -gt "$failed" ] || exit 1
notmuch new --quiet
#Create a touch file that indicates the time of the last run of mailsync
touch "$lastrun"
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