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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 user logged in (prevent cron errors)
pgrep -u "${USER:=$LOGNAME}" >/dev/null || { echo "$USER not logged in; sync will not run."; exit ;}
# Run only if not already running in other instance
pgrep -x mbsync >/dev/null && { echo "mbsync is already running." ; exit ;}
# First, we have to get the right variables for the mbsync file, the pass
# archive, notmuch and the GPG home. This is done by searching common profile
# files for variable assignments. This is ugly, but there are few options that
# will work on the maximum number of machines.
eval "$(grep -h -- \
"^\s*\(export \)\?\(MBSYNCRC\|PASSWORD_STORE_DIR\|NOTMUCH_CONFIG\|GNUPGHOME\)=" \
"$HOME/.profile" "$HOME/.bash_profile" "$HOME/.zprofile" "$HOME/.bashrc" "$HOME/.zshrc" "$HOME/.pam_environment" 2>/dev/null)"
# One alternative to this kind of command would be marking the script for
# /bin/sh -l. That might cause other problems on other particular setups that
# do more complicated things on login, or those people who assign environmental
# variables in shell rc files.
case "$(readlink -f /sbin/init)" in
*systemd*) export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$(id -u)/bus ;;
esac
export GPG_TTY=$TTY
[ -n "$MBSYNCRC" ] && alias mbsync="mbsync -c $MBSYNCRC" || MBSYNCRC="$HOME/.mbsyncrc"
# 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 ;}
messageinfo() { osascript -e "display notification with title \"📧 $from\" subtitle \"$subject\"" ;}
;;
*)
displays="$(ps axo user,cmd | grep "^$USER\s\+.*Xorg" | grep -wo "[0-9]*:[0-9]\+")"
notify() { for x in $displays; do
export DISPLAY=$x
notify-send --app-name="mutt-wizard" "mutt-wizard" "📬 $2 new mail(s) in \`$1\` account."
done ;}
messageinfo() { for x in $displays; do
export DISPLAY=$x
notify-send --app-name="mutt-wizard" "📧$from:" "$subject"
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/$acc/inbox/new/" -type f -newer "$HOME/.config/mutt/.mailsynclastrun" 2> /dev/null)
newcount=$(echo "$new" | sed '/^\s*$/d' | wc -l)
if [ "$newcount" -gt "0" ]; then
notify "$acc" "$newcount" &
for file in $new; do
# Extract subject and sender from mail.
from=$(awk '/^From: / && ++n ==1,/^\<.*\>:/' "$file" | perl -CS -MEncode -ne 'print decode("MIME-Header", $_)' | awk '{ $1=""; if (NF>=3)$NF=""; print $0 }' | sed 's/^[[:blank:]]*[\"'\''\<]*//;s/[\"'\''\>]*[[:blank:]]*$//')
subject=$(awk '/^Subject: / && ++n == 1,/^\<.*\>: / && ++i == 2' "$file" | head -n 1 | perl -CS -MEncode -ne 'print decode("MIME-Header", $_)' | sed 's/^Subject: //' | sed 's/^{[[:blank:]]*[\"'\''\<]*//;s/[\"'\''\>]*[[:blank:]]*$//' | tr -d '\n')
messageinfo &
done
fi
}
# 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=$*
fi
#( kill -46 "$(pidof "${STATUSBAR:-dwmblocks}")" >/dev/null 2>&1 ) 2>/dev/null
# Parallelize multiple accounts
for account in $accounts
do
syncandnotify &
done
wait
#( kill -46 "$(pidof "${STATUSBAR:-dwmblocks}")" >/dev/null 2>&1 ) 2>/dev/null
notmuch new 2>/dev/null
#Create a touch file that indicates the time of the last run of mailsync
touch "$HOME/.config/mutt/.mailsynclastrun"
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