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dotfiles/.local/bin/cron/mailsync

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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 "$USER not logged in; sync will not run."; exit ;}
# Run only if not already running in other instance
pgrep mbsync >/dev/null && { echo "mbsync is already running."; exit ;}
# First, we have to get the right variables for the mbsync file, the pass
# archive, notmuch and the GPG home. This is done by searching common profile
# files for variable assignments. This is ugly, but there are few options that
# will work on the maximum number of machines.
pkill -RTMIN+12 dwmblocks
eval "$(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)"
alias mbsync="mbsync -c $MBSYNCRC"
# Settings are different for MacOS (Darwin) systems.
case "$(uname)" in
Darwin)
notify() { osascript -e "display notification \"$2 in $1\" with title \"You've got Mail\" subtitle \"Account: $account\"" && sleep 2 ;}
;;
*)
case "$(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 "${XDG_CONFIG_HOME:-$HOME/.config}/mutt/.mailsynclastrun" 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 accounts
for account in $accounts; do
syncandnotify &
done
wait
notmuch new 2>/dev/null
#Create a touch file that indicates the time of the last run of mailsync
touch "${XDG_CONFIG_HOME:-$HOME/.config}/mutt/.mailsynclastrun"
pkill -RTMIN+12 dwmblocks