1

1 files changed, 112 insertions, 7 deletions

diff --git a/scripts/.local/bin/mailsync b/scripts/.local/bin/mailsync
index cb00bb7..9805a54 100755
--- a/scripts/.local/bin/mailsync
+++ b/scripts/.local/bin/mailsync
@@ -1,13 +1,118 @@
 #!/bin/sh
 
-MBSYNC=$(pgrep mbsync)
+# - 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.
 
-if [ -n "$MBSYNC" ]; then
-    echo "Already running one instance of mbsync or notmuch. Exiting..."
-    exit 0
+# There are many arbitrary and ugly features in this script because it is
+# inherently difficult to pass environmental variables to cronjobs and other
+# issues. It also should at least be compatible with Linux (and maybe BSD) with
+# Xorg and MacOS as well.
+
+# Run only if not already running in other instance
+pgrep mbsync >/dev/null && { echo "mbsync is already running."; exit ;}
+
+# First, we have to get the right variables for the mbsync file, the pass
+# archive, notmuch and the GPG home.  This is done by searching common profile
+# files for variable assignments. This is ugly, but there are few options that
+# will work on the maximum number of machines.
+eval "$(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 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="${XDG_CACHE_HOME:-$HOME/.cache}/.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 "$2" ;;
+	esac
+	new=$(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
+		$((newcount > 5)) )
+			# this echo will end up in the local spool
+			#echo "$newcount new mail for $2."
+			[ -z "$MAILSYNC_MUTE" ] && notify "$newcount new mail(s) in \`$2\` account."
+			;;
+		$((newcount > 0)) )
+			# this echo will end up in the local spool
+			#echo "$newcount new mail for $2."
+			[ -z "$MAILSYNC_MUTE" ] &&
+			for file in $new; do
+		    		# Extract and decode subject and sender from mail.
+				subject="$(sed -n "/^Subject:/ s|Subject: *|| p" "$file" |
+					perl -CS -MEncode -ne 'print decode("MIME-Header", $_)')"
+				from="$(sed -n "/^From:/ s|From: *|| p" "$file" |
+					perl -CS -MEncode -ne 'print decode("MIME-Header", $_)')"
+				from="${from% *}" ; from="${from%\"}" ; from="${from#\"}"
+				notify "Email from $from:" "$subject"
+			done
+			;;
+		# this echo will end up in the local spool
+		#*) 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
 
-mbsync -c "$XDG_CONFIG_HOME/mbsync/config" -a
+for account in $tosync; do
+	case $account in
+		Channel*) syncandnotify imap "${account##* }" & ;;
+		account*) syncandnotify pop "${account##* }" & ;;
+		error*) echo "ERROR: Account ${account##* } not found." ;;
+	esac
+done
+
+wait
+
+# notmuch new --quiet
 
-printf "%s " "Press enter to continue"
-read
+#Create a touch file that indicates the time of the last run of mailsync
+touch "$lastrun"