Finish script, ready for testing

Dockerfile

@@ -10,6 +10,8 @@ RUN apt-get update \
     && apt-get clean && rm -fr /var/lib/apt/lists/*
 
 RUN maildirmake /var/mail/working \
+    && mkdir /var/mail/working/landing \
+    && mkdir /var/mail/working/extracted \
     && echo "to /var/mail/working" > /root/.mailfilter
 RUN touch /var/mail/save-attachments.log
 

docker-entrypoint.sh

@@ -6,6 +6,8 @@ if [ -d /var/mail/working ]; then
 	chown -R root /var/mail/working
 else
 	maildirmake /var/mail/working
+	mkdir /var/mail/working/landing
+	mkdir /var/mail/working/extracted
 	echo "to /var/mail/working" > /root/.mailfilter
 fi
 

save-attachments.sh

@@ -1,6 +1,51 @@
 #!/bin/bash
-LOG=/dev/stderr
-echo "== $(date -Is) ==" >> $LOG
+MAILDIR=/var/mail/working
+DESTINATION=/output
+DEBUG=0
 
+echo "== $(date -Is) =="
+
+# retrieve
 fetchmail
 
+# shuffle around some files to the working directory
+mv $MAILDIR/new/* $MAILDIR/landing/
+cd $MAILDIR/landing/
+
+# process each message in a loop
+shopt -s nullglob
+for i in *
+do
+	echo "[$(date '+%T')] Backing up $i and processing..."
+	cp $i $MAILDIR/cur/
+	mkdir $MAILDIR/extracted/$i
+	mv $i $MAILDIR/extracted/$i/
+
+	munpack -C $MAILDIR/extracted/$i -q $MAILDIR/extracted/$i/$i
+
+	if [ -f /config/custom-handler ]; then
+		# allow custom handler script to do something here
+		exec /config/custom-handler "$MAILDIR/extracted/$i/"
+	fi
+
+	echo "[$(date '+%T')] Copying extracted attachments, if any..."
+	# need to extract date from email header
+	MSGTIMESTAMP=$(cat $MAILDIR/extracted/$i/$i | sed -n 's/^Date: *\([^\n]*\)/\1/p')
+	MSGDATE=$(date --date="$MSGTIMESTAMP" '+%F')
+	MSGTIME=$(date --date="$MSGTIMESTAMP" '+%H%M%S')
+	mkdir -p $DESTINATION/$MSGDATE/$MSGTIME
+	rm $MAILDIR/extracted/$i/$i
+	for z in $MAILDIR/extracted/$i/*
+	do
+		cp -v $z $DESTINATION/$MSGDATE/$MSGTIME/$(basename $z)
+		rm $z
+	done
+done
+
+shopt -u nullglob
+
+if [[ $DEBUG -eq 0 ]]; then
+	rm -fr $MAILDIR/extracted/$i/
+fi
+
+echo "[$(date '+%T')] Done!"