Add mblaze maildir archiving script

bin/mailarchive

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+if [ -z "$2" ]; then
+    >&2 echo "Usage: $0 <source maildir> <archive maildir>"
+    exit 1
+fi
+
+src="$1"
+arch="$2"
+begin="2010"
+
+if ! [ -d "$arch/cur" ]; then
+    >&2 echo "Folder $arch does not appear to be a maildir"
+    exit 1
+fi
+
+umask 700
+
+for y in $(seq "$begin" "$(date '+%Y')" | sort -r); do
+    mkdir -p "$arch/$y/cur" "$arch/$y/new" "$arch/$y/tmp"
+    mails=$(mlist "$src" | mpick -t "date <= \"$y-12-31\" && date >= \"$y-01-01\" && date < \"-180d\"" 2> /dev/null)
+    >&2 printf 'The year is %s. %s emails to sort\n' "$y" "$(echo "$mails" | wc -l)"
+    echo "$mails" | mrefile "$arch/$y"
+done