Mutt: Support message caching with purging

.mutt/cachepurge.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+## Purge old message in Mutt's message cache.
+## This is intended to be run at startup, but can be run manually anytime.
+## It should not output anything to stdout.
+
+## In KB.
+CACHE_LIMIT=51200
+
+cd ~/.cache/mutt_msg 2>/dev/null
+[ $? -ne 0 ] && exit
+
+[ $(du -s . | cut -f1 -d'	') -lt $CACHE_LIMIT ] && exit
+while IFS= read -r i; do
+	rm "$i"
+	[ $(du -s . | cut -f1 -d'	') -lt $CACHE_LIMIT ] && exit
+done <<EOF
+$(ls -rt $(find . -type f))
+EOF

.mutt/muttrc

@@ -30,6 +30,8 @@ source "~/.mutt/maileditor.sh|"
 ## folder is specified, it is even faster. If no folder exists, the cache will
 ## be a single file.
 set header_cache = "~/.cache/mutt"
+set message_cachedir = "~/.cache/mutt_msg"
+source "~/.mutt/cachepurge.sh|"
 
 ## Tell Mutt to check all IMAP folders. This will add all of them to the
 ## sidebar. Contrary to the manu 'mailboxes' way, order cannot be controlled, so

.scripts/homeinit

@@ -20,7 +20,7 @@ fi
 if command -v mutt >/dev/null 2>&1; then
 	echo "==> Mutt"
 	[ -d "$SOURCEDIR" ] && ln -snf "$SOURCEDIR/mails" "$HOME/.mutt.d"
-	mkdir -p "$HOME/.cache/mutt/hcache"
+	mkdir -p "$HOME/.cache/mutt/"
 	echo
 fi