# $Id: mutt-message_cache_maildir.diff,v 1.3 2010/01/02 19:47:47 jcs Exp $
#
# a cheap hack to mutt to make it write its message cache files into a cur/
# subdirectory as well as making sure a new/ subdirectory exists so mutt will
# recognize it as a maildir mailbox.
#
# allows one to make a muttrc that overrides the spoolfile and folder
# variables, pointing them at the mutt message cache directory tree to read
# mail offline.
#
# see http://jcs.org/notaweblog/2008/09/29/making_mutt_useful_offline/
#
# by joshua stein <jcs@jcs.org>
#

--- bcache.c.orig	Mon Jan 26 20:40:54 2009
+++ bcache.c	Fri Jan  1 20:56:44 2010
@@ -25,6 +25,7 @@
 #include <errno.h>
 #include <dirent.h>
 #include <stdio.h>
+#include <libgen.h>
 
 #include "mutt.h"
 #include "account.h"
@@ -64,7 +65,7 @@
 
   dprint (3, (debugfile, "bcache_path: URL: '%s'\n", host));
 
-  len = snprintf (dst, dstlen-1, "%s/%s%s%s", MessageCachedir,
+  len = snprintf (dst, dstlen-1, "%s/%s%s%scur/", MessageCachedir,
 		  host, NONULL(mailbox),
 		  (mailbox && *mailbox &&
 		   mailbox[mutt_strlen(mailbox) - 1] == '/') ? "" : "/");
@@ -126,6 +127,7 @@
 FILE* mutt_bcache_put(body_cache_t *bcache, const char *id, int tmp)
 {
   char path[_POSIX_PATH_MAX];
+  char newpath[_POSIX_PATH_MAX];
   FILE* fp;
   char* s;
   struct stat sb;
@@ -153,6 +155,20 @@
     *s = '/';
     s = strchr (s + 1, '/');
   }
+
+  /* make sure new and tmp dirs exist in parent to be like real maildirs */
+  if (s = dirname(path)) {
+    s = dirname(s);
+
+    snprintf (newpath, sizeof (newpath), "%s/new", s);
+    if (stat (newpath, &sb) < 0 && (errno != ENOENT || mkdir (newpath, 0777) < 0))
+      return NULL;
+
+    snprintf (newpath, sizeof (newpath), "%s/tmp", s);
+    if (stat (newpath, &sb) < 0 && (errno != ENOENT || mkdir (newpath, 0777) < 0))
+      return NULL;
+  } else
+    return NULL;
 
   out:
   dprint (3, (debugfile, "bcache: put: '%s'\n", path));