From 6211ed741ea97719a96da6d6db8aed39f4fd05e9 Mon Sep 17 00:00:00 2001
From: Michael Orlitzky <michael@orlitzky.com>
Date: Thu, 29 Oct 2015 22:53:26 -0400
Subject: [PATCH] Get DovecotMv just barely working.

---
 lib/mv/plugins/dovecot.rb | 37 +++++++++++++++++++++++++++++--------
 1 file changed, 29 insertions(+), 8 deletions(-)

diff --git a/lib/mv/plugins/dovecot.rb b/lib/mv/plugins/dovecot.rb
index b1dc598..9cdfc36 100644
--- a/lib/mv/plugins/dovecot.rb
+++ b/lib/mv/plugins/dovecot.rb
@@ -1,3 +1,5 @@
+require 'fileutils'
+
 require 'common/filesystem'
 require 'common/dovecot_plugin'
 require 'mv/mv_plugin'
@@ -7,16 +9,35 @@ class DovecotMv
   include DovecotPlugin
   include MvPlugin
 
+  def mv_user(user_from, user_to)
+    # Move the user's mail directory from one domain (that should
+    # exist) to another domain (that should exist).
+    #
+    # This is actually a little subtle, because none of the
+    # directories in question have to exist. If I create two new
+    # domains in postfixadmin and one mailbox but never deliver any
+    # mail, it should be possible to move the mailbox to the other
+    # domain. No directories will exist until mail is delivered,
+    # though.
 
-  def mv_domain(from, to)
-    from_path = self.get_domain_path(from)
-    to_path = self.get_domain_path(to)
-    FileUtils.mv(from_path, to_path)
-  end
+    # get_user_path() will fail if there's no mailbox to move. It will
+    # also fail on an invalid user -- oh well!
+    begin
+      from_path = self.get_user_path(user_from)
+    rescue NonexistentUserError
+      # Do nothing, there's no source mailbox...
+      return
+    end
+
+    # We may need to create the target domain directory, even if the
+    # domain exists in the database.
+    domain_to = user_to.split('@')[1]
+    domain_dir = self.get_domain_path(domain_to)
+    FileUtils.mkdir_p(domain_dir)
 
-  def mv_user(from, to)
-    from_path = self.get_user_path(from)
-    to_path = self.get_user_path(to)
+    # The from_path exists or else we would have returned earlier. The
+    # parent of to_path exists because we just created it.
+    to_path = self.get_user_path(user_to, false)
     FileUtils.mv(from_path, to_path)
   end
 
-- 
2.43.2