On Sat, 2007-05-05 at 14:48 +0100, Adrian Barker wrote: > That's right: we cannot change the way that we deliver email, at least > in the short to medium term, so need to maintain compatibility with the > UW IMAP server. If we do decide to write a plugin that copies new email > from the mail spool to the IMAP inbox, is there any documentation on how > to write plugins ? I could not find any on the wiki.
There's currently no documentation for them. You could look at mail-log plugin or quota plugin for an example. In any case what you'd want to do is hook into sync_init() and do the moving there before calling the parent sync_init(). There are two ways to do this: a) Dummy copying to ~/mbox. This is slower because then Dovecot needs to reread the new messages from ~/mbox and write X-UID etc. headers. b) Open /var/mail/user as read-only mailbox with in-memory indexes. You'll need to temporarily add MAIL_STORAGE_FLAG_FULL_FS_ACCESS to storage->flags so that you can open the mailbox. Then use mailbox_copy() to copy them to ~/mbox. In both cases after copying is successful, truncate the /var/mail/user. If something went wrong... well, you should probably at least try to not leave duplicate mails lying there. With b) option it's easy with mailbox_transaction_rollback(). See lib-storage/mail-storage.h and lib-storage/mail-storage-private.h
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