Correction: The :unread label of spam mails has to be removed after 
copyingl. Why? If you remove :unread, the mail file is moved from the /new 
directory and not found any more. My working function looks like this:

class Redwood::InboxMode
  def label_spamassassin_spam
    thread = cursor_thread or return
    spamassassin_maildir_path = "/home/rob/Maildir/SpamAssassin/Spam/cur/"
    message_file = File.join(
      thread.latest_message.source.file_path,
      thread.latest_message.source_info.to_s)
    FileUtils.cp(message_file, spamassassin_maildir_path)
    BufferManager.flash "Copied to SpamAssassin Spam file: #{File.basename 
message_file}"
    toggle_spam
    thread.remove_label :unread
    flush_index
  end
end


Best, Robert


On Friday, 10 July 2020 16:58:16 UTC-5, Robert Winkler wrote:
>
> Thanks for all the useful code, Iain.
>
> Here the final solution. Explication: Spam (= 'undesired') messages and 
> Ham (= 'desired') messages are copied into separate Maildir folders. 
> Those are synchronized with an IMAP server (using OfflineImap) for 
> training a SpamAssassin filter (running daily on a server, using CRON):
> The last message of a thread is chosen by 's' (Spam) or 'h' (Ham) in the 
> Inbox or Search Results Mode (e.g. in the display of unread messages).
> Spam messages are removed from the Inbox listing. Ham messages get a label 
> 'ham' which indicates that the message was already sent to training.
> The SpamAssassin folders are not observed by sup. Mails older than 5 days 
> are automatically deleted by (email and password are different, of course):
>
> archive-mails.sh
> echo 'cleaning Spam/Ham folders'
> archivemail -d 5 --delete imaps://"spamass@bioprocess.org
> ":"email-terminator2020!"@imap.ionos.de/Spam
> archivemail -d 5 --delete imaps://"spamass@bioprocess.org
> ":"email-terminator2020!"@imap.ionos.de/Ham
>
> keybindings.rb
> modes["inbox-mode"].keymap.add :label_spamassassin_spam, "Label as 
> SpamAssassin Spam", 's'
> modes["inbox-mode"].keymap.add :label_spamassassin_ham, "Label as 
> SpamAssassin Ham", 'h'
> modes["search-results-mode"].keymap.add :label_spamassassin_spam, "Label 
> as SpamAssassin Spam", 's'
> modes["search-results-mode"].keymap.add :label_spamassassin_ham, "Label 
> as SpamAssassin Ham", 'h'
>
> startup.rb
> class Redwood::InboxMode
>   def label_spamassassin_spam
>     thread = cursor_thread or return
>     spamassassin_maildir_path = "/home/rob/Maildir/SpamAssassin/Spam/cur/"
>     message_file = File.join(
>       thread.latest_message.source.file_path,
>       thread.latest_message.source_info.to_s)
>     toggle_spam
>     FileUtils.cp(message_file, spamassassin_maildir_path)
>     BufferManager.flash "Copied to SpamAssassin Spam file: 
> #{File.basename message_file}"
>   end
> end
>
> class Redwood::InboxMode
>   def label_spamassassin_ham
>  thread = cursor_thread or return
>  spamassassin_maildir_path = "/home/rob/Maildir/SpamAssassin/Ham/cur/"
>  message_file = File.join(
>  thread.latest_message.source.file_path,
>  thread.latest_message.source_info.to_s)
>  thread.apply_label :ham
>  FileUtils.cp(message_file, spamassassin_maildir_path)
>     BufferManager.flash "Copied to SpamAssassin Ham file: #{File.basename 
> message_file}"
>   end
> end
>
> class Redwood::SearchResultsMode
>   def label_spamassassin_spam
>     thread = cursor_thread or return
>     spamassassin_maildir_path = "/home/rob/Maildir/SpamAssassin/Spam/cur/"
>     message_file = File.join(
>       thread.latest_message.source.file_path,
>       thread.latest_message.source_info.to_s)
>     toggle_spam
>     FileUtils.cp(message_file, spamassassin_maildir_path)
>     BufferManager.flash "Copied to SpamAssassin Spam file: 
> #{File.basename message_file}"
>   end
> end
>
> class Redwood::SearchResultsMode
>   def label_spamassassin_ham
>  thread = cursor_thread or return
>  spamassassin_maildir_path = "/home/rob/Maildir/SpamAssassin/Ham/cur/"
>  message_file = File.join(
>  thread.latest_message.source.file_path,
>  thread.latest_message.source_info.to_s)
>  thread.apply_label :ham
>  FileUtils.cp(message_file, spamassassin_maildir_path)
>     BufferManager.flash "Copied to SpamAssassin Ham file: #{File.basename 
> message_file}"
>   end
> end
>
> note: The source_info needed a conversion to string: .to_s
>
> Thanks a lot again; sup is really mighty!
>
> Best regards, 
>
> Robert 
>
>
> On Friday, 10 July 2020 15:29:19 UTC-5, Iain Parris wrote:
>>
>> Excerpts from Iain Parris's message of 2020-07-10 21:26:12 +0100: 
>> > Assuming your source is also another Maildir, then we can find the full 
>> > path for the original message file. Then we can do a direct file copy 
>> of 
>> > this file into your SpamAssassin Spam Maildir. 
>>
>> I should add: in this demo, we copy only the *latest* message in the 
>> thread. 
>>
>> Kind regards, 
>> Iain 
>>
>