3.12 Pipe Folder

In the pipe folder, messages are automatically transferred from the source folder to destination folder.

Format:

`|' source-folder `|' destination-folder

When you access the pipe folder, messages are automatically transferred from source-folder to destination-folder. It is convenient if you want to download messages to local disk via POP. For example, if you specify following

|&username@popserver|+inbox

and access it, Wanderlust downloads messages from `&username@popserver' to `+inbox' automatically.

On the other hand, if you put `|:' instead of second `|', then messages are copied to the destination folder (not deleted from source-folder). At the next time you access that folder, copies new messages only.

`|' source-folder `|:' destination-folder

If you want to copy messages from POP server and view them, specify the folder as follows:

|&username@popserver|:+inbox

where messages will be kept on the server.

Example:

|%inbox|%myinbox   -> Download %inbox to %myinbox.
|*&user@popserver1,&user@popserver2|+inbox
         -> Download from &user@popserver1 and &user@popserver2 to +inbox.
|-gnu.emacs.sources|:+sources
         -> Copy messages from -gnu.emacs.sources to +sources.

After messages are moved, a hook elmo-pipe-drained-hook is called.