[Erc-help] checking if log directory exists

[Max F. <mf...@w3...>]

[erc.el 1.509]

After being frustrated at erc not telling me that the directory I
specified in erc-log-channels-directory was wrong, causing it to not
log anything and me to lose precious information, I changed
erc-directory-writable-p to check more things:

(defun erc-directory-writable-p (dir)
  "Determines whether the DIR is a writable directory. If it doesn't exist,
   create it."

  (unless (file-attributes dir) (make-directory dir))
  (or (file-accessible-directory-p dir) (error "cannot access %s" dir)))


Additionally I think logging code could be simplified by removing
erc-log-channels and just use the value of erc-logs-channels-directory
to find out whether we're logging or not.

Cheers,

Max.