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mu4e.texi: add hint about getting fields from raw messages 

from a mailing-list reply, a quick & dirty way to get arbitrary headers
from a message.
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djcb 2014-09-02 05:15:25 -07:00
parent 08bd686903
commit 068e459cc4
1 changed files with 29 additions and 9 deletions
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mu4e/mu4e.texi
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@ -2345,19 +2345,21 @@ kinds of assumptions, and they are subject to change, and should therefore
@end verbatim @end verbatim
@noindent @noindent
In addition, you should use functions in the right context; functions that In addition, you should use functions in the right context; functions
start with @t{mu4e-view-} are only applicable to the message view, while that start with @t{mu4e-view-} are only applicable to the message view,
functions starting with @t{mu4e-headers-} are only applicable to the headers while functions starting with @t{mu4e-headers-} are only applicable to
view. Functions without such prefixes are applicable everywhere. the headers view. Functions without such prefixes are applicable
everywhere.
@node Message functions @node Message functions
@section Message functions @section Message functions
Many functions in @t{mu4e} deal with message plist (property lists). They Many functions in @t{mu4e} deal with message plist (property
contain information about messages, such as sender and recipient, subject, lists). They contain information about messages, such as sender and
date and so on. To deal with these plists, there are a number of recipient, subject, date and so on. To deal with these plists, there are
@code{mu4e-message-} functions (in @file{mu4e-message.el}), such as a number of @code{mu4e-message-} functions (in @file{mu4e-message.el}),
@code{mu4e-message-field} and @code{mu4e-message-at-point} such as @code{mu4e-message-field} and @code{mu4e-message-at-point}, and
a shortcut to combine the two, @code{mu4e-message-field-at-point}.
For example, to get the subject of the message at point, in either the headers For example, to get the subject of the message at point, in either the headers
view or the message view, you could write: view or the message view, you could write:
@ -2380,6 +2382,24 @@ recipients of the message?''), there is a convenience function
headers view. headers view.
@end itemize @end itemize
Note that the message-functions work available to @t{mu4e} -- the
headers that are stored in the database and, in
@code{mu4e-message-view}-context, the message body.
If you need access to other parts of the message, it is possible to do
so by hand, using the raw-message and some third-party tool like
@t{procmail}'s @t{formail}:
@lisp
(defun my-mu4e-any-message-field-at-point (hdr)
"Quick & dirty way to get an arbitrary header HDR at
point. Requires the 'formail' tool from procmail."
(replace-regexp-in-string "\n$" ""
(shell-command-to-string
(concat "formail -x " hdr " -c < "
(shell-quote-argument (mu4e-message-field-at-point :path))))))
@end lisp
@node Utility functions @node Utility functions
@section Utility functions @section Utility functions