On Jan 7, 2011, at 1:08 PM, Štěpán Němec wrote:
Carsten Dominik <carsten.domi...@gmail.com> writes:
On Jan 6, 2011, at 11:26 PM, Nick Dokos wrote:
Rainer M Krug <r.m.k...@gmail.com> wrote:
Hi
I want to use a Capture Template to record changes to files under
version control. Everything works as expected, but I would like to
include the current revision in the template.
Therefore I tried the following:
* %T %? at %a by Rainer M Krug, email: rai...@krugs.de
%(vc-working-revision buffer-file-name)
for the template, but I get an error:
**** <2011-01-06 Thu 13:06> at
[[file:~/Documents/Projects/BiocontrolAndAlienDynamics/
nonSpatialAcacia/trunc/R/nsa.org::*Finalise][Finalise]]
by Rainer M Krug, email: rai...@krugs.de %![Error: (wrong-type-
argument
stringp nil)]
Any idea how I could get the revision of the org file from which
the
Capture has been initiated (here
~/Documents/Projects/BiocontrolAndAlienDynamics/nonSpatialAcacia/
trunc/R/nsa.org
)?
There are a few problems: the evaluation of the sexp happens in the
capture buffer where buffer-file-name returns nil. Even if you could
get the file name, vc-working-revision would return nil on a file
that
is not VC-registered and the template would barf.
Those are easy problems to solve but there is another one that seems
insurmountable (with current code): my original thought was to use
the
%a escape to pass the link to a lisp function, extract the file name
from it[fn:1] and run vc-working-revision on it (with appropriate
safeguards
to catch non-VC files), something like this:
"* %T %? at %a by Rainer M Krug, email: rai...@krugs.de %(rk-
custom-function-to-get-vc-revision \"%a\")"
However, this fails because at the time that %(sexp) constructs are
expanded, simple %a etc. constructs have not been expanded yet, so
what
the function above gets is a literal "%a": the subtitution
sequence is
;; %[] Insert contents of a file.
...
;; %() embedded elisp
...
;; Simple %-escapes
(see lisp/org-capture.el, lines 1181-1229 or so).
Moreover, this sequence was different and was changed deliberately
(see
the thread http://thread.gmane.org/gmane.emacs.orgmode/27649), so
if it
is changed back, Sebastion Rose will not be happy :-)
So it seems there is no way to pass values from the capture
context to a
lisp function in the capture template, but maybe I'm missing
something.
Thanks,
Nick
Footnotes:
[fn:1] Is there an easier way to get the filename of the file I was
visiting when I initiated the capture? If not, should there be?
Perhaps
a %f escape?
Hi Nick,
you can use
(buffer-file-name (org-capture-get :original-buffer))
and we could certainly introduce a special escape for it if helpful.
If it is easier, we can also put the filename itself into the
property list,
and any other information we like. This should happen in the
function
org-capture,
close to the location where the buffer is stored, so near this line:
(org-capture-put :original-buffer orig-buf :annotation annotation
:initial initial)
org-capture uses this property list precisely so that it is simple
to add any information required.
Note that, after the template has been filled in, it is better
to access information in the property list with
(org-capture-get PROPERTY 'local)
to avoid conflicts with other ongoing capture processes.
Hope this helps.
Why aren't the %() expressions simply evaluated in the original buffer
(if available)? That would solve these issues in a general way. It
seems
to me that there is no advantage to evaluating the expressions in the
temporary capture buffer, but I'm not familiar with the code so I
might
be missing something. Is there a reason for that?
The sexp can be used to insert stuff into the template, so I think it
is correct to evaluate it in the template buffer.
- Carsten
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