Achim Gratz <strom...@nexgo.de> writes: > Eric Schulte writes: >>> #+BEGIN_SRC gnuplot :file test.eps >>> reset >> ^ >> WRT |, I've also added the *org-babel-gnuplot-prefix* variable, which >> may be set to e.g., "reset" to reset the gnuplot process between code >> blocks. > > We have recently introduced similar functionality in ob-perl and it > probably deserves a more general treatment and easier customization. > Doing these things with defcustoms or defvars should be shunned, since > it makes Org files using these options inherently unportable and > non-self-contained. >
Agreed. > > For the functionality that is implemented here, I'd think two new > general header arguments are appropriate, namely :prolog and :epilog, I've added prologue and epilogue header arguments. They are implemented for gnuplot and any language which uses `org-babel-expand-body:generic'. The particular case of closing the gnuplot output terminal does not use the epilogue, but rather happens automatically only in those cases in which the output is explicitly set. > > which should take the name of a source block (same language), a > literal string in quotes, the result of an inline call of another > source block and inline elisp (the result of execution must be in the > appropriate syntax) as an argument. We might need some friendlier way > than elisp if we want to use URL (esp. file:…) in the same capacity. > For session execution there may be a need to distibguish between the > session start, subsequent invocations and perhaps closing of the > session (we don't have that at the moment, I think). > I think standard header arguments should suffice. Thanks, > > > Regards, > Achim. -- Eric Schulte http://cs.unm.edu/~eschulte
