Re: [O] [bugs] Export to HTML requires issuing org-babel-execute-buffer; results replace fails

[Leo Alekseyev]

On Mon, Jan 23, 2012 at 11:58 AM, Eric Schulte <address@hidden> wrote:
> Leo Alekseyev <address@hidden> writes:
>
>> Since all source blocks are evaluated on export, I don't think it
>> should be necessary to issue org-babel-execute-buffer before invoking
>> export.  However, running HTML export without org-babel-execute-buffer
>> currently produces garbage output.
>>
>
> What do you mean by "garbage" output?

That wasn't a very good description, sorry.
......
I just wrote a detailed description of the bug, and then remembered
that I forgot to copy the latest org pull into
/usr/share/emacs/24/lisp/org.  This bug is now gone, probably as a
result of you fixing export evaluation order.  However, the
description of "replace results" bug is still relevant.  I'll denote
issues that are now fixed with appropriate markup.

#+BEGIN_MOOT_POINT
Take test-export4.org from my original message, and export (C-c C-e h;
don't evaluate the buffer beforehand).  You will see the following
output: http://i.imgur.com/IM3oy.png

There are two problems:
(1) Notice that the output of _every_ src_R block is "images/conv2.png"
It should be "conv1.png" on the first invocation "conv2.png" on the
second, and "conv3.png" on the third.
(2) The last src_R block is not evaluated and, in fact, appears in the
output (which it shouldn't), mangled, as the underscore is taken as a
subscript.
#+END_MOOT_POINT

For comparison, if you first evaluate the buffer, and then export, you
will see this:
http://i.imgur.com/V6PXq.png

The output of the src_R blocks is now correct, but I don't see why one
needs to pre-evaluate the buffer to get correct output on export.  The
overall output, as you can see, is _not_ correct, since the results
from invocation of src_R blocks via the export are _appended_ to those
that were generated via C-c C-v b.

>
> Could you isolate a minimal example demonstrating just the failure of
> results replacement?

Run the below code a few times with C-c C-v b, and you'll see

------------snip---------
#+property: session *R-babel*

#+NAME: foo
#+HEADER: :var plot.filename="conv1.png"
#+BEGIN_SRC R :results output silent
  cat.fname.link <- function() { cat(plot.filename,"\n",sep="") }
  cat.fname.link()
#+END_SRC

src_R[:results output replace]{ cat.fname.link() }
------------snip---------


You can also replace src_R with

#+begin_src R :results output raw replace :exports results
 cat.fname.link()
#+end_src

and it will also fail to replace results.

All the above examples were run with the latest pull of org.

HTH,

--Leo