Re: remote plot with local output?

["Charles C. Berry" <ccberry@ucsd.edu>]

On Tue, 15 Sep 2015, Benda Xu wrote:

> Dear All,
>
> I am looking for a way to configure org-babel so that a program runs
> remotely and outputs locally.  An example is
>
>  #+NAME: line
>   | 1 |
>   | 2 |
>   | 3 |
>
>  #+BEGIN_SRC python :results file :var dt=line :dir /ipmuap02:/tmp
>    from matplotlib import pylab as plt
>    plt.plot(dt)
>    plt.savefig("line.png")
>    return "line.png"
>  #+END_SRC
>
>  #+RESULTS:
>  [[file:/scp:ipmuap02:/tmp/line.png]]
>
> I would like to embed this figure into my note.  The example above need
> to fetch the figure from the remote host on each exportation, which is
> very sensitive to the network environment.
>
> I cannot make the plot locally, because (unlike the over-simplified
> example) some potentially big data are only available remotely.
>
> My solution is to cache the result (:cache yes), execute the code block,
> copy the output file to localhost, update the #+RESULTS link to the
> local one, manually.  Now I am facing many such tasks and feel like
> automating that.
>
>
> What is the recommended way for copying the file output from an remote
> execution code block back to localhost?
>

Look at the :post header arg

 	(info "(org) post")

You write a src block that extracts the remote file name from *this*,
creates a local file name from it, copies the remote file to the local 
host, then substitutes the local file name in *this* and uses it as the 
return value.

Use the name of that src block as the argument to :post

HTH,

Chuck