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From: Ken Mankoff <mankoff@gmail.com>
To: Ihor Radchenko <yantar92@posteo.net>
Cc: Max Nikulin <manikulin@gmail.com>, emacs-orgmode@gnu.org
Subject: Re: [PATCH] lisp/ob-screen.el: Support ~:var~ header args for babel blocks
Date: Thu, 16 Mar 2023 00:12:26 -0400	[thread overview]
Message-ID: <874jqluyfp.fsf@t480.home> (raw)
In-Reply-To: <87a60yxec3.fsf@localhost>

Hi Ihor and Max,

Just a follow-up note that I am unlikely to be able to complete this patch anytime soon. Re-alignment of priorities because my need for :var header support in Org Babel is mitigated by a different method of injecting variables into Org Babel sections: Use noweb.

I find this more powerful than =:var=. The examples below show (1) setting a bash environment variable in screen, or (2) printing from a Python prompt after sshing to a remote computer. It is language agnostic. Because it uses PROPERTIES and not :var, it also lets me work in Org Column View mode.

* Header
:PROPERTIES:
:foo: 42
:END:

#+NAME: ex1-screen-bash
#+BEGIN_SRC screen
export foo="<<get_property("foo")>>"
#+END_SRC

#+NAME: ex2-ssh-python
#+BEGIN_SRC bash
ssh somewhere
python
print("<<get_property("foo")>>")
#+END_SRC

#+CALL: ex2-ssh-python()

#+RESULTS:
: foo


The relevant section from my library-of-babel is:

* Properties into header args
:PROPERTIES:
:hellomessage: hello
:END:

https://emacs.stackexchange.com/questions/41922/

#+NAME: get_property
#+BEGIN_SRC emacs-lisp :var prop_name="" :results silent
(org-with-point-at org-babel-current-src-block-location
  (org-entry-get nil prop_name t))
#+END_SRC

** Example Usage

*** Header arg

#+HEADER: :var prop_message=(org-entry-get nil "hellomessage" t)
#+BEGIN_SRC emacs-lisp
  (message prop_message)
#+END_SRC

#+RESULTS:
: hello

*** Noweb
#+BEGIN_SRC emacs-lisp :noweb yes
  (message "<<get_property("hellomessage")>>")
#+END_SRC

#+RESULTS:
: hello

#+BEGIN_SRC bash :noweb yes :results verbatim
echo "<<get_property("hellomessage")>>"
#+END_SRC

#+RESULTS:
: hello

If hope this helps someone if they need it.

  -k.

next prev parent reply	other threads:[~2023-03-16  4:13 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-24 17:03 [PATCH] lisp/ob-screen.el: Support ~:var~ header args for babel blocks Ken Mankoff
2023-02-24 18:33 ` Ken Mankoff
2023-02-25  3:51   ` Max Nikulin
2023-02-25 15:14     ` Ken Mankoff
2023-02-25 15:19       ` Ken Mankoff
2023-02-25 16:05       ` Max Nikulin
2023-02-25 16:47         ` Ken Mankoff
2023-02-26 10:11           ` Max Nikulin
2023-02-27  1:59             ` Ken Mankoff
2023-02-28 10:40               ` Ihor Radchenko
2023-03-16  4:12                 ` Ken Mankoff [this message]
2023-03-16 10:22                   ` Ihor Radchenko
2023-03-16 15:09                     ` [PATCH v4] " Max Nikulin
2023-03-17 11:41                       ` Max Nikulin
2023-03-18 12:08                       ` Ihor Radchenko
2023-03-19 14:42                       ` Ken Mankoff
2023-03-21 14:12                         ` Max Nikulin
2023-03-02 13:38               ` [PATCH] " Max Nikulin
2023-02-26 12:18           ` Ihor Radchenko
2023-02-27  1:59             ` Ken Mankoff
2023-02-27 19:43               ` Ihor Radchenko

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