* How is the return value of `org-babel-execute:FOO` interpreted?
@ 2021-10-02 16:43 Kodi Arfer
2021-10-03 9:38 ` Ihor Radchenko
0 siblings, 1 reply; 8+ messages in thread
From: Kodi Arfer @ 2021-10-02 16:43 UTC (permalink / raw)
To: emacs-orgmode
I have an `org-babel-execute` function for the Hy programming language that seems to have partly broken when I upgraded Org (from 9.1.14 to 9.4.6). It has code to write a plot to a file when a `:file` argument is given to the code block. It returns `nil` in this case, and previously, Org would automatically insert a link to the file in the results block, as desired. Now, however, the `nil` is printed in the results block. So I guess have to edit the function to return a link instead, but I can't find documentation for how Org interprets the return value of an `org-babel-execute` function: as I vaguely recall, you have to use a certain cons structure to produce a table, another to produce a link, and so on. So the concrete question in this case is: what do I return to put a link in the document?
Here's my code in case it's helpful, but it isn't pretty: https://github.com/Kodiologist/Daylight/blob/37e38d216ffe41ad3537522c40ccf1cdb134bbbc/daylight.el#L430
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: How is the return value of `org-babel-execute:FOO` interpreted?
2021-10-02 16:43 How is the return value of `org-babel-execute:FOO` interpreted? Kodi Arfer
@ 2021-10-03 9:38 ` Ihor Radchenko
2021-10-03 12:03 ` Kodi Arfer
0 siblings, 1 reply; 8+ messages in thread
From: Ihor Radchenko @ 2021-10-03 9:38 UTC (permalink / raw)
To: Kodi Arfer; +Cc: emacs-orgmode
Kodi Arfer <listu@arfer.net> writes:
> I have an `org-babel-execute` function for the Hy programming language that seems to have partly broken when I upgraded Org (from 9.1.14 to 9.4.6). It has code to write a plot to a file when a `:file` argument is given to the code block. It returns `nil` in this case, and previously, Org would automatically insert a link to the file in the results block, as desired. Now, however, the `nil` is printed in the results block. So I guess have to edit the function to return a link instead, but I can't find documentation for how Org interprets the return value of an `org-babel-execute` function: as I vaguely recall, you have to use a certain cons structure to produce a table, another to produce a link, and so on. So the concrete question in this case is: what do I return to put a link in the document?
I just tested using ob-gnuplot and :file link is correctly inserted when
org-babel-execute:gnuplot returns nil.
Are you sure that you have :file parameter in the source block you tried
to execute?
Best,
Ihor
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: How is the return value of `org-babel-execute:FOO` interpreted?
2021-10-03 9:38 ` Ihor Radchenko
@ 2021-10-03 12:03 ` Kodi Arfer
2021-10-03 12:20 ` Ihor Radchenko
0 siblings, 1 reply; 8+ messages in thread
From: Kodi Arfer @ 2021-10-03 12:03 UTC (permalink / raw)
To: Ihor Radchenko; +Cc: emacs-orgmode
On 2021 Oct 03 Sun 5:38:10 AM -0400, Ihor Radchenko <yantar92@gmail.com> wrote:
> Kodi Arfer <listu@arfer.net> writes:
>> I have an `org-babel-execute` function for the Hy programming
>> language that seems to have partly broken when I upgraded Org (from
>> 9.1.14 to 9.4.6). …
>
> I just tested using ob-gnuplot and :file link is correctly inserted when
> org-babel-execute:gnuplot returns nil.
>
> Are you sure that you have :file parameter in the source block you tried
> to execute?
Yes, this is my code block:
#+begin_src hy :file g/foo.png
(plt.scatter [1 2 3] [4 5 -9])
#+end_src
And it looks like `org-babel-execute:hy` is indeed receiving the argument, since `(message "%s" (assq :file (org-babel-process-params params)))` prints "(:file . g/foo.png)".
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: How is the return value of `org-babel-execute:FOO` interpreted?
2021-10-03 12:03 ` Kodi Arfer
@ 2021-10-03 12:20 ` Ihor Radchenko
2021-10-03 12:39 ` Ihor Radchenko
0 siblings, 1 reply; 8+ messages in thread
From: Ihor Radchenko @ 2021-10-03 12:20 UTC (permalink / raw)
To: Kodi Arfer; +Cc: emacs-orgmode
Kodi Arfer <listu@arfer.net> writes:
>> Are you sure that you have :file parameter in the source block you tried
>> to execute?
>
> Yes, this is my code block:
>
> #+begin_src hy :file g/foo.png
> (plt.scatter [1 2 3] [4 5 -9])
> #+end_src
What about
#+begin_src hy :results file :file g/foo.png
(plt.scatter [1 2 3] [4 5 -9])
#+end_src
?
Best,
Ihor
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: How is the return value of `org-babel-execute:FOO` interpreted?
2021-10-03 12:20 ` Ihor Radchenko
@ 2021-10-03 12:39 ` Ihor Radchenko
2021-10-03 12:49 ` Kodi Arfer
0 siblings, 1 reply; 8+ messages in thread
From: Ihor Radchenko @ 2021-10-03 12:39 UTC (permalink / raw)
To: Kodi Arfer; +Cc: emacs-orgmode
Ihor Radchenko <yantar92@gmail.com> writes:
> Kodi Arfer <listu@arfer.net> writes:
>
>>> Are you sure that you have :file parameter in the source block you tried
>>> to execute?
>>
>> Yes, this is my code block:
>>
>> #+begin_src hy :file g/foo.png
>> (plt.scatter [1 2 3] [4 5 -9])
>> #+end_src
>
> What about
>
> #+begin_src hy :results file :file g/foo.png
> (plt.scatter [1 2 3] [4 5 -9])
> #+end_src
>
> ?
If this code works for you, the problem is the folloing incompatible
change in Org 9.3 (see etc/ORG-NEWS file in the repo):
* Version 9.3
** Incompatible changes
*** ~:file~ header argument no longer assume "file" ~:results~
The "file" ~:results~ value is now mandatory for a code block
returning a link to a file. The ~:file~ or ~:file-ext~ header
arguments no longer imply a "file" result is expected.
Best,
Ihor
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: How is the return value of `org-babel-execute:FOO` interpreted?
2021-10-03 12:39 ` Ihor Radchenko
@ 2021-10-03 12:49 ` Kodi Arfer
2021-10-03 13:09 ` Ihor Radchenko
0 siblings, 1 reply; 8+ messages in thread
From: Kodi Arfer @ 2021-10-03 12:49 UTC (permalink / raw)
To: Ihor Radchenko; +Cc: emacs-orgmode
On 2021 Oct 03 Sun 8:39:37 AM -0400, Ihor Radchenko <yantar92@gmail.com> wrote:
> Ihor Radchenko <yantar92@gmail.com> writes:
>
>> Kodi Arfer <listu@arfer.net> writes:
>>
>>>> Are you sure that you have :file parameter in the source block you tried
>>>> to execute?
>>>
>>> Yes, this is my code block:
>>>
>>> #+begin_src hy :file g/foo.png
>>> (plt.scatter [1 2 3] [4 5 -9])
>>> #+end_src
>>
>> What about
>>
>> #+begin_src hy :results file :file g/foo.png
>> (plt.scatter [1 2 3] [4 5 -9])
>> #+end_src
>>
>> ?
>
> If this code works for you, the problem is the folloing incompatible
> change in Org 9.3 (see etc/ORG-NEWS file in the repo):
>
> * Version 9.3
> ** Incompatible changes
> *** ~:file~ header argument no longer assume "file" ~:results~
>
> The "file" ~:results~ value is now mandatory for a code block
> returning a link to a file. The ~:file~ or ~:file-ext~ header
> arguments no longer imply a "file" result is expected.
It works, thank you. I should've looked at the changelog more closely. I wonder why this change was made. It would be annoyingly redundant to put `:results file` next to every `:file`. I already have code to change the default value of `:results` when `:file` is set, for a different Babel language, so I should be able to adapt that to this language.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: How is the return value of `org-babel-execute:FOO` interpreted?
2021-10-03 12:49 ` Kodi Arfer
@ 2021-10-03 13:09 ` Ihor Radchenko
0 siblings, 0 replies; 8+ messages in thread
From: Ihor Radchenko @ 2021-10-03 13:09 UTC (permalink / raw)
To: Kodi Arfer; +Cc: emacs-orgmode
Kodi Arfer <listu@arfer.net> writes:
> It works, thank you. I should've looked at the changelog more closely. I wonder why this change was made. It would be annoyingly redundant to put `:results file` next to every `:file`. I already have code to change the default value of `:results` when `:file` is set, for a different Babel language, so I should be able to adapt that to this language.
There are tools like subtree-local headers args or default headers args
at your disposal.
The argument why that change was made is the following (commit 26ed66b23):
>> Deducing the results from some other arguments is not obvious.
>> Moreover, it prevents users from setting, e.g., :file-ext, in a node
>> property, as every block would then create a file.
>>
>> Reported-by: Alex Fenton <alex@pressure.to>
>> <http://lists.gnu.org/r/emacs-orgmode/2018-05/msg00469.html>
Best,
Ihor
^ permalink raw reply [flat|nested] 8+ messages in thread
* How is the return value of `org-babel-execute:FOO` interpreted?
@ 2021-10-02 13:27 Kodi Arfer
0 siblings, 0 replies; 8+ messages in thread
From: Kodi Arfer @ 2021-10-02 13:27 UTC (permalink / raw)
To: emacs-orgmode
I have an `org-babel-execute` function for the Hy programming language that seems to have partly broken when I upgraded Org (from 9.1.14 to 9.4.6). It has code to write a plot to a file when a `:file` argument is given to the code block. It returns `nil` in this case, and previously, Org would automatically insert a link to the file in the results block, as desired. Now, however, the `nil` is printed in the results block. So I guess have to edit the function to return a link instead, but I can't find documentation for how Org interprets the return value of an `org-babel-execute` function: as I vaguely recall, you have to use a certain cons structure to produce a table, another to produce a link, and so on. So the concrete question in this case is: what do I return to put a link in the document?
Here's my code in case it's helpful, but it isn't pretty: https://github.com/Kodiologist/Daylight/blob/37e38d216ffe41ad3537522c40ccf1cdb134bbbc/daylight.el#L430
^ permalink raw reply [flat|nested] 8+ messages in thread
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2021-10-02 16:43 How is the return value of `org-babel-execute:FOO` interpreted? Kodi Arfer
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2021-10-03 12:03 ` Kodi Arfer
2021-10-03 12:20 ` Ihor Radchenko
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