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From: Vladimir Nikishkin <lockywolf@gmail.com>
To: Bastien <bzg@gnu.org>
Cc: emacs-orgmode <emacs-orgmode@gnu.org>
Subject: Re: org-babel prepends <<noweb>> expansions with the prefix of the <<tag>>? Can this be turned off?
Date: Thu, 10 Sep 2020 17:21:21 +0800	[thread overview]
Message-ID: <CA+A2iZbS-cOC+yEXtyX7AJYWQeEU4SAUkjHwJhxtV4Mch4fyKw@mail.gmail.com> (raw)
In-Reply-To: <87363urysl.fsf@gnu.org>

Hello, Bastien,

Thanks for getting back to me.
In ob-core.el, function org-babel-expand-noweb-references, line 2747,
there is a 'mapconcat, that is commented as ";; Interpose PREFIX
between every line."
It prepends the "prefix", that is the content of the block to be
expanded from the beginning of the line where a <<noweb>> reference is
encountered to the beginning of the reference itself, that is to the
first "<".

My point is that this is not the most obvious way to do the expansion.
It does work if the "prefix" is a line comment character, similar to C++ "//"

However, consider the following example:

```
# -*- mode: org; -*-

* test
  :PROPERTIES:
  :header-args:    :noweb yes
  :END:

#+name: block1
#+begin_src shell
printf "test1 \n"
printf "test2 \n"
printf "test3 \n"

#+end_src

#+begin_src shell :shebang "#!/bin/chibi-scheme"
#<<block1>> <<block1>>

#+end_src
```

Expanding this example gives:

```
#printf "test1 \n"
#printf "test2 \n"
#printf "test3 \n"
# printf "test1 \n"
#<<block1>> printf "test2 \n"
#<<block1>> printf "test3 \n"
#<<block1>>
```

Not a very obvious interpretation!
At least I would expect the following instead:

```
#printf "test1 \n"
printf "test2 \n"
printf "test3 \n" printf "test1 \n"
printf "test2 \n"
printf "test3 \n"
```

Because at least it wouldn't leave anything resembling a "<<noweb>>"
block in the expansion result.

Thanks for looking at this issue.

Vlad

On Mon, 7 Sep 2020 at 12:33, Bastien <bzg@gnu.org> wrote:
>
> Hi Vladimir,
>
> Vladimir Nikishkin <lockywolf@gmail.com> writes:
>
> > That's not entirely what I want.
>
> What do you want instead?  It's not clear to me from your example.
>
> Thanks,
>
> --
>  Bastien



-- 
Yours sincerely, Vladimir Nikishkin

     prev parent reply	other threads:[~2020-09-10  9:27 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-25  2:09 org-babel prepends <<noweb>> expansions with the prefix of the <<tag>>? Can this be turned off? Vladimir Nikishkin
2020-02-25  7:00 ` Johannes Dahl
2020-02-25  7:11   ` Johannes Dahl
2020-09-07  4:33 ` Bastien
2020-09-10  9:21   ` Vladimir Nikishkin [this message]

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