* [2024-07-12 13:23] Ihor Radchenko:> Phil <pe@7d.nz> writes:
>> To tangle to multiple destinations
>
> a logic extension of the existing tangle mechanism.
> 1) Introduce :tangle-directory parameter that defines
>    relative directory to be used as tangle target; this
>    directory, if defined, will be used instead of the Org
>    file directory to expand the tangle target;
> 2) Allow :tangle-directory and :tangle-file to be a list
>    of targets to write.
>
> Then, we can modify `org-babel-effective-tangled-filename'
> to account for :tangle directory and modify
> `org-babel-tangle' (as you did) to write to multiple
> targets.

All right. So I have it working for single blocks by
modifying only `org-babel-tangle' with :tangle-directory
accepting a single string or a list, e.g.

:tangle-directory '("dir1" "/ssh:host1:/dir2" "/-::/etc")

The option is ignored for file-wide tangle.

What do you think of, instead of adding :tangle-directory,
modifying :tangle to make it accept also a list?

Since I may not get back to this in the next weeks,
I'm saving the following note and a patch as a current
status of the function for later.

=:tangle-directory dir= is set
- Tangle globally
       |--------+------------------+--------------|
       | tangle | expected result  | current      |
       |--------+------------------+--------------|
       | yes    |             ignore dir          |
       | no     |             ignore dir          |
       | file   | block → dir/file?| block → file |
       |--------+------------------+--------------|
- Tangle a single block
       |--------+------------------+---------------------------|
       | tangle | expected result  | current                   |
       |--------+------------------+---------------------------|
       | yes    | ?                | dir/[org-folder/org-file] |
       | no     | error?           | dir (as file or folder)   |
       | file   | tangle to TD+dir | tangle to TD+dir          |
       |--------+------------------+---------------------------|

Cheers,

Phil