Re: [PATCH v3] ob-tangle.el: Blocks overwrite each other when grouping before tangling

[Ihor Radchenko]

Evgenii Klimov <eugene.dev@lipklim.org> writes:

> Here are the new tests that demonstrate the bug in block grouping during
> block collection, along with the patch to address the issue, taking your
> previous remarks into account.

Thanks!
The second patch is malformed. May you please resend?

(You can see the problem if you try to download the second patch in 
<87bkg1h4q3.fsf@lipklim.org/T/#u">https://list.orgmode.org/87bkg1h4q3.fsf@lipklim.org/T/#u>)

> I split it into two patches so you can apply the tests first to see the
> bug.  And probably tests should be rewritten as they look too complex
> and mostly duplicate each other.  I'd appreciate your suggestions
> on how to enhance them.

If you can, please avoid using `org-test-at-id'. This is much less
readable compared to explicit org-test-with-temp-text because one needs
to reach out to another file in order to understand what the test is
about.

>>>  Optional argument TARGET-FILE can be used to specify a default
>>> -export file for all source blocks.
>>> +export file for all source blocks without :tangle header
>>> +argument.
>>
>> This is confusing.
>> Is :tangle yes "without"?
>> What about inheritance?
>> What about default header args?
>
> I just find current lack of details confusing as well and want to
> express the place of TARGET-FILE in the lineage of :tangle in
> ~org-babel-get-src-block-info~:
>     1. org-babel-default-header-args
>        1. TANGLE-FILE of ~org-babel-tangle~
>     2. org-babel-default-header-args:<lang>
>     3. org-babel-params-from-properties
>     4. org-element-property :parameters datum
>     5. org-element-property :header datum
>
> It wasn't clear for me: will ":tangle yes" or explicit ":tangle no" be
> affected by TARGET-FILE.  Maybe if we rephrase as follows it will be
> clear for both of us:
>
>     Optional argument TARGET-FILE can be used to overwrite a default
>     export file in `org-babel-default-header-args' for all source
>     blocks.

In `org-babel-tangle', TARGET-FILE is set as fallback value for the
blocks that have no :tangle value at all, including inherited; including
:tangle yes.

The manual asserts

    ‘yes’
         Export the code block to source file.  The file name for the source
         file is derived from the name of the Org file, and the file
         extension is derived from the source code language identifier.
         Example: ‘:tangle yes’.

So, "yes" should imply :tangle <Org file name.lang-ext>

`org-babel-tangle-collect-blocks' handles this by

          (unless (or (string= src-tfile "no")
                      (and tangle-file (not (equal tangle-file src-tfile)))
                      (and lang-re (not (string-match-p lang-re src-lang))))

So, :tangle no is always excluded.
When TANGLE-FILE is set and not equal to :tangle value (including
"yes"), block is also excluded.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>