[bug#43193] [PATCH] guix: Add --with-dependency-source option

[Jesse Gibbons <jgibbons2357@gmail.com>]

This is a friendly bump.

On 9/26/20 4:46 PM, Jesse Gibbons wrote:
> Attached are the patches that make the --with-source option recursive, 
> add documentation, add a test, adjust a test, and update the news.
>
> As expected, the changes I made are incompatible with the test 
> "options->transformation, with-source, no matches". Since 
> options->transformation, with-source does a recursive replacement, it 
> returns a clone of the package in question. I have tried changing the 
> comparison to eq?, eqv? and equal?, each returning false, so I settled 
> on a (limited) comparison of the packages' attributes.
>
> On 9/13/20 6:55 AM, Ludovic Courtès wrote:
>> Hi,
>>
>> Jesse Gibbons <jgibbons2357@gmail.com> skribis:
>>
>>> On 9/11/20 9:43 AM, Ludovic Courtès wrote:
>> [...]
>>
>>>> So maybe drop the second clause for non-recursive replacement, and 
>>>> drop
>>>> ‘transform-package-source’ as well.
>>> I included a fallback to transform-package-source because the
>>> following happens:
>>>
>>> $ ./pre-inst-env guix build --with-source=$(guix build --source 
>>> hello) hello
>>> guix build: error: invalid source replacement specification:
>>> "/gnu/store/hbdalsf5lpf01x4dcknwx6xbn6n5km6k-hello-2.10.tar.gz"
>>>
>>> This does not fail when I fall back to the non-recursive logic.
>>>
>>> I can drop transform-package-source, but I will need to do some more
>>> hacking to figure out how the package name and version are parsed from
>>> the file name as described in the manual, and move it to the logic in
>>> transform-package-inputs/source.
>> Yes, that’d be nice.  Namely, if you do:
>>
>>    guix build hello --source=hello-1.2.3.tar.gz
>>
>> it should work just as now (from the source file name, we assume that
>> the source applies to package “hello”).
>>
>> Conversely, doing:
>>
>>    guix build hello --source=xyz-hello-1.2.3.tar.gz
>>
>> would have no effect.  It would not even emit a warning, unlike now.
>>
>>> I'm not going to have as much free time starting next week, so I might
>>> not be able to do that for a while, but I will try to get it done
>>> ASAP.
>> Sure, let’s stay in touch, I think we’re almost done!
>>
>> Thank you,
>> Ludo’.