[SAoC] New proposal: solve dependency hell for dub

[Seb]

On Monday, 12 August 2019 at 10:34:40 UTC, Joseph Rushton 
Wakeling wrote:
> On Saturday, 10 August 2019 at 17:43:06 UTC, Seb wrote:
>> https://github.com/dlang/projects/issues/51
>>
>> tl;dr:
>> - I just proposed a  SAoC project that might be of interest to 
>> people interested in the SAoC
>> - The project is about allowing multiple versions of a 
>> dependency in your dub project
>> - It is vital for many projects (in particular: moving Phobos 
>> to Dub)
>
> It may be a good idea to make sure that issues related to 
> single-version dependencies are fixed first, e.g. 
> <https://github.com/dlang/dub/issues/1732>, otherwise we risk a 
> situation where multi-version dependencies are created 
> unnecessarily.
>
> BTW, why is this considered _vital_ for moving phobos to DUB?  
> I am not really convinced that Rust's approach is a solution -- 
> it feels more like a dirty workaround that will have plenty of 
> pain points of its own.

This was my personal opinion. The project description contains a 
general problem description.

Anyhow, you need to maintain compatibility with people using the 
current version. If we ever want to convert the standard library 
into a dub project, current code _must_ contain to work.

Sure, you can do 'import std2' etc, but I don't think this scales 
well and at least I don't want to write 'import std3_23'.

Also, as far as I am aware the Rust solution has been extremely 
successful for them and a vital part of their flourishing 
ecosystem. I'm open to better solutions though ;-)