[swift-users] Swift Package Manager and Git submodules

[Daniel Dunbar]

> On Oct 29, 2016, at 7:22 AM, Anton Bronnikov <anton.bronnikov at me.com> wrote:
> 
> Thanks, Daniel.
> 
> Yes, on Oct-27 snapshot `Swift version 3.0-dev (LLVM b52fce3ab4, Clang 4edf31e82f, Swift bf2de4a41c)` if I build with `swift build --enable-new-resolver` then I do get the expected behaviour.  Building with usual `swift build` gets me an old - wrong - one.
> 
> It’s an experimental feature at the moment, right (e.g. I can not invoke `swift package fetch --enable-new-resolver`).

You should be able to use it almost everywhere, but yes it isn't on by default because there are a couple pieces not done.

>  Will it be in 3.1?

We are working to switch over to it ASAP, but I don't know exactly when that will happen. I hope w/in a month or two.

 - Daniel

> 
> Thank you.
> Cheers,
> Anton
> 
>> On 29 Oct 2016, at 00:18, Daniel Dunbar <daniel_dunbar at apple.com> wrote:
>> 
>> This sounds like a bug to me, I suspect that the current code isn't causing the submodule to update appropriately.
>> 
>> If you have a working example, can you try using the latest OSS snapshot from swift.org, and running:
>> swift package reset
>> swift build --enable-new-resolver
>> and seeing if you get the behavior you expect?
>> 
>> - Daniel
>> 
>>> On Oct 28, 2016, at 1:53 PM, Anton Bronnikov via swift-users <swift-users at swift.org> wrote:
>>> 
>>> Hi,
>>> 
>>> I have a question whether what I observe is by-design, a bug, or not yet fully implemented feature in Swift Package Manager.
>>> 
>>> - Let’s say, I have a C repository with some library, and it has two versions tagged, namely 0.0.1 and 0.0.2.
>>> - Then I have a Swift repository that includes the above as a submodule, provides necessary files and exports C functionality into Swift.  This one also has two versions tagged, 0.0.1 and 0.0.2, each matching corresponding version within C repository.
>>> - Finally, I have an application in Swift, that uses the wrapper package as a dependency and specifies 0.0.1 as the desired version.
>>> 
>>> Normally, I would expect that `swift build` would have PM to check out 0.0.1/0.0.1 versions of the repositories (SwiftWrapper/CLibrary).  However, in fact what I get is 0.0.1/0.0.2 (in other words, I get the right - older - version of the wrapper package, but wrong - new - version of the C submodule).
>>> 
>>> The use case is to “escort” a C library that is being continuously developed and used as such (e.g. in Linux community) with its Swift bridge without having to copy-paste the sources from the original repo into the mirror (so that the Swift wrapper would only provide the Package.swift, public header file, and possible a modulemap).
>>> 
>>> If there are other (better) way to do this, I will be glad to hear.
>>> 
>>> Thanks for the help.
>>> Cheers,
>>> Anton
>>> 
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>> 
>