don't add minor version qualifiers for artefacts aimed at Scala 2.10 and above about shapeless HOT 7 CLOSED

Unfortunately we have to aim at 2.10.2 and above ... we depend on fixes to implicit macros which only arrived in 2.10.2. I'm open to suggestions, but I think the status quo is the best we can do.

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The qualifier in the artefact is not really a means of specifying some minimum supported version though. It is there to specify that the artefact was compiled against that series of Scala – and in 2.10 they warrant some kind of backwards binary compatibility between the whole series. Having it as a bespoke and de-facto dependency management scheme unfortunately complicates and breaks other things.

In our particular case, specs2 2.3.3 brings in shapeless_2.10.2 2.0 but we have a project level dependency on shapeless_2.10 1.2.4 which leads to the above error.

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I understand the problem, but I don't know how to solve it. Do you have a suggestion?

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I'd just make it 2.10, you can't always enforce all the things. I'd say
that 2.10.1 users will find out pretty quickly that it doesn't work, and
I'd wager there won't be that many anyway. Upgrading to latest scala
version is pretty painless and usually worthwhile.

On 14 November 2013 09:04, Miles Sabin [email protected] wrote:

I understand the problem, but I don't know how to solve it. Do you have a
suggestion?

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/63#issuecomment-28438606
.

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Doing the wrong thing without warning at compile or runtime is a pretty serious thing not to enforce IMO. I've just published a build explicitly for 2.10.3 ... does that and the changes that @retronym has just made to the Specs 2 build (retronym/specs2@ec0ef3b#diff-798d1bfac5c6765ba2f0c34e37c073edR122) go some way towards mitigating this for you?

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In our particular case, specs2 2.3.3 brings in shapeless_2.10.2 2.0 but we have a project level dependency on shapeless_2.10 1.2.4 which leads to the above error.

How is that (two different versions of shapeless together) going to work?

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Closing this now. Nobody managed to persuade me that I wasn't doing the right thing here, and it's becoming increasingly irrelevant as people move to Scala 2.11.x.

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