[opam-devel] opam getting compiler version wrong

[louis.gesbert at ocamlpro.com]

That's not true. opam won't upgrade your repositories implicitely at the 
moment (I am considering it, but am afraid it may lead to more difficult to 
track errors). The only thing it rewrites is opam files found in source trees 
when you pin them.

I will add a warning in opam2 when use of a 1.2 repository is detected.

Best,
Louis Gesbert - OCamlPro

On samedi 10 décembre 2016 21:36:08 CET Drup wrote:
> opam 2.0 upgrades the format automatically when pinning a repository
> with an older opam format.
> 
> Le 10/12/2016 à 21:05, Anil Madhavapeddy a écrit :
> > You can run "opam admin upgrade-format" to upgrade the repository, but I'm
> > not sure of how to convert individual `opam` files.  This seems like it
> > would be useful in order to upgrade working repositories for pinning
> > purposes...
> > 
> > Anil
> > 
> >> On 7 Dec 2016, at 21:52, Ashish Agarwal <agarwal1975 at gmail.com> wrote:
> >> 
> >> Seems the issue is mis-interpretation of a deprecated constraint. I'm
> >> using Jane Street's opam repository [1], which contains constraints
> >> like:
> >> 
> >> available: [ ocaml-version >= "4.03.0" ]
> >> 
> >> After replacing this with a normal constraint in the `depends` field, it
> >> worked fine. Is there a tool to convert old opam files?
> >> 
> >> [1] https://github.com/janestreet/opam-repository
> >> 
> >> 
> >> On Wed, Dec 7, 2016 at 8:04 AM, Ashish Agarwal <agarwal1975 at gmail.com>
> >> wrote: I'm getting this:
> >> 
> >> $ opam install ppx_sexp_conv.114.10+84
> >> [ERROR] ppx_sexp_conv.114.10+84 has unmet availability conditions:
> >> ocaml-version >= "4.03.0"
> >> 
> >> So opam thinks my ocaml version is < 4.03.0, but I'm in a 4.03.0 switch.
> >> I've certainly run "eval `opam config env`". I created a new switch with
> >> 4.03.0 to try it from scratch, but get the same issue.
> >> 
> >> Sanity checks:
> >> 
> >> $ ocaml -version
> >> The OCaml toplevel, version 4.03.0
> >> 
> >> $ opam info ocaml | grep all-installed-versions
> >> all-installed-versions 4.03.0 [4.03.0]  4.04.0 [4.04.0]
> >> 
> >> Incidentally, I'm confused about the output of `opam info ocaml`. I have
> >> 6 switches on this computer. How come only 2 are listed above?
> >> 
> >> $ opam --version
> >> 2.0~alpha5
> >> 
> >> 
> >> _______________________________________________
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> >> opam-devel at lists.ocaml.org
> >> http://lists.ocaml.org/listinfo/opam-devel
> > 
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