[opam-devel] opam getting compiler version wrong

[Anil Madhavapeddy]

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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