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Date: Sun, 7 Oct 2012 02:16:48 +0100
From: Anil Madhavapeddy <anil@recoil.org>
To: Malcolm Matalka <mmatalka@gmail.com>
Cc: caml-list@inria.fr
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User-Agent: Mutt/1.5.21 (2010-09-15)
Subject: Re: [Caml-list] opam update failing

On Sat, Oct 06, 2012 at 09:57:34PM +0200, Malcolm Matalka wrote:
> Hello!  I did an opam update and after printing a list of packages
> that need upgrading I get:
> 
> ...
> - ulex.1.1
>  - variantslib.108.00.02
>  - zed.1.2
> File /home/mmatalka/.opam/opam/ANSITerminal.0.6.opam: Bad format!
> Expecting list or list-list, got list({optio
> n(list({string("rm") string("setup.ml")}),{string("%{ocaml-version}%")
> symbol(=) string("4.00.0")}) option(lis
> t({string("oasis") string("setup")}),{string("%{ocaml-version}%")
> symbol(=) string("4.00.0")}) list({string("o
> caml") string("setup.ml") string("-configure") string("--prefix")
> string("%{prefix}%")}) list({string("ocaml")
>  string("setup.ml") string("-build")}) list({string("ocaml")
> string("setup.ml") string("-install")})})
>   'opam update' failed
> 
> and opam upgrade fails.  Did a badly formated package sneak in somehow?

OPAM is still being hacked on pretty rapidly (although its getting very
stable in recent days!). The format of the repository changed between 0.6
and 0.7 to improve the constraint system, and so older clients wont
interoperate.  Very recent OPAMs have a version check on the repository
also, so that they can detect future changes.

For immediate use, do not use the OPAM master branch as it is in the
middle of a refactoring, and stick to the tagged released versions instead
(0.7.5 works for me). I've just setup a Jenkins autobuilder which is
continuously building all the OPAM and packages under various operating
systems. I'll publish the build logs such as soon as I figure out how to
convince the Jenkins plugin API to give me a report in the right form...

-- 
Anil Madhavapeddy                                 http://anil.recoil.org