Re: [Caml-list] Is it possible to have a common download cache for serval opam installations

[Anil Madhavapeddy <anil@recoil.org>]

Dear Michael,

If you’re on opam2, you can use the “archive-mirrors” field in your opam .config file to specify an alternative location to look for download files in.  The opam CI, for example, does something like:

    echo 'archive-mirrors: [ "file:///home/opam/opam-repository/cache" ]' >> /home/opam/.opam/config

and the contents of /home/opam/opam-repository/cache are created via “opam admin cache”.

Hope that helps,
Anil

> On 25 Apr 2019, at 17:54, Soegtrop, Michael <michael.soegtrop@intel.com> wrote:
> 
> Dear Opam Team,
>  
> I am working on scripts to automatically setup a Cygwin MinGW cross based development environment for Coq developers on Windows and for testing these scripts I have to reinstall Cygwin and opam frequently. I wonder if I could spare the downloads by specifying a common download cache folder somewhere outside of my Cygwin and .opam folders. Is there an option for this or could I e.g. symlink the download folder somewhere or does opam keep and index of what is in the download cache folder so that sharing won’t work?
>  
> Best regards,
>  
> Michael
> Intel Deutschland GmbH
> Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany
> Tel: +49 89 99 8853-0, www.intel.de
> Managing Directors: Christin Eisenschmid, Gary Kershaw
> Chairperson of the Supervisory Board: Nicole Lau
> Registered Office: Munich
> Commercial Register: Amtsgericht Muenchen HRB 186928
>