What do you mean with "only get installed at the end"?
Also, networking.hostName should work, the whole config gets evaluated "at
once". There's no "running" in Nix, only side-effects of evaluation.
Wout.
On Fri Jan 23 2015 at 7:45:38 PM Jeff Johnson <jef...@gmail.com> wrote:
> Hi all! I'm trying to set up tarsnap on nixos. This is my tarsnap.nix so
> far:
>
> config:
>
> let
> keySrc = ../rawpriv/tarsnap;
> cacheDir = "/var/cache/tarsnap";
>
> rcSrc = builtins.toFile "tarsnaprc" ''
> aggressive-networking # TODO is this a good idea?
> humanize-numbers
> '';
>
> script = homeDir:
> let
> keyDst = "${homeDir}/tarsnap.key";
> rcDst = "${homeDir}/.tarsnaprc";
> in ''
> echo "installing ${keyDst}" ; install -m400
> ${keySrc}/`hostname`.key ${keyDst}
> echo "installing ${rcDst}" ; ln -fs ${rcSrc} ${rcDst}
> echo "installing ${cacheDir}"; mkdir -p ${cacheDir}
> '';
>
> in {
> system.activationScripts = { tarsnap = script "/root"; };
> services.tarsnap = {
> inherit config;
> enable = true;
> keyfile = keyDst;
> cachedir = cacheDir;
> };
> }
>
> It works except that the keyfile and cachedir only get installed at
> the end, so nix complains that they don't exist unless I create them
> manually first. Is there a way to make the script run earlier? And
> another possibly-related question: is there a way to find out the
> hostname? I can't just do `networking.hostName` because that's set in
> the top-level config after this module runs. Do I just pass it as an
> argument? Thanks
> Jeff
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> nix-dev@lists.science.uu.nl
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>
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