32 lines
1.3 KiB
Nix
32 lines
1.3 KiB
Nix
{
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lib,
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config,
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...
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}: let
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inherit (lib) lists mapAttrsToList;
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inherit (lib.attrsets) foldAttrs concatMapAttrs;
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inherit (lib.asserts) assertMsg;
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inherit (builtins) elem;
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hostmap = import ./hostmap.nix;
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myhostName = config.networking.hostName;
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# We replace our own ip with 127.0.0.1 in /etc/hosts
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# To turn the hostmap around suitable for networking.hosts the following simple code almost works
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# concatMapAttrs (hostname: ipData: { ${ipData.ipv4} = [hostname]; }) hostmap
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# but breaks as soon as we want to map two different names to the same ip.
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# So the code looks uglier than one would expect.
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globalhosts = foldAttrs (a: b: a ++ b) [] (mapAttrsToList (hostname: ipData: {${ipData.ipv4} = [hostname];}) hostmap);
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myhosts = concatMapAttrs (ip: hosts:
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if (elem myhostName hosts)
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# nixos maps the hostname to the loopback 127.0.0.2 by default, so we exclude it here.
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# there is also a default localhost to 127.0.0.1 in place
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then {"127.0.0.1" = lists.filter (x: x != myhostName) hosts;}
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else {${ip} = hosts;})
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globalhosts;
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myIp = assert (assertMsg (hostmap ? ${myhostName}.ipv4) "${myhostName} has no ip configured in nixos/roles/hostmap.nix"); hostmap.${myhostName}.ipv4;
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in {
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imports = [
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../modules/vmNetwork.nix
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];
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networking.hosts = myhosts;
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vmNetwork.ipv4 = myIp;
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}
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