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nixos: write our hostname to /etc/hosts #18183

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nixos: write our hostname to /etc/hosts #18183

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40 changes: 29 additions & 11 deletions nixos/modules/config/nsswitch.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,22 @@ let
inherit (config.services.samba) nsswins;
ldap = (config.users.ldap.enable && config.users.ldap.nsswitch);

hostArray = with lib; [
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@Mic92 Mic92 Dec 15, 2016 •
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with lib; is unnecessary here.

"files"
"mymachines"
] ++ optionals nssmdns [ "mdns_minimal [!UNAVAIL=return] mdns" ]
++ optionals nsswins [ "wins" ]
++ [ "dns" "myhostname" ];

passwdArray = with lib; [
"files"
] ++ optionals ldap [ "ldap" ]
++ [ "mymachines" ];

shadowArray = with lib; [
"files"
] ++ optionals ldap [ "ldap" ];

in

{
Expand Down Expand Up @@ -39,17 +55,19 @@ in
# Name Service Switch configuration file. Required by the C
# library. !!! Factor out the mdns stuff. The avahi module
# should define an option used by this module.
environment.etc."nsswitch.conf".text =
''
passwd: files ${optionalString ldap "ldap"}
group: files ${optionalString ldap "ldap"}
shadow: files ${optionalString ldap "ldap"}
hosts: files ${optionalString nssmdns "mdns_minimal [NOTFOUND=return]"} dns ${optionalString nssmdns "mdns"} ${optionalString nsswins "wins"} myhostname mymachines
networks: files dns
ethers: files
services: files
protocols: files
'';
environment.etc."nsswitch.conf".text = ''
passwd: ${concatStringsSep " " passwdArray}
group: ${concatStringsSep " " passwdArray}
shadow: ${concatStringsSep " " shadowArray}

hosts: ${concatStringsSep " " hostArray}
networks: files

ethers: files
services: files
protocols: files
rpc: files
'';

# Systemd provides nss-myhostname to ensure that our hostname
# always resolves to a valid IP address. It returns all locally
Expand Down