avahi: Never set host-name' to the empty string in
avahi-daemon.conf'.
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@ -11,7 +11,13 @@ let
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avahiDaemonConf = with cfg; pkgs.writeText "avahi-daemon.conf" ''
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[server]
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host-name=${hostName}
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${# Users can set `networking.hostName' to the empty string, when getting
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# a host name from DHCP. In that case, let Avahi take whatever the
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# current host name is; setting `host-name' to the empty string in
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# `avahi-daemon.conf' would be invalid.
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if hostName != ""
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then "host-name=${hostName}"
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else ""}
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browse-domains=${concatStringsSep ", " browseDomains}
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use-ipv4=${if ipv4 then "yes" else "no"}
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use-ipv6=${if ipv6 then "yes" else "no"}
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