dotfiles/nixos/boxes/foureighty/tailscale-foureighty.nix

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{ config, pkgs, inputs, lib, ... }:
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let
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tailscale = inputs.nixpkgs-nixos-unstable.legacyPackages."x86_64-linux".tailscale;
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in
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{
systemd.services.tailscale-autoconnect = {
description = "Automatic connection to Tailscale";
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# make sure tailscale is running before trying to connect to tailscale
after = [ "network-pre.target" "tailscale.service" ];
wants = [ "network-pre.target" "tailscale.service" ];
wantedBy = [ "multi-user.target" ];
# set this service as a oneshot job
serviceConfig.Type = "oneshot";
# have the job run this shell script
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script = ''
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# wait for tailscaled to settle
sleep 2
# check if we are already authenticated to tailscale
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status="$(${tailscale}/bin/tailscale status -json | ${pkgs.jq}/bin/jq -r .BackendState)"
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if [ $status = "Running" ]; then # if so, then do nothing
exit 0
fi
# otherwise authenticate with tailscale
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${tailscale}/bin/tailscale up -authkey tskey-kdLez34CNTRL-ZYLukvuu2zdDeywb4N8wVU
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'';
};
}