63 lines
1.9 KiB
Nix
63 lines
1.9 KiB
Nix
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{ depot, config, lib, pkgs, ... }:
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let
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cfg = config.services.depot.irccat;
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description = "irccat - forward messages to IRC";
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# irccat expects to read its configuration from the *current
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# directory*, and its configuration contains secrets.
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#
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# To make this work we construct the JSON configuration file and
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# then recursively merge it with an on-disk secret using jq on
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# service launch.
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configJson = pkgs.writeText "irccat.json" (builtins.toJSON cfg.config);
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# Right now, merging configuration file with secrets and running the main
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# application needs to happen both in ExecStart=, due to
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# https://github.com/systemd/systemd/issues/19604#issuecomment-989279884
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mergeAndLaunch = pkgs.writeShellScript "merge-irccat-config" ''
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if [ ! -f "$CREDENTIALS_DIRECTORY/secrets" ]; then
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echo "irccat secrets file is missing"
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exit 1
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fi
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# jq's * is the recursive merge operator
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${pkgs.jq}/bin/jq -s '.[0] * .[1]' ${configJson} "$CREDENTIALS_DIRECTORY/secrets" \
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> /var/lib/irccat/irccat.json
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exec ${depot.third_party.irccat}/bin/irccat
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'';
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in
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{
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options.services.depot.irccat = {
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enable = lib.mkEnableOption description;
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config = lib.mkOption {
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type = lib.types.attrs; # varying value types
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description = "Configuration structure (unchecked!)";
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};
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secretsFile = lib.mkOption {
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type = lib.types.str;
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description = "Path to the secrets file to be merged";
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default = "/run/agenix/irccat";
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};
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};
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config = lib.mkIf cfg.enable {
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systemd.services.irccat = {
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inherit description;
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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ExecStart = "${mergeAndLaunch}";
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DynamicUser = true;
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StateDirectory = "irccat";
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WorkingDirectory = "/var/lib/irccat";
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LoadCredential = "secrets:${cfg.secretsFile}";
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Restart = "always";
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};
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};
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};
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}
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