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29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
108 lines
2.6 KiB
Nix
108 lines
2.6 KiB
Nix
# Module for MiniDLNA, a simple DLNA server.
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{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.minidlna;
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port = 8200;
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in
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{
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###### interface
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options = {
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services.minidlna.enable = mkOption {
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type = types.bool;
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default = false;
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description =
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''
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Whether to enable MiniDLNA, a simple DLNA server. It serves
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media files such as video and music to DLNA client devices
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such as televisions and media players.
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'';
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};
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services.minidlna.mediaDirs = mkOption {
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type = types.listOf types.string;
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default = [];
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example = [ "/data/media" "V,/home/alice/video" ];
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description =
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''
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Directories to be scanned for media files. The prefixes
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<literal>A,</literal>, <literal>V,</literal> and
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<literal>P,</literal> restrict a directory to audio, video
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or image files. The directories must be accessible to the
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<literal>minidlna</literal> user account.
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'';
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};
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services.minidlna.config = mkOption {
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type = types.lines;
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description = "The contents of MiniDLNA's configuration file.";
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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services.minidlna.config =
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''
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port=${toString port}
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friendly_name=NixOS Media Server
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db_dir=/var/cache/minidlna
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log_dir=/var/log/minidlna
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inotify=yes
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${concatMapStrings (dir: ''
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media_dir=${dir}
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'') cfg.mediaDirs}
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'';
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users.extraUsers.minidlna = {
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description = "MiniDLNA daemon user";
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group = "minidlna";
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uid = config.ids.uids.minidlna;
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};
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users.extraGroups.minidlna.gid = config.ids.gids.minidlna;
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systemd.services.minidlna =
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{ description = "MiniDLNA Server";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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preStart =
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''
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mkdir -p /var/cache/minidlna /var/log/minidlna /run/minidlna
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chown minidlna /var/cache/minidlna /var/log/minidlna /run/minidlna
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'';
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# FIXME: log through the journal rather than
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# /var/log/minidlna. The -d flag does that, but also raises
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# the log level to debug...
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serviceConfig =
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{ User = "minidlna";
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Group = "nogroup";
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PermissionsStartOnly = true;
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Type = "forking";
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PIDFile = "/run/minidlna/pid";
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ExecStart =
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"@${pkgs.minidlna}/sbin/minidlna minidlna -P /run/minidlna/pid" +
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" -f ${pkgs.writeText "minidlna.conf" cfg.config}";
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};
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};
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};
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}
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