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Simplify (and fix) settings for transmission module.

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This commit is contained in:
koral 2015-02-23 17:43:10 +00:00
parent 519c696bcf
commit c1cefa1a58
1 changed files with 5 additions and 17 deletions
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22
nixos/modules/services/torrent/transmission.nix
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@ -9,28 +9,16 @@ let
homeDir = "/var/lib/transmission";
downloadDir = "${homeDir}/Downloads";
incompleteDir = "${homeDir}/.incomplete";
settingsDir = "${homeDir}/.config/transmission-daemon";
settingsFile = "${settingsDir}/settings.json";
settingsFile = pkgs.writeText "settings.json" (builtins.toJSON fullSettings);
# Strings must be quoted, ints and bools must not (for settings.json).
toOption = x:
if x == true then "true"
else if x == false then "false"
else if isInt x then toString x
else toString ''\"${x}\"'';
# All lines in settings.json end with a ',' (comma), except for the last
# line. This is standard JSON. But a comma can also appear *inside* some
# fields, notably the "rpc-whitelist" field. This is difficult to handle in
# sed so we simply ignore it and say that if you want to change the option at
# the last line of settings.json, you have to do it manually. At this time of
# writing, the last option is "utp-enable":true.
attrsToSedArgs = as:
concatStrings (concatLists (mapAttrsToList (name: value:
#map (x: '' -e 's=\(\"${name}\":\)[^,]*\(.*\)=\1 ${toOption x}\2=' '') # breaks if comma inside value field
map (x: '' -e 's=\(\"${name}\":\).*=\1 ${toOption x},=' '') # always append ',' (breaks last line in settings.json)
(if isList value then value else [value]))
as));
else toString ''"${x}"'';
# for users in group "transmission" to have access to torrents
fullSettings = cfg.settings // { umask = 2; };
@ -73,7 +61,7 @@ in
boolean values must not.
See https://trac.transmissionbt.com/wiki/EditConfigFiles for
documentation and/or look at ${settingsFile}.
documentation.
'';
};
@ -95,7 +83,7 @@ in
# 1) Only the "transmission" user and group have access to torrents.
# 2) Optionally update/force specific fields into the configuration file.
serviceConfig.ExecStartPre = ''
${pkgs.stdenv.shell} -c "chmod 770 ${homeDir} && mkdir -p ${settingsDir} ${downloadDir} ${incompleteDir} && ${pkgs.transmission}/bin/transmission-daemon -d |& sed ${attrsToSedArgs fullSettings} > ${settingsFile}.tmp && mv ${settingsFile}.tmp ${settingsFile}"
${pkgs.stdenv.shell} -c "chmod 770 ${homeDir} && mkdir -p ${settingsDir} ${downloadDir} ${incompleteDir} && rm -f ${settingsDir}/settings.json && cp -f ${settingsFile} ${settingsDir}/settings.json"
'';
serviceConfig.ExecStart = "${pkgs.transmission}/bin/transmission-daemon -f --port ${toString config.services.transmission.port}";
serviceConfig.ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";