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nzbget.service override nzbget.conf broken paths with current derivation

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This commit is contained in:
Christopher Singley 2017-10-29 19:37:56 -05:00
parent 14291c2723
commit b2c2944998
1 changed files with 32 additions and 15 deletions
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47
nixos/modules/services/misc/nzbget.nix
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@ -4,9 +4,7 @@ with lib;
let let
cfg = config.services.nzbget; cfg = config.services.nzbget;
nzbget = pkgs.nzbget; nzbget = pkgs.nzbget; in {
in
{
options = { options = {
services.nzbget = { services.nzbget = {
enable = mkEnableOption "NZBGet"; enable = mkEnableOption "NZBGet";
@ -42,21 +40,41 @@ in
p7zip p7zip
]; ];
preStart = '' preStart = ''
test -d /var/lib/nzbget || { datadir=/var/lib/nzbget
echo "Creating nzbget state directoy in /var/lib/" cfgtemplate=${cfg.package}/share/nzbget/nzbget.conf
mkdir -p /var/lib/nzbget test -d $datadir || {
echo "Creating nzbget data directory in $datadir"
mkdir -p $datadir
} }
test -f /var/lib/nzbget/nzbget.conf || { test -f $configfile || {
echo "nzbget.conf not found. Copying default config to /var/lib/nzbget/nzbget.conf" echo "nzbget.conf not found. Copying default config $cfgtemplate to $configfile"
cp ${cfg.package}/share/nzbget/nzbget.conf /var/lib/nzbget/nzbget.conf cp $cfgtemplate $configfile
echo "Setting file mode of nzbget.conf to 0700 (needs to be written and contains plaintext credentials)" echo "Setting $configfile permissions to 0700 (needs to be written and contains plaintext credentials)"
chmod 0700 /var/lib/nzbget/nzbget.conf chmod 0700 $configfile
echo "Setting temporary \$MAINDIR variable in default config required in order to allow nzbget to complete initial start" echo "Setting temporary \$MAINDIR variable in default config required in order to allow nzbget to complete initial start"
echo "Remember to change this to a proper value once NZBGet startup has been completed" echo "Remember to change this to a proper value once NZBGet startup has been completed"
sed -i -e 's/MainDir=.*/MainDir=\/tmp/g' /var/lib/nzbget/nzbget.conf sed -i -e 's/MainDir=.*/MainDir=\/tmp/g' $configfile
} }
echo "Ensuring proper ownership of /var/lib/nzbget (${cfg.user}:${cfg.group})." echo "Ensuring proper ownership of $datadir (${cfg.user}:${cfg.group})."
chown -R ${cfg.user}:${cfg.group} /var/lib/nzbget chown -R ${cfg.user}:${cfg.group} $datadir
'';
script = ''
configfile=/var/lib/nzbget/nzbget.conf
args="--daemon --configfile $configfile"
# The script in preStart (above) copies nzbget's config template to datadir on first run, containing paths that point to the nzbget derivation installed at the time.
# These paths break when nzbget is upgraded & the original derivation is garbage collected. If such broken paths are found in the config file, override them to point to
# the currently installed nzbget derivation.
cfgfallback () {
local hit=`grep -Po "(?<=^$1=).*+" "$configfile" | sed 's/[ \t]*$//'` # Strip trailing whitespace
( test $hit && test -e $hit ) || {
echo "In $configfile, valid $1 not found; falling back to $1=$2"
args+=" -o $1=$2"
}
}
cfgfallback ConfigTemplate ${cfg.package}/share/nzbget/nzbget.conf
cfgfallback WebDir ${cfg.package}/share/nzbget/webui
${cfg.package}/bin/nzbget $args
''; '';
serviceConfig = { serviceConfig = {
@ -64,7 +82,6 @@ in
User = cfg.user; User = cfg.user;
Group = cfg.group; Group = cfg.group;
PermissionsStartOnly = "true"; PermissionsStartOnly = "true";
ExecStart = "${cfg.package}/bin/nzbget --daemon --configfile /var/lib/nzbget/nzbget.conf";
Restart = "on-failure"; Restart = "on-failure";
}; };
}; };