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|
{ config, lib, pkgs, ... }:
# TODO multiple users
# TODO inform about unused caches
# cache = url: "${cfg.dataDir}/.urlwatch/cache/${hashString "sha1" url}"
with import <stockholm/lib>;
let
cfg = config.krebs.urlwatch;
# TODO assert sendmail's existence
out = {
options.krebs.urlwatch = api;
config = lib.mkIf cfg.enable imp;
};
api = {
enable = mkEnableOption "krebs.urlwatch";
dataDir = mkOption {
type = types.str;
default = "/var/lib/urlwatch";
description = ''
Directory where the urlwatch service should store its state.
'';
};
from = mkOption {
type = types.str;
default = "${user.name}@${config.networking.hostName}.r";
description = ''
Content of the From: header of the generated mails.
'';
};
# TODO hooks :: attrsOf hook
hooksFile = mkOption {
type = with types; nullOr path;
default = null;
description = ''
File to use as hooks.py module.
'';
};
mailto = mkOption {
type = types.str;
default = config.krebs.build.user.mail;
description = ''
Content of the To: header of the generated mails. [AKA recipient :)]
'';
};
onCalendar = mkOption {
type = types.str;
default = "04:23";
description = ''
Run urlwatch at this interval.
The format is described in systemd.time(7), CALENDAR EVENTS.
'';
};
urls = mkOption {
type = with types; listOf (either str subtypes.job);
default = [];
description = "URL to watch.";
example = [
https://nixos.org/channels/nixos-unstable/git-revision
{ url = http://localhost ; filter = "grep:important.*stuff"; }
];
apply = map (x: getAttr (typeOf x) {
set = x;
string = {
url = x;
filter = null;
};
});
};
verbose = mkOption {
type = types.bool;
default = false;
description = ''
verbose output of urlwatch
'';
};
};
urlsFile = pkgs.writeText "urls"
(concatMapStringsSep "\n---\n"
(x: toJSON (filterAttrs (n: v: n != "_module") x)) cfg.urls);
hooksFile = cfg.hooksFile;
configFile = pkgs.writeText "urlwatch.yaml" (toJSON {
display = {
error = true;
new = true;
unchanged = false;
};
report = {
email = {
enabled = false;
from = "";
html = false;
smtp = {
host = "localhost";
keyring = true;
port = 25;
starttls = true;
};
subject = "{count} changes: {jobs}";
to = "";
};
html.diff = "unified";
stdout = {
color = true;
enabled = true;
};
text = {
details = true;
footer = true;
line_length = 75;
};
};
});
imp = {
systemd.timers.urlwatch = {
wantedBy = [ "timers.target" ];
timerConfig = {
OnCalendar = cfg.onCalendar;
Persistent = "true";
};
};
systemd.services.urlwatch = {
path = with pkgs; [
coreutils
gnused
urlwatch
];
environment = {
HOME = cfg.dataDir;
LC_ALL = "en_US.UTF-8";
LOCALE_ARCHIVE = "${pkgs.glibcLocales}/lib/locale/locale-archive";
SSL_CERT_FILE = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
};
serviceConfig = {
User = user.name;
PermissionsStartOnly = "true";
PrivateTmp = "true";
SyslogIdentifier = "urlwatch";
Type = "oneshot";
ExecStart = pkgs.writeDash "urlwatch" ''
set -euf
cd /tmp
urlwatch \
${optionalString cfg.verbose "-v"} \
--config=${shell.escape configFile} \
${optionalString (hooksFile != null)
"--hooks=${shell.escape hooksFile}"
} \
--urls=${shell.escape urlsFile} \
> changes || :
if test -s changes; then
{
echo Date: $(date -R)
echo From: ${shell.escape cfg.from}
echo Subject: $(
sed -n 's/^\(CHANGED\|ERROR\|NEW\): //p' changes \
| tr '\n' ' '
)
echo To: ${shell.escape cfg.mailto}
echo
cat changes
} | /run/wrappers/bin/sendmail -t
fi
'';
};
};
users.extraUsers = singleton {
inherit (user) name uid;
home = cfg.dataDir;
createHome = true;
};
};
user = rec {
name = "urlwatch";
uid = genid name;
};
subtypes.job = types.submodule {
options = {
url = mkOption {
type = types.str;
};
filter = mkOption {
type = with types; nullOr str; # TODO nullOr subtypes.filter
};
};
};
in out
|
