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786e9711f5
previous mkDefault did not work as expected, as it did not overwrite the original submodule's defaults when the user did not specify any custom options at all.
228 lines
8.5 KiB
Nix
228 lines
8.5 KiB
Nix
{ config, lib, pkgs, services, ... }:
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with lib;
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let
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cfg = config.services.piwik;
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user = "piwik";
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dataDir = "/var/lib/${user}";
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pool = user;
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# it's not possible to use /run/phpfpm/${pool}.sock because /run/phpfpm/ is root:root 0770,
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# and therefore is not accessible by the web server.
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phpSocket = "/run/phpfpm-${pool}.sock";
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phpExecutionUnit = "phpfpm-${pool}";
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databaseService = "mysql.service";
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in {
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options = {
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services.piwik = {
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# NixOS PR for database setup: https://github.com/NixOS/nixpkgs/pull/6963
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# piwik issue for automatic piwik setup: https://github.com/piwik/piwik/issues/10257
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# TODO: find a nice way to do this when more NixOS MySQL and / or piwik automatic setup stuff is implemented.
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable piwik web analytics with php-fpm backend.
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Either the nginx option or the webServerUser option is mandatory.
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'';
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};
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webServerUser = mkOption {
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type = types.nullOr types.str;
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default = null;
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example = "lighttpd";
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description = ''
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Name of the web server user that forwards requests to the ${phpSocket} fastcgi socket for piwik if the nginx
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option is not used. Either this option or the nginx option is mandatory.
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If you want to use another webserver than nginx, you need to set this to that server's user
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and pass fastcgi requests to `index.php` and `piwik.php` to this socket.
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'';
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};
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phpfpmProcessManagerConfig = mkOption {
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type = types.str;
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default = ''
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; default phpfpm process manager settings
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pm = dynamic
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pm.max_children = 75
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pm.start_servers = 10
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pm.min_spare_servers = 5
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pm.max_spare_servers = 20
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pm.max_requests = 500
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; log worker's stdout, but this has a performance hit
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catch_workers_output = yes
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'';
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description = ''
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Settings for phpfpm's process manager. You might need to change this depending on the load for piwik.
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'';
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};
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nginx = mkOption {
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type = types.nullOr (types.submodule (
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recursiveUpdate
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(import ../web-servers/nginx/vhost-options.nix { inherit config lib; })
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{
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# enable encryption by default,
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# as sensitive login and piwik data should not be transmitted in clear text.
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options.forceSSL.default = true;
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options.enableACME.default = true;
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}
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)
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);
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default = null;
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example = {
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serverName = "stats.$\{config.networking.hostName\}";
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enableACME = false;
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};
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description = ''
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With this option, you can customize an nginx virtualHost which already has sensible defaults for piwik.
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Either this option or the webServerUser option is mandatory.
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Set this to {} to just enable the virtualHost if you don't need any customization.
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If enabled, then by default, the serverName is piwik.$\{config.networking.hostName\}, SSL is active,
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and certificates are acquired via ACME.
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If this is set to null (the default), no nginx virtualHost will be configured.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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warnings = mkIf (cfg.nginx != null && cfg.webServerUser != null) [
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"If services.piwik.nginx is set, services.piwik.nginx.webServerUser is ignored and should be removed."
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];
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assertions = [ {
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assertion = cfg.nginx != null || cfg.webServerUser != null;
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message = "Either services.piwik.nginx or services.piwik.nginx.webServerUser is mandatory";
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}];
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users.extraUsers.${user} = {
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isSystemUser = true;
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createHome = true;
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home = dataDir;
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group = user;
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};
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users.extraGroups.${user} = {};
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systemd.services.piwik_setup_update = {
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# everything needs to set up and up to date before piwik php files are executed
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requiredBy = [ "${phpExecutionUnit}.service" ];
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before = [ "${phpExecutionUnit}.service" ];
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# the update part of the script can only work if the database is already up and running
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requires = [ databaseService ];
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after = [ databaseService ];
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path = [ pkgs.piwik ];
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serviceConfig = {
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Type = "oneshot";
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User = user;
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# hide especially config.ini.php from other
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UMask = "0007";
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Environment = "PIWIK_USER_PATH=${dataDir}";
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# chown + chmod in preStart needs root
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PermissionsStartOnly = true;
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};
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# correct ownership and permissions in case they're not correct anymore,
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# e.g. after restoring from backup or moving from another system.
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# Note that ${dataDir}/config/config.ini.php might contain the MySQL password.
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preStart = ''
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chown -R ${user}:${user} ${dataDir}
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chmod -R ug+rwX,o-rwx ${dataDir}
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'';
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script = ''
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# Use User-Private Group scheme to protect piwik data, but allow administration / backup via piwik group
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# Copy config folder
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chmod g+s "${dataDir}"
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cp -r "${pkgs.piwik}/config" "${dataDir}/"
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chmod -R u+rwX,g+rwX,o-rwx "${dataDir}"
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# check whether user setup has already been done
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if test -f "${dataDir}/config/config.ini.php"; then
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# then execute possibly pending database upgrade
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piwik-console core:update --yes
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fi
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'';
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};
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systemd.services.${phpExecutionUnit} = {
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# stop phpfpm on package upgrade, do database upgrade via piwik_setup_update, and then restart
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restartTriggers = [ pkgs.piwik ];
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# stop config.ini.php from getting written with read permission for others
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serviceConfig.UMask = "0007";
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};
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services.phpfpm.poolConfigs = let
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# workaround for when both are null and need to generate a string,
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# which is illegal, but as assertions apparently are being triggered *after* config generation,
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# we have to avoid already throwing errors at this previous stage.
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socketOwner = if (cfg.nginx != null) then config.services.nginx.user
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else if (cfg.webServerUser != null) then cfg.webServerUser else "";
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in {
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${pool} = ''
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listen = "${phpSocket}"
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listen.owner = ${socketOwner}
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listen.group = root
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listen.mode = 0600
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user = ${user}
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env[PIWIK_USER_PATH] = ${dataDir}
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${cfg.phpfpmProcessManagerConfig}
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'';
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};
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services.nginx.virtualHosts = mkIf (cfg.nginx != null) {
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# References:
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# https://fralef.me/piwik-hardening-with-nginx-and-php-fpm.html
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# https://github.com/perusio/piwik-nginx
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"${user}.${config.networking.hostName}" = mkMerge [ cfg.nginx {
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# don't allow to override the root easily, as it will almost certainly break piwik.
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# disadvantage: not shown as default in docs.
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root = mkForce "${pkgs.piwik}/share";
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# define locations here instead of as the submodule option's default
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# so that they can easily be extended with additional locations if required
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# without needing to redefine the piwik ones.
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# disadvantage: not shown as default in docs.
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locations."/" = {
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index = "index.php";
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};
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# allow index.php for webinterface
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locations."= /index.php".extraConfig = ''
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fastcgi_pass unix:${phpSocket};
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'';
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# allow piwik.php for tracking
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locations."= /piwik.php".extraConfig = ''
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fastcgi_pass unix:${phpSocket};
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'';
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# Any other attempt to access any php files is forbidden
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locations."~* ^.+\.php$".extraConfig = ''
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return 403;
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'';
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# Disallow access to unneeded directories
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# config and tmp are already removed
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locations."~ ^/(?:core|lang|misc)/".extraConfig = ''
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return 403;
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'';
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# Disallow access to several helper files
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locations."~* \.(?:bat|git|ini|sh|txt|tpl|xml|md)$".extraConfig = ''
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return 403;
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'';
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# No crawling of this site for bots that obey robots.txt - no useful information here.
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locations."= /robots.txt".extraConfig = ''
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return 200 "User-agent: *\nDisallow: /\n";
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'';
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# let browsers cache piwik.js
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locations."= /piwik.js".extraConfig = ''
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expires 1M;
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'';
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}];
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};
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};
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meta = {
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doc = ./piwik-doc.xml;
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maintainers = with stdenv.lib.maintainers; [ florianjacob ];
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};
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}
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