577 lines
23 KiB
Nix
577 lines
23 KiB
Nix
{ lib, pkgs, config, ... }:
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with lib;
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let
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cfg = config.services.public-inbox;
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stateDir = "/var/lib/public-inbox";
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gitIni = pkgs.formats.gitIni { listsAsDuplicateKeys = true; };
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iniAtom = elemAt gitIni.type/*attrsOf*/.functor.wrapped/*attrsOf*/.functor.wrapped/*either*/.functor.wrapped 0;
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useSpamAssassin = cfg.settings.publicinboxmda.spamcheck == "spamc" ||
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cfg.settings.publicinboxwatch.spamcheck == "spamc";
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publicInboxDaemonOptions = proto: defaultPort: {
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args = mkOption {
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type = with types; listOf str;
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default = [];
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description = lib.mdDoc "Command-line arguments to pass to {manpage}`public-inbox-${proto}d(1)`.";
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};
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port = mkOption {
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type = with types; nullOr (either str port);
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default = defaultPort;
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description = lib.mdDoc ''
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Listening port.
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Beware that public-inbox uses well-known ports number to decide whether to enable TLS or not.
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Set to null and use `systemd.sockets.public-inbox-${proto}d.listenStreams`
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if you need a more advanced listening.
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'';
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};
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cert = mkOption {
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type = with types; nullOr str;
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default = null;
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example = "/path/to/fullchain.pem";
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description = lib.mdDoc "Path to TLS certificate to use for connections to {manpage}`public-inbox-${proto}d(1)`.";
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};
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key = mkOption {
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type = with types; nullOr str;
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default = null;
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example = "/path/to/key.pem";
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description = lib.mdDoc "Path to TLS key to use for connections to {manpage}`public-inbox-${proto}d(1)`.";
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};
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};
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serviceConfig = srv:
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let proto = removeSuffix "d" srv;
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needNetwork = builtins.hasAttr proto cfg && cfg.${proto}.port == null;
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in {
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serviceConfig = {
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# Enable JIT-compiled C (via Inline::C)
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Environment = [ "PERL_INLINE_DIRECTORY=/run/public-inbox-${srv}/perl-inline" ];
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# NonBlocking is REQUIRED to avoid a race condition
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# if running simultaneous services.
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NonBlocking = true;
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#LimitNOFILE = 30000;
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User = config.users.users."public-inbox".name;
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Group = config.users.groups."public-inbox".name;
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RuntimeDirectory = [
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"public-inbox-${srv}/perl-inline"
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];
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RuntimeDirectoryMode = "700";
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# This is for BindPaths= and BindReadOnlyPaths=
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# to allow traversal of directories they create inside RootDirectory=
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UMask = "0066";
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StateDirectory = ["public-inbox"];
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StateDirectoryMode = "0750";
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WorkingDirectory = stateDir;
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BindReadOnlyPaths = [
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"/etc"
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"/run/systemd"
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"${config.i18n.glibcLocales}"
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] ++
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mapAttrsToList (name: inbox: inbox.description) cfg.inboxes ++
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# Without confinement the whole Nix store
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# is made available to the service
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optionals (!config.systemd.services."public-inbox-${srv}".confinement.enable) [
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"${pkgs.dash}/bin/dash:/bin/sh"
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builtins.storeDir
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];
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# The following options are only for optimizing:
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# systemd-analyze security public-inbox-'*'
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AmbientCapabilities = "";
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CapabilityBoundingSet = "";
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# ProtectClock= adds DeviceAllow=char-rtc r
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DeviceAllow = "";
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LockPersonality = true;
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MemoryDenyWriteExecute = true;
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NoNewPrivileges = true;
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PrivateNetwork = mkDefault (!needNetwork);
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ProcSubset = "pid";
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ProtectClock = true;
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ProtectHome = mkDefault true;
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ProtectHostname = true;
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ProtectKernelLogs = true;
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ProtectProc = "invisible";
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#ProtectSystem = "strict";
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RemoveIPC = true;
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RestrictAddressFamilies = [ "AF_UNIX" ] ++
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optionals needNetwork [ "AF_INET" "AF_INET6" ];
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RestrictNamespaces = true;
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RestrictRealtime = true;
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RestrictSUIDSGID = true;
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SystemCallFilter = [
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"@system-service"
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"~@aio" "~@chown" "~@keyring" "~@memlock" "~@resources"
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# Not removing @setuid and @privileged because Inline::C needs them.
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# Not removing @timer because git upload-pack needs it.
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];
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SystemCallArchitectures = "native";
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# The following options are redundant when confinement is enabled
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RootDirectory = "/var/empty";
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TemporaryFileSystem = "/";
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PrivateMounts = true;
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MountAPIVFS = true;
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PrivateDevices = true;
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PrivateTmp = true;
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PrivateUsers = true;
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ProtectControlGroups = true;
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ProtectKernelModules = true;
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ProtectKernelTunables = true;
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};
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confinement = {
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# Until we agree upon doing it directly here in NixOS
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# https://github.com/NixOS/nixpkgs/pull/104457#issuecomment-1115768447
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# let the user choose to enable the confinement with:
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# systemd.services.public-inbox-httpd.confinement.enable = true;
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# systemd.services.public-inbox-imapd.confinement.enable = true;
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# systemd.services.public-inbox-init.confinement.enable = true;
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# systemd.services.public-inbox-nntpd.confinement.enable = true;
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#enable = true;
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mode = "full-apivfs";
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# Inline::C needs a /bin/sh, and dash is enough
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binSh = "${pkgs.dash}/bin/dash";
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packages = [
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pkgs.iana-etc
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(getLib pkgs.nss)
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pkgs.tzdata
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];
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};
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};
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in
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{
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options.services.public-inbox = {
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enable = mkEnableOption (lib.mdDoc "the public-inbox mail archiver");
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package = mkOption {
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type = types.package;
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default = pkgs.public-inbox;
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defaultText = literalExpression "pkgs.public-inbox";
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description = lib.mdDoc "public-inbox package to use.";
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};
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path = mkOption {
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type = with types; listOf package;
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default = [];
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example = literalExpression "with pkgs; [ spamassassin ]";
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description = lib.mdDoc ''
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Additional packages to place in the path of public-inbox-mda,
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public-inbox-watch, etc.
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'';
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};
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inboxes = mkOption {
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description = lib.mdDoc ''
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Inboxes to configure, where attribute names are inbox names.
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'';
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default = {};
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type = types.attrsOf (types.submodule ({name, ...}: {
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freeformType = types.attrsOf iniAtom;
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options.inboxdir = mkOption {
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type = types.str;
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default = "${stateDir}/inboxes/${name}";
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description = lib.mdDoc "The absolute path to the directory which hosts the public-inbox.";
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};
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options.address = mkOption {
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type = with types; listOf str;
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example = "example-discuss@example.org";
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description = lib.mdDoc "The email addresses of the public-inbox.";
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};
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options.url = mkOption {
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type = with types; nullOr str;
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default = null;
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example = "https://example.org/lists/example-discuss";
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description = lib.mdDoc "URL where this inbox can be accessed over HTTP.";
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};
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options.description = mkOption {
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type = types.str;
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example = "user/dev discussion of public-inbox itself";
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description = lib.mdDoc "User-visible description for the repository.";
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apply = pkgs.writeText "public-inbox-description-${name}";
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};
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options.newsgroup = mkOption {
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type = with types; nullOr str;
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default = null;
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description = lib.mdDoc "NNTP group name for the inbox.";
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};
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options.watch = mkOption {
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type = with types; listOf str;
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default = [];
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description = lib.mdDoc "Paths for {manpage}`public-inbox-watch(1)` to monitor for new mail.";
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example = [ "maildir:/path/to/test.example.com.git" ];
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};
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options.watchheader = mkOption {
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type = with types; nullOr str;
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default = null;
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example = "List-Id:<test@example.com>";
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description = lib.mdDoc ''
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If specified, {manpage}`public-inbox-watch(1)` will only process
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mail containing a matching header.
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'';
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};
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options.coderepo = mkOption {
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type = (types.listOf (types.enum (attrNames cfg.settings.coderepo))) // {
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description = "list of coderepo names";
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};
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default = [];
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description = lib.mdDoc "Nicknames of a 'coderepo' section associated with the inbox.";
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};
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}));
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};
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imap = {
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enable = mkEnableOption (lib.mdDoc "the public-inbox IMAP server");
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} // publicInboxDaemonOptions "imap" 993;
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http = {
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enable = mkEnableOption (lib.mdDoc "the public-inbox HTTP server");
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mounts = mkOption {
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type = with types; listOf str;
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default = [ "/" ];
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example = [ "/lists/archives" ];
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description = lib.mdDoc ''
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Root paths or URLs that public-inbox will be served on.
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If domain parts are present, only requests to those
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domains will be accepted.
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'';
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};
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args = (publicInboxDaemonOptions "http" 80).args;
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port = mkOption {
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type = with types; nullOr (either str port);
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default = 80;
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example = "/run/public-inbox-httpd.sock";
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description = lib.mdDoc ''
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Listening port or systemd's ListenStream= entry
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to be used as a reverse proxy, eg. in nginx:
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`locations."/inbox".proxyPass = "http://unix:''${config.services.public-inbox.http.port}:/inbox";`
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Set to null and use `systemd.sockets.public-inbox-httpd.listenStreams`
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if you need a more advanced listening.
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'';
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};
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};
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mda = {
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enable = mkEnableOption (lib.mdDoc "the public-inbox Mail Delivery Agent");
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args = mkOption {
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type = with types; listOf str;
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default = [];
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description = lib.mdDoc "Command-line arguments to pass to {manpage}`public-inbox-mda(1)`.";
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};
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};
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postfix.enable = mkEnableOption (lib.mdDoc "the integration into Postfix");
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nntp = {
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enable = mkEnableOption (lib.mdDoc "the public-inbox NNTP server");
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} // publicInboxDaemonOptions "nntp" 563;
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spamAssassinRules = mkOption {
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type = with types; nullOr path;
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default = "${cfg.package.sa_config}/user/.spamassassin/user_prefs";
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defaultText = literalExpression "\${cfg.package.sa_config}/user/.spamassassin/user_prefs";
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description = lib.mdDoc "SpamAssassin configuration specific to public-inbox.";
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};
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settings = mkOption {
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description = lib.mdDoc ''
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Settings for the [public-inbox config file](https://public-inbox.org/public-inbox-config.html).
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'';
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default = {};
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type = types.submodule {
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freeformType = gitIni.type;
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options.publicinbox = mkOption {
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default = {};
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description = lib.mdDoc "public inboxes";
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type = types.submodule {
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freeformType = with types; /*inbox name*/attrsOf (/*inbox option name*/attrsOf /*inbox option value*/iniAtom);
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options.css = mkOption {
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type = with types; listOf str;
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default = [];
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description = lib.mdDoc "The local path name of a CSS file for the PSGI web interface.";
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};
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options.nntpserver = mkOption {
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type = with types; listOf str;
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default = [];
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example = [ "nntp://news.public-inbox.org" "nntps://news.public-inbox.org" ];
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description = lib.mdDoc "NNTP URLs to this public-inbox instance";
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};
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options.wwwlisting = mkOption {
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type = with types; enum [ "all" "404" "match=domain" ];
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default = "404";
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description = lib.mdDoc ''
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Controls which lists (if any) are listed for when the root
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public-inbox URL is accessed over HTTP.
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'';
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};
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};
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};
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options.publicinboxmda.spamcheck = mkOption {
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type = with types; enum [ "spamc" "none" ];
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default = "none";
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description = lib.mdDoc ''
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If set to spamc, {manpage}`public-inbox-watch(1)` will filter spam
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using SpamAssassin.
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'';
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};
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options.publicinboxwatch.spamcheck = mkOption {
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type = with types; enum [ "spamc" "none" ];
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default = "none";
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description = lib.mdDoc ''
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If set to spamc, {manpage}`public-inbox-watch(1)` will filter spam
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using SpamAssassin.
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'';
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};
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options.publicinboxwatch.watchspam = mkOption {
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type = with types; nullOr str;
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default = null;
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example = "maildir:/path/to/spam";
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description = lib.mdDoc ''
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If set, mail in this maildir will be trained as spam and
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deleted from all watched inboxes
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'';
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};
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options.coderepo = mkOption {
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default = {};
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description = lib.mdDoc "code repositories";
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type = types.attrsOf (types.submodule {
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freeformType = types.attrsOf iniAtom;
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options.cgitUrl = mkOption {
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type = types.str;
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description = lib.mdDoc "URL of a cgit instance";
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};
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options.dir = mkOption {
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type = types.str;
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description = lib.mdDoc "Path to a git repository";
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};
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});
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};
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};
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};
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openFirewall = mkEnableOption (lib.mdDoc "opening the firewall when using a port option");
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};
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config = mkIf cfg.enable {
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assertions = [
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{ assertion = config.services.spamassassin.enable || !useSpamAssassin;
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message = ''
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public-inbox is configured to use SpamAssassin, but
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services.spamassassin.enable is false. If you don't need
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spam checking, set `services.public-inbox.settings.publicinboxmda.spamcheck' and
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`services.public-inbox.settings.publicinboxwatch.spamcheck' to null.
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'';
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}
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{ assertion = cfg.path != [] || !useSpamAssassin;
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message = ''
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public-inbox is configured to use SpamAssassin, but there is
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no spamc executable in services.public-inbox.path. If you
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don't need spam checking, set
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`services.public-inbox.settings.publicinboxmda.spamcheck' and
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`services.public-inbox.settings.publicinboxwatch.spamcheck' to null.
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'';
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}
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];
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services.public-inbox.settings =
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filterAttrsRecursive (n: v: v != null) {
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publicinbox = mapAttrs (n: filterAttrs (n: v: n != "description")) cfg.inboxes;
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};
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users = {
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users.public-inbox = {
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home = stateDir;
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group = "public-inbox";
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isSystemUser = true;
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};
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groups.public-inbox = {};
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};
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networking.firewall = mkIf cfg.openFirewall
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{ allowedTCPPorts = mkMerge
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(map (proto: (mkIf (cfg.${proto}.enable && types.port.check cfg.${proto}.port) [ cfg.${proto}.port ]))
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["imap" "http" "nntp"]);
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};
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services.postfix = mkIf (cfg.postfix.enable && cfg.mda.enable) {
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# Not sure limiting to 1 is necessary, but better safe than sorry.
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config.public-inbox_destination_recipient_limit = "1";
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# Register the addresses as existing
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virtual =
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concatStringsSep "\n" (mapAttrsToList (_: inbox:
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concatMapStringsSep "\n" (address:
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"${address} ${address}"
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) inbox.address
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) cfg.inboxes);
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# Deliver the addresses with the public-inbox transport
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transport =
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concatStringsSep "\n" (mapAttrsToList (_: inbox:
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concatMapStringsSep "\n" (address:
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"${address} public-inbox:${address}"
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) inbox.address
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) cfg.inboxes);
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# The public-inbox transport
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masterConfig.public-inbox = {
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type = "unix";
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privileged = true; # Required for user=
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command = "pipe";
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args = [
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"flags=X" # Report as a final delivery
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"user=${with config.users; users."public-inbox".name + ":" + groups."public-inbox".name}"
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# Specifying a nexthop when using the transport
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# (eg. test public-inbox:test) allows to
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# receive mails with an extension (eg. test+foo).
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"argv=${pkgs.writeShellScript "public-inbox-transport" ''
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export HOME="${stateDir}"
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export ORIGINAL_RECIPIENT="''${2:-1}"
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export PATH="${makeBinPath cfg.path}:$PATH"
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exec ${cfg.package}/bin/public-inbox-mda ${escapeShellArgs cfg.mda.args}
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''} \${original_recipient} \${nexthop}"
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];
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};
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};
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systemd.sockets = mkMerge (map (proto:
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mkIf (cfg.${proto}.enable && cfg.${proto}.port != null)
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{ "public-inbox-${proto}d" = {
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listenStreams = [ (toString cfg.${proto}.port) ];
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wantedBy = [ "sockets.target" ];
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};
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}
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) [ "imap" "http" "nntp" ]);
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systemd.services = mkMerge [
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(mkIf cfg.imap.enable
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{ public-inbox-imapd = mkMerge [(serviceConfig "imapd") {
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after = [ "public-inbox-init.service" "public-inbox-watch.service" ];
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requires = [ "public-inbox-init.service" ];
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serviceConfig = {
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ExecStart = escapeShellArgs (
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[ "${cfg.package}/bin/public-inbox-imapd" ] ++
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cfg.imap.args ++
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optionals (cfg.imap.cert != null) [ "--cert" cfg.imap.cert ] ++
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optionals (cfg.imap.key != null) [ "--key" cfg.imap.key ]
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);
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};
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}];
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})
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(mkIf cfg.http.enable
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{ public-inbox-httpd = mkMerge [(serviceConfig "httpd") {
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after = [ "public-inbox-init.service" "public-inbox-watch.service" ];
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requires = [ "public-inbox-init.service" ];
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serviceConfig = {
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ExecStart = escapeShellArgs (
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[ "${cfg.package}/bin/public-inbox-httpd" ] ++
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cfg.http.args ++
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# See https://public-inbox.org/public-inbox.git/tree/examples/public-inbox.psgi
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# for upstream's example.
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[ (pkgs.writeText "public-inbox.psgi" ''
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#!${cfg.package.fullperl} -w
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use strict;
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use warnings;
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use Plack::Builder;
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use PublicInbox::WWW;
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my $www = PublicInbox::WWW->new;
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$www->preload;
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builder {
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# If reached through a reverse proxy,
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# make it transparent by resetting some HTTP headers
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# used by public-inbox to generate URIs.
|
|
enable 'ReverseProxy';
|
|
|
|
# No need to send a response body if it's an HTTP HEAD requests.
|
|
enable 'Head';
|
|
|
|
# Route according to configured domains and root paths.
|
|
${concatMapStrings (path: ''
|
|
mount q(${path}) => sub { $www->call(@_); };
|
|
'') cfg.http.mounts}
|
|
}
|
|
'') ]
|
|
);
|
|
};
|
|
}];
|
|
})
|
|
(mkIf cfg.nntp.enable
|
|
{ public-inbox-nntpd = mkMerge [(serviceConfig "nntpd") {
|
|
after = [ "public-inbox-init.service" "public-inbox-watch.service" ];
|
|
requires = [ "public-inbox-init.service" ];
|
|
serviceConfig = {
|
|
ExecStart = escapeShellArgs (
|
|
[ "${cfg.package}/bin/public-inbox-nntpd" ] ++
|
|
cfg.nntp.args ++
|
|
optionals (cfg.nntp.cert != null) [ "--cert" cfg.nntp.cert ] ++
|
|
optionals (cfg.nntp.key != null) [ "--key" cfg.nntp.key ]
|
|
);
|
|
};
|
|
}];
|
|
})
|
|
(mkIf (any (inbox: inbox.watch != []) (attrValues cfg.inboxes)
|
|
|| cfg.settings.publicinboxwatch.watchspam != null)
|
|
{ public-inbox-watch = mkMerge [(serviceConfig "watch") {
|
|
inherit (cfg) path;
|
|
wants = [ "public-inbox-init.service" ];
|
|
requires = [ "public-inbox-init.service" ] ++
|
|
optional (cfg.settings.publicinboxwatch.spamcheck == "spamc") "spamassassin.service";
|
|
wantedBy = [ "multi-user.target" ];
|
|
serviceConfig = {
|
|
ExecStart = "${cfg.package}/bin/public-inbox-watch";
|
|
ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
|
|
};
|
|
}];
|
|
})
|
|
({ public-inbox-init = let
|
|
PI_CONFIG = gitIni.generate "public-inbox.ini"
|
|
(filterAttrsRecursive (n: v: v != null) cfg.settings);
|
|
in mkMerge [(serviceConfig "init") {
|
|
wantedBy = [ "multi-user.target" ];
|
|
restartIfChanged = true;
|
|
restartTriggers = [ PI_CONFIG ];
|
|
script = ''
|
|
set -ux
|
|
install -D -p ${PI_CONFIG} ${stateDir}/.public-inbox/config
|
|
'' + optionalString useSpamAssassin ''
|
|
install -m 0700 -o spamd -d ${stateDir}/.spamassassin
|
|
${optionalString (cfg.spamAssassinRules != null) ''
|
|
ln -sf ${cfg.spamAssassinRules} ${stateDir}/.spamassassin/user_prefs
|
|
''}
|
|
'' + concatStrings (mapAttrsToList (name: inbox: ''
|
|
if [ ! -e ${stateDir}/inboxes/${escapeShellArg name} ]; then
|
|
# public-inbox-init creates an inbox and adds it to a config file.
|
|
# It tries to atomically write the config file by creating
|
|
# another file in the same directory, and renaming it.
|
|
# This has the sad consequence that we can't use
|
|
# /dev/null, or it would try to create a file in /dev.
|
|
conf_dir="$(mktemp -d)"
|
|
|
|
PI_CONFIG=$conf_dir/conf \
|
|
${cfg.package}/bin/public-inbox-init -V2 \
|
|
${escapeShellArgs ([ name "${stateDir}/inboxes/${name}" inbox.url ] ++ inbox.address)}
|
|
|
|
rm -rf $conf_dir
|
|
fi
|
|
|
|
ln -sf ${inbox.description} \
|
|
${stateDir}/inboxes/${escapeShellArg name}/description
|
|
|
|
export GIT_DIR=${stateDir}/inboxes/${escapeShellArg name}/all.git
|
|
if test -d "$GIT_DIR"; then
|
|
# Config is inherited by each epoch repository,
|
|
# so just needs to be set for all.git.
|
|
${pkgs.git}/bin/git config core.sharedRepository 0640
|
|
fi
|
|
'') cfg.inboxes
|
|
) + ''
|
|
shopt -s nullglob
|
|
for inbox in ${stateDir}/inboxes/*/; do
|
|
# This should be idempotent, but only do it for new
|
|
# inboxes anyway because it's only needed once, and could
|
|
# be slow for large pre-existing inboxes.
|
|
ls -1 "$inbox" | grep -q '^xap' ||
|
|
${cfg.package}/bin/public-inbox-index "$inbox"
|
|
done
|
|
'';
|
|
serviceConfig = {
|
|
Type = "oneshot";
|
|
RemainAfterExit = true;
|
|
StateDirectory = [
|
|
"public-inbox/.public-inbox"
|
|
"public-inbox/.public-inbox/emergency"
|
|
"public-inbox/inboxes"
|
|
];
|
|
};
|
|
}];
|
|
})
|
|
];
|
|
environment.systemPackages = with pkgs; [ cfg.package ];
|
|
};
|
|
meta.maintainers = with lib.maintainers; [ julm qyliss ];
|
|
}
|