misc_nixos-mailserver/mail-server/users.nix

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# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2017 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
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{ config, pkgs, lib, ... }:
with config.mailserver;
let
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vmail_user = {
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name = vmailUserName;
isNormalUser = false;
uid = vmailUID;
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home = mailDirectory;
createHome = true;
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group = vmailGroupName;
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};
# accountsToUser :: String -> UserRecord
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accountsToUser = account: {
isNormalUser = false;
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group = vmailGroupName;
inherit (account) hashedPassword name;
};
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# mail_users :: { [String]: UserRecord }
mail_users = lib.foldl (prev: next: prev // { "${next.name}" = next; }) {}
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(map accountsToUser (lib.attrValues loginAccounts));
virtualMailUsersActivationScript = pkgs.writeScript "activate-virtual-mail-users" ''
#!${pkgs.stdenv.shell}
set -euo pipefail
# Create directory to store user sieve scripts if it doesn't exist
if (! test -d "/var/sieve"); then
mkdir "/var/sieve"
chown "${vmailUserName}:${vmailGroupName}" "/var/sieve"
chmod 770 "/var/sieve"
fi
# Copy user's sieve script to the correct location (if it exists). If it
# is null, remove the file.
${lib.concatMapStringsSep "\n" ({ name, sieveScript }:
if lib.isString sieveScript then ''
if (! test -d "/var/sieve/${name}"); then
mkdir -p "/var/sieve/${name}"
chown "${name}:${vmailGroupName}" "/var/sieve/${name}"
chmod 770 "/var/sieve/${name}"
fi
cat << EOF > "/var/sieve/${name}/default.sieve"
${sieveScript}
EOF
chown "${name}:${vmailGroupName}" "/var/sieve/${name}/default.sieve"
'' else ''
if (test -f "/var/sieve/${name}/default.sieve"); then
rm "/var/sieve/${name}/default.sieve"
fi
if (test -f "/var/sieve/${name}.svbin"); then
rm "/var/sieve/${name}/default.svbin"
fi
'') (map (user: { inherit (user) name sieveScript; })
(lib.attrValues loginAccounts))}
'';
in {
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config = lib.mkIf enable {
# set the vmail gid to a specific value
users.groups = {
"${vmailGroupName}" = { gid = vmailUID; };
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};
# define all users
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users.users = mail_users // {
"${vmail_user.name}" = lib.mkForce vmail_user;
};
systemd.services.activate-virtual-mail-users = {
wantedBy = [ "multi-user.target" ];
before = [ "dovecot2.service" ];
serviceConfig = {
ExecStart = virtualMailUsersActivationScript;
};
enable = true;
};
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};
}