Use config-based creation of users by systemd-sysusers, get rid of rpm-helper

mariadb-sysusers.conf

@@ -0,0 +1,3 @@
+u @muser@ - "MySQL DB server" /srv/mysql
+g @muser@ -
+m @muser@ @muser@

mariadb.spec

@@ -27,6 +27,7 @@ Source0:	https://downloads.mariadb.com/MariaDB/mariadb-%{version}/source/mariadb
 Source100:	mysqld.service
 Source101:	mysqld-prepare-db-dir
 Source102:	mysqld-wait-ready
+Source103:	mariadb-sysusers.conf
 Source1000:	%{name}.rpmlintrc
 BuildRequires:	bison
 BuildRequires:	cmake
@@ -307,14 +308,17 @@ Obsoletes:	mysql-server < 5.7
 Provides:	mysql-server = %{EVRD}
 # for the script mysqld_safe
 Requires:	hostname
-Requires(post,preun):	rpm-helper
+Requires(pre):	/bin/systemd-sysusers
 
 %description server
 The MariaDB server. For a full MariaDB database server, install
 package '%{name}'.
 
 %pre server
-%_pre_useradd %{muser} /srv/mysql /sbin/nologin
+# https://nixtux.ru/1002
+%{expand:
+%(echo '%{sysusers_create_package %{name} %{SOURCE103}}' | sed -e 's,@muser@,%{muser},g')
+}
 
 %post server
 %systemd_post mysqld.service
@@ -375,6 +379,7 @@ package '%{name}'.
 %{_bindir}/wsrep_*
 %{_sbindir}/mysqld
 %{_unitdir}/mysqld.service
+%{_sysusersdir}/%{name}.conf
 %{_sbindir}/mysqld-prepare-db-dir
 %{_bindir}/mysqld-wait-ready
 %doc %{_docdir}/%{name}-%{version}
@@ -615,3 +620,6 @@ rm -f %{buildroot}%{_datadir}/groonga-normalizer-mysql/README.md \
 	%{buildroot}%{_datadir}/groonga/README.md \
 	%{buildroot}%{_datadir}/mysql/mroonga/AUTHORS \
 	%{buildroot}%{_datadir}/mysql/mroonga/COPYING
+
+mkdir -p %{buildroot}%{_sysusersdir}
+cat %{SOURCE1033} | sed -e 's,@muser@,%{muser},g' > %{buildroot}%{_sysusersdir}/%{name}.conf