Fix systemd spec file macros

Ensure that the _unitdir, _presetdir, _modulesloaddir, and
_systemdgeneratordir macros are always defined.  If not set
them to the expected default values.  Pass all of these options
to ./configure and package the resulting files in those locations.

Additionally, set __brp_mangle_shebangs_exclude_from until the
conversion to Python 3 is complete so they may be built cleanly
under mock.

Reviewed-by: Neal Gompa <ngompa@datto.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #7567
Closes #8119

config/user-systemd.m4

@@ -18,7 +18,7 @@ AC_DEFUN([ZFS_AC_CONFIG_USER_SYSTEMD], [
 	AC_ARG_WITH(systemdmodulesloaddir,
 		AC_HELP_STRING([--with-systemdmodulesloaddir=DIR],
 		[install systemd module load files into dir [[/usr/lib/modules-load.d]]]),
-		systemdmoduleloaddir=$withval,systemdmodulesloaddir=/usr/lib/modules-load.d)
+		systemdmodulesloaddir=$withval,systemdmodulesloaddir=/usr/lib/modules-load.d)
 
 	AC_ARG_WITH(systemdgeneratordir,
 		AC_HELP_STRING([--with-systemdgeneratordir=DIR],

rpm/generic/zfs-dkms.spec.in

@@ -4,6 +4,9 @@
 %define not_rpm 1
 %endif
 
+# See comment in zfs.spec.in.
+%global __brp_mangle_shebangs_exclude_from arc_summary.py|arcstat.py|dbufstat.py|test-runner.py|zts-report.py
+
 %define module  @PACKAGE@
 %define mkconf  scripts/dkms.mkconf
 

rpm/generic/zfs-kmod.spec.in

@@ -1,5 +1,8 @@
 %define module  @PACKAGE@
 
+# See comment in zfs.spec.in.
+%global __brp_mangle_shebangs_exclude_from arc_summary.py|arcstat.py|dbufstat.py|test-runner.py|zts-report.py
+
 %if !%{defined ksrc}
 %if 0%{?rhel}%{?fedora}
 %define ksrc    ${kernel_version##*___}

rpm/generic/zfs.spec.in

@@ -28,11 +28,26 @@
 %endif
 %endif
 
-# Set the default _initconfdir when undefined.
 %if %{undefined _initconfdir}
 %global _initconfdir /etc/sysconfig
 %endif
 
+%if %{undefined _unitdir}
+%global _unitdir %{_prefix}/lib/systemd/system
+%endif
+
+%if %{undefined _presetdir}
+%global _presetdir %{_prefix}/lib/systemd/system-preset
+%endif
+
+%if %{undefined _modulesloaddir}
+%global _modulesloaddir %{_prefix}/lib/modules-load.d
+%endif
+
+%if %{undefined _systemdgeneratordir}
+%global _systemdgeneratordir %{_prefix}/lib/systemd/system-generators
+%endif
+
 %bcond_with    debug
 %bcond_with    debuginfo
 %bcond_with    asan
@@ -278,7 +293,7 @@ image which is ZFS aware.
 %endif
 
 %if 0%{?_systemd}
-    %define systemd --enable-systemd --with-systemdunitdir=%{_unitdir} --with-systemdpresetdir=%{_presetdir} --disable-sysvinit
+    %define systemd --enable-systemd --with-systemdunitdir=%{_unitdir} --with-systemdpresetdir=%{_presetdir} --with-systemdmodulesloaddir=%{_modulesloaddir} --with-systemdgeneratordir=%{_systemdgeneratordir} --disable-sysvinit
     %define systemd_svcs zfs-import-cache.service zfs-import-scan.service zfs-mount.service zfs-share.service zfs-zed.service zfs.target zfs-import.target
 %else
     %define systemd --enable-sysvinit --disable-systemd
@@ -374,10 +389,10 @@ systemctl --system daemon-reload >/dev/null || true
 %{_udevdir}/zvol_id
 %{_udevdir}/rules.d/*
 %if 0%{?_systemd}
-/usr/lib/modules-load.d/*
 %{_unitdir}/*
 %{_presetdir}/*
-%{_generatordir}/*
+%{_modulesloaddir}/*
+%{_systemdgeneratordir}/*
 %else
 %config(noreplace) %{_sysconfdir}/init.d/*
 %config(noreplace) %{_initconfdir}/zfs

rpm/redhat/zfs-kmod.spec.in

@@ -1,6 +1,9 @@
 %bcond_with     debug
 %bcond_with     debuginfo
 
+# See comment in zfs.spec.in.
+%global __brp_mangle_shebangs_exclude_from arc_summary.py|arcstat.py|dbufstat.py|test-runner.py|zts-report.py
+
 Name:           @PACKAGE@-kmod
 Version:        @VERSION@
 Release:        @RELEASE@%{?dist}