rpm: pull in the alternative trigger implementation in sh

From https://src.fedoraproject.org/rpms/systemd/blob/master/f/triggers.systemd.

In 12dde791d5 scriptlets were converted to lua.
This is not only faster and cleaner, but also avoids a nasty dependency loop:
rpm implements the lua scripting internally, so we don't need a working shell
for the scriplets. This is nice and all, but unfortunately ostree wants to
capture scriptlets and execute them at a later time and does not support lua.
So in Fedora we ended up with a revert back to a shell-based implementation
[1]. At the time I hoped this would only be a temporary workaround, but three
years later I think it's fair to assume that this will not happen any time
soon. But carrying the upstream lua version and the downstream sh version is
error prone. So let's import the other version into our tree too so that they
can be kept in sync.

[1] 8e6b39457b

src/rpm/meson.build

@@ -6,9 +6,13 @@ configure_file(
         configuration : substs,
         install_dir : rpmmacrosdir == 'no' ? '' : rpmmacrosdir)
 
+# Those doesn't get installed anywhere, one of them needs to included in the
+# rpm spec file definition.
 configure_file(
         input : 'triggers.systemd.in',
         output : 'triggers.systemd',
         configuration : substs)
-# This doesn't get installed anywhere, it needs to included in the rpm spec
-# file definition.
+configure_file(
+        input : 'triggers.systemd.sh.in',
+        output : 'triggers.systemd.sh',
+        configuration : substs)

src/rpm/triggers.systemd.sh.in

@@ -0,0 +1,111 @@
+#  -*- Mode: rpm-spec; indent-tabs-mode: nil -*- */
+#  SPDX-License-Identifier: LGPL-2.1+
+#
+#  This file is part of systemd.
+#
+#  Copyright 2015 Zbigniew Jędrzejewski-Szmek
+#  Copyright 2018 Neal Gompa
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+#  systemd 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
+#  Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public License
+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+
+# The contents of this are an example to be copied into systemd.spec.
+#
+# Minimum rpm version supported: 4.13.0
+
+%transfiletriggerin -P 900900 -- /usr/lib/systemd/system /etc/systemd/system
+# This script will run after any package is initially installed or
+# upgraded. We care about the case where a package is initially
+# installed, because other cases are covered by the *un scriptlets,
+# so sometimes we will reload needlessly.
+if test -d /run/systemd/system; then
+  %{_bindir}/systemctl daemon-reload
+fi
+
+%transfiletriggerun -- /usr/lib/systemd/system /etc/systemd/system
+# On removal, we need to run daemon-reload after any units have been
+# removed. %transfiletriggerpostun would be ideal, but it does not get
+# executed for some reason.
+# On upgrade, we need to run daemon-reload after any new unit files
+# have been installed, but before %postun scripts in packages get
+# executed. %transfiletriggerun gets the right list of files
+# but it is invoked too early (before changes happen).
+# %filetriggerpostun happens at the right time, but it fires for
+# every package.
+# To execute the reload at the right time, we create a state
+# file in %transfiletriggerun and execute the daemon-reload in
+# the first %filetriggerpostun.
+
+if test -d "/run/systemd/system"; then
+    mkdir -p "%{_localstatedir}/lib/rpm-state/systemd"
+    touch "%{_localstatedir}/lib/rpm-state/systemd/needs-reload"
+fi
+
+%filetriggerpostun -P 1000100 -- /usr/lib/systemd/system /etc/systemd/system
+if test -f "%{_localstatedir}/lib/rpm-state/systemd/needs-reload"; then
+    rm -rf "%{_localstatedir}/lib/rpm-state/systemd"
+    %{_bindir}/systemctl daemon-reload
+fi
+
+%transfiletriggerin -P 100700 -- /usr/lib/sysusers.d
+# This script will process files installed in /usr/lib/sysusers.d to create
+# specified users automatically. The priority is set such that it
+# will run before the tmpfiles file trigger.
+if test -d /run/systemd/system; then
+  %{_bindir}/systemd-sysusers || :
+fi
+
+%transfiletriggerin -P 100500 -- /usr/lib/tmpfiles.d
+# This script will process files installed in /usr/lib/tmpfiles.d to create
+# tmpfiles automatically. The priority is set such that it will run
+# after the sysusers file trigger, but before any other triggers.
+if test -d /run/systemd/system; then
+  %{_bindir}/systemd-tmpfiles --create || :
+fi
+
+%transfiletriggerin udev -- /usr/lib/udev/hwdb.d
+# This script will automatically invoke hwdb update if files have been
+# installed or updated in /usr/lib/udev/hwdb.d.
+if test -d /run/systemd/system; then
+  %{_bindir}/systemd-hwdb update || :
+fi
+
+%transfiletriggerin -- /usr/lib/systemd/catalog
+# This script will automatically invoke journal catalog update if files
+# have been installed or updated in /usr/lib/systemd/catalog.
+if test -d /run/systemd/system; then
+  %{_bindir}/journalctl --update-catalog || :
+fi
+
+%transfiletriggerin udev -- /usr/lib/udev/rules.d
+# This script will automatically update udev with new rules if files
+# have been installed or updated in /usr/lib/udev/rules.d.
+if test -e /run/udev/control; then
+  %{_bindir}/udevadm control --reload || :
+fi
+
+%transfiletriggerin -- /usr/lib/sysctl.d
+# This script will automatically apply sysctl rules if files have been
+# installed or updated in /usr/lib/sysctl.d.
+if test -d /run/systemd/system; then
+  /usr/lib/systemd/systemd-sysctl || :
+fi
+
+%transfiletriggerin -- /usr/lib/binfmt.d
+# This script will automatically apply binfmt rules if files have been
+# installed or updated in /usr/lib/binfmt.d.
+if test -d /run/systemd/system; then
+  # systemd-binfmt might fail if binfmt_misc kernel module is not loaded
+  # during install
+  /usr/lib/systemd/systemd-binfmt || :
+fi