Run "makecache" periodically to keep the cache ready.

CMakeLists.txt

@@ -7,6 +7,7 @@ project(dnf5 LANGUAGES CXX C VERSION ${VERSION_PRIME}.${VERSION_MAJOR}.${VERSION
 cmake_policy(VERSION ${CMAKE_VERSION})
 
 set (CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+set (SYSTEMD_DIR "/usr/lib/systemd/system")
 
 message("Building ${PROJECT_NAME} version ${PROJECT_VERSION}")
 
@@ -134,6 +135,7 @@ include_directories("${PROJECT_SOURCE_DIR}/common")
 
 # libdnf5
 add_subdirectory("common")
+add_subdirectory("etc")
 add_subdirectory("include")
 add_subdirectory("libdnf5")
 add_subdirectory("libdnf5-cli")

dnf5.spec

@@ -263,12 +263,23 @@ DNF5 is a command-line package manager that automates the process of installing,
 upgrading, configuring, and removing computer programs in a consistent manner.
 It supports RPM packages, modulemd modules, and comps groups & environments.
 
+%post
+%systemd_post dnf5-makecache.timer
+
+%preun
+%systemd_preun dnf5-makecache.timer
+
+%postun
+%systemd_postun_with_restart dnf5-makecache.timer
+
 %files -f dnf5.lang
 %{_bindir}/dnf5
 %if %{with dnf5_obsoletes_dnf}
 %{_bindir}/dnf
 %{_bindir}/yum
 %endif
+%{_unitdir}/dnf5-makecache.service
+%{_unitdir}/dnf5-makecache.timer
 
 %if 0%{?fedora} || 0%{?rhel} > 10
 %{_bindir}/microdnf

etc/CMakeLists.txt

@@ -0,0 +1 @@
+add_subdirectory("systemd")

etc/systemd/CMakeLists.txt

@@ -0,0 +1,5 @@
+set(systemd_FILES
+    dnf5-makecache.service
+    dnf5-makecache.timer)
+
+install(FILES ${systemd_FILES} DESTINATION ${SYSTEMD_DIR})

etc/systemd/dnf5-makecache.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=dnf5 makecache
+# On systems managed by either rpm-ostree/ostree, dnf is read-only;
+# while someone might theoretically want the cache updated, in practice
+# anyone who wants that could override this via a file in /etc.
+ConditionPathExists=!/run/ostree-booted
+
+After=network-online.target
+
+[Service]
+Type=oneshot
+Nice=19
+IOSchedulingClass=2
+IOSchedulingPriority=7
+ExecStart=/usr/bin/dnf5 makecache

etc/systemd/dnf5-makecache.timer

@@ -0,0 +1,15 @@
+[Unit]
+Description=dnf5 makecache
+ConditionKernelCommandLine=!rd.live.image
+# See comment in dnf5-makecache.service
+ConditionPathExists=!/run/ostree-booted
+Wants=network-online.target
+
+[Timer]
+OnBootSec=10min
+OnUnitInactiveSec=1h
+RandomizedDelaySec=60m
+Unit=dnf5-makecache.service
+
+[Install]
+WantedBy=timers.target