From 69e453ad5460d72b8283fc45553bd68ee7fb2595 Mon Sep 17 00:00:00 2001
From: Wilfried Goesgens <willi@arangodb.com>
Date: Wed, 28 Sep 2016 11:10:46 +0200
Subject: [PATCH] calculate systemd unit directory in cmake instead of leaning
 on specfile finding it in some rpm magic

---
 Installation/rpm/arangodb.spec.in | 16 +++++++---------
 cmake/ArangoDBInstall.cmake       | 32 ++++++++++++++++++-------------
 2 files changed, 26 insertions(+), 22 deletions(-)

diff --git a/Installation/rpm/arangodb.spec.in b/Installation/rpm/arangodb.spec.in
index 5b658c90da..1d2484e78e 100644
--- a/Installation/rpm/arangodb.spec.in
+++ b/Installation/rpm/arangodb.spec.in
@@ -131,8 +131,8 @@ mkdir -p %{buildroot}%{_piddir}
 %{_datadir}/arangodb3
 %{_sysconfdir}/init.d/arangodb3
 
-%if 0%{?suse_version} >= 1210
-%{_unitdir}/@CPACK_PACKAGE_NAME@.service
+%if @IS_SYSTEMD_INSTALL@
+@SYSTEMD_UNIT_DIR@/@CPACK_PACKAGE_NAME@.service
 %endif
 
 
@@ -175,7 +175,7 @@ mkdir -p %{buildroot}%{_piddir}
 %{fillup_and_insserv -f -y arangodb3}
 %restart_on_update arangodb3
 
-%if 0%{?suse_version} >= 1210
+%if @IS_SYSTEMD_INSTALL@
 %service_add_post @CPACK_PACKAGE_NAME@.service
 %endif
 
@@ -206,7 +206,7 @@ Start ArangoDB shell client:
   > %{_bindir}/arangosh
 "
 
-%if 0%{?suse_version} >= 1210
+%if @IS_SYSTEMD_INSTALL@
 echo "Start ArangoDB service:
   > systemctl start arangodb3.service
 
@@ -241,7 +241,7 @@ exit 0
 %restart_on_update arangodb3
 %insserv_cleanup
 
-%if 0%{?suse_version} >= 1210
+%if @IS_SYSTEMD_INSTALL@
 %service_del_postun arangodb3.service
 %endif
 
@@ -265,7 +265,7 @@ if ! getent passwd arangodb >/dev/null 2>&1; then
         /usr/sbin/usermod -c "Arango Server" arangodb
 fi
 
-%if 0%{?suse_version} >= 1210
+%if @IS_SYSTEMD_INSTALL@
 %service_add_pre arangodb3.service
 %endif
 
@@ -274,12 +274,10 @@ fi
 ## -----------------------------------------------------------------------------
 
 %preun
-%if 0%{?suse_version}
+%if @IS_SYSTEMD_INSTALL@
 %stop_on_removal arangodb3
 
-%if 0%{?suse_version} >= 1210
 %service_del_preun arangodb3.service
-%endif
 
 %else
 %{_sysconfdir}/init.d/arangodb stop > /dev/null 2>&1 || true
diff --git a/cmake/ArangoDBInstall.cmake b/cmake/ArangoDBInstall.cmake
index 349647483a..e034b6367f 100644
--- a/cmake/ArangoDBInstall.cmake
+++ b/cmake/ArangoDBInstall.cmake
@@ -85,21 +85,27 @@ install(
 ################################################################################
 ### @brief detect if we're on a systemd enabled system; if install unit file.
 ################################################################################
-if (IS_DIRECTORY /usr/lib/systemd/system)
-  configure_file (
-    ${ARANGODB_SOURCE_DIR}/Installation/systemd/arangodb3.service.in
-    ${PROJECT_BINARY_DIR}/usr/lib/systemd/system/arangodb3.service
-    NEWLINE_STYLE UNIX)
-  if (${USE_ENTERPRISE})
-    install(FILES ${PROJECT_BINARY_DIR}/usr/lib/systemd/system/arangodb3.service
-      DESTINATION /usr/lib/systemd/system/arangodb3e.service)
-  else()
-    install(FILES ${PROJECT_BINARY_DIR}/usr/lib/systemd/system/arangodb3.service
-      DESTINATION /usr/lib/systemd/system/arangodb3.service)
+set(IS_SYSTEMD_INSTALL false)
+set(SYSTEMD_UNIT_DIR "")
+if (UNIX)
+  find_package(PkgConfig QUIET)
+  pkg_check_modules(SYSTEMD systemd)
+  if (SYSTEMD_FOUND)
+    pkg_get_variable(SYSTEMD_UNIT_DIR systemd systemdsystemunitdir)
+    set(IS_SYSTEMD_INSTALL true)
+    configure_file (
+        ${ARANGODB_SOURCE_DIR}/Installation/systemd/arangodb3.service.in
+        ${PROJECT_BINARY_DIR}${SYSTEMD_UNIT_DIR}/arangodb3.service
+        NEWLINE_STYLE UNIX)
+      if (${USE_ENTERPRISE})
+        install(FILES ${PROJECT_BINARY_DIR}${SYSTEMD_UNIT_DIR}/arangodb3.service
+          DESTINATION ${SYSTEMD_UNIT_DIR}/arangodb3e.service)
+      else()
+        install(FILES ${PROJECT_BINARY_DIR}${SYSTEMD_UNIT_DIR}/arangodb3.service
+          DESTINATION ${SYSTEMD_UNIT_DIR}/arangodb3.service)
+      endif()
   endif()
 endif()
-
-
 ################################################################################
 ### @brief propagate the locations into our programms:
 ################################################################################