1 files changed, 47 insertions, 0 deletions
diff --git a/cmake/InstallConfig.cmake b/cmake/InstallConfig.cmake
new file mode 100644
index 0000000..70eae91
--- /dev/null
+++ b/cmake/InstallConfig.cmake
@@ -0,0 +1,47 @@
+# Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+
+#
+# Install $src into directory $dest - usually only used for config files
+#
+# * similar to install() a non absolute path is prefixed with CMAKE_INSTALL_PREFIX on runtime
+# * in case of CPack path with be prefixed with share/skel/
+# * DESTDIR is prefixed as well
+#
+# also see https://cmake.org/cmake/help/latest/command/install.html
+
+function(install_if_not_exists src dest)
+  if(NOT IS_ABSOLUTE "${src}")
+    set(src "${CMAKE_CURRENT_SOURCE_DIR}/${src}")
+  endif()
+
+  get_filename_component(src_name "${src}" NAME)
+
+  install(CODE "
+    set(dest \"${dest}\")
+
+    if (\"\${CMAKE_INSTALL_PREFIX}\" MATCHES .*/_CPack_Packages/.*)
+      set(dest \"share/skel/\${dest}\")
+      set(force_overwrite TRUE)
+    else()
+      set(force_overwrite FALSE)
+    endif()
+
+    if(NOT IS_ABSOLUTE \"\${dest}\")
+      set(dest \"\${CMAKE_INSTALL_PREFIX}/\${dest}\")
+    endif()
+
+    set(full_dest \"\$ENV{DESTDIR}\${dest}/${src_name}\")
+
+    if(force_overwrite OR NOT EXISTS \"\${full_dest}\")
+      message(STATUS \"Installing: ${src} into \${full_dest}\")
+
+      execute_process(COMMAND \${CMAKE_COMMAND} -E copy \"${src}\" \"\${full_dest}\"
+                      RESULT_VARIABLE copy_result
+                      ERROR_VARIABLE error_output)
+      if(copy_result)
+        message(FATAL_ERROR \${error_output})
+      endif()
+    else()
+      message(STATUS \"Skipping  : \${full_dest}\")
+    endif()
+  ")
+endfunction(install_if_not_exists)