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[stor4nfv.git] / src / ceph / cmake / modules / CTags.cmake

diff --git a/src/ceph/cmake/modules/CTags.cmake b/src/ceph/cmake/modules/CTags.cmake
new file mode 100644 (file)
index 0000000..55b2288
--- /dev/null
+++ b/src/ceph/cmake/modules/CTags.cmake
@@ -0,0 +1,40 @@
+find_program(CTAGS_EXECUTABLE ctags)
+
+function(add_tags name)
+  cmake_parse_arguments(TAGS "" "SRC_DIR;TAG_FILE" "EXCLUDE_OPTS;EXCLUDES" ${ARGN})
+  set(excludes ${TAGS_EXCLUDES})
+  if(TAGS_EXCLUDE_OPTS)
+    # always respect EXCLUDES_OPTS
+    list(APPEND excludes ${TAGS_EXCLUDE_OPTS})
+  else()
+    # exclude the submodules under SRC_DIR by default
+    execute_process(
+      COMMAND git config --file .gitmodules --get-regexp path
+      COMMAND awk "/${TAGS_SRC_DIR}/ { print $2 }"
+      WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+      RESULT_VARIABLE result_code
+      OUTPUT_VARIABLE submodules
+      OUTPUT_STRIP_TRAILING_WHITESPACE)
+    if(${result_code} EQUAL 0)
+      string(REPLACE "${TAGS_SRC_DIR}/" "" submodules ${submodules})
+      # cmake list uses ";" as the delimiter, so split the string manually
+      # before iterating in it.
+      string(REPLACE "\n" ";" submodules ${submodules})
+      list(APPEND excludes ${submodules})
+    endif()
+  endif()
+  message(STATUS "exclude following files under ${TAGS_SRC_DIR}: ${excludes}")
+  # add_custom_target() accepts a list after "COMMAND" keyword, so we should
+  # make exclude_arg a list, otherwise cmake will quote it. and ctags will
+  # take it as as a single argument.
+  foreach(exclude ${excludes})
+    list(APPEND exclude_args --exclude=${exclude})
+  endforeach()
+  add_custom_target(${name}
+    COMMAND ${CTAGS_EXECUTABLE} -R --c++-kinds=+p --fields=+iaS --extra=+q ${exclude_args}
+    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/${TAGS_SRC_DIR}
+    COMMENT "Building ctags file ${TAGS_TAG_FILE}"
+    VERBATIM)
+  set_source_files_properties(${CMAKE_SOURCE_DIR}/${TAGS_TAG_FILE} PROPERTIES
+    GENERATED true)
+endfunction()