File ceph-cmake-ensure-git-exists-before-executing-it.patch of Package ceph

From 8615731637a116f7b9299c6122a0e058d43a4f6d Mon Sep 17 00:00:00 2001
From: Dominique Leuenberger <dimstar@opensuse.org>
Date: Tue, 19 Dec 2023 13:28:29 +0100
Subject: [PATCH] cmake: Ensure git exists before executing it
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CMake 3.28 has turned stricter when executing string(REPLACE …) and
expects four or more commands. In case of distro package builds from
tarball, it happens that git is not present. CTags.cmake tries to
catch that by veriying the exit status of the command, but as there
is in fact git | awk, awk returns 0 even when git does not exist.

Ensure that the variable submodules has been defined before trying
to replace substrings in this variable.

Signed-off-by: Dominique Leuenberger <dimstar@opensuse.org>
---
 cmake/modules/CTags.cmake | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/cmake/modules/CTags.cmake b/cmake/modules/CTags.cmake
index c3e1b3799b024..772f647f947d7 100644
--- a/cmake/modules/CTags.cmake
+++ b/cmake/modules/CTags.cmake
@@ -3,13 +3,14 @@ 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})
+  find_package(Git)
   if(TAGS_EXCLUDE_OPTS)
     # always respect EXCLUDES_OPTS
     list(APPEND excludes ${TAGS_EXCLUDE_OPTS})
-  else()
+  elseif(Git_FOUND)
     # exclude the submodules under SRC_DIR by default
     execute_process(
-      COMMAND git config --file .gitmodules --get-regexp path
+      COMMAND ${GIT_EXECUTABLE} config --file .gitmodules --get-regexp path
       COMMAND awk "/${TAGS_SRC_DIR}/ { print $2 }"
       WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
       RESULT_VARIABLE result_code