From 122e7cc387f320a2af0249add39a74e629b05697 Mon Sep 17 00:00:00 2001
From: Marcel Breyer <marcel.breyer@ipvs.uni-stuttgart.de>
Date: Tue, 12 Nov 2024 14:31:56 +0100
Subject: [PATCH] Guard formatting targets behind a custom option.

---
 CMakeLists.txt | 48 +++++++++++++++++++++++++++++-------------------
 1 file changed, 29 insertions(+), 19 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f2f3fc61b..daeed246b 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -625,27 +625,37 @@ else ()
 endif ()
 target_link_libraries(${PLSSVM_BASE_LIBRARY_NAME} PUBLIC fmt::fmt)
 
-## install library to add a clang-format target
-set(PLSSVM_format_VERSION 1b43a3989de33e44e2a4f1766e9842be1744eef6)
-find_package(format QUIET)
-if (format_FOUND)
-    message(STATUS "Found package format.")
-else ()
-    message(STATUS "Couldn't find package format. Building version ${PLSSVM_format_VERSION} from source.")
-    set(FORMAT_SKIP_CMAKE ON CACHE INTERNAL "" FORCE)
-    set(FORMAT_SKIP_CLANG OFF CACHE INTERNAL "" FORCE)
-    # fetch clang-format library
-    # TODO: use original library after PR (HIP support) has been merged
-    FetchContent_Declare(format
-                         GIT_REPOSITORY https://github.com/breyerml/Format.cmake.git
-                         GIT_TAG ${PLSSVM_format_VERSION}
-                         QUIET
-    )
-    FetchContent_MakeAvailable(format)
-endif ()
-
 list(POP_BACK CMAKE_MESSAGE_INDENT)
 
+########################################################################################################################
+##                                   enable automatic formatting using clang-format                                   ##
+########################################################################################################################
+option(PLSSVM_ENABLE_FORMATTING "Enable a formatting targets using clang-format." OFF)
+if (PLSSVM_ENABLE_FORMAT)
+    list(APPEND CMAKE_MESSAGE_INDENT "Formatting:  ")
+    
+    ## install library to add a clang-format target
+    set(PLSSVM_format_VERSION 1b43a3989de33e44e2a4f1766e9842be1744eef6)
+    find_package(format QUIET)
+    if (format_FOUND)
+        message(STATUS "Found package format.")
+    else ()
+        message(STATUS "Couldn't find package format. Building version ${PLSSVM_format_VERSION} from source.")
+        set(FORMAT_SKIP_CMAKE ON CACHE INTERNAL "" FORCE)
+        set(FORMAT_SKIP_CLANG OFF CACHE INTERNAL "" FORCE)
+        # fetch clang-format library
+        # TODO: use original library after PR (HIP support) has been merged
+        FetchContent_Declare(format
+                             GIT_REPOSITORY https://github.com/breyerml/Format.cmake.git
+                             GIT_TAG ${PLSSVM_format_VERSION}
+                             QUIET
+        )
+        FetchContent_MakeAvailable(format)
+    endif ()
+    
+    list(POP_BACK CMAKE_MESSAGE_INDENT)
+endif ()
+
 ########################################################################################################################
 ##                                    enable documentation generation via doxygen                                     ##
 ########################################################################################################################