From b52681021d427bdcaeb423e25caeb29f37278df9 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <anonymous.maarten@gmail.com>
Date: Wed, 25 Oct 2023 02:42:13 +0200
Subject: [PATCH] cmake: add clang-format target

---
 CMakeLists.txt | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ed157136..8d3fa647 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -329,3 +329,27 @@ if (MSVC)
     set_property(TARGET lego1 PROPERTY JOB_POOL_LINK msvc_lego1)
   endif()
 endif()
+
+find_program(CLANGFORMAT_BIN NAMES clang-format)
+if(EXISTS "${CLANGFORMAT_BIN}")
+  execute_process(COMMAND "${CLANGFORMAT_BIN}" --version
+    OUTPUT_VARIABLE "CLANGFORMAT_VERSION_OUTPUT"
+    RESULT_VARIABLE "CLANGFORMAT_RESULT"
+  )
+  if(CLANGFORMAT_RESULT EQUAL 0 AND CLANGFORMAT_VERSION_OUTPUT MATCHES "version ([0-9\\.]+)")
+    set(CLANGFORMAT_VERSION "${CMAKE_MATCH_1}")
+    set(CLANGFORMAT_VERSION_REQUIRED "17.0")
+    message(DEBUG "Found clang-format version ${CLANGFORMAT_VERSION} (needs ${CLANGFORMAT_VERSION_REQUIRED}")
+    if(CLANGFORMAT_VERSION VERSION_GREATER_EQUAL "${CLANGFORMAT_VERSION_REQUIRED}")
+      file(GLOB_RECURSE isle_sources
+        "${PROJECT_SOURCE_DIR}/ISLE/*.cpp"
+        "${PROJECT_SOURCE_DIR}/ISLE/*.h"
+        "${PROJECT_SOURCE_DIR}/LEGO1/*.cpp"
+        "${PROJECT_SOURCE_DIR}/LEGO1/*.h"
+      )
+      string(REPLACE ";" "\n" isle_sources_lines "${isle_sources}")
+      file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/isle_sources.txt" "${isle_sources_lines}\n")
+      add_custom_target(clang-format ${CLANGFORMAT_BIN} -i "--files=${CMAKE_CURRENT_BINARY_DIR}/isle_sources.txt")
+    endif()
+  endif()
+endif()