From 42b2fe0813add95557e4c4cede968906da10f2c7 Mon Sep 17 00:00:00 2001
From: ClausKlein <claus.klein@arcormail.de>
Date: Fri, 8 Nov 2024 21:41:35 +0100
Subject: [PATCH] prevent in source build

---
 .github/workflows/ci_tests.yml | 7 +++----
 .gitignore                     | 7 ++-----
 CMakeLists.txt                 | 4 ++++
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/.github/workflows/ci_tests.yml b/.github/workflows/ci_tests.yml
index f0fafcd..bc2b321 100644
--- a/.github/workflows/ci_tests.yml
+++ b/.github/workflows/ci_tests.yml
@@ -31,14 +31,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # TODO: platform: [ubuntu-24.04, macos-15]
-        platform: [ubuntu-24.04]
+        platform: [ubuntu-24.04, macos-15]
         compiler:
           - cpp: g++-14
             c: gcc-14
           - cpp: clang++-18
             c: clang-18
-        cpp_version: [20, 23, 26]
+        cpp_version: [17, 20, 23, 26]
         cmake_args:
           - description: "Default"
             args: ""
@@ -71,7 +70,7 @@ jobs:
       - name: Install Ninja
         uses: lukka/get-cmake@latest
         with:
-          cmakeVersion: "~3.30.0"
+          cmakeVersion: "~3.25.0"
           ninjaVersion: "^1.11.1"
       - name: Print installed softwares
         run: |
diff --git a/.gitignore b/.gitignore
index 8736258..d82e612 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,11 +1,8 @@
 #
-# TODO(CK): prevent in source build!
+# prevent in source build!
 #
-*.cmake
 /CMakeCache.txt
+/CMakeFiles/
 /CMakeUserPresets.json
 /build
 /stagedir
-CMakeFiles/
-Makefile
-compile_commands.json
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ec37b35..8509837 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,6 +9,10 @@ project(
     LANGUAGES CXX
 )
 
+if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
+    message(FATAL_ERROR "In-source builds are not allowed!")
+endif()
+
 include(CPack)
 include(FetchContent)
 include(GNUInstallDirs)