Build private boost version if not found

.github/workflows/cmake-multi-platform.yml

@@ -35,7 +35,7 @@ jobs:
     - name: Install Catch2 Ubuntu
       if: matrix.os == 'ubuntu-latest'
       run: >
-        sudo apt-get update && sudo apt-get install catch2 libboost-all-dev libpython3-all-dev
+        sudo apt-get update && sudo apt-get install catch2 libpython3-all-dev
 
     - name: setup python
       uses: actions/setup-python@v5
@@ -45,16 +45,7 @@ jobs:
     - name: Install Catch2 macOS
       if: matrix.os == 'macos-latest'
       run: >
-        brew install catch2 boost-python3
-
-    - name: Install Boost Windows
-      if: matrix.os == 'windows-latest'
-      uses: MarkusJx/install-boost@v2.4.4
-      id: install-boost
-      with:
-          boost_version: 1.83.0
-          platform_version: 2019
-          toolset: msvc
+        brew install catch2
 
     - name: Install dependencies Window
       if: matrix.os == 'windows-latest'
@@ -62,8 +53,6 @@ jobs:
       shell: cmd
 
     - name: Configure CMake
-      env:
-        BOOST_ROOT: ${{ steps.install-boost.outputs.BOOST_ROOT }}
       run: >
         cmake -B ${{ steps.strings.outputs.build-output-dir }}
         -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }}

CMakeLists.txt

@@ -33,6 +33,12 @@ include(CTest)
 include(VersionString)
 include(FetchContent)
 
+# The default build type must be set before project()
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR AND NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  set(CMAKE_BUILD_TYPE Release CACHE STRING "Build type" FORCE)
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
+endif()
+
 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers")
 elseif(MSVC)

python-module/CMakeLists.txt

@@ -27,7 +27,25 @@ if(CMAKE_VERSION GREATER_EQUAL 3.30)
 endif()
 
 find_package(Python REQUIRED COMPONENTS Interpreter Development)
-find_package(Boost 1.83 REQUIRED COMPONENTS python)
+find_package(Boost 1.83 QUIET COMPONENTS python)
+
+if(NOT Boost_FOUND)
+	include(CPM)
+
+	# boost is a huge project and directly downloading the 'alternate release'
+	# from github is much faster than recursively cloning the repo.
+	CPMAddPackage(
+		NAME Boost
+		VERSION 1.84.0
+		URL https://github.com/boostorg/boost/releases/download/boost-1.84.0/boost-1.84.0.tar.xz
+		URL_HASH SHA256=2e64e5d79a738d0fa6fb546c6e5c2bd28f88d268a2a080546f74e5ff98f29d0e
+		OPTIONS
+			"BOOST_ENABLE_CMAKE ON"
+			"BOOST_INCLUDE_LIBRARIES python"
+			"BOOST_ENABLE_PYTHON ON"
+			"CMAKE_POSITION_INDEPENDENT_CODE ON"
+	)
+endif()
 
 # ---------
 add_library(mkdssp_module SHARED dssp-python-plugin.cpp)