From d012f0744e62a57079fdceabd217fb9c051349ba Mon Sep 17 00:00:00 2001
From: snider <snider@lt.hn>
Date: Mon, 6 Oct 2025 15:39:27 +0100
Subject: [PATCH] Add CMake module to download and install Conan

---
 cmake/GetConan.cmake | 90 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 cmake/GetConan.cmake

diff --git a/cmake/GetConan.cmake b/cmake/GetConan.cmake
new file mode 100644
index 00000000..ebbf2359
--- /dev/null
+++ b/cmake/GetConan.cmake
@@ -0,0 +1,90 @@
+# cmake/GetConan.cmake
+
+# This module downloads and installs Conan if it's not found.
+
+# Set the Conan version
+set(CONAN_VERSION 2.21.0)
+
+# Set the download URLs
+set(CONAN_URL_MACOS_ARM "https://github.com/conan-io/conan/releases/download/${CONAN_VERSION}/conan-${CONAN_VERSION}-macos-arm64.tgz")
+set(CONAN_URL_MACOS_INTEL "https://github.com/conan-io/conan/releases/download/${CONAN_VERSION}/conan-${CONAN_VERSION}-macos-x86_64.tgz")
+set(CONAN_URL_WINDOWS_X86_64 "https://github.com/conan-io/conan/releases/download/${CONAN_VERSION}/conan-${CONAN_VERSION}-windows-x86_64.zip")
+set(CONAN_URL_WINDOWS_ARM64 "https://github.com/conan-io/conan/releases/download/${CONAN_VERSION}/conan-${CONAN_VERSION}-windows-arm64.zip")
+set(CONAN_URL_LINUX_X86_64 "https://github.com/conan-io/conan/releases/download/${CONAN_VERSION}/conan-${CONAN_VERSION}-linux-x86_64.tgz")
+set(CONAN_URL_LINUX_AARCH64 "https://github.com/conan-io/conan/releases/download/${CONAN_VERSION}/conan-${CONAN_VERSION}-linux-aarch64.tgz")
+set(CONAN_INSTALL_DIR "${CMAKE_SOURCE_DIR}/build")
+# Set the installation directory
+if(NOT CMAKE_BINARY_DIR)
+  set(CMAKE_BINARY_DIR "${CONAN_INSTALL_DIR}")
+endif()
+
+set(CONAN_EXECUTABLE "${CONAN_INSTALL_DIR}/bin/conan")
+
+# Check if Conan is already installed
+if(NOT EXISTS "${CONAN_EXECUTABLE}")
+  message(STATUS "Conan not found. Downloading and installing...")
+
+  file(MAKE_DIRECTORY "${CONAN_INSTALL_DIR}")
+
+  # Detect the operating system and architecture
+  if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin")
+    if(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "arm64")
+      set(CONAN_URL ${CONAN_URL_MACOS_ARM})
+      set(CONAN_ARCHIVE_TYPE "tgz")
+    else()
+      set(CONAN_URL ${CONAN_URL_MACOS_INTEL})
+      set(CONAN_ARCHIVE_TYPE "tgz")
+    endif()
+  elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
+    if(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "ARM64")
+      set(CONAN_URL ${CONAN_URL_WINDOWS_ARM64})
+      set(CONAN_ARCHIVE_TYPE "zip")
+    else()
+      set(CONAN_URL ${CONAN_URL_WINDOWS_X86_64})
+      set(CONAN_ARCHIVE_TYPE "zip")
+    endif()
+  elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Linux")
+    if(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "aarch64")
+      set(CONAN_URL ${CONAN_URL_LINUX_AARCH64})
+      set(CONAN_ARCHIVE_TYPE "tgz")
+    else()
+      set(CONAN_URL ${CONAN_URL_LINUX_X86_64})
+      set(CONAN_ARCHIVE_TYPE "tgz")
+    endif()
+  else()
+    message(FATAL_ERROR "Unsupported operating system: ${CMAKE_HOST_SYSTEM_NAME}")
+  endif()
+
+  # Download and extract Conan
+  set(CONAN_ARCHIVE "${CMAKE_BINARY_DIR}/conan.${CONAN_ARCHIVE_TYPE}")
+
+  message(STATUS "Downloading ${CONAN_URL} to ${CONAN_ARCHIVE}")
+  file(DOWNLOAD "${CONAN_URL}" "${CONAN_ARCHIVE}" SHOW_PROGRESS)
+
+  message(STATUS "Extracting ${CONAN_ARCHIVE} to ${CONAN_INSTALL_DIR}")
+  if(CONAN_ARCHIVE_TYPE STREQUAL "tgz")
+    execute_process(
+      COMMAND ${CMAKE_COMMAND} -E tar xzf "${CONAN_ARCHIVE}"
+      WORKING_DIRECTORY "${CONAN_INSTALL_DIR}"
+      RESULT_VARIABLE result
+    )
+  elseif(CONAN_ARCHIVE_TYPE STREQUAL "zip")
+    # Cmake -E tar can handle zip files
+    execute_process(
+      COMMAND ${CMAKE_COMMAND} -E tar xf "${CONAN_ARCHIVE}"
+      WORKING_DIRECTORY "${CONAN_INSTALL_DIR}"
+      RESULT_VARIABLE result
+    )
+  endif()
+
+  if(NOT result EQUAL 0)
+    message(FATAL_ERROR "Failed to extract Conan archive.")
+  endif()
+
+  # Clean up the archive
+  file(REMOVE "${CONAN_ARCHIVE}")
+
+  message(STATUS "Conan installed successfully in ${CONAN_INSTALL_DIR}/conan")
+else()
+  message(STATUS "Conan already installed in ${CONAN_INSTALL_DIR}/conan")
+endif()