migrate from conan to CPM, depends on CMake only

Author: haohaolee

.gitignore

@@ -3,22 +3,38 @@
 **/*.so
 **/*.dylib
 
+# Legacy Conan files (no longer used with CPM)
 conan.lock
 conan_paths.cmake
 conanbuildinfo.txt
 conaninfo.txt
 graph_info.json
 
+# CMake build artifacts
 CMakeCache.txt
 CMakeFiles
 Testing
-build/*.cmake
-Makefile
+build/
+build-*/
 cmake-build-*
+Makefile
+*.cmake
+!cmake/CPM.cmake
+!cmake_module/conan.cmake
+
+# CPM cache (optional - can be shared across projects)
+_deps/
 
-.idea
+# IDE and editor files
+.idea/
+.vscode/
+.vs/
+.devcontainer/
 compile_commands.json
 DartConfiguration.tcl
 **/*.cbp
-
 tags
+
+# macOS
+.DS_Store
+._*

CMakeLists.txt

@@ -1,29 +1,46 @@
 cmake_minimum_required(VERSION 3.19)
 project(developer_joyofenergy_cpp)
 
-list(APPEND CMAKE_MODULE_PATH
-            ${CMAKE_BINARY_DIR}
-            ${CMAKE_SOURCE_DIR}/cmake_module)
-list(APPEND CMAKE_PREFIX_PATH ${CMAKE_BINARY_DIR})
-
 set(CMAKE_CXX_STANDARD 17)
 
-include(conan)
-
-conan_cmake_configure(REQUIRES boost/1.76.0
-                      REQUIRES gtest/1.11.0
-                      REQUIRES nlohmann_json/3.9.1
-                      REQUIRES date/3.0.1
-                      OPTIONS boost:header_only=True
-                      OPTIONS date:header_only=True
-                      GENERATORS cmake_find_package)
-
-conan_cmake_autodetect(settings)
-
-conan_cmake_install(PATH_OR_REFERENCE .
-                    BUILD missing
-                    REMOTE conancenter
-                    SETTINGS ${settings})
+# Include CPM package manager
+include(cmake/CPM.cmake)
+
+# Boost (header-only libraries: Beast, Asio, System)
+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 beast\;asio\;system"
+)
+
+CPMAddPackage(
+    NAME googletest
+    GITHUB_REPOSITORY google/googletest
+    GIT_TAG v1.15.2
+    VERSION 1.15.2
+    OPTIONS
+        "INSTALL_GTEST OFF"
+        "gtest_force_shared_crt ON"
+)
+
+CPMAddPackage(
+    NAME nlohmann_json
+    GITHUB_REPOSITORY nlohmann/json
+    VERSION 3.11.3
+)
+
+CPMAddPackage(
+    NAME date
+    GITHUB_REPOSITORY HowardHinnant/date
+    GIT_TAG v3.0.4
+    OPTIONS
+        "USE_SYSTEM_TZ_DB ON"
+        "BUILD_TZ_LIB OFF"
+)
 
 add_subdirectory(rest)
 add_executable(app main.cpp)

README.md

@@ -57,19 +57,13 @@ These values are used in the code and in the following examples too.
 
 ## Requirements
 
-The project requires Cmake 3.21 or
-higher.
+The project requires CMake 3.19 or higher.
 
-The project makes use of Conan.(Conan's installation documentation can be found here : [https://docs.conan.io/en/latest/installation.html](https://docs.conan.io/en/latest/installation.html)). **Tips: you need Python >= 3.5 distribution installed on your machine**
+The project uses CPM (CMake Package Manager) to automatically download and manage dependencies. No additional package manager installation is required.
 
-## Useful Conan commands
+## Build the project
 
-The project makes use of [Conan](https://conan.io/) to help you out carrying some common tasks such as building
-the project or running it.
-
-### Build the project
-
-Compiles the project, runs the test and then creates an executable file.
+Compiles the project, runs the tests and then creates an executable file.
 
 ```console
 $ mkdir build && cd build