Add Nix flake dev shell, custom build/run commands, and CI build/test via nix develop without Conan

.github/workflows/cmakeBuildTest.yml

@@ -6,37 +6,22 @@ on:
   pull_request:
     branches: ["main"]
 
-env:
-  BUILD_TYPE: Release
-
 jobs:
   build:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Switch to gcc-14
-        run: |
-          sudo apt install gcc-14 g++-14
-          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 100 --slave /usr/bin/g++ g++ /usr/bin/g++-14 --slave /usr/bin/gcov gcov /usr/bin/gcov-14
-          sudo update-alternatives --set gcc /usr/bin/gcc-14
-
       - uses: actions/checkout@v4
 
-      - name: Install Conan
-        uses: conan-io/setup-conan@v1
+      - name: Install Nix
+        uses: cachix/install-nix-action@v31
         with:
-          cache_packages: 'true'
+          extra_nix_config: |
+            experimental-features = nix-command flakes
 
-      - name: Install Conan dependencies
+      - name: Build and test in flake dev shell
         run: |
-          mkdir cmake_build
-          cd cmake_build
-          cmake .. -DCMAKE_PROJECT_TOP_LEVEL_INCLUDES="conan_provider.cmake" -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
-
-      - name: Build
-        working-directory: ${{github.workspace}}/cmake_build
-        run: cmake --build . -j 14
-
-      - name: Test
-        working-directory: ${{github.workspace}}/cmake_build
-        run: ctest
+          nix develop --command bash -lc '
+            build release
+            ctest --test-dir cmake_build_release --output-on-failure
+          '

.gitignore

@@ -1,2 +1,6 @@
 cmake-build-debug/
-.clangd
+cmake_build/
+cmake_build_debug/
+cmake_build_release/
+.clangd
+flake.lock

.vscode/c_cpp_properties.json

@@ -3,13 +3,12 @@
         {
             "name": "Linux",
             "includePath": [
-                "${workspaceFolder}/**",
-                "~/.conan2/**"
+                "${workspaceFolder}/**"
             ],
             "defines": [],
             "cStandard": "c17",
             "intelliSenseMode": "linux-clang-x64"
         }
     ],
     "version": 4
-}
+}

CMakeLists.txt

@@ -56,7 +56,27 @@ endif ()
 
 # Packages
 find_package(absl)
-find_package(Catch2)
+find_package(Catch2 3 REQUIRED)
+
+if(NOT TARGET abseil::abseil)
+    add_library(abseil::abseil INTERFACE IMPORTED)
+    set(_absl_components
+            absl::base
+            absl::hash
+            absl::strings
+            absl::flags
+            absl::flags_parse
+            absl::flags_usage
+            absl::log
+            absl::log_globals
+            absl::log_initialize
+    )
+    foreach(_absl_component IN LISTS _absl_components)
+        if(TARGET ${_absl_component})
+            target_link_libraries(abseil::abseil INTERFACE ${_absl_component})
+        endif()
+    endforeach()
+endif()
 
 add_executable(${PROJECT_NAME}
         src/main.cpp
@@ -92,4 +112,4 @@ add_executable(tests
         src/walker_sweep.cpp
 )
 target_link_libraries(tests PRIVATE Catch2::Catch2WithMain abseil::abseil)
-add_test(NAME bdd_engine_tests COMMAND tests)
+add_test(NAME bdd_engine_tests COMMAND tests)

CMakePresets.json

@@ -5,9 +5,6 @@
     "minor": 30,
     "patch": 0
   },
-  "vendor": {
-    "conan": {}
-  },
   "configurePresets": [
     {
       "name": "DebugPreset",
@@ -19,9 +16,8 @@
         "CMAKE_BUILD_TYPE": "Debug",
         "CMAKE_EXPORT_COMPILE_COMMANDS": "ON",
         "CMAKE_CXX_FLAGS_DEBUG": "-Wall -Wextra -Wpedantic -fsanitize=address,undefined",
-        "CMAKE_EXE_LINKER_FLAGS_DEBUG": "-fsanitize=address,undefined",
-        "CMAKE_PROJECT_TOP_LEVEL_INCLUDES": "conan_provider.cmake"
+        "CMAKE_EXE_LINKER_FLAGS_DEBUG": "-fsanitize=address,undefined"
       }
     }
   ]
-}
+}

README.md

@@ -442,19 +442,23 @@ The REPL and overall application are implemented by the following
 
 # Building and Dependencies
 
-Uses [CMake](https://cmake.org/) 3.31 and [Conan](https://conan.io/) 2.15.0, tested on [GCC](https://gcc.gnu.org/) 14.
+Uses [CMake](https://cmake.org/) 3.31 and [Nix](https://nixos.org/) flakes, tested on [GCC](https://gcc.gnu.org/) 14.
 
 Depends on [Abseil](https://github.com/abseil/abseil-cpp) and [Catch2](https://github.com/catchorg/Catch2).
 
-The easiest way to configure and build is using the Conan extension in CLion.
+## Nix Development Shell
 
-Otherwise:
+This repository provides a `flake.nix` with a dev shell containing GCC 14, CMake, Ninja, Abseil and Catch2.
+
+The shell also adds `scripts/` to `PATH`, so the following commands work from any directory inside the repository:
+
+- `build debug` / `build release`: configure + build in `cmake_build_debug` or `cmake_build_release`
+- `run debug` / `run release`: configure + build and then run `bdd_engine` from your current directory
 
 ```bash
-mkdir cmake-build-release
-cd cmake-build-release
-cmake .. -G Ninja -DCMAKE_PROJECT_TOP_LEVEL_INCLUDES="conan_provider.cmake" -DCMAKE_BUILD_TYPE=Release
-cmake --build .
+nix develop
+build release
+ctest --test-dir cmake_build_release --output-on-failure
 ```
 
 ## Unit Tests
@@ -493,27 +497,10 @@ We can cross-compile the project to WebAssembly using [Emscripten](https://emscr
 
 First, we need to [install Emscripten](https://emscripten.org/docs/getting_started/downloads.html).
 
-Then we need to set up the following [Conan2 profile](https://docs.conan.io/2/reference/config_files/profiles.html),
-named `emscripten`:
-
-```text
-[settings]
-os=Emscripten
-arch=wasm
-compiler=clang
-compiler.version=19
-compiler.libcxx=libc++
-build_type=Release
-compiler.cppstd=23
-
-[tool_requires]
-emsdk/3.1.73
-```
-
 ```bash
 mkdir cmake-build-releasenodejs
 cd cmake-build-releasenodejs
-emcmake cmake .. -DCMAKE_PROJECT_TOP_LEVEL_INCLUDES="conan_provider.cmake" -DCMAKE_BUILD_TYPE=Release -DCONAN_HOST_PROFILE=emscripten -DCONAN_BUILD_PROFILE=default
+emcmake cmake .. -DCMAKE_BUILD_TYPE=Release
 make -j 14
 ```
 
@@ -528,4 +515,4 @@ Running `node bdd_engine.js` will start the REPL in Node.js and has the exact sa
 
 * https://github.com/cryptool-org/wasm-webterm
 * https://github.com/emscripten-core/emscripten/pull/23171
-* https://webassembly.sh/
+* https://webassembly.sh/