build: use pixi for managing build toolchains

.gitattributes

@@ -0,0 +1,2 @@
+# SCM syntax highlighting & preventing 3-way merges
+pixi.lock merge=binary linguist-language=YAML linguist-generated=true -diff

.github/workflows/cmake.yml

@@ -27,86 +27,43 @@ jobs:
         include:
           - os: windows-2025
             build_type: RelWithDebInfo
-            cc: clang
-            cxx: clang++
           - os: ubuntu-24.04
             build_type: Debug
-            cc: clang-20
-            cxx: clang++-20
           - os: macos-15
             build_type: Debug
-            cc: clang
-            cxx: clang++
 
     runs-on: ${{ matrix.os }}
 
     steps:
-      - name: Setup dependencies (Windows)
-        if: runner.os == 'Windows'
-        uses: MinoruSekine/setup-scoop@v4.0.1
-        with:
-          buckets: main
-          apps: ninja
-
-      - name: Setup dependencies (Linux)
-        if: runner.os == 'Linux'
-        run: |
-          sudo apt update
-          sudo apt install -y gcc-14 g++-14 libstdc++-14-dev
-          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 100
-          sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-14 100
-          sudo update-alternatives --set gcc /usr/bin/gcc-14
-          sudo update-alternatives --set g++ /usr/bin/g++-14
-          wget https://apt.llvm.org/llvm.sh
-          chmod +x llvm.sh
-          sudo ./llvm.sh 20 all
-          sudo apt install -y cmake ninja-build
-
-      - name: Setup dependencies (MacOS)
-        if: runner.os == 'macOS'
-        env:
-          HOMEBREW_NO_AUTO_UPDATE: 1
-        run: |
-          brew install llvm@20 lld@20
-
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Setup msvc sysroot for cmake
-        if: runner.os == 'Windows'
-        uses: ilammy/msvc-dev-cmd@v1
+      - name: Setup Pixi
+        uses: prefix-dev/setup-pixi@v0.9.3
+        with:
+          pixi-version: v0.59.0
+          environments: develop
+          activate-environment: true
+          cache: true
+          locked: true
 
       - name: Build clice
         shell: bash
         run: |
-          if [[ "${{ runner.os }}" == "macOS" ]]; then
-            export SDKROOT=$(xcrun --show-sdk-path)
-            export PATH="/opt/homebrew/opt/llvm@20/bin:/opt/homebrew/opt/lld@20/bin:$PATH"
-          fi
-
           cmake -B build -G Ninja \
             -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
-            -DCMAKE_C_COMPILER=${{ matrix.cc }} \
-            -DCMAKE_CXX_COMPILER=${{ matrix.cxx }} \
+            -DCLICE_DEV_ENV=ON \
             -DCLICE_ENABLE_TEST=ON \
             -DCLICE_CI_ENVIRONMENT=ON
 
           cmake --build build
 
-      - name: Install uv for integration tests
-        uses: astral-sh/setup-uv@v6
-
       - name: Run tests
         shell: bash
         run: |
           EXE_EXT=""
           if [[ "${{ runner.os }}" == "Windows" ]]; then
             EXE_EXT=".exe"
           fi
-
-          if [[ "${{ runner.os }}" == "macOS" ]]; then
-            export PATH="/opt/homebrew/opt/llvm@20/bin:/opt/homebrew/opt/lld@20/bin:$PATH"
-          fi
-
           ./build/bin/unit_tests${EXE_EXT} --test-dir="./tests/data"
           uv run --project tests pytest -s --log-cli-level=INFO tests/integration --executable=./build/bin/clice${EXE_EXT}

.gitignore

@@ -60,3 +60,8 @@ tests/unit/Local/
 .vs/
 .idea/
 .claude
+
+# pixi environments
+.env
+.pixi/*
+!.pixi/config.toml

CMakeLists.txt

@@ -1,8 +1,21 @@
-cmake_minimum_required(VERSION 3.20)
+cmake_minimum_required(VERSION 3.30)
+
+if(CLICE_DEV_ENV)
+    set(CMAKE_C_COMPILER "clang")
+    set(CMAKE_CXX_COMPILER "clang++")
+
+    # it's important to set clang to use lld here, otherwise the compiler detection
+    # may fail on some conda prebuilt clang.
+    set(CMAKE_EXE_LINKER_FLAGS    "-fuse-ld=lld" CACHE STRING "Forced LLD" FORCE)
+    set(CMAKE_SHARED_LINKER_FLAGS "-fuse-ld=lld" CACHE STRING "Forced LLD" FORCE)
+    set(CMAKE_MODULE_LINKER_FLAGS "-fuse-ld=lld" CACHE STRING "Forced LLD" FORCE)
+endif()
+
 project(CLICE_PROJECT LANGUAGES C CXX)
 
 set(CMAKE_CXX_STANDARD 23)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_SCAN_FOR_MODULES OFF)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 include(GNUInstallDirs)
@@ -23,6 +36,11 @@ if(NOT WIN32 AND CMAKE_BUILD_TYPE STREQUAL "Debug")
     string(APPEND CMAKE_SHARED_LINKER_FLAGS " -fsanitize=address")
 endif()
 
+if(APPLE)
+    # https://conda-forge.org/docs/maintainer/knowledge_base/#newer-c-features-with-old-sdk
+    string(APPEND CMAKE_CXX_FLAGS " -D_LIBCPP_DISABLE_AVAILABILITY=1")
+endif()
+
 include("${PROJECT_SOURCE_DIR}/cmake/package.cmake")
 
 add_library(clice_options INTERFACE)
@@ -49,6 +67,7 @@ elseif(APPLE)
 elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
     target_link_options(clice_options INTERFACE
         -fuse-ld=lld
+        -static-libstdc++ -static-libgcc
         -Wl,--gc-sections
     )
 endif()

cmake/package.cmake

@@ -76,6 +76,7 @@ endif()
 
 # install dependencies
 include(FetchContent)
+set(FETCHCONTENT_UPDATES_DISCONNECTED ON)
 
 if(WIN32)
     set(NULL_DEVICE NUL)
@@ -88,6 +89,8 @@ FetchContent_Declare(
     libuv
     GIT_REPOSITORY https://github.com/libuv/libuv.git
     GIT_TAG v1.x
+    GIT_SHALLOW    TRUE
+
 )
 
 if(NOT WIN32 AND CMAKE_BUILD_TYPE STREQUAL "Debug")
@@ -101,20 +104,24 @@ set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
 FetchContent_Declare(
     spdlog
     GIT_REPOSITORY https://github.com/gabime/spdlog.git
-    GIT_TAG v1.15.3
+    GIT_TAG        v1.15.3
+    GIT_SHALLOW    TRUE
 )
 
 # tomlplusplus
 FetchContent_Declare(
     tomlplusplus
     GIT_REPOSITORY https://github.com/marzer/tomlplusplus.git
+    GIT_TAG        v3.4.0
+    GIT_SHALLOW    TRUE
 )
 
 # croaring
 FetchContent_Declare(
     croaring
     GIT_REPOSITORY https://github.com/RoaringBitmap/CRoaring.git
     GIT_TAG        v4.4.2
+    GIT_SHALLOW    TRUE
 )
 set(ENABLE_ROARING_TESTS OFF CACHE INTERNAL "" FORCE)
 set(ENABLE_ROARING_MICROBENCHMARKS OFF CACHE INTERNAL "" FORCE)
@@ -124,6 +131,7 @@ FetchContent_Declare(
     flatbuffers
     GIT_REPOSITORY https://github.com/google/flatbuffers.git
     GIT_TAG        v25.9.23
+    GIT_SHALLOW    TRUE
 )
 set(FLATBUFFERS_BUILD_GRPC OFF CACHE BOOL "" FORCE)
 set(FLATBUFFERS_BUILD_TESTS OFF CACHE BOOL "" FORCE)
@@ -134,7 +142,9 @@ FetchContent_Declare(
     cpptrace
     GIT_REPOSITORY https://github.com/jeremy-rifkin/cpptrace.git
     GIT_TAG        v1.0.4
+    GIT_SHALLOW    TRUE
 )
+set(CPPTRACE_DISABLE_CXX_20_MODULES ON CACHE BOOL "" FORCE)
 
 FetchContent_MakeAvailable(libuv spdlog tomlplusplus croaring flatbuffers cpptrace)