Add some basic Python bindings

.github/workflows/ci.yaml

@@ -22,6 +22,7 @@ jobs:
           libgpgme-dev
           libgtest-dev
           make
+          python3-pytest
           valgrind
         env:
           DEBIAN_FRONTEND: noninteractive

.github/workflows/python.yaml

@@ -0,0 +1,35 @@
+---
+name: Python Packaging
+
+on:  # yamllint disable-line rule:truthy
+  push:
+    tags: ['*']
+  workflow_dispatch:
+
+jobs:
+  sdist:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v5
+      - run: python -m pip install -U build
+      - run: python -m build --sdist
+      - uses: actions/upload-artifact@v4
+        with:
+          name: sdist
+          path: dist/*.tar.gz
+  wheel:
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-24.04
+            arch: x86_64
+          - os: ubuntu-24.04-arm
+            arch: aarch64
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v5
+      - uses: pypa/[email protected]
+      - uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.arch }}
+          path: ./wheelhouse/*.whl

.gitignore

@@ -1,2 +1,4 @@
-/build
+/build/
+/dist/
+/wheelhouse/
 .*.swp

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.15)
 
 project(createrepo-agent C)
 
@@ -35,6 +35,7 @@ target_link_libraries(createrepo-cache PUBLIC
 target_compile_definitions(createrepo-cache PRIVATE
   -DG_LOG_DOMAIN="CREATEREPO_CACHE")
 set_target_properties(createrepo-cache PROPERTIES
+  POSITION_INDEPENDENT_CODE ON
   SOVERSION ${CRA_VERSION_MAJOR}
   VERSION ${CRA_VERSION})
 
@@ -60,6 +61,8 @@ target_link_libraries(createrepo-agent-lib PUBLIC
   glib-2.0)
 target_compile_definitions(createrepo-agent-lib PRIVATE
   -DG_LOG_DOMAIN="CREATEREPO_AGENT")
+set_target_properties(createrepo-agent-lib PROPERTIES
+  POSITION_INDEPENDENT_CODE ON)
 
 # Executable
 add_executable(${PROJECT_NAME}
@@ -75,6 +78,73 @@ install(TARGETS ${PROJECT_NAME}
   RUNTIME DESTINATION bin
   COMPONENT bin)
 
+# Python bindings
+cmake_policy(SET CMP0094 NEW)
+set(Python_FIND_UNVERSIONED_NAMES FIRST
+  CACHE STRING "Defines how the generic names will be searched for Python")
+if(CMAKE_VERSION VERSION_LESS "3.18")
+  set(Python_COMPONENTS Interpreter Development)
+else()
+  set(Python_COMPONENTS Interpreter Development.Module)
+endif()
+find_package(Python 3 QUIET COMPONENTS ${Python_COMPONENTS})
+option(WITH_PYTHON "Build Python bindings" ${Python_FOUND})
+if(WITH_PYTHON)
+  # Find Python again, this time REQUIRED
+  find_package(Python 3 REQUIRED COMPONENTS ${Python_COMPONENTS})
+
+  python_add_library(createrepo_agent MODULE
+    src/python/client.c
+    src/python/init.c
+    src/python/server.c)
+  target_link_libraries(createrepo_agent PRIVATE
+    createrepo-agent-lib)
+
+  if(SKBUILD)
+    set(PYTHON_INSTALL_DIR ${SKBUILD_PLATLIB_DIR})
+  else()
+    # Determine package installation location
+    string(JOIN "; " PYTHON_INSTALL_DIR_CMD
+      "from os.path import sep"
+      "from sys import stdout"
+      "from sysconfig import get_path"
+      "stdout.write(get_path('platlib', vars={'base': '', 'platbase': ''}).lstrip(sep))"
+    )
+    execute_process(COMMAND ${Python_EXECUTABLE} -c "${PYTHON_INSTALL_DIR_CMD}"
+      OUTPUT_VARIABLE PYTHON_INSTALL_DIR)
+
+    set(DISTINFO_NAME "createrepo_agent-${CRA_VERSION}.dist-info")
+    set(DISTINFO_DIR "${CMAKE_CURRENT_BINARY_DIR}/${DISTINFO_NAME}")
+    file(GENERATE
+      OUTPUT "${DISTINFO_DIR}/INSTALLER"
+      CONTENT "cmake\n")
+    file(GENERATE
+      OUTPUT "${DISTINFO_DIR}/METADATA"
+      CONTENT "Metadata-Version: 1.1\nName: createrepo-agent\nVersion: ${CRA_VERSION}\n")
+    string(JOIN "\n" RECORD_CONTENT
+        "$<TARGET_FILE_NAME:createrepo_agent>,,"
+        "${DISTINFO_NAME}/INSTALLER,,"
+        "${DISTINFO_NAME}/METADATA,,"
+        "${DISTINFO_NAME}/RECORD,,"
+        "${DISTINFO_NAME}/top_level.txt,,"
+    )
+    file(GENERATE
+      OUTPUT "${DISTINFO_DIR}/RECORD"
+      CONTENT "${RECORD_CONTENT}\n")
+    file(GENERATE
+      OUTPUT "${DISTINFO_DIR}/top_level.txt"
+      CONTENT "createrepo_agent\n")
+    install(DIRECTORY ${DISTINFO_DIR}
+      DESTINATION ${PYTHON_INSTALL_DIR}
+      COMPONENT python)
+  endif()
+
+  install(TARGETS createrepo_agent
+    RUNTIME DESTINATION ${PYTHON_INSTALL_DIR}
+    LIBRARY DESTINATION ${PYTHON_INSTALL_DIR}
+    COMPONENT python)
+endif()
+
 add_subdirectory(doc)
 
 set(MEMORYCHECK_SUPPRESSIONS_FILE "${CMAKE_CURRENT_SOURCE_DIR}/test/valgrind.supp"

pyproject.toml

@@ -0,0 +1,46 @@
+[build-system]
+requires = ["scikit-build-core"]
+build-backend = "scikit_build_core.build"
+
+[project]
+name = "createrepo-agent"
+dynamic = ["version"]
+
+[project.optional-dependencies]
+test = [
+  "pytest",
+]
+
+[tool.scikit-build]
+install.components = ["python"]
+sdist.exclude = [
+  ".editorconfig",
+  ".github",
+  ".gitignore",
+  "CONTRIBUTING.md",
+]
+wheel.packages = []
+
+[tool.scikit-build.cmake.define]
+BUILD_TESTING = false
+WITH_PYTHON = true
+
+[tool.scikit-build.metadata.version]
+provider = "scikit_build_core.metadata.regex"
+input = "CMakeLists.txt"
+regex = '''
+set\(CRA_VERSION_MAJOR\s+(?P<major>\d+)\)
+set\(CRA_VERSION_MINOR\s+(?P<minor>\d+)\)
+set\(CRA_VERSION_PATCH\s+(?P<patch>\d+)\)
+'''
+result = "{major}.{minor}.{patch}"
+
+[tool.cibuildwheel]
+skip = "*-musllinux_*"
+test-extras = ["test"]
+test-command = [
+  "python -m pytest {project}/test",
+]
+
+[tool.cibuildwheel.linux]
+before-all = "dnf install -y createrepo_c-devel glib2-devel gpgme-devel libassuan-devel libgpg-error-devel"