FetchContentable cpp-pre::file - CMakeList in source tree

.github/workflows/ci.yml

@@ -0,0 +1,18 @@
+name: build 
+# This workflow is triggered on pushes to the repository.
+on: [push]
+
+jobs:
+  build: 
+    name: build-linux
+    runs-on: ubuntu-latest
+    container: tipibuild/tipi-ubuntu
+    env:
+      TIPI_CACHE_FORCE_ENABLE: ON
+      CMAKE_TIPI_PROVIDER_ENABLE: ON
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: tipi builds project 
+        run: |
+          tipi . -t linux-cxx17 --dont-upgrade --verbose --test all --use-cmakelists

CMakeLists.txt

@@ -0,0 +1,186 @@
+cmake_minimum_required(VERSION 3.27.6)
+project(cpp-pre_file VERSION "0.0.1")
+
+enable_testing()
+
+# Warning as errors to ensure file quality
+string(TOUPPER "${CMAKE_CXX_COMPILER_ID}" COMPILER_IN_USE)
+if ("${COMPILER_IN_USE}" STREQUAL "GNU" OR "${COMPILER_IN_USE}" MATCHES "CLANG")
+	add_definitions(
+    -Wall
+		#-Werror
+		-Wno-unused-local-typedefs
+		-Wno-unused-variable
+  )
+endif()
+
+find_package(Threads)
+
+include (FetchContent)
+FetchContent_Declare(
+  Boost
+  GIT_REPOSITORY https://github.com/boostorg/boost.git
+  # boost 1.80
+  GIT_TAG         32da69a36f84c5255af8a994951918c258bac601
+)
+FetchContent_MakeAvailable(Boost)
+find_package(boost_filesystem CONFIG REQUIRED)
+find_package(boost_system CONFIG REQUIRED)
+find_package(boost_uuid CONFIG REQUIRED)
+
+# Define library
+add_library(file INTERFACE )
+add_library(cpp-pre_file::file ALIAS file)
+
+set(include_install_dir "include")
+
+target_include_directories(file BEFORE INTERFACE 
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}> 
+  $<INSTALL_INTERFACE:${include_install_dir}/>)
+
+target_link_libraries(file INTERFACE 
+  Boost::system Boost::filesystem Boost::uuid 
+  ${CMAKE_THREAD_LIBS_INIT}
+)
+
+
+# Targets:
+install(
+    TARGETS 
+    EXPORT "${targets_export_name}"
+    LIBRARY DESTINATION "lib"
+    ARCHIVE DESTINATION "lib"
+    RUNTIME DESTINATION "bin"
+    INCLUDES DESTINATION "${include_install_dir}"
+)
+
+add_subdirectory(tests)
+
+
+# Installing
+
+# Layout. This works for all platforms:
+#   * <prefix>/lib/cmake/<PROJECT-NAME>
+#   * <prefix>/lib/
+#   * <prefix>/include/
+set(config_install_dir "lib/cmake/${PROJECT_NAME}")
+
+set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated")
+
+# Configuration
+set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
+set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
+set(targets_export_name "${PROJECT_NAME}Targets")
+set(namespace "${PROJECT_NAME}::")
+
+# Include module with fuction 'write_basic_package_version_file'
+include(CMakePackageConfigHelpers)
+
+# Configure '<PROJECT-NAME>ConfigVersion.cmake'
+# Note: PROJECT_VERSION is used as a VERSION
+write_basic_package_version_file(
+    "${version_config}" COMPATIBILITY SameMajorVersion
+)
+
+# Configure '<PROJECT-NAME>Config.cmake'
+# Use variables:
+#   * targets_export_name
+#   * PROJECT_NAME
+configure_package_config_file(
+    "cmake/modules/Config.cmake.in"
+    "${project_config}"
+    INSTALL_DESTINATION "${config_install_dir}"
+)
+
+
+# Targets:
+install(
+    TARGETS file 
+    EXPORT "${targets_export_name}"
+    LIBRARY DESTINATION "lib"
+    ARCHIVE DESTINATION "lib"
+    RUNTIME DESTINATION "bin"
+    INCLUDES DESTINATION "${include_install_dir}"
+)
+
+# Headers:
+install(
+    DIRECTORY pre
+    DESTINATION "${include_install_dir}"
+    FILES_MATCHING PATTERN "*.[ih]*"
+    PATTERN build/ EXCLUDE
+    PATTERN "/build*" EXCLUDE 
+    PATTERN ".git/*" EXCLUDE 
+    PATTERN ".tipistore/*" EXCLUDE 
+    PATTERN "doc/*" EXCLUDE 
+    PATTERN "node_modules/*" EXCLUDE 
+)
+
+# Config
+#   * <prefix>/lib/cmake/file/fileConfig.cmake
+#   * <prefix>/lib/cmake/file/fileConfigVersion.cmake
+#   * <prefix>/lib/cmake/file/fileTargets.cmake
+install(
+    FILES "${project_config}" "${version_config}"
+    DESTINATION "${config_install_dir}"
+)
+
+## This overcomes the issue with "cpp-pre_file::file depends on targets 
+## that are in no EXPORT sets in plain cmake non cmake-tipi-provider contexts
+#set(BOOST_TARGETS boost_filesystem boost_system boost_uuid 
+#  boost_assert
+#  boost_atomic
+#  boost_config
+#  boost_container_hash
+#  boost_core
+#  boost_detail
+#  boost_io
+#  boost_iterator
+#  boost_move
+#  boost_numeric_conversion
+#  boost_predef
+#  boost_random
+#  boost_scope
+#  boost_smart_ptr
+#  boost_static_assert
+#  boost_throw_exception
+#  boost_tti
+#  boost_type_traits
+#  boost_variant2
+#  boost_winapi
+#  boost_align
+#  boost_array
+#  boost_concept_check
+#  boost_conversion
+#  boost_describe
+#  boost_dynamic_bitset
+#  boost_function_types
+#  boost_fusion
+#  boost_integer
+#  boost_mp11
+#  boost_mpl
+#  boost_optional
+#  boost_preprocessor
+#  boost_range
+#  boost_utility
+#  boost_tuple
+#  boost_typeof
+#  boost_functional
+#  boost_regex
+#  boost_function
+#  boost_bind
+#)
+#install(
+#    TARGETS ${BOOST_TARGETS}
+#    EXPORT "${targets_export_name}"
+#    LIBRARY DESTINATION "lib"
+#    ARCHIVE DESTINATION "lib"
+#    RUNTIME DESTINATION "bin"
+#    INCLUDES DESTINATION "${include_install_dir}"
+#)
+
+install(
+    EXPORT "${targets_export_name}"
+    NAMESPACE "${namespace}"
+    DESTINATION "${config_install_dir}"
+)

cmake/modules/Config.cmake.in

@@ -0,0 +1,7 @@
+
+@PACKAGE_INIT@
+
+include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
+check_required_components("@PROJECT_NAME@")
+
+

tests/CMakeLists.txt

@@ -0,0 +1,19 @@
+# To modify this, edit the template:
+# - .tipi/CMakeLists.subdir-tests.txt.tpl
+# - tests/CMakeLists.subdir-tests.txt.tpl
+#
+# The templates can be generated using the 'tipi cmaketpl' command
+
+
+  # hash
+  add_executable(hash hash.cpp )
+  set_target_properties(hash PROPERTIES OUTPUT_NAME hash)
+  target_link_libraries(hash cpp-pre_file::file)
+
+  if (DEFINED EMSCRIPTEN)
+    add_test(NAME hash COMMAND node --experimental-wasm-threads --experimental-wasm-bulk-memory $<TARGET_FILE:hash>)
+  else() 
+    add_test(NAME hash COMMAND "$<TARGET_FILE:hash>")
+  endif()
+
+

tests/hash.cpp

@@ -49,7 +49,7 @@ int main() {
     std::cout << "Modifying '" << testdata_path << "' & hashing again \n"
         << " - computed: " << hashed_modified << std::endl;
 
-    assert(hashed_modified == hashed_initial);
+    assert(hashed_modified != hashed_initial);
 
     std::cout << " [PASS]" << std::endl;