new project structure

.appveyor.yml

@@ -3,6 +3,7 @@ shallow_clone: true
 image:
   - Visual Studio 2015
   - Visual Studio 2017
+  - Visual Studio 2019 Preview
 platform:
   - Win32
   - x64

.travis.yml

@@ -66,5 +66,16 @@ matrix:
       after_success: ./scripts/upload_coverage.sh
 before_install:
   - eval "${MATRIX_EVAL}"
+  - if [ "$TRAVIS_OS_NAME" == 'osx' ]; then
+    brew update;
+    brew upgrade cmake;
+    brew install git-lfs;
+    fi
+  - if [ "$TRAVIS_OS_NAME" == 'linux' ]; then
+    mkdir $HOME/cmake;
+    export PATH="$HOME/cmake/bin:$PATH";
+    travis_retry wget -q https://cmake.org/files/v3.11/cmake-3.11.4-Linux-x86_64.sh;
+    sh cmake-3.11.4-Linux-x86_64.sh --prefix=$HOME/cmake --exclude-subdir --skip-license;
+    fi
 script:
   - ./scripts/build_all.sh

CMakeLists.txt

@@ -1,51 +1,26 @@
-cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
-project(ecs)
+# 3.8 version is required for `cxx_std_14`
+cmake_minimum_required(VERSION 3.8 FATAL_ERROR)
 
-#
-# coverage mode
-#
-
-option(ECS_BUILD_WITH_COVERAGE "Build with coverage" OFF)
-if(ECS_BUILD_WITH_COVERAGE AND (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang"))
-    add_definitions(-DECS_BUILD_WITH_COVERAGE)
-    set(ECS_COVERAGE_FLAGS "--coverage")
-    set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${ECS_COVERAGE_FLAGS}")
-    set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${ECS_COVERAGE_FLAGS}")
-    set(CMAKE_LINKER_FLAGS_DEBUG "${CMAKE_LINKER_FLAGS_DEBUG} ${ECS_COVERAGE_FLAGS}")
+if(NOT DEFINED PROJECT_NAME)
+    set(BUILD_AS_STANDALONE ON)
 endif()
 
-#
-# sanitizer mode
-#
+project(ecs.hpp)
 
-option(ECS_BUILD_WITH_SANITIZER "Build with sanitizer" OFF)
-if(ECS_BUILD_WITH_SANITIZER AND (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang"))
-    add_definitions(-DECS_BUILD_WITH_SANITIZER)
-    set(ECS_SANITIZER_FLAGS "-fno-omit-frame-pointer -fsanitize=address")
-    set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${ECS_SANITIZER_FLAGS}")
-    set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${ECS_SANITIZER_FLAGS}")
-    set(CMAKE_LINKER_FLAGS_DEBUG "${CMAKE_LINKER_FLAGS_DEBUG} ${ECS_SANITIZER_FLAGS}")
+add_library(${PROJECT_NAME} INTERFACE)
+target_include_directories(${PROJECT_NAME} INTERFACE headers)
+target_compile_features(${PROJECT_NAME} INTERFACE cxx_std_14)
+
+if(BUILD_AS_STANDALONE)
+    option(BUILD_WITH_UNBENCH "Build with benchmarks" OFF)
+    if(BUILD_WITH_UNBENCH)
+        enable_testing()
+        add_subdirectory(unbench)
+    endif()
+
+    option(BUILD_WITH_UNTESTS "Build with unit tests" ON)
+    if(BUILD_WITH_UNTESTS)
+        enable_testing()
+        add_subdirectory(untests)
+    endif()
 endif()
-
-#
-# tests executable
-#
-
-file(GLOB test_sources "*.cpp" "*.hpp")
-add_executable(${PROJECT_NAME} ${test_sources})
-
-set_target_properties(${PROJECT_NAME} PROPERTIES
-    CXX_STANDARD 14
-    CXX_STANDARD_REQUIRED YES
-    CXX_EXTENSIONS NO)
-
-target_compile_options(${PROJECT_NAME}
-    PRIVATE
-    $<$<CXX_COMPILER_ID:MSVC>:
-        /W4>
-    PRIVATE
-    $<$<OR:$<CXX_COMPILER_ID:GNU>,$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>:
-        -Wall -Wextra -Wpedantic>)
-
-enable_testing()
-add_test(${PROJECT_NAME} ${PROJECT_NAME})

README.md

@@ -25,10 +25,17 @@
 
 ## Installation
 
-[ecs.hpp][ecs] is a single header library. All you need to do is copy the header file into your project and include this file:
+[ecs.hpp][ecs] is a header-only library. All you need to do is copy the headers files from `headers` directory into your project and include them:
 
 ```cpp
-#include "ecs.hpp"
+#include "ecs_hpp/ecs.hpp"
+```
+
+Also, you can add the root repository directory to your [cmake](https://cmake.org) project:
+
+```cmake
+add_subdirectory(external/ecs.hpp)
+target_link_libraries(your_project_target ecs.hpp)
 ```
 
 ## Basic usage

scripts/upload_coverage.sh

@@ -4,7 +4,7 @@ set -e
 BUILD_DIR=`dirname "$BASH_SOURCE"`/../build
 mkdir -p $BUILD_DIR/coverage
 cd $BUILD_DIR/coverage
-cmake -DCMAKE_BUILD_TYPE=Debug -DECS_BUILD_WITH_COVERAGE=ON ../..
+cmake -DCMAKE_BUILD_TYPE=Debug -DBUILD_WITH_COVERAGE=ON ../..
 cmake --build . -- -j8
 
 lcov -d . -z

unbench/CMakeLists.txt

@@ -0,0 +1,34 @@
+# 3.11 version is required for `FetchContent`
+cmake_minimum_required(VERSION 3.11 FATAL_ERROR)
+
+project(ecs.hpp.unbench)
+
+#
+# google benchmark
+#
+
+set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
+
+include(FetchContent)
+FetchContent_Declare(
+    gbench
+    GIT_REPOSITORY https://github.com/google/benchmark)
+
+FetchContent_GetProperties(gbench)
+if(NOT gbench_POPULATED)
+    FetchContent_Populate(gbench)
+    add_subdirectory(${gbench_SOURCE_DIR} ${gbench_BINARY_DIR})
+endif()
+
+#
+# benchmark executable
+#
+
+file(GLOB UNBENCH_SOURCES "*.cpp" "*.hpp")
+add_executable(${PROJECT_NAME} ${UNBENCH_SOURCES})
+
+target_link_libraries(${PROJECT_NAME}
+    benchmark_main
+    ecs.hpp)
+
+add_test(${PROJECT_NAME} ${PROJECT_NAME})

unbench/bench_base.hpp

@@ -0,0 +1,13 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/ecs.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#pragma once
+
+#include <benchmark/benchmark.h>
+
+namespace ecs_hpp_unbench
+{
+}

unbench/ecs_join_bench.cpp

@@ -0,0 +1,11 @@
+/*******************************************************************************
+ * This file is part of the "https://github.com/blackmatov/ecs.hpp"
+ * For conditions of distribution and use, see copyright notice in LICENSE.md
+ * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
+ ******************************************************************************/
+
+#include "bench_base.hpp"
+using namespace ecs_hpp_unbench;
+
+#include "ecs.hpp"
+namespace ecs = ecs_hpp;

untests/CMakeLists.txt

@@ -0,0 +1,32 @@
+# 3.11 version is required for `FetchContent`
+cmake_minimum_required(VERSION 3.11 FATAL_ERROR)
+
+project(flat.hpp.untests)
+
+set(CATCH_BUILD_TESTING OFF CACHE BOOL "" FORCE)
+
+include(FetchContent)
+FetchContent_Declare(
+    catch2
+    GIT_REPOSITORY https://github.com/catchorg/catch2)
+
+FetchContent_GetProperties(catch2)
+if(NOT catch2_POPULATED)
+    FetchContent_Populate(catch2)
+    add_subdirectory(${catch2_SOURCE_DIR} ${catch2_BINARY_DIR})
+endif()
+
+option(BUILD_WITH_COVERAGE "Build with coverage" OFF)
+if(BUILD_WITH_COVERAGE AND (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang"))
+    set(COVERAGE_FLAGS "--coverage")
+    set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${COVERAGE_FLAGS}")
+    set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${COVERAGE_FLAGS}")
+    set(CMAKE_LINKER_FLAGS_DEBUG "${CMAKE_LINKER_FLAGS_DEBUG} ${COVERAGE_FLAGS}")
+endif()
+
+file(GLOB UNTESTS_SOURCES "*.cpp" "*.hpp")
+add_executable(${PROJECT_NAME} ${UNTESTS_SOURCES})
+target_link_libraries(${PROJECT_NAME}
+    Catch2
+    ecs.hpp)
+add_test(${PROJECT_NAME} ${PROJECT_NAME})

untests/catch_main.cpp

@@ -1,9 +1,9 @@
 /*******************************************************************************
  * This file is part of the "https://github.com/blackmatov/ecs.hpp"
  * For conditions of distribution and use, see copyright notice in LICENSE.md
- * Copyright (C) 2018 Matvey Cherevko
+ * Copyright (C) 2018-2019 Matvey Cherevko
  ******************************************************************************/
 
 #define CATCH_CONFIG_MAIN
 #define CATCH_CONFIG_FAST_COMPILE
-#include "catch.hpp"
+#include <catch2/catch.hpp>

untests/ecs_tests.cpp

@@ -5,9 +5,9 @@
  ******************************************************************************/
 
 #define CATCH_CONFIG_FAST_COMPILE
-#include "catch.hpp"
+#include <catch2/catch.hpp>
 
-#include "ecs.hpp"
+#include <ecs_hpp/ecs.hpp>
 namespace ecs = ecs_hpp;
 
 namespace