Merge #182 'Support installing library targets along with headers'

This makes installing of the built libraries along with their headers
possible through the CMake-standard 'install' target. It responds to the
usual DESTDIR and CMAKE_INSTALL_PREFIX variables to control installation
location.

Author: muggenhor

CHANGELOG.md

@@ -9,6 +9,7 @@ Please see [CONTRIBUTING.md](https://github.com/cucumber/cucumber/blob/master/CO
 * Better integrate Qt into buildsystem, it can now be disabled, and test it in CI ([#160](https://github.com/cucumber/cucumber-cpp/pull/160) Kamil Strzempowicz & Giel van Schijndel)
 * Support taking regex captures as arguments to the step definition's function ([#159](https://github.com/cucumber/cucumber-cpp/pull/159) Giel van Schijndel)
 * Support building as shared library on Windows and hide internal symbols on all platforms ([#147](https://github.com/cucumber/cucumber-cpp/pull/147) [Nik Reiman](https://github.com/nre-ableton))
+* Support installing library targets along with headers ([#182](https://github.com/cucumber/cucumber-cpp/pull/182) [Matthieu](https://github.com/matlo607))
 
 ### Changed
 

README.md

@@ -64,14 +64,17 @@ git submodule update
 cmake -E make_directory build
 
 # Generate Makefiles
-cmake -E chdir build cmake -DCUKE_ENABLE_EXAMPLES=on ..
+cmake -E chdir build cmake -DCUKE_ENABLE_EXAMPLES=on -DCMAKE_INSTALL_PREFIX=${prefix} ..
 
 # Build cucumber-cpp and tests
 cmake --build build
 
 # Run unit tests
 cmake --build build --target test
 
+# Run install
+cmake --build build --target install
+
 # Check implementation against common cucumber test suite
 cmake --build build --target features
 ```

appveyor.yml

@@ -48,6 +48,7 @@ test_script:
 - set CTEST_OUTPUT_ON_FAILURE=ON
 - cmake --build build --target test
 - cmake --build build --target features
+- cmake --build build --target install
 
 after_test:
 - for /r %%v in (TEST-*.xml) do curl -s -F "file=@%%v;filename=%%~nxv" https://ci.appveyor.com/api/testresults/junit/%APPVEYOR_JOB_ID%

src/CMakeLists.txt

@@ -71,8 +71,9 @@ foreach(TARGET
 )
     target_include_directories(${TARGET}
         PUBLIC
-            ${CMAKE_CURRENT_BINARY_DIR}
-            ${CMAKE_SOURCE_DIR}/include
+            $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>
+            $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/include>
+            $<INSTALL_INTERFACE:$<INSTALL_PREFIX>/include>
     )
     target_link_libraries(${TARGET}
         PUBLIC
@@ -102,3 +103,26 @@ target_link_libraries(cucumber-cpp
     PRIVATE
         Boost::program_options
 )
+
+include(GNUInstallDirs)
+install(DIRECTORY ${CUKE_INCLUDE_DIR}/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+install(
+    FILES
+        "${CMAKE_CURRENT_BINARY_DIR}/cucumber-cpp/internal/CukeExport.hpp"
+    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/cucumber-cpp/internal"
+)
+install(
+    TARGETS
+        cucumber-cpp-nomain
+        cucumber-cpp
+    EXPORT   CucumberCpp
+    ARCHIVE  DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    LIBRARY  DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME  DESTINATION ${CMAKE_INSTALL_BINDIR}
+)
+install(
+    EXPORT      CucumberCpp
+    NAMESPACE   CucumberCpp::
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake
+    FILE        CucumberCppConfig.cmake
+)

travis.sh

@@ -58,6 +58,7 @@ cmake -E chdir build cmake \
     -G Ninja \
     -DCUKE_ENABLE_EXAMPLES=on \
     -DBUILD_SHARED_LIBS=ON \
+    -DCMAKE_INSTALL_PREFIX=${HOME}/.local \
     ${CMAKE_PREFIX_PATH:+"-DCMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}"} \
     ${COVERALLS_SERVICE_NAME:+"-DCMAKE_BUILD_TYPE=Debug"} \
     ${COVERALLS_SERVICE_NAME:+"-DCMAKE_CXX_FLAGS='--coverage'"} \
@@ -109,3 +110,5 @@ if [ -f "${TEST}" ]; then
 fi
 
 killXvfb
+
+cmake --build build --target install