Xcode support

[springmeyer]

Many developers at Mapbox have come to rely on the XCode IDE for developing C++ on OS X. It offers some amazing productivity enhancers like code completion, code folding, a built-in GUI for static analysis and address sanitizers, and more. This is why mapbox/node-cpp-skel#13 was added to node-cpp-skel.

For hpp-skel the support will be much easier to add since we are using cmake here and cmake can autogenerate xcode files. Mirroring node-cpp-skel support will be as easy as adding:

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a81a292..aa0f8ce 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,4 +12,4 @@ include_directories(SYSTEM ${MASON_PACKAGE_catch_INCLUDE_DIRS})
 
 include_directories("${PROJECT_SOURCE_DIR}/include")
 
-add_executable(unit-tests test/test.cpp)
\ No newline at end of file
+add_executable(unit-tests ${PROJECT_SOURCE_DIR}/include test/test.cpp)
\ No newline at end of file
diff --git a/Makefile b/Makefile
index ad76d68..89b2584 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,9 @@ debug:
 test: default 
        ./build/unit-tests
 
+xcode:
+       rm -rf build/* && mkdir -p build && cd build && cmake ../ -G Xcode && open *xcodeproj
+
 coverage:
        ./scripts/coverage.sh

The change of +add_executable(unit-tests ${PROJECT_SOURCE_DIR}/include test/test.cpp) gets the headers to show up in XCode (otherwise it does not see them by default).

/cc @kkaefer

[kkaefer]

I've found that adding directories as references sometimes causes issues in Xcode (see the blue folder vs. the yellow folder). In Mapbox GL Native, we're adding all files explicitly by path, generated via a script. Then, we're calling this function on every target to sort/order the source files into folders (also works with Visual Studio):

# Generate source groups so the files are properly sorted in IDEs like Xcode.
function(create_source_groups target)
    get_target_property(sources ${target} SOURCES)
    foreach(file ${sources})
        get_filename_component(file "${file}" ABSOLUTE)
        string(REGEX REPLACE "^${CMAKE_SOURCE_DIR}/" "" group "${file}")
        get_filename_component(group "${group}" DIRECTORY)
        string(REPLACE "/" "\\" group "${group}")
        source_group("${group}" FILES "${file}")
    endforeach()
endfunction()

This results in a sidebar that looks like this:

and a breadcrumb bar that looks like this: