Add option to provide thirdparty dependencies externally

CMakeLists.txt

@@ -6,6 +6,8 @@ endif(COMMAND cmake_policy)
 cmake_minimum_required (VERSION 3.16)
 project( val3dity )
 
+option(VAL3DITY_LIBRARY "Build val3dity as a library instead of an executable." OFF)
+option(VAL3DITY_USE_INTERNAL_DEPS "Use the thirdparty dir that ship with val3dity (for pugixml, nlohmann-json, spdlog and tclap). Turn off in case you want to provide these dependencies yourself." ON)
 
 add_definitions(-std=c++17)
 
@@ -57,27 +59,66 @@ else()
   message( SEND_ERROR "val3dity requires the GEOS library" )
 endif()
 
-#include_directories( ${GEOS_INCLUDE_DIR} )
-include_directories( ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty )
+if ( VAL3DITY_USE_INTERNAL_DEPS )
+  message(STATUS "Using internal dependencies")
 
-FILE(GLOB_RECURSE THIRDPARTY thirdparty/*.cpp)
-add_library(val3dity_thirdparty STATIC ${THIRDPARTY})
+  FILE(GLOB_RECURSE THIRDPARTY ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/*.cpp)
+  add_library(val3dity_thirdparty STATIC ${THIRDPARTY})
+  target_include_directories(val3dity_thirdparty PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/pugixml)
+  set_property(TARGET val3dity_thirdparty PROPERTY POSITION_INDEPENDENT_CODE ON)
+else()
+  message(STATUS "Using external dependencies")
+  # nlohmann
+  find_package(nlohmann_json CONFIG REQUIRED)
+  # spdlog
+  find_package(spdlog CONFIG REQUIRED)
+  # pugixml
+  find_package(pugixml CONFIG REQUIRED)
+
+  # Find TCLAP's include path using find_path (tclap provides no cmake target)
+  find_path(TCLAP_INCLUDE_DIR "tclap/CmdLine.h")
+
+  if (TCLAP_INCLUDE_DIR)
+      message(STATUS "Found TCLAP: ${TCLAP_INCLUDE_DIR}")
+  else()
+      message(FATAL_ERROR "TCLAP not found. Make sure it is installed via eg. vcpkg.")
+  endif()
+endif()
 
+# Create an object file for the stuff that is shared between library and executable
 FILE(GLOB SRC_FILES src/*.cpp)
+list(REMOVE_ITEM SRC_FILES ${CMAKE_CURRENT_SOURCE_DIR}/src/main.cpp)
+list(REMOVE_ITEM SRC_FILES ${CMAKE_CURRENT_SOURCE_DIR}/src/val3dity.cpp)
+
+add_library(val3dity_core OBJECT ${SRC_FILES})
+
+target_link_libraries(val3dity_core 
+  PUBLIC
+  CGAL::CGAL
+  PRIVATE
+  CGAL::Eigen3_support
+  GEOS::geos_c 
+)
+if ( VAL3DITY_USE_INTERNAL_DEPS )
+  target_link_libraries(val3dity_core PUBLIC val3dity_thirdparty)
+else()
+  target_link_libraries(val3dity_core PUBLIC nlohmann_json::nlohmann_json spdlog::spdlog PRIVATE pugixml::static)
+endif()
 
 if ( VAL3DITY_LIBRARY )
   message(STATUS "Building val3dity library")
-  list(REMOVE_ITEM SRC_FILES src/main.cpp)
-  add_library(val3dity STATIC ${SRC_FILES})
-  target_include_directories(val3dity PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty)
-  set_property(TARGET val3dity_thirdparty PROPERTY POSITION_INDEPENDENT_CODE ON)
+
+  add_library(val3dity STATIC ${CMAKE_CURRENT_SOURCE_DIR}/src/val3dity.cpp)
+  target_include_directories(val3dity PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src)
+  target_link_libraries(val3dity PUBLIC val3dity_core)
   set_property(TARGET val3dity PROPERTY POSITION_INDEPENDENT_CODE ON)
 else()
   message(STATUS "Building val3dity executable")
-  list(REMOVE_ITEM SRC_FILES src/val3dity.cpp)
-  add_executable(val3dity ${SRC_FILES})
-endif()
-
-target_link_libraries(val3dity CGAL::CGAL CGAL::Eigen3_support GEOS::geos_c val3dity_thirdparty Boost::filesystem)
-
-install(TARGETS val3dity DESTINATION bin)
+  add_executable(val3dity ${CMAKE_CURRENT_SOURCE_DIR}/src/main.cpp)
+  target_link_libraries(val3dity PRIVATE val3dity_core Boost::filesystem)
+  install(TARGETS val3dity DESTINATION bin)
+
+  if ( NOT VAL3DITY_USE_INTERNAL_DEPS )
+    target_include_directories(val3dity PRIVATE ${TCLAP_INCLUDE_DIR})
+  endif()
+endif()

src/Feature.h

@@ -31,7 +31,7 @@
 
 #include "Primitive.h"
 #include "definitions.h"
-#include "nlohmann-json/json.hpp"
+#include "nlohmann/json.hpp"
 #include <vector>
 #include <set>
 #include <string>

src/Primitive.h

@@ -30,7 +30,7 @@
 #define Primitive_h
 
 #include "definitions.h"
-#include "nlohmann-json/json.hpp"
+#include "nlohmann/json.hpp"
 #include <map>
 #include <vector>
 #include <set>

src/Surface.h

@@ -30,7 +30,7 @@
 #define Surface_h
 
 #include "definitions.h"
-#include "nlohmann-json/json.hpp"
+#include "nlohmann/json.hpp"
 #include <string>
 #include <vector>
 #include <set>

src/input.h

@@ -32,8 +32,8 @@
 #include "definitions.h"
 #include <fstream>
 #include <string>
-#include "pugixml/pugixml.hpp"
-#include "nlohmann-json/json.hpp"
+#include "pugixml.hpp"
+#include "nlohmann/json.hpp"
 
 using json = nlohmann::json;
 

src/main.cpp

@@ -38,7 +38,7 @@
 
 #include <tclap/CmdLine.h>
 #include <time.h>  
-#include "nlohmann-json/json.hpp"
+#include "nlohmann/json.hpp"
 #include <boost/filesystem.hpp>
 #include <iostream>
 #include "spdlog/spdlog.h"

src/val3dity.h

@@ -29,7 +29,7 @@
 #include "definitions.h"
 #include <iostream>
 
-#include "nlohmann-json/json.hpp"
+#include <nlohmann/json.hpp>
 
 using json = nlohmann::json;
 

vcpkg.json

@@ -11,6 +11,17 @@
         "cgal",
         "geos",
         "eigen3"
-    ]
+    ],
+    "features" : {
+        "do_not_use_internal_libs": {
+            "description": "Do not use dependencies that are shipped with val3dity.",
+            "dependencies": [
+                "spdlog",
+                "pugixml",
+                "nlohmann-json",
+                "tclap"
+            ]
+        }
+    }
 
 }