Added support for CxxWrap 0.15.x and several improvements.

Code for CxxWrap versions 0.15.x to generate differs from code for vesions
0.14.x, due to a change in the API. Wrapping of STL vectors of object pointers
do not work with version 0.15.0.  More details in
JuliaInterop/CxxWrap.jl#419. The unit tests and the
ROOT example that use such vector are conifgure to use 0.14.x version for now.

The CxxWrap version the code should be generated can be selected using the
new `cxxwrap_version` configuration parameter.

Several other changes:

  o new --get command line option to retrieve values of some parameters;

  o new --add-cfg command line option to configure parameter normally
    set in the .wit configuration file;

  o fixed generation of random uuid;

  o add check of the verions of the libcxxwrap when compiling and when running
  the code.

  o Cleanup Julia package dependencies installation and version handling;
    Removed project setting from runtests.jl which is not needed anymore, as
    each test runs within its own temporary Julia project.

CMakeLists.txt

@@ -99,6 +99,7 @@ add_executable(wrapit
    src/TypeRcd.cpp
    src/TypeMapper.cpp
    src/utils.cpp
+   src/cxxwrap_version.cpp
    src/uuid_utils.cpp
    src/libclang-ext.cpp
    src/FunctionWrapper.cpp

doc/config.md

@@ -22,6 +22,11 @@ include_dirs        = [ "." ]
 # See clang -std= option
 # Possible values: "c++11", "c++14", "c++17", and "c++20"
 cxx-std             = "c++17"
+
+# Version of CxxWrap the code must be generated for.
+# Pay attention to quote the string. E.g, "0.14"
+# If empty, assume latest supported one.
+cxxwrap_version     = ""
 ```
 
 ### Extra options to control the generated code organisation

examples/ex001-HelloWorld/CMakeLists.txt

@@ -5,33 +5,8 @@ project(ex001-HelloWorld)
 set(CMAKE_MACOSX_RPATH 1)
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/${CMAKE_PROJECT_NAME}/deps")
 
-# Path for CxxWrap cmake files:
-
-find_program(PRINT_CXXWRAP_PATH print-cxxwrap-path.jl
-  PATHS "${CMAKE_CURRENT_LIST_DIR}/../../buildtools")
-
-if(PRINT_CXXWRAP_PATH STREQUAL PRINT_CXXWRAP_PATH-NOTFOUND)
-  message(FATAL_ERROR "Failed to find the print-cxxwarp-path.jl build tool.")
-endif()
-
-execute_process(
-  COMMAND "${PRINT_CXXWRAP_PATH}"
-  OUTPUT_STRIP_TRAILING_WHITESPACE
-  OUTPUT_VARIABLE CXXWRAP_PREFIX
-  RESULT_VARIABLE result)
-
-if(NOT result EQUAL 0)
-  message(FATAL_ERROR "Execution of ${PRINT_CXXWRAP_PATH} failed")
-endif()
-
-list(APPEND CMAKE_PREFIX_PATH ${CXXWRAP_PREFIX})
-
-find_package(JlCxx)
-get_target_property(JlCxx_location JlCxx::cxxwrap_julia LOCATION)
-get_filename_component(JlCxx_location ${JlCxx_location} DIRECTORY)
-set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib;${JlCxx_location}")
-
-message(STATUS "Found JlCxx at ${JlCxx_location}")
+# julia is used to retrieve the CxxWrap library paths
+find_program(JULIA julia REQUIRED)
 
 set(WRAPIT_VERBOSITY 1 CACHE STRING "Define verbosity level of the wrapit command. An integer, 0 for a quiet mode, 1 for a normal mode, higher numbers for a verbosity that increases with the number.")
 
@@ -46,14 +21,81 @@ else()
 endif()
 
 set(WRAPIT_WIT_FILE "${CMAKE_SOURCE_DIR}/Hello.wit")
-set(WRAPPER_MODULE "Hello")
+message(STATUS "Wrapit configuration file: ${WRAPIT_WIT_FILE}")
+
+execute_process(
+  COMMAND ${WRAPIT} --get module_name ${WRAPIT_WIT_FILE}
+  OUTPUT_STRIP_TRAILING_WHITESPACE
+  OUTPUT_VARIABLE WRAPPER_MODULE
+  RESULT_VARIABLE result)
+
+if(NOT result EQUAL 0)
+  message(FATAL_ERROR "Failed to retrieve the Julia module name parameter using the configuration file ${WRAPIT_WIT_FILE}.")
+endif()
+
+
 set(WRAPPER_LIB jl${WRAPPER_MODULE})
 set(WRAPPER_JULIA_PACKAGE_DIR ${WRAPPER_MODULE})
 set(WRAPPER_JULIA_PACKAGE_FILE ${WRAPPER_MODULE}.jl)
 
+execute_process(
+  COMMAND ${JULIA} "--project=${CMAKE_BINARY_DIR}" -e "import TOML; print(get(TOML.parse(open(\"${WRAPIT_WIT_FILE}\")), \"cxxwrap_version\", \"\"));"
+  OUTPUT_STRIP_TRAILING_WHITESPACE
+  OUTPUT_VARIABLE CXXWRAP_REQUESTED_VERSION
+  RESULT_VARIABLE result
+  )
+
+if(NOT result EQUAL 0)
+  message(FATAL_ERROR "Failed to parse ${WRAPIT_WIT_FILE}")
+endif()
+
+if("${CXXWRAP_REQUESTED_VERSION}" STREQUAL "")
+execute_process(
+    COMMAND ${JULIA} --project=${CMAKE_BINARY_DIR} -e "import Pkg; Pkg.add(\"CxxWrap\"); import CxxWrap; print(pkgversion(CxxWrap));"
+  OUTPUT_VARIABLE CXXWRAP_INSTALLED_VERSION
+  RESULT_VARIABLE result
+)
+  #if no CxxWrap version requirement was specified in the .wit file,
+  #we align it to the version that was installed
+  set(WRAPIT_OPT --add-cfg "cxxwrap_version=\"${CXXWRAP_INSTALLED_VERSION}\"")
+  message(STATUS ${WRAPIT})
+else()
+execute_process(
+    COMMAND ${JULIA} --project=${CMAKE_BINARY_DIR} -e "import Pkg; import CxxWrap; Pkg.add(name=\"CxxWrap\", version=\"${CXXWRAP_REQUESTED_VERSION}\"); Pkg.resolve(); print(pkgversion(CxxWrap));"
+  OUTPUT_VARIABLE CXXWRAP_INSTALLED_VERSION
+  RESULT_VARIABLE result)
+endif()
+
+if(NOT result EQUAL 0)
+  message(FATAL_ERROR "Failed to install CxxWrap")
+elseif("${CXXWRAP_REQUESTED_VERSION}" STREQUAL "")
+  message(STATUS "CxxWrap version requested to be compatible with any version, using v${CXXWRAP_INSTALLED_VERSION}")
+else()
+  message(STATUS "CxxWrap version requested to be compatible with ${CXXWRAP_REQUESTED_VERSION}, using version: ${CXXWRAP_INSTALLED_VERSION}")
+endif()
+
+execute_process(
+  COMMAND "${JULIA}" --project=${CMAKE_BINARY_DIR} -e "import CxxWrap; print(CxxWrap.prefix_path())"
+  OUTPUT_STRIP_TRAILING_WHITESPACE
+  OUTPUT_VARIABLE CXXWRAP_PREFIX
+  RESULT_VARIABLE result)
+
+if(NOT result EQUAL 0)
+  message(FATAL_ERROR "Failed to retrieve CxxWrap library path")
+else()
+  message(STATUS "CxxWrap library path prefix: ${CXXWRAP_PREFIX}")
+endif()
+
+find_package(JlCxx PATHS ${CXXWRAP_PREFIX})
+
+get_target_property(JlCxx_location JlCxx::cxxwrap_julia LOCATION)
+get_filename_component(JlCxx_location ${JlCxx_location} DIRECTORY)
+set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib;${JlCxx_location}")
+
+
 # Generate the wrapper code. This is done at configure time.
 execute_process(
-  COMMAND "${WRAPIT}" -v "${WRAPIT_VERBOSITY}" --force --update --cmake --output-prefix "${CMAKE_BINARY_DIR}" "${WRAPIT_WIT_FILE}"
+  COMMAND "${WRAPIT}" ${WRAPIT_OPT} -v "${WRAPIT_VERBOSITY}" --force --update --cmake --output-prefix "${CMAKE_BINARY_DIR}" "${WRAPIT_WIT_FILE}"
   WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
   COMMAND_ECHO STDERR
   RESULT_VARIABLE result)

examples/ex001-HelloWorld/Makefile

@@ -9,7 +9,16 @@ CXXFLAGS += $(patsubst -std=gnu%,,$(shell $(JL_SHARE)/julia-config.jl --cflags))
 LDFLAGS  += $(shell $(JL_SHARE)/julia-config.jl --ldflags)
 LDLIBS   += $(shell $(JL_SHARE)/julia-config.jl --ldlibs)
 WRAPIT = $(shell which wrapit)
-CXXWRAP_PREFIX=$(shell ../../buildtools/print-cxxwrap-path.jl)
+WIT_FILE = Hello.wit
+CXXWRAP_VERSION=$(shell julia -e "import TOML; print(get(TOML.parse(open(\"$(WIT_FILE)\")), \"cxxwrap_version\", \"\"));")
+
+ifeq ($(CXXWRAP_VERSION),)
+CXXWRAP_PREFIX=$(shell mkdir -p $(BUILD_DIR); julia --project=$(BUILD_DIR) -e "import Pkg; Pkg.add(\"CxxWrap\"); Pkg.resolve(); import CxxWrap; print(CxxWrap.prefix_path())")
+CXXWRAP_VERSION:=$(shell julia --project=${BUILD_DIR} -e "import CxxWrap; print(pkgversion(CxxWrap));")
+WRAPIT_OPT=--add-cfg cxxwrap_version=\"$(CXXWRAP_VERSION)\"
+else
+CXXWRAP_PREFIX=$(shell mkdir -p $(BUILD_DIR); julia --project=$(BUILD_DIR) -e "import Pkg; Pkg.add(name=\"CxxWrap\", version=\"$(CXXWRAP_VERSION)\"); Pkg.resolve(); import CxxWrap; print(CxxWrap.prefix_path())")
+endif
 
 CXXWRAP_CPPFLAGS=-I $(CXXWRAP_PREFIX)/include -I . --std=c++17
 LDLIBS +=-L $(CXXWRAP_PREFIX)/lib -lcxxwrap_julia -lcxxwrap_julia_stl
@@ -47,7 +56,7 @@ clean:
 	-$(RM) -r $(PRODUCTS)
 
 $(BUILD_DIR)/libHello/src/jl%.cxx: %.wit
-	$(WRAPIT) --force --output-prefix $(BUILD_DIR) $<
+	$(WRAPIT) $(WRAPIT_OPT) --force --output-prefix $(BUILD_DIR) $<
 
 $(BUILD_DIR)/%.o: $(BUILD_DIR)/libHello/src/%.cxx
 	-mkdir -p $(BUILD_DIR)

examples/ex001-HelloWorld/install.jl

@@ -8,7 +8,7 @@ build_location = "build"
 wrapper_module = "Hello" 
 
 #Generate the wrapper code and compile:
-run(`cmake -B $build_location`)
+run(`cmake --fresh -B $build_location`)
 run(`cmake --build $build_location`)
 
 #Install the wrapport module:

examples/ex002-ROOT/Makefile

@@ -1,3 +1,4 @@
+
 BUILD_DIR=build
 
 JL_SHARE = $(shell julia -e 'print(joinpath(Sys.BINDIR, Base.DATAROOTDIR, "julia"))')
@@ -7,7 +8,16 @@ CXXFLAGS += $(patsubst -std=gnu%,,$(shell $(JL_SHARE)/julia-config.jl --cflags))
 LDFLAGS  += $(shell $(JL_SHARE)/julia-config.jl --ldflags)
 LDLIBS   += $(shell $(JL_SHARE)/julia-config.jl --ldlibs)
 WRAPIT = $(shell which wrapit)
-CXXWRAP_PREFIX=$(shell ../../buildtools/print-cxxwrap-path.jl)
+WIT_FILE = ROOT.wit
+CXXWRAP_VERSION=$(shell julia -e "import TOML; print(get(TOML.parse(open(\"$(WIT_FILE)\")), \"cxxwrap_version\", \"\"));")
+
+ifeq ($(CXXWRAP_VERSION),)
+CXXWRAP_PREFIX=$(shell mkdir -p $(BUILD_DIR); julia --project=$(BUILD_DIR) -e "import Pkg; Pkg.add(\"CxxWrap\"); Pkg.resolve(); import CxxWrap; print(CxxWrap.prefix_path())")
+CXXWRAP_VERSION:=$(shell julia --project=${BUILD_DIR} -e "import CxxWrap; print(pkgversion(CxxWrap));")
+WRAPIT_OPT=--add-cfg cxxwrap_version=\"$(CXXWRAP_VERSION)\"
+else
+CXXWRAP_PREFIX=$(shell mkdir -p $(BUILD_DIR); julia --project=$(BUILD_DIR) -e "import Pkg; Pkg.add(name=\"CxxWrap\", version=\"$(CXXWRAP_VERSION)\"); Pkg.resolve(); import CxxWrap; print(CxxWrap.prefix_path())")
+endif
 
 CXXWRAP_CPPFLAGS=-I $(CXXWRAP_PREFIX)/include -I . --std=c++17
 LDLIBS   += $(shell $(JL_SHARE)/julia-config.jl --ldlibs)
@@ -72,24 +82,27 @@ run_demo2: all
 	LD_LIBRARY_PATH=libROOT:$(shell root-config --libdir) JULIA_LOAD_PATH=.:@:@v#.#:@stdlib julia -i demo_TGraph.jl
 
 test: all
-	LD_LIBRARY_PATH=libROOT:$(shell root-config --libdir) JULIA_LOAD_PATH=:`pwd`/build/ROOT/src julia demo_ROOT.jl
+	LD_LIBRARY_PATH=libROOT:$(shell root-config --libdir) \
+JULIA_LOAD_PATH=`pwd`/build/ROOT/src:$(JULIA_LOAD_PATH): julia --project=$(BUILD_DIR) demo_ROOT.jl
 	cmp demo_ROOT.png demo_ROOT-ref.png
-	LD_LIBRARY_PATH=libROOT:$(shell root-config --libdir) JULIA_LOAD_PATH=:`pwd`/build/ROOT/src julia demo_TGraph.jl
+	LD_LIBRARY_PATH=libROOT:$(shell root-config --libdir) \
+JULIA_LOAD_PATH=`pwd`/build/ROOT/src:$(JULIA_LOAD_PATH): julia --project=$(BUILD_DIR) demo_TGraph.jl
 	cmp demo_TGraph.png demo_TGraph-ref.png
-	LD_LIBRARY_PATH=libROOT:$(shell root-config --libdir) JULIA_LOAD_PATH=:`pwd`/build/ROOT/src julia TTree_examples/write_tree1.jl \
-&& JULIA_LOAD_PATH=:`pwd`/build/ROOT/src julia TTree_examples/read_tree1.jl
-	LD_LIBRARY_PATH=libROOT:$(shell root-config --libdir) JULIA_LOAD_PATH=:`pwd`/build/ROOT/src julia TTree_examples/write_tree2.jl \
-&& JULIA_LOAD_PATH=:`pwd`/build/ROOT/src julia TTree_examples/read_tree2.jl
-	LD_LIBRARY_PATH=libROOT:$(shell root-config --libdir) JULIA_LOAD_PATH=:`pwd`/build/ROOT/src julia TTree_examples/write_tree3.jl \
-&& JULIA_LOAD_PATH=:`pwd`/build/ROOT/src julia TTree_examples/read_tree3.jl
+	LD_LIBRARY_PATH=libROOT:$(shell root-config --libdir) \
+JULIA_LOAD_PATH=`pwd`/build/ROOT/src:$(JULIA_LOAD_PATH): julia --project=$(BUILD_DIR) TTree_examples/write_tree1.jl \
+&& JULIA_LOAD_PATH=`pwd`/build/ROOT/src:$(JULIA_LOAD_PATH): julia --project=$(BUILD_DIR) TTree_examples/read_tree1.jl
+	LD_LIBRARY_PATH=libROOT:$(shell root-config --libdir) \
+JULIA_LOAD_PATH=`pwd`/build/ROOT/src:$(JULIA_LOAD_PATH): julia --project=$(BUILD_DIR) TTree_examples/write_tree2.jl \
+&& JULIA_LOAD_PATH=`pwd`/build/ROOT/src:$(JULIA_LOAD_PATH): julia --project=$(BUILD_DIR) -e 'import Pkg; Pkg.activate(;temp=true); Pkg.add("UnROOT"); include("TTree_examples/read_tree2.jl")'
+	LD_LIBRARY_PATH=libROOT:$(shell root-config --libdir) \
+JULIA_LOAD_PATH=`pwd`/build/ROOT/src:$(JULIA_LOAD_PATH): julia --project=$(BUILD_DIR) TTree_examples/write_tree3.jl \
+&& JULIA_LOAD_PATH=`pwd`/build/ROOT/src:$(JULIA_LOAD_PATH): julia --project=$(BUILD_DIR) TTree_examples/read_tree3.jl
 
 %/libROOT/src/generated_cxx %/ROOT/Project.toml %/ROOT/src/ROOT-export.jl: %/ROOT-generated.wit jlROOT-veto.h $(WRAPIT) TBranchPtr.h Templates.h
 	$(MAKE) $*/ROOT-generated.wit
-	$(WRAPIT) --force --update --output-prefix $* $<
+	$(WRAPIT) $(WRAPIT_OPT) --force --update --output-prefix $* $<
 	$(eval GENERATED_CXX:=$(file < $(BUILD_DIR)/libROOT/src/generated_cxx))
 	$(eval OBJS:=$(addprefix $(BUILD_DIR)/libROOT/build/, $(patsubst %.cxx,%.o, $(GENERATED_CXX))))
-#	cp -a TBranchPtr.h $(BUILD_DIR)/libROOT/src
-
 
 $(BUILD_DIR)/libROOT/build/%.o: $(BUILD_DIR)/libROOT/src/%.cxx $(BUILD_DIR)
 	[ -d $(BUILD_DIR)/libROOT/build ] || mkdir -p $(BUILD_DIR)/libROOT/build

examples/ex002-ROOT/ROOT.wit

@@ -16,6 +16,9 @@ veto_list           = "jlROOT-veto.h"
 
 fields_and_variables = false
 
+# Currently not working with CxxWrap 0.15.0, use 0.14.x
+cxxwrap_version = "0.14"
+
 #auto_veto           = false
 
 vetoed_copy_ctor_classes = [ "TTreeReader", "RDataFrame" ]