# Message Utilities Library

TEMPLATE = lib
TARGET   = MsgUtils
CONFIG  += shared c++20 moc
QT      += core network serialbus

QMAKE_CXXFLAGS += -Wall -Werror -Wextra

DESTDIR = $$PWD/lib

include(codegen.pri)

LEAHI_MSG_CONF = $$PWD/../../data/LeahiUnhandled.conf

GEN_INCLUDE_DIR = $$PWD/include
GEN_SRC_DIR     = $$PWD/src
GEN_DATA_DIR    = $$OUT_PWD/data

# =============================================================================
# Code generation
# =============================================================================
# 1. Message Definitions
# qmake extra-compilers map one input -> one declared output, so this drives off
# the .conf and declares the primary output; the other three get rules below.
msgdefs.name            = leahi_msgdefs
msgdefs.input           = LEAHI_MSG_CONF
msgdefs.output          = $$GEN_INCLUDE_DIR/LeahiMsgDefs.h
msgdefs.variable_out    = HEADERS
msgdefs.commands        = \
    $$shell_quote($$PROJECT_PYTHON) \
    $$MSGUTILS_SCRIPTS_DIR/GenerateMsgDefsCpp.py \
        --namespace leahi \
        --header_dir $$GEN_INCLUDE_DIR \
        --source_dir $$GEN_SRC_DIR \
        --proto \
        ${QMAKE_FILE_IN} \
        Leahi
msgdefs.depends         = \
    $$MSGUTILS_SCRIPTS_DIR/msgutils/MsgData.py \
    $$MSGUTILS_SCRIPTS_DIR/msgutils/MsgCpp.py \
    $$MSGUTILS_SCRIPTS_DIR/GenerateMsgDefsCpp.py \
    $$MSGUTILS_SCRIPTS_DIR/msgutils/templates/MsgDefs_h.jinja \
    $$MSGUTILS_SCRIPTS_DIR/msgutils/templates/MsgDefs_cpp.jinja \
    $$MSGUTILS_SCRIPTS_DIR/msgutils/templates/MsgProtoUtils_h.jinja \
    $$MSGUTILS_SCRIPTS_DIR/msgutils/templates/MsgProtoUtils_cpp.jinja
msgdefs.CONFIG         += no_link target_predeps
QMAKE_EXTRA_COMPILERS  += msgdefs

# 2. Protobuf Definitions (.proto)
proto.name              = leahi_proto
proto.input             = LEAHI_MSG_CONF
proto.output            = $$GEN_DATA_DIR/LeahiMsgDefs.proto
proto.commands          = \
    $$shell_quote($$PROJECT_PYTHON) \
    $$MSGUTILS_SCRIPTS_DIR/GenerateProtobuf.py \
        --namespace leahi \
        --output_dir $$GEN_DATA_DIR \
        ${QMAKE_FILE_IN} \
        LeahiMsgDefs.proto
proto.depends           = \
    $$MSGUTILS_SCRIPTS_DIR/msgutils/MsgData.py \
    $$MSGUTILS_SCRIPTS_DIR/msgutils/MsgProtobuf.py \
    $$MSGUTILS_SCRIPTS_DIR/GenerateProtobuf.py \
    $$MSGUTILS_SCRIPTS_DIR/msgutils/templates/MsgDefs_proto.jinja
proto.CONFIG           += no_link target_predeps
QMAKE_EXTRA_COMPILERS  += proto

# 3. Protobuf C++ (.proto -> .pb.h/.pb.cc)
protoc_cpp.name         = leahi_protoc
protoc_cpp.input        = LEAHI_MSG_CONF
protoc_cpp.output       = $$GEN_SRC_DIR/LeahiMsgDefs.pb.cc
protoc_cpp.variable_out = SOURCES
protoc_cpp.commands     = \
    $$PROTOC \
        --proto_path $$GEN_DATA_DIR \
        --cpp_out $$OUT_PWD \
        $$GEN_DATA_DIR/LeahiMsgDefs.proto && \
    $$QMAKE_COPY $$OUT_PWD/LeahiMsgDefs.pb.h $$GEN_INCLUDE_DIR/LeahiMsgDefs.pb.h && \
    $$QMAKE_COPY $$OUT_PWD/LeahiMsgDefs.pb.cc $$GEN_SRC_DIR/LeahiMsgDefs.pb.cc && \
    $$QMAKE_DEL_FILE $$OUT_PWD/LeahiMsgDefs.pb.h $$OUT_PWD/LeahiMsgDefs.pb.cc
protoc_cpp.depends      = $$GEN_DATA_DIR/LeahiMsgDefs.proto
protoc_cpp.CONFIG      += no_link target_predeps
QMAKE_EXTRA_COMPILERS  += protoc_cpp

# 4. additional generated file dependencies
# Each generator above emits several files but can only declare one as output.
# Give the rest of the generated files their own rules, so anything depending
# on them resolves.
pb_header.target            = $$GEN_INCLUDE_DIR/LeahiMsgDefs.pb.h
pb_header.depends           = $$GEN_SRC_DIR/LeahiMsgDefs.pb.cc
QMAKE_EXTRA_TARGETS        += pb_header

msgdefs_secondary.target    = $$GEN_SRC_DIR/LeahiMsgDefs.cpp
msgdefs_secondary.depends   = $$GEN_INCLUDE_DIR/LeahiMsgDefs.h
QMAKE_EXTRA_TARGETS        += msgdefs_secondary

protoutils_h.target         = $$GEN_INCLUDE_DIR/LeahiMsgProtoUtils.h
protoutils_h.depends        = $$GEN_INCLUDE_DIR/LeahiMsgDefs.h
QMAKE_EXTRA_TARGETS        += protoutils_h

protoutils_cpp.target       = $$GEN_SRC_DIR/LeahiMsgProtoUtils.cpp
protoutils_cpp.depends      = $$GEN_INCLUDE_DIR/LeahiMsgDefs.h
QMAKE_EXTRA_TARGETS        += protoutils_cpp

# =============================================================================
# Generated headers and sources
# =============================================================================

GENERATED_INCLUDES = \
    $$GEN_INCLUDE_DIR/LeahiMsgDefs.pb.h \
    $$GEN_INCLUDE_DIR/LeahiMsgProtoUtils.h

GENERATED_SRCS = \
    $$GEN_SRC_DIR/LeahiMsgDefs.cpp \
    $$GEN_SRC_DIR/LeahiMsgProtoUtils.cpp

HEADERS += $$GENERATED_INCLUDES
SOURCES += $$GENERATED_SRCS

# Create the dependencies between the object files and generated files so generated files
# are made before trying to compile them into objects. 
protoutils_obj.target   = LeahiMsgProtoUtils.o
protoutils_obj.depends  = $$GEN_INCLUDE_DIR/LeahiMsgDefs.pb.h
QMAKE_EXTRA_TARGETS    += protoutils_obj

msgdefs_obj.target      = LeahiMsgDefs.o
msgdefs_obj.depends     = $$GEN_INCLUDE_DIR/LeahiMsgDefs.h
QMAKE_EXTRA_TARGETS    += msgdefs_obj

pb_obj.target           = LeahiMsgDefs.pb.o
pb_obj.depends          = $$GEN_INCLUDE_DIR/LeahiMsgDefs.pb.h
QMAKE_EXTRA_TARGETS    += pb_obj

INCLUDEPATH += $$PWD/include

LIBS += -lprotobuf

# Comms library
INCLUDEPATH += $$PWD/../Comms/include
LIBS        += -L$$PWD/../Comms/lib -lComms

# =============================================================================
# Install / export
# =============================================================================
# `make install` stages the library and the usage .pri into $$PREFIX, so another
# project can include them using the following:
#   include($$PREFIX/lib/MsgUtils/MsgUtils.pri)
#
# Override PREFIX during build time using:
#   qmake PREFIX=<install prefix> ...
isEmpty(PREFIX): PREFIX = $$PWD/../../install

target.path         = $$PREFIX/lib
INSTALLS           += target

export_pri.path     = $$PREFIX/lib/MsgUtils
export_pri.files    = $$PWD/MsgUtils.pri
INSTALLS           += export_pri

QMAKE_CLEAN += \
    $$GEN_INCLUDE_DIR/LeahiMsgDefs.h \
    $$GEN_INCLUDE_DIR/LeahiMsgDefs.pb.h \
    $$GEN_INCLUDE_DIR/LeahiMsgProtoUtils.h \
    $$GEN_SRC_DIR/LeahiMsgDefs.cpp \
    $$GEN_SRC_DIR/LeahiMsgDefs.pb.cc \
    $$GEN_SRC_DIR/LeahiMsgProtoUtils.cpp \
    $$GEN_DATA_DIR/LeahiMsgDefs.proto