install

#-------------------------------------------------------------
# This script assumes it is executed from CMAKE_SOURCE_DIR.
# In other words, from the root of the main project.
#-------------------------------------------------------------

# Include this file to define a variable JOBS
include(cmake/ParallelJobs.cmake)

# Include this file to output colored text messages
include(cmake/ColoredText.cmake)

# Set the build type to Release by default, if not provided
if(NOT DEFINED BUILD_TYPE)
    set(BUILD_TYPE Release)
endif()

# Set the build path variables BUILD_PATH and ABSOLUTE_BUILD_PATH
if(NOT DEFINED BUILD_PATH)
    # Set BUILD_PATH to build if not provided,
    set(BUILD_PATH build)

    # Create the build directory under CMAKE_SOURCE_DIR
    execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${BUILD_PATH})

    # Define ABSOLUTE_BUILD_PATH variable
    set(ABSOLUTE_BUILD_PATH ${CMAKE_SOURCE_DIR}/${BUILD_PATH})
endif()

# Set the install path variables INSTALL_PATH and ABSOLUTE_INSTALL_PATH
if(NOT DEFINED PREFIX)
    # Set INSTALL_PATH to BUILD_PATH/install, if not provided via PREFIX
    set(INSTALL_PATH install)

    # Define ABSOLUTE_INSTALL_PATH variable
    set(ABSOLUTE_INSTALL_PATH ${ABSOLUTE_BUILD_PATH}/install)
else()
    # Set INSTALL_PATH to the given PREFIX cmake argument
    set(INSTALL_PATH ${PREFIX})

    # Define ABSOLUTE_INSTALL_PATH variable
    set(ABSOLUTE_INSTALL_PATH ${INSTALL_PATH})
endif()

# Check if ninja and make are installed
find_program(NINJA ninja)
find_program(MAKE make)

# The GENERATOR and ARGS variable used for the building process
set(GENERATOR "")
set(ARGS "")

# If ninja installed, use ninja
if(NOT DEFINED GENERATOR AND NINJA)
    message(STATUS "Using ninja as the build tool.")
    set(GENERATOR "-DCMAKE_GENERATOR='Ninja'")
    set(ARGS "-j${JOBS}")
endif()

# If not, use make
if(NOT DEFINED GENERATOR AND MAKE)
    message(STATUS "Using make as the build tool.")
    set(GENERATOR "-DCMAKE_GENERATOR='Unix Makefiles'")
    set(ARGS "-j${JOBS}")
endif()

# Configure the building and installation of the project
execute_process(COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH}
    ${CMAKE_COMMAND} ${CMAKE_SOURCE_DIR} ${GENERATOR}
        -DCMAKE_BUILD_TYPE=${BUILD_TYPE}
        -DCMAKE_INSTALL_PREFIX=${INSTALL_PATH})

# Build and install the library
execute_process(COMMAND ${CMAKE_COMMAND}
    --build ${BUILD_PATH} --target install -- ${ARGS})

# Print a summary of the installation
message("${BoldCyan}")
message("====================================================================================================")
message("Summary")
message("====================================================================================================${BoldWhite}")
message("The number of parallel jobs used were: ${BoldYellow}${JOBS}${BoldWhite}")
message("The external dependencies were built and installed in:")
message("    ${BoldYellow}${THIRDPARTY_BUILD_PATH}${BoldWhite}")
message("The library was built in:")
message("    ${BoldYellow}${ABSOLUTE_BUILD_PATH}${BoldWhite}")
message("The library was installed in:")
message("    ${BoldYellow}${ABSOLUTE_INSTALL_PATH}${BoldWhite}")
message("${BoldCyan}----------------------------------------------------------------------------------------------------")
message("How do I change the default build and install paths?")
message("----------------------------------------------------------------------------------------------------${BoldWhite}")
message("Change the default build path to an ${BoldBlue}absolute path${BoldWhite} <build-dir> by executing:")
message("    ${BoldYellow}cmake -DBUILD_PATH=<build-dir> -P install${BoldWhite}")
message("Change the default install path to an ${BoldBlue}absolute path${BoldWhite} <install-dir> by executing:")
message("    ${BoldYellow}cmake -DPREFIX=<install-dir> -P install${BoldWhite}")
message("Linux and Mac users might want to install in a system directory, for example:")
message("    ${BoldYellow}cmake -DPREFIX=/usr/local -P install${BoldWhite}")
message("${BoldCyan}----------------------------------------------------------------------------------------------------")
message("*** The above summary assumes a successfull build/installation for all components ***")
message("====================================================================================================")
message("${ColourReset}")