#
# CMake configuration support for stage/install
#
# Copyright 2017 Peter Dimov
#
# Distributed under the Boost Software License, 1.0
#

import print ;
import option ;
import os ;
import path ;
import boostcpp ;
import modules ;
import property-set ;
import "class" : new ;
import feature ;
import toolset ;
import regex ;

if "--debug-cmake" in [ modules.peek : ARGV ]
{
    .info-enabled = 1 ;
}

local rule .info ( messages * )
{
    if $(.info-enabled)
    {
        ECHO info: $(messages) ;
    }
}

#

local BOOST_STAGE_LOCATE = [ option.get stagedir : ../stage ] ;
.info BOOST_STAGE_LOCATE is $(BOOST_STAGE_LOCATE) ;

local BOOST_VERSION_TAG = [ modules.peek boostcpp : BOOST_VERSION_TAG ] ;
.info BOOST_VERSION_TAG is $(BOOST_VERSION_TAG) ;

# layout

local layout = [ modules.peek boostcpp : layout ] ;
.info layout is $(layout) ;

# prefix

local default-prefix = "" ;

if [ os.name ] = NT
{
    default-prefix = C:/Boost ;
}
else
{
    default-prefix = /usr/local ;
}

.info default-prefix is $(default-prefix) ;

local prefix = [ option.get prefix : $(default-prefix) ] ;
.info prefix is $(prefix) ;

# header-subdir

header-subdir = "" ;

if $(layout) = versioned
{
    header-subdir = /boost-$(BOOST_VERSION_TAG) ;
}

.info header-subdir is $(header-subdir) ;

# libdir

local libdir = [ option.get libdir : $(prefix)/lib ] ;
.info libdir is $(libdir) ;

# generate-config

local rule generate-config ( target type )
{
    .info generate-config $(target) :: $(type) ;

    local name = [ MATCH boost_(.*)-config.cmake : $(target) ] ;

    .info generate-config: name is $(name) ;

    local cmake-lib = boost_$(name) ;
    local cmake-target = boost::$(name) ;

    print.output $(target) ;

    print.text

        "# Generated by Boost $(BOOST_VERSION)"
        ""
        "cmake_minimum_required(VERSION 3.5)"
        ""
        "if(TARGET $(cmake-target))"
        "  return()"
        "endif()"
        ""
        "# Compute the installation prefix relative to this file."
        "get_filename_component(_IMPORT_PREFIX "${CMAKE_CURRENT_LIST_FILE}" PATH)"
        "get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)"
        "get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)"
        "get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)"
        ""
        "# Create imported target $(cmake-target)"
        "add_library($(cmake-target) $(type) IMPORTED)"
        ""
        "set_target_properties($(cmake-target) PROPERTIES"
        "  INTERFACE_INCLUDE_DIRECTORIES \"\${_IMPORT_PREFIX}/include$(header-subdir)\""
        ")"
        ""
        "get_filename_component(_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)"
        "file(GLOB CONFIG_FILES "${_DIR}/libboost_$(name)-config-variant*.cmake")"
        "foreach(f ${CONFIG_FILES})"
        "  include(${f})"
        "endforeach()"
        ""
        "set(CONFIG_FILES)"
        "set(_DIR)"
        "set(_IMPORT_PREFIX)"
        ""
        "include(CMakeFindDependencyMacro)"
        "function(boost_declare_dependency package type target)"
        "  find_dependency(${package} $(BOOST_VERSION) EXACT)"
        "  set_property(TARGET boost::$(name) APPEND PROPERTY INTERFACE_LINK_LIBRARIES ${target})"
        "endfunction()"
        "include(\${CMAKE_CURRENT_LIST_DIR}/$(cmake-lib)-dependencies.cmake)"
        ""
        : true ;
}

rule generate-header-config ( target : sources * : properties * )
{
    generate-config $(target) INTERFACE ;
}

rule generate-static-config ( target : sources * : properties * )
{
    generate-config $(target) UNKNOWN ;
}

# generate-config-version

rule generate-config-version ( target : sources * : properties * )
{
    .info generate-config-version $(target) ;

    local name = [ MATCH boost_(.*)-config-version.cmake : $(target) ] ;

    .info generate-config-version: name is $(name) ;

    print.output $(target) ;

    print.text

        "# Generated by Boost $(BOOST_VERSION)"
        ""
        "set(PACKAGE_VERSION $(BOOST_VERSION))"
        ""
        "if(PACKAGE_VERSION VERSION_LESS PACKAGE_FIND_VERSION)"
        "  set(PACKAGE_VERSION_COMPATIBLE FALSE)"
        "else()"
        "  set(PACKAGE_VERSION_COMPATIBLE TRUE)"
        "  if(PACKAGE_FIND_VERSION STREQUAL PACKAGE_VERSION)"
        "    set(PACKAGE_VERSION_EXACT TRUE)"
        "  endif()"
        "endif()"
        ""
        : true ;
}

# generate-config-variant-

rule generate-config-variant- ( target : sources * : properties * )
{
    .info generate-config-variant- $(target) ;

    local ps = [ property-set.create $(properties) ] ;

    print.output $(target) ;

    print.text

        "# Generated by Boost $(BOOST_VERSION)"
        ""
        : true ;

    local variant = [ $(ps).get <variant> ] ;
    .info generate-config-variant-: variant is $(variant) ;

    print.text "# variant=$(variant)" "" : true ;

    if $(variant) = debug
    {
        print.text

            "if(\"${BOOST_BUILD_VARIANT}\" STREQUAL \"RELEASE\")"
            "  return()"
            "endif()"
            ""
            : true ;
    }
    else
    {
        print.text

            "if(\"${BOOST_BUILD_VARIANT}\" STREQUAL \"DEBUG\")"
            "  return()"
            "endif()"
            ""
            : true ;
    }
    
    local link = [ $(ps).get <link> ] ;
    .info generate-config-variant-: link is $(link) ;

    print.text "# link=$(link)" "" : true ;

    if $(link) = static
    {
        print.text

            "if(\"${BOOST_LINK_TYPE}\" STREQUAL \"SHARED\")"
            "  return()"
            "endif()"
            ""
            : true ;
    }
    else
    {
        print.text

            "if(NOT \"${BOOST_LINK_TYPE}\" STREQUAL \"SHARED\")"
            "  return()"
            "endif()"
            ""
            : true ;
    }
    
    local runtime-link = [ $(ps).get <runtime-link> ] ;
    .info generate-config-variant-: runtime-link is $(runtime-link) ;

    print.text "# runtime-link=$(runtime-link)" "" : true ;

    if $(runtime-link) = static
    {
        print.text

            "if(NOT \"${BOOST_RUNTIME_LINK}\" STREQUAL \"STATIC\")"
            "  return()"
            "endif()"
            ""
            : true ;
    }
    else
    {
        print.text

            "if(\"${BOOST_RUNTIME_LINK}\" STREQUAL \"STATIC\")"
            "  return()"
            "endif()"
            ""
            : true ;
    }

    local runtime-debugging = [ $(ps).get <runtime-debugging> ] ;
    .info generate-config-variant-: runtime-debugging is $(runtime-debugging) ;

    print.text "# runtime-debugging=$(runtime-debugging)" "" : true ;

    local toolset = [ $(ps).get <toolset> ] ;
    .info generate-config-variant-: toolset is $(toolset) ;

    print.text "# toolset=$(toolset)" "" : true ;

    local name = [ MATCH boost_(.*)-config-variant-.*cmake : $(target) ] ;
    .info generate-config-variant-: name is $(name) ;

    local ftype = STATIC_LIB ;

    if $(link) = shared
    {
        if [ os.name ] = NT
        {
            ftype = IMPORT_LIB ;
        }
        else
        {
            ftype = SHARED_LIB ;
        }
    }

    local fname = [ boostcpp.tag boost_$(name) : $(ftype) : $(ps) ] ;
    .info generate-config-variant-: fname is $(fname) ;

    print.text "# Target file name: $(fname)" "" : true ;

    print.text

        "set_property(TARGET boost::$(name) APPEND PROPERTY IMPORTED_CONFIGURATIONS $(variant:U))"
        "set_target_properties(boost::$(name) PROPERTIES"
        "  IMPORTED_LINK_INTERFACE_LANGUAGES_$(variant:U) CXX"
        "  IMPORTED_LOCATION_$(variant:U) \"${_IMPORT_PREFIX}/lib/$(fname)\""
        "  )"
        ""
        : true ;
}

# tag

rule tag ( name : type ? : property-set )
{
    .info tag $(name) :: $(type) :: $(property-set) ;

    local link = [ $(property-set).get <link> ] ;

    .info tag: link is $(link) ;

    local r = [ boostcpp.tag $(name) : STATIC_LIB : $(property-set) ] ;

    r = $(r:S=$(name:S)) ;
    r = $(r:B=$(r:B)-$(link)) ;

    .info tag: returning $(r) ;

    return $(r) ;
}

# generate-config-variant

rule generate-config-variant ( project name : property-set : sources * )
{
    .info generate-config-variant $(project) $(name) :: $(property-set) :: $(sources) ;

    local tag = [ tag $(name) : : $(property-set) ] ;

    .info generate-config-variant: tag is $(tag) ;

    local result ;

    local a = [ new non-scanning-action : $(__name__).generate-config-variant- : $(property-set) ] ;

    result += [ new file-target $(tag) : : $(project) : $(a) ] ;

    return $(result) ;
}

# exists

local rule exists ( path )
{
    return [ glob $(path) ] ;
}

# boostdep-cmake

alias boostdep : ../tools/boostdep/build//boostdep : <variant>release <link>static <runtime-link>shared <runtime-debugging>off <define>NDEBUG <threading>multi ;

feature.feature boostdep-module : : free ;
toolset.flags boostdep-cmake MODULE : <boostdep-module> ;

actions boostdep-cmake
{
    $(2) --cmake $(MODULE) > $(1)
}

# create stage and install targets

local library-dirs = [ MATCH (.*)/include : [ glob ../libs/*/include ../libs/numeric/*/include ] ] ;

for dir in $(library-dirs)
{
    .info Processing directory $(dir) ;

    local rname = [ MATCH .*/libs/(.*) : $(dir) ] ;
    .info rname is $(rname) ;

    local name = [ regex.replace $(rname) "/" "_" ] ;
    .info name is $(name) ;

    local reqs = <variant>release <link>static <runtime-link>shared <runtime-debugging>off <define>NDEBUG <threading>multi ;

    # generate -config.cmake

    local config-targets ;

    # boost_math, a dependency of lexical_cast, has six optional libraries, none of which named boost_math
    # boost_exception has an optional MSVC-only library, which creates problems under Linux

    if [ exists $(dir)/build ] && [ exists $(dir)/src ] && $(name) != "math" && $(name) != "exception"
    {
        .info Library $(name) is not header-only ;

        make boost_$(name)-config.cmake : : @generate-static-config : $(reqs) ;
        explicit boost_$(name)-config.cmake ;
        config-targets = boost_$(name)-config.cmake ;

        generate boost_$(name)-config-variant.cmake : : <generating-rule>@generate-config-variant <threading>multi ;
        explicit boost_$(name)-config-variant.cmake ;
        config-targets += boost_$(name)-config-variant.cmake ;
    }
    else
    {
        .info Library $(name) is header-only ;

        make boost_$(name)-config.cmake : : @generate-header-config : $(reqs) ;
        explicit boost_$(name)-config.cmake ;
        config-targets = boost_$(name)-config.cmake ;
    }

    # generate -config-version.cmake

    make boost_$(name)-config-version.cmake : : @generate-config-version : $(reqs) ;
    explicit boost_$(name)-config-version.cmake ;
    config-targets += boost_$(name)-config-version.cmake ;

    # generate -dependencies.cmake

    make boost_$(name)-dependencies.cmake : boostdep : @boostdep-cmake : <boostdep-module>$(rname) $(reqs) ;
    config-targets += boost_$(name)-dependencies.cmake ;

    .info The config-targets of $(name) are $(config-targets) ;

    # stage

    local stage-location = $(BOOST_STAGE_LOCATE)/lib/cmake/boost_$(name)-$(BOOST_VERSION) ;
    .info The staging location of $(name) is $(stage-location) ;

    install $(dir)-stage : $(config-targets) : <location>$(stage-location) ;
    explicit $(dir)-stage ;

    # install

    local install-location = $(libdir)/cmake/boost_$(name)-$(BOOST_VERSION) ;
    .info The install location of $(name) is $(install-location) ;

    install $(dir)-install : $(config-targets) : <location>$(install-location) ;
    explicit $(dir)-install ;
}

# stage

alias stage : $(library-dirs)-stage ;
explicit stage ;

# install

alias install : $(library-dirs)-install ;
explicit install ;