rule SetupObjectsDir
{
	local relPath = [ FDirName $(SUBDIR_TOKENS[2-]) ] ;
	if $(relPath) = . {
		relPath = ;
	}
	COMMON_PLATFORM_LOCATE_TARGET =
		[ FDirName $(HAIKU_COMMON_PLATFORM_OBJECT_DIR) $(relPath) ] ;

	local var ;
	for var in COMMON_ARCH COMMON_DEBUG DEBUG_$(HAIKU_DEBUG_LEVELS) {
		HOST_$(var)_LOCATE_TARGET
			= [ FDirName $(HOST_$(var)_OBJECT_DIR) $(relPath) ] ;
		TARGET_$(var)_LOCATE_TARGET
			= [ FDirName $(TARGET_$(var)_OBJECT_DIR) $(relPath) ] ;
	}

	LOCATE_TARGET = $(COMMON_PLATFORM_LOCATE_TARGET) ;
	LOCATE_SOURCE = $(LOCATE_TARGET) ;
	SEARCH_SOURCE = $(SUBDIR) $(LOCATE_SOURCE)
		$(HOST_COMMON_DEBUG_LOCATE_TARGET)		# Also add the standard output
		$(TARGET_COMMON_DEBUG_LOCATE_TARGET)	# dirs for generated sources.
	;
}

rule SubIncludeGPL
{
	# SubInclude rule that can be used to conditionally include GPL licensed
	# add-ons
	if $(INCLUDE_GPL_ADDONS) = 1 {
		SubInclude $(1) ;
	}
}


# pragma mark - MakeLocate variants


rule MakeLocateCommonPlatform
{
	MakeLocate $(1) : $(COMMON_PLATFORM_LOCATE_TARGET) ;
}

rule MakeLocatePlatform
{
	local files = $(1) ;
	local file ;
	for file in $(files) {
		if [ on $(file) return $(PLATFORM) ] = host {
			MakeLocate $(file) : $(HOST_COMMON_ARCH_LOCATE_TARGET) ;
		} else {
			MakeLocate $(file) : $(TARGET_COMMON_ARCH_LOCATE_TARGET) ;
		}
	}
}

rule MakeLocateArch
{
	local files = $(1) ;
	local file ;
	for file in $(files) {
		if [ on $(file) return $(PLATFORM) ] = host {
			MakeLocate $(file) : $(HOST_COMMON_DEBUG_LOCATE_TARGET) ;
		} else {
			MakeLocate $(file) : $(TARGET_COMMON_DEBUG_LOCATE_TARGET) ;
		}
	}
}

rule MakeLocateDebug
{
	local files = $(1) ;
	local file ;
	for file in $(files) {
		on $(file) {
			if $(PLATFORM) = host {
				MakeLocate $(file) : $(HOST_DEBUG_$(DEBUG)_LOCATE_TARGET) ;
			} else {
				MakeLocate $(file) : $(TARGET_DEBUG_$(DEBUG)_LOCATE_TARGET) ;
			}
		}
	}
}


# pragma mark - Deferred SubIncludes


# The variable used to collect the deferred SubIncludes.
HAIKU_DEFERRED_SUB_INCLUDES = ;

rule DeferredSubInclude params : jamfile : scope
{
	# DeferredSubInclude <subdir tokens> [ : <jamfile name>  [ : <scope> ] ] ;
	#
	# Takes the same directory tokens parameter as SubInclude plus an optional
	# alternative Jamfile name. The the subdirectory referred to by
	# <subdir tokens> will be included when ExecuteDeferredSubIncludes is
	# invoked, i.e. at the end of the root Jamfile. The <jamfile name> parameter
	# specifies the name of the Jamfile to include. By default it is "Jamfile".
	# The <scope> parameter can be "global" (default) or "local", specifying
	# whether the alternative Jamfile name shall also be used for subdirectories.

	HAIKU_DEFERRED_SUB_INCLUDES += "/" $(params) ;
	if $(jamfile) {
		SetConfigVar JAMFILE : $(params) : $(jamfile) : $(scope) ;
	}
}

rule ExecuteDeferredSubIncludes
{
	# ExecuteDeferredSubIncludes ;
	#
	# Performs the deferred SubIncludes scheduled by DeferredSubInclude.

	local tokensList = $(HAIKU_DEFERRED_SUB_INCLUDES) ;
	while $(tokensList) {
		# chop off leading "/"
		tokensList = $(tokensList[2-]) ;

		# get the tokens for the next include
		local tokens ;
		while $(tokensList) && $(tokensList[1]) != "/" {
			tokens += $(tokensList[1]) ;
			tokensList = $(tokensList[2-]) ;
		}

		# perform the include
		if $(tokens) {
			SubInclude $(tokens) ;
		}
	}
}

rule HaikuSubInclude tokens
{
	# HaikuSubInclude <tokens> ;
	#
	# Current subdir relative SubInclude.
	# <tokens> - subdir tokens specifying the subdirectory to be include
	#            (relative to the current subdir)

	if $(tokens) {
		SubInclude HAIKU_TOP $(SUBDIR_TOKENS) $(tokens) ;
	}
}


# pragma mark - Unique IDs/targets


# private to NextID; incremented with each NextID invocation
HAIKU_NEXT_ID = 0 ;

rule NextID
{
	# NextID ;

	local result = $(HAIKU_NEXT_ID:J=) ;
	HAIKU_NEXT_ID = [ AddNumAbs $(HAIKU_NEXT_ID) : 1 ] ;
	return $(result) ;
}

rule NewUniqueTarget basename
{
	# NewUniqueTarget [ basename ] ;

	local id = [ NextID ] ;
	return $(basename[1]:E=_target:G=unique!target)_$(id) ;
}


# pragma mark - RunCommandLine


rule RunCommandLine commandLine
{
	# RunCommandLine <commandLine>
	#
	# Creates a pseudo target that, when made by jam, causes the supplied shell
	# command line to be executed. Elements of <commandLine> with the prefix ":"
	# are replaced by the rule. After stripping the prefix such a string specifies
	# a build system target and the finally executed command line will contain
	# a path to the target instead.
	# The pseudo target will depend on all targets thus identified. Each
	# invocation of this rule creates a different pseudo target, which is
	# returned to the caller.

	# collect the targets in the command line and replace them by $targetX*
	# variables
	local substitutedCommandLine ;
	local targets ;

	local targetVarName = target ;
	local i ;
	for i in $(commandLine)  {
		# targets are marked by the ":" prefix
		local target = [ Match ^:(.*) : $(i) ] ;
		if $(target) {
			targets += $(target) ;
			targetVarName = $(targetVarName)X ;
			i = "$"$(targetVarName) ;
		}

		substitutedCommandLine += $(i) ;
	}

	# define the "run" target
	local run = [ NewUniqueTarget run ] ;
	COMMAND_LINE on $(run) = $(substitutedCommandLine) ;
	NotFile $(run) ;
	Always $(run) ;
	Depends $(run) : $(targets) ;
	RunCommandLine1 $(run) : $(targets) ;

	return $(run) ;
}

actions RunCommandLine1 {
	target=target;
	for t in $(2) ; do
		target=${target}X
		eval "${target}=${t}"
	done
	$(HOST_ADD_BUILD_COMPATIBILITY_LIB_DIR)
	"$(COMMAND_LINE)"
}


#pragma mark - DefineBuildProfile


rule DefineBuildProfile name : type : path {
	# DefineBuildProfile <name> : <type> [ : <path> ]
	#
	# Makes a build profile known. Build profiles can be used to define
	# different sets of settings for Haiku images/installations. For each
	# profile the default actions "build", "update", and "mount" (the latter
	# only for disks or image types) will be available (i.e. can be specified
	# as second parameter on the jam command line). They will build an image
	# or installation, update only given targets, respectively just mount the
	# image or disk using the bfs_shell.
	#
	# <name> - The name of the build profile.
	# <type> - The type of the build profile. Must be one of "image" (plain
	#          disk image), "vmware-image" (VMware disk image), "disk"
	#          (actual partition or hard disk device), "install" (installation
	#          in a directory), or "custom" (user-defined).
	# <path> - The path associated with the profile. Depending on the profile
	#          type, this is the path to the disk image/VMware image, hard
	#          disk/partition device, or the installation directory. If the
	#          parameter is omitted, the value of the HAIKU[_VMWARE]_IMAGE_NAME,
	#          HAIKU_IMAGE_DIR, respectively HAIKU_INSTALL_DIR or their default
	#          values will be used instead.

	if [ on $(name) return $(HAIKU_BUILD_PROFILE_SPECIFIED) ] {
		Exit "ERROR: Build profile \"$(name)\" defined twice!" ;
	}
	HAIKU_BUILD_PROFILE_SPECIFIED on $(name) = 1 ;

	if ! $(HAIKU_BUILD_PROFILE) || $(HAIKU_BUILD_PROFILE) != $(name) {
		return ;
	}

	HAIKU_BUILD_PROFILE_DEFINED = 1 ;

	# split path into directory path and name
	local targetDir = $(path:D) ;
	local targetName = $(path:BS) ;

	# Jam's path splitting produces an empty string, if a component doesn't
	# exist. That's a little unhandy for checks.
	if $(targetDir) = "" {
		targetDir = ;
	}
	if $(targetName) = "" {
		targetName = ;
	}

	targetDir ?= $(HAIKU_IMAGE_DIR) ;
	targetDir ?= $(HAIKU_DEFAULT_IMAGE_DIR) ;

	# "disk" is "image" with HAIKU_DONT_CLEAR_IMAGE
	if $(type) = "disk" {
		type = "image" ;
		HAIKU_DONT_CLEAR_IMAGE = 1 ;
	}

	local buildTarget ;
	local startOffset ;

	switch $(type) {
		case "image" : {
			targetName ?= $(HAIKU_IMAGE_NAME) ;
			targetName ?= $(HAIKU_DEFAULT_IMAGE_NAME) ;
			HAIKU_IMAGE_DIR = $(targetDir) ;
			HAIKU_IMAGE_NAME = $(targetName) ;
			buildTarget = haiku-image ;
		}

		case "vmware-image" : {
			targetName ?= $(HAIKU_VMWARE_IMAGE_NAME) ;
			targetName ?= $(HAIKU_DEFAULT_VMWARE_IMAGE_NAME) ;
			HAIKU_IMAGE_DIR = $(targetDir) ;
			HAIKU_VMWARE_IMAGE_NAME = $(targetName) ;
			buildTarget = haiku-vmware-image ;
			startOffset = --start-offset 65536 ;
		}

		case "install" : {
			path ?= $(HAIKU_INSTALL_DIR) ;
			path ?= $(HAIKU_DEFAULT_INSTALL_DIR) ;
			HAIKU_INSTALL_DIR = $(path) ;
			buildTarget = install-haiku ;
		}

		case "custom" : {
			# user-defined -- don't do anything
			return 1 ;
		}

		case * : {
			Exit "Unsupported build profile type: " $(type) ;
		}
	}

	switch $(HAIKU_BUILD_PROFILE_ACTION) {
		case "build" : {
			JAM_TARGETS = $(buildTarget) ;
		}

		case "update" : {
			JAM_TARGETS = $(buildTarget) ;
			SetUpdateHaikuImageOnly 1 ;
			HAIKU_INCLUDE_IN_IMAGE on $(HAIKU_BUILD_PROFILE_PARAMETERS) = 1 ;
		}

		case "update-all" : {
			JAM_TARGETS = $(buildTarget) ;
			SetUpdateHaikuImageOnly 1 ;
			HAIKU_INCLUDE_IN_IMAGE = 1 ;
		}

		case "mount" : {
			if $(type) = "install" {
				Exit "Build action \"mount\" not supported for profile type"
					"\"install\"." ;
			}

			local commandLine = :<build>bfs_shell $(startOffset)
				\"$(targetName:D=$(targetDir))\" ;
			JAM_TARGETS = [ RunCommandLine $(commandLine) ] ;
		}
	}

	return 1 ;
}