subdir.jam

经典开源游戏glest的源代码

#============================================================================
# Work around problems the SubDir rule of Jambase 
#	(until jampeople accept my patches :-/ )
#============================================================================

LOCATE_OBJECTS ?= $(top_builddir)/build/$(target) ;
LOCATE_TARGETS ?= $(top_builddir) ;
LOCATE_DOCS ?= $(top_builddir)/build ;

SUBDIRRULES += FixSubDirPath ;

MKDIR ?= mkdir ;
MKDIRS ?= "$(MKDIR) -p" ;

rule FixSubDirPath
{
    LOCATE_SOURCE = [ ConcatDirs $(LOCATE_OBJECTS) $(SUBDIR_TOKENS) ] ;
    LOCATE_TARGET = [ ConcatDirs $(LOCATE_OBJECTS) $(SUBDIR_TOKENS) ] ;

    # We need to package the Jamfile (a bit hacky here...)
    Package Jamfile ;
}

# fix bug in Jambase where SubInclude in the middle of a jam file made it break
rule SubInclude
{
    if ! $($(<[1]))
    {
        Exit SubInclude $(<[1]) without prior SubDir $(<[1]) ;
    }

    local save_SUBDIR_TOKENS = $(SUBDIR_TOKENS) ;

    SubDir $(<) ;

    include $(JAMFILE:D=$(SUBDIR)) ;

    SubDir $(<[1]) $(save_SUBDIR_TOKENS) ;
}

# this MakeLocate rule differs from the Jambase one in that it also works with
# files being in subdirectories
rule MakeLocate
{
    # MakeLocate targets : directory ;
                                                                           
    # Sets special variable LOCATE on targets, and arranges
    # with MkDir to create target directory.
                                                                                    
    # Note we grist the directory name with 'dir',
    # so that directory path components and other
    # targets don't conflict.
    
    if $(>) && $(>) != "" && $(>) != "."
    {
        local i ;
        for i in $(<) {
            LOCATE on $(i) = $(>) ;

            local targetfile = $(i:R=$(>)) ;
            Depends $(i) : $(targetfile:DG=dir) ;
            MkDir $(targetfile:DG=dir) ;
        }
    }
}

# The default MkDir rule in Jambase has problems when paths contains a sequence
# of multiple slashes (ie. bla////fup). We solve these problems and greatly
# simply this rule by using the "mkdir -p" or mkdirs command.
rule MkDir
{
    # MkDir directory ;

    # Make a directory and all its parent directories.

    # Ignore timestamps on directories: we only care if they 
    # exist.

    NoUpdate $(<) ;

    # don't create the dir multiple times
    if ! $($(<)-mkdir)
    {
        $(<)-mkdir = true ;
        MkDir1 $(<) ;
    }
}

actions MkDir1
{
        $(MKDIRS) "$(<)"
}