bullet3/mk/jam/subdir.jam

#============================================================================
# Work around problems the SubDir rule of Jambase
#	(until jampeople accept my patches :-/ )
# Copyright (C)2003 by Matze Braun <matzebraun@users.sourceforge.net>
#
#    This library is free software; you can redistribute it and/or modify it
#    under the terms of the GNU Library General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or (at your
#    option) any later version.
#
#    This library is distributed in the hope that it will be useful, but
#    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
#    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
#    License for more details.
#
#    You should have received a copy of the GNU Library General Public License
#    along with this library; if not, write to the Free Software Foundation,
#    Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
#============================================================================

LOCATE.OBJECTS ?= $(BUILDTOP)/out/$(OSFULL[1]:L) ;
LOCATE.TARGETS ?= $(BUILDTOP) ;
LOCATE.DOCS ?= $(BUILDTOP)/out/docs ;

SUBDIRRULES += FixSubDirPath ;

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

rule FixSubDirPath
{
    LOCATE_SOURCE = [ FDirName $(LOCATE.OBJECTS) $(SUBDIR_TOKENS) ] ;
    LOCATE_TARGET = [ FDirName $(LOCATE.OBJECTS) $(SUBDIR_TOKENS) ] ;
}

# Fix bug in Jambase where SubInclude in the middle of a Jamfile 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 = $(i:R=$(>)) ;
	    local targetdir = $(targetfile:D) ;
	    if ! $(targetdir) { targetdir = "." ; }
	    targetdir = $(targetdir:G=dir) ;
            Depends $(i) : $(targetdir) ;
            MkDir $(targetdir) ;
        }
    }
}

# 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
{
        $(CMD.MKDIRS) "$(<)"
}