needy b2

needy.jam

#################
# Needy toolset
#################

import type ;
import feature ;
import toolset ;
import generators ;

type.register NEEDSFILE : json ;

generators.register-standard satisfy_static : NEEDSFILE : STATIC_LIB ;

# Feature types
feature.feature needylib : : free ;
feature.feature needycmd : : free path ;
feature.feature libdir   : : free path ;
feature.feature builddir : : free path ;

# Flags for the satisfy_static rule
toolset.flags $(__name__).satisfy_static NEEDY_LIB <needylib> ;
toolset.flags $(__name__).satisfy_static COMMAND   <needycmd> ;
toolset.flags $(__name__).satisfy_static LIB_DIR   <libdir>   ;
toolset.flags $(__name__).satisfy_static BUILD_DIR <builddir> ;

rule satisfy_static ( target : extra-sources * : requirements * : default-build * : usage-requirements * )
{
	# Specify some default values
	local libdir   = [ on $(target) return $(LIB_DIR) ] ;
	local needylib = [ on $(target) return $(NEEDY_LIB) ] ;
	local needycmd = [ on $(target) return $(COMMAND) ] ;

	libdir   = $(libdir:E=.) ;
	needylib = $(needylib:E=target) ;
	needycmd = $(needycmd:E=needy) ;

	local needy_build_dir = [ SHELL "cd $(libdir) && $(needycmd) builddir $(needylib)" ] ;

	local builddir = [ on $(target) return $(BUILD_DIR:E=$(needy_build_dir)) ] ;

	# Apply potentially new values to the target
	NEEDY_LIB on $(target) = $(needylib) ;
	LIB_DIR   on $(target) = $(libdir)   ;
	COMMAND   on $(target) = $(needycmd) ;
	BUILD_DIR on $(target) = $(builddir) ;
}

actions satisfy_static bind COMMAND NEEDY_LIB
{
	cd `dirname $(>)`
	$(COMMAND) satisfy $(NEEDY_LIB)
}

# Flags for the needylib rule
toolset.flags $(__name__).needylib NEEDY_LIB <needylib> ;
toolset.flags $(__name__).needylib COMMAND   <needycmd> ;
toolset.flags $(__name__).needylib LIB_DIR   <libdir>   ;
toolset.flags $(__name__).needylib BUILD_DIR <builddir> ;

rule needylib ( target : requirements * : usage-requirements * )
{
	local libdir   = [ MATCH <libdir>(.*)   : $(requirements) ] ;
	local needylib = [ MATCH <needylib>(.*) : $(requirements) ] ;
	local needycmd = [ MATCH <needycmd>(.*) : $(requirements) ] ;

	libdir   = $(libdir:E=.) ;
	needylib = $(needylib:E=target) ;
	needycmd = $(needycmd:E=needy) ;

	local builddir = [ SHELL "cd $(libdir) && $(needycmd) builddir $(needylib)" ] ;

	local static_lib_file = "$(builddir)/lib/lib$(target).a" ;

	make $(static_lib_file) : $(libdir)/needs.json : @$(__name__).satisfy_static : $(requirements) : $(usage-requirements) ;

	lib $(target)
		: # no extra sources (built by needy)
		: <file>$(static_lib_file) $(requirements)
		: # no default build (built by needy)
		: <include>$(builddir)/include $(usage-requirements)
	;
}

#############
#   Usage   #
#############

# import needy ;
#
# path-constant LIBSDIR : libs ;
# path-constant NEEDYCMD : needy/scripts/needy ;
#
# needy.needylib boost_system     : <needylib>boost   <needycmd>$(NEEDYCMD) <libdir>$(LIBSDIR) ;
# needy.needylib boost_thread     : <needylib>boost   <needycmd>$(NEEDYCMD) <libdir>$(LIBSDIR) ;
# needy.needylib boost_coroutine  : <needylib>boost   <needycmd>$(NEEDYCMD) <libdir>$(LIBSDIR) ;
# needy.needylib boost_context    : <needylib>boost   <needycmd>$(NEEDYCMD) <libdir>$(LIBSDIR) ;
# needy.needylib boost_filesystem : <needylib>boost   <needycmd>$(NEEDYCMD) <libdir>$(LIBSDIR) ;
# needy.needylib ssl              : <needylib>openssl <needycmd>$(NEEDYCMD) <libdir>$(LIBSDIR) ;
# needy.needylib crypto           : <needylib>openssl <needycmd>$(NEEDYCMD) <libdir>$(LIBSDIR) ;
#