"stage" which traverses dependencies

From: Vladimir Prus (ghost_at_[hidden])
Date: 2003-10-28 07:41:50

I'm about to make "stage" traverse dependencies, as was requested some time ago. 
The proposed semantic is described below. If anybody sees any problem with it, 
I'd be gratefull to know.

TIA,
Volodya

# The stage rule can also traverse dependencies, for example to install a
# program an all required libraries. Two properties affect this.
#
# - <traverse-dependencies>on tells that dependencies should be traversed.
# For each target in 'stage' sources, all sources to that target and all
# dependency properties are traversed. Sources and dependecy properties of
# those target are traversed recursively.
#
# - <include-type>SOME_TYPE tells that targets of SOME_TYPE should be included.
# If no such property is specified, then all found targets will be staged.
# Otherwise, only targets with types mentioned in <include-type> property
# will be included.
# 
# Example usage::
#
# stage dist : hello_world : 
# <traverse-dependencies>on <include-type>EXE <include-type>SHARED_LIB ;
#