[gentoo-user] Is binary emerge equivalent to source emerge?

["Ian Clowes" <clowes_ian@hotmail.com>]

Hi

I've been building a box for a specific purpose by emerge-ing and playing 
with various packages until I ended up with something that matched what I 
wanted.

I'd now like to rebuild the box including just the packages that turned out 
to be relevant.

Rather than do source installs again I was thinking of using the current box 
to build binary packages before wiping it and doing a rebuild from these 
binaries, hence saving on heaps of build time after setting make.conf, etc. 
to match the current install.  One additional step that I think is important 
is to use a Portage snapshot from the current machine.

A few questions...

1) Does this seem like a sensible idea?  Will it generally work?
2) Will --usepkg --getbinpkg use binary packages for dependencies?
3) Is the resultant Portage database equivalent to source emerges, 
especially in respect of future --updates, --newuse, etc?
4) Am I right to use a Portage snapshot from the current machine?
5) Is this idea so close to the Catalyst idea that I should use its methods 
to achieve my aims?

TIA
IanC


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