DIP11

[kennytm]

"Steven Schveighoffer" <schveiguy at yahoo.com> wrote:
> On Thu, 11 Aug 2011 17:20:04 -0400, Nick Sabalausky <a at a.a> wrote:
> 
> > "Andrei Alexandrescu" <SeeWebsiteForEmail at erdani.org> wrote in
> > message
> > news:j21g1a$ea4$1 at digitalmars.com...
> >>
> >> It's difficult to get all dependencies when not all sources have
> > > been  >> yet
> >> downloaded.
> >>
> >
> > With DIP11, yes. With a traditional-style package manager, no.
> 
> With either style, you need to download a package in order to
> determine if  you need to download other packages (package a may
> depend on package b  even though your project does not depend on
> package b).  The DIP11 version  does this JIT, whereas your version
> does it before compilation.  It's not  really any different.
> 
> -Steve
> 

In Debian's apt, there will be a central index that records all
dependencies for packages in the repository. So the client only needs to
synchronize that index file regularly. The system will know package A
depends on B which depends on C and D and download all 4 packages.

That said, since you need to download the pakcgaes anyway, having a
central index doesn't reduce the bytes you need to transfer and parse if
DIP11 doesn't support updating.