Re: How does apt-get construt package uri?
On Tue, 15 Oct 2002 01:57:00 +0100
Colin Watson <cjwatson@debian.org> wrote:
> On Mon, Oct 14, 2002 at 08:46:20PM -0400, Try KDE wrote:
> > Here is a harder question (in my opinion, anyway): given a http/ftp
> > line in sources.list, what's apt's algorithm for retrieve the list
> > of packages. For example, deb http://http.us.debian.org/debian/
> > testing main non-free
> > contrib
> >
> > will produce such an output from apt-get:
> > Get:1 http://http.us.debian.org testing/main Packages [2036kB]
> >
> > So exactly what uri was constructed out of it? My browser says
> > http://http.us.debian.org/testing/main doesn't exist. By the way,
> > apt-get's manpage is very unclear in this aspects.
>
> The sources.list(5) man page is better, but still doesn't go into
> enough detail. The actual URL constructed is:
>
> http://http.us.debian.org/debian/dists/testing/main/Packages.gz
>
> The dists/ is implicit when the distribution, "testing" in your case,
> doesn't end with a slash. The Packages versus Packages.gz thing is my
> recollection, and *is* confusing when you're trying to set up a local
> archive and forget to gzip the Packages file (see bug #65839).
>
And it gets even more interesting when you are actually working with
installing packages. The URI becomes:
http://http.us.debian.org/debian/pool/[main|contrib|non-free]/[1st-letter-of-package-name]/[package-name]/[package-name_version-debianrelease_arch.deb]
Example:
http://http.us.debian.org/debian/pool/main/3/3dchess/3dchess_0.8.1-9_i386.deb
Yes, the wrapping on those two lines will suck.
G
--
gvl2 (Gerald)
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