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# dpkg manual page - dpkg-scanpackages(1)
#
# Copyright © 1996 Michael Shields <shields@crosslink.net>
# Copyright © 2006 Frank Lichtenheld <djpig@debian.org>
# Copyright © 2007, 2009, 2011-2014 Guillem Jover <guillem@debian.org>
# Copyright © 2009 Raphaël Hertzog <hertzog@debian.org>
#
# This is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
=encoding utf8
=head1 NAME
dpkg-scanpackages - create Packages index files
=head1 SYNOPSIS
B<dpkg-scanpackages>
[I<option>...] I<binary-path>
[I<override-file>
[I<path-prefix>]]
B<E<gt>>
I<Packages>
=head1 DESCRIPTION
B<dpkg-scanpackages>
sorts through a tree of Debian binary packages and creates a Packages
file, used by
B<apt>(8),
B<dselect>(1),
etc, to tell the user what packages are available for installation. These
Packages files are the same as those found on Debian archive sites
and CD-ROMs. You might use
B<dpkg-scanpackages>
yourself if making a directory of local packages to install on a cluster
of machines.
B<Note:>
If you want to access the generated Packages file with
B<apt>(8)
you will probably need to compress the file with
B<xz>(1)
(generating a Packages.xz file),
B<bzip2>(1)
(generating a Packages.bz2 file) or
B<gzip>(1)
(generating a Packages.gz file).
B<apt>(8)
ignores uncompressed Packages files except on local access (i.e.
B<file://>
sources).
I<binary-path>
is the name of the tree of the binary packages to process (for example,
B<contrib/binary-i386>).
It is best to make this relative to the root of the Debian archive,
because every Filename field in the new Packages file will start with
this string.
I<override-file>
is the name of a file to read which contains information about how the
package fits into the distribution (the file can be compressed
since dpkg 1.15.5); see
B<deb-override>(5).
I<path-prefix>
is an optional string to be prepended to the Filename fields.
If more than one version of a package is found only the newest one
is included in the output. If they have the same version and only
differ in architecture only the first one found is used.
=head1 OPTIONS
=over
=item B<-t>, B<--type> I<type>
Scan for *.I<type> packages, instead of *.deb.
=item B<-e>, B<--extra-override> I<file>
Scan I<file> to find supplementary overrides (the file can be
compressed since dpkg 1.15.5).
See
B<deb-extra-override>(5)
for more information on its format.
=item B<-a>, B<--arch> I<arch>
Use a pattern consisting of I<*_all.deb> and I<*_arch.deb> instead of
scanning for all debs.
=item B<-h>, B<--hash> I<hash-list>
Only generate file hashes for the comma-specified list specified
(since dpkg 1.17.14).
The default is to generate all currently supported hashes.
Supported values: B<md5>, B<sha1>, B<sha256>.
=item B<-m>, B<--multiversion>
Include all found packages in the output.
=item B<-M>, B<--medium> I<id-string>
Add an B<X-Medium> field containing the value I<id-string>
(since dpkg 1.15.5).
This field is required if you want to generate B<Packages.cd> files
for use by the B<media> access method of B<dselect>.
=item B<-?>, B<--help>
Show the usage message and exit.
=item B<--version>
Show the version and exit.
=back
=head1 ENVIRONMENT
=over
=item B<DPKG_COLORS>
Sets the color mode (since dpkg 1.18.5).
The currently accepted values are: B<auto> (default), B<always> and
B<never>.
=item B<DPKG_NLS>
If set, it will be used to decide whether to activate Native Language Support,
also known as internationalization (or i18n) support (since dpkg 1.19.0).
The accepted values are: B<0> and B<1> (default).
=back
=head1 DIAGNOSTICS
B<dpkg-scanpackages>
outputs the usual self-explanatory errors. It also warns about packages
that are in the wrong subdirectory, are duplicated, have a Filename
field in their control file, are missing from the override file, or have
maintainer substitutions which do not take effect.
=head1 SEE ALSO
B<dpkg>(1),
B<dselect>(1),
B<deb-override>(5),
B<deb-extra-override>(5),
B<dpkg-scansources>(1).
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