APT-FTPARCHIVE(1) APT APT-FTPARCHIVE(1)
NAME
apt-ftparchive - Utility to generate index files
SYNOPSIS
apt-ftparchive [-dsq] [--md5] [--delink] [--readonly] [--contents]
[--arch architecture] [-o=config_string] [-c=config_file]
{packages path [override-file [pathprefix]] |
sources path [override-file [pathprefix]] |
contents path | release path |
generate config_file section... | clean config_file |
{-v | --version} | {-h | --help}}
DESCRIPTION
apt-ftparchive is the command line tool that generates the index files
that APT uses to access a distribution source. The index files should be
generated on the origin site based on the content of that site.
apt-ftparchive is a superset of the dpkg-scanpackages(1) program,
incorporating its entire functionality via the packages command. It also
contains a contents file generator, contents, and an elaborate means to
'script' the generation process for a complete archive.
Internally apt-ftparchive can make use of binary databases to cache the
contents of a .deb file and it does not rely on any external programs
aside from gzip(1). When doing a full generate it automatically performs
file-change checks and builds the desired compressed output files.
Unless the -h, or --help option is given, one of the commands below must
be present.
packages
The packages command generates a package file from a directory tree.
It takes the given directory and recursively searches it for .deb
files, emitting a package record to stdout for each. This command is
approximately equivalent to dpkg-scanpackages(1).
The option --db can be used to specify a binary caching DB.
sources
The sources command generates a source index file from a directory
tree. It takes the given directory and recursively searches it for
.dsc files, emitting a source record to stdout for each. This
command is approximately equivalent to dpkg-scansources(1).
If an override file is specified then a source override file will be
looked for with an extension of .src. The --source-override option
can be used to change the source override file that will be used.
contents
The contents command generates a contents file from a directory
tree. It takes the given directory and recursively searches it for
.deb files, and reads the file list from each file. It then sorts
and writes to stdout the list of files matched to packages.
Directories are not written to the output. If multiple packages own
the same file then each package is separated by a comma in the
output.
The option --db can be used to specify a binary caching DB.
release
The release command generates a Release file from a directory tree.
It recursively searches the given directory for uncompressed and
compressed Packages, Sources, Contents, Components and icons files
as well as Release, Index and md5sum.txt files by default
(APT::FTPArchive::Release::Default-Patterns). Additional filename
patterns can be added by listing them in
APT::FTPArchive::Release::Patterns. It then writes to stdout a
Release file containing (by default) an MD5, SHA1, SHA256 and SHA512
digest for each file.
Values for the additional metadata fields in the Release file are
taken from the corresponding variables under
APT::FTPArchive::Release, e.g. APT::FTPArchive::Release::Origin.
The supported fields are Origin, Label, Suite, Version, Codename,
Date, NotAutomatic, ButAutomaticUpgrades, Acquire-By-Hash,
Valid-Until, Signed-By, Architectures, Components and Description.
generate
The generate command is designed to be runnable from a cron script
and builds indexes according to the given config file. The config
language provides a flexible means of specifying which index files
are built from which directories, as well as providing a simple
means of maintaining the required settings.
clean
The clean command tidies the databases used by the given
configuration file by removing any records that are no longer
necessary.
THE GENERATE CONFIGURATION
The generate command uses a configuration file to describe the archives
that are going to be generated. It follows the typical ISC configuration
format as seen in ISC tools like bind 8 and dhcpd. apt.conf(5) contains
a description of the syntax. Note that the generate configuration is
parsed in sectional manner, but apt.conf(5) is parsed in a tree manner.
This only effects how the scope tag is handled.
The generate configuration has four separate sections, each described
below.
Dir Section
The Dir section defines the standard directories needed to locate the
files required during the generation process. These directories are
prepended certain relative paths defined in later sections to produce a
complete an absolute path.
ArchiveDir
Specifies the root of the FTP archive, in a standard Debian
configuration this is the directory that contains the ls-LR and dist
nodes.
OverrideDir
Specifies the location of the override files.
CacheDir
Specifies the location of the cache files.
FileListDir
Specifies the location of the file list files, if the FileList
setting is used below.
Default Section
The Default section specifies default values, and settings that control
the operation of the generator. Other sections may override these
defaults with a per-section setting.
Packages::Compress
Sets the default compression schemes to use for the package index
files. It is a string that contains a space separated list of at
least one of the compressors configured via the APT::Compressor
configuration scope. The default for all compression schemes is '.
gzip'.
Packages::Extensions
Sets the default list of file extensions that are package files.
This defaults to '.deb'.
Sources::Compress
This is similar to Packages::Compress except that it controls the
compression for the Sources files.
Sources::Extensions
Sets the default list of file extensions that are source files. This
defaults to '.dsc'.
Contents::Compress
This is similar to Packages::Compress except that it controls the
compression for the Contents files.
Translation::Compress
This is similar to Packages::Compress except that it controls the
compression for the Translation-en master file.
DeLinkLimit
Specifies the number of kilobytes to delink (and replace with hard
links) per run. This is used in conjunction with the per-section
External-Links setting.
FileMode
Specifies the mode of all created index files. It defaults to 0644.
All index files are set to this mode with no regard to the umask.
LongDescription
Specifies whether long descriptions should be included in the
Packages file or split out into a master Translation-en file.
TreeDefault Section
Sets defaults specific to Tree sections. All of these variables are
substitution variables and have the strings $(DIST), $(SECTION) and
$(ARCH) replaced with their respective values.
MaxContentsChange
Sets the number of kilobytes of contents files that are generated
each day. The contents files are round-robined so that over several
days they will all be rebuilt.
ContentsAge
Controls the number of days a contents file is allowed to be checked
without changing. If this limit is passed the mtime of the contents
file is updated. This case can occur if the package file is changed
in such a way that does not result in a new contents file [override
edit for instance]. A hold off is allowed in hopes that new .debs
will be installed, requiring a new file anyhow. The default is 10,
the units are in days.
Directory
Sets the top of the .deb directory tree. Defaults to
$(DIST)/$(SECTION)/binary-$(ARCH)/
SrcDirectory
Sets the top of the source package directory tree. Defaults to
$(DIST)/$(SECTION)/source/
Packages
Sets the output Packages file. Defaults to
$(DIST)/$(SECTION)/binary-$(ARCH)/Packages
Sources
Sets the output Sources file. Defaults to
$(DIST)/$(SECTION)/source/Sources
Translation
Sets the output Translation-en master file with the long
descriptions if they should be not included in the Packages file.
Defaults to $(DIST)/$(SECTION)/i18n/Translation-en
InternalPrefix
Sets the path prefix that causes a symlink to be considered an
internal link instead of an external link. Defaults to
$(DIST)/$(SECTION)/
Contents
Sets the output Contents file. Defaults to
$(DIST)/$(SECTION)/Contents-$(ARCH). If this setting causes multiple
Packages files to map onto a single Contents file (as is the
default) then apt-ftparchive will integrate those package files
together automatically.
Contents::Header
Sets header file to prepend to the contents output.
BinCacheDB
Sets the binary cache database to use for this section. Multiple
sections can share the same database.
FileList
Specifies that instead of walking the directory tree, apt-ftparchive
should read the list of files from the given file. Relative files
names are prefixed with the archive directory.
SourceFileList
Specifies that instead of walking the directory tree, apt-ftparchive
should read the list of files from the given file. Relative files
names are prefixed with the archive directory. This is used when
processing source indexes.
Tree Section
The Tree section defines a standard Debian file tree which consists of a
base directory, then multiple sections in that base directory and
finally multiple Architectures in each section. The exact pathing used
is defined by the Directory substitution variable.
The Tree section takes a scope tag which sets the $(DIST) variable and
defines the root of the tree (the path is prefixed by ArchiveDir).
Typically this is a setting such as dists/trixie.
All of the settings defined in the TreeDefault section can be used in a
Tree section as well as three new variables.
When processing a Tree section apt-ftparchive performs an operation
similar to:
for i in Sections do
for j in Architectures do
Generate for DIST=scope SECTION=i ARCH=j
Sections
This is a space separated list of sections which appear under the
distribution; typically this is something like main contrib non-free
non-free-firmware
Architectures
This is a space separated list of all the architectures that appear
under search section. The special architecture 'source' is used to
indicate that this tree has a source archive. The architecture 'all'
signals that architecture specific files like Packages should not
include information about architecture all packages in all files as
they will be available in a dedicated file.
LongDescription
Specifies whether long descriptions should be included in the
Packages file or split out into a master Translation-en file.
BinOverride
Sets the binary override file. The override file contains section,
priority and maintainer address information.
SrcOverride
Sets the source override file. The override file contains section
information.
ExtraOverride
Sets the binary extra override file.
SrcExtraOverride
Sets the source extra override file.
BinDirectory Section
The bindirectory section defines a binary directory tree with no special
structure. The scope tag specifies the location of the binary directory
and the settings are similar to the Tree section with no substitution
variables or SectionArchitecture settings.
Packages
Sets the Packages file output.
Sources
Sets the Sources file output. At least one of Packages or Sources is
required.
Contents
Sets the Contents file output (optional).
BinOverride
Sets the binary override file.
SrcOverride
Sets the source override file.
ExtraOverride
Sets the binary extra override file.
SrcExtraOverride
Sets the source extra override file.
BinCacheDB
Sets the cache DB.
PathPrefix
Appends a path to all the output paths.
FileList, SourceFileList
Specifies the file list file.
THE BINARY OVERRIDE FILE
The binary override file is fully compatible with dpkg-scanpackages(1).
It contains four fields separated by spaces. The first field is the
package name, the second is the priority to force that package to, the
third is the section to force that package to and the final field is the
maintainer permutation field.
The general form of the maintainer field is:
old [// oldn]* => new
or simply,
new
The first form allows a double-slash separated list of old email
addresses to be specified. If any of those are found then new is
substituted for the maintainer field. The second form unconditionally
substitutes the maintainer field.
THE SOURCE OVERRIDE FILE
The source override file is fully compatible with dpkg-scansources(1).
It contains two fields separated by spaces. The first field is the
source package name, the second is the section to assign it.
THE EXTRA OVERRIDE FILE
The extra override file allows any arbitrary tag to be added or replaced
in the output. It has three columns, the first is the package, the
second is the tag and the remainder of the line is the new value.
OPTIONS
All command line options may be set using the configuration file, the
descriptions indicate the configuration option to set. For boolean
options you can override the config file by using something like
-f-,--no-f, -f=no or several other variations.
--md5, --sha1, --sha256, --sha512
Generate the given checksum. These options default to on, when
turned off the generated index files will not have the checksum
fields where possible. Configuration Items:
APT::FTPArchive::Checksum and APT::FTPArchive::Index::Checksum where
Index can be Packages, Sources or Release and Checksum can be MD5,
SHA1, SHA256 or SHA512.
-d, --db
Use a binary caching DB. This has no effect on the generate command.
Configuration Item: APT::FTPArchive::DB.
-q, --quiet
Quiet; produces output suitable for logging, omitting progress
indicators. More q's will produce more quiet up to a maximum of 2.
You can also use -q=# to set the quiet level, overriding the
configuration file. Configuration Item: quiet.
--delink
Perform Delinking. If the External-Links setting is used then this
option actually enables delinking of the files. It defaults to on
and can be turned off with --no-delink. Configuration Item:
APT::FTPArchive::DeLinkAct.
--contents
Perform contents generation. When this option is set and package
indexes are being generated with a cache DB then the file listing
will also be extracted and stored in the DB for later use. When
using the generate command this option also allows the creation of
any Contents files. The default is on. Configuration Item:
APT::FTPArchive::Contents.
-s, --source-override
Select the source override file to use with the sources command.
Configuration Item: APT::FTPArchive::SourceOverride.
--readonly
Make the caching databases read only. Configuration Item:
APT::FTPArchive::ReadOnlyDB.
-a, --arch
Accept in the packages and contents commands only package files
matching *_arch.deb or *_all.deb instead of all package files in the
given path. Configuration Item: APT::FTPArchive::Architecture.
APT::FTPArchive::AlwaysStat
apt-ftparchive(1) caches as much as possible of metadata in a
cachedb. If packages are recompiled and/or republished with the same
version again, this will lead to problems as the now outdated cached
metadata like size and checksums will be used. With this option
enabled this will no longer happen as it will be checked if the file
was changed. Note that this option is set to "false" by default as
it is not recommend to upload multiple versions/builds of a package
with the same version number, so in theory nobody will have these
problems and therefore all these extra checks are useless.
APT::FTPArchive::LongDescription
This configuration option defaults to "true" and should only be set
to "false" if the Archive generated with apt-ftparchive(1) also
provides Translation files. Note that the Translation-en master file
can only be created in the generate command.
-h, --help
Show a short usage summary.
-v, --version
Show the program version.
--audit
Show audit (and notice) messages. This overrides the quiet option,
but only for notice messages, not progress ones.
-c, --config-file
Configuration File; Specify a configuration file to use. The program
will read the default configuration file and then this configuration
file. If configuration settings need to be set before the default
configuration files are parsed specify a file with the APT_CONFIG
environment variable. See apt.conf(5) for syntax information.
-o, --option
Set a Configuration Option; This will set an arbitrary configuration
option. The syntax is -o Foo::Bar=bar. -o and --option can be used
multiple times to set different options.
--no-color, --color
Turn colors on or off. Colors are on by default on supported
terminals for apt(8) and can also be disabled using the NO_COLOR or
APT_NO_COLOR environment variables, or further configured by the
APT::Color configuration option and scope, see apt.conf(5) for
information on that.
EXAMPLES
To create a compressed Packages file for a directory containing binary
packages (.deb):
apt-ftparchive packages directory | gzip > Packages.gz
SEE ALSO
apt.conf(5)
DIAGNOSTICS
apt-ftparchive returns zero on normal operation, decimal 100 on error.
BUGS
APT bug page[1]. If you wish to report a bug in APT, please see
/usr/share/doc/debian/bug-reporting.txt or the reportbug(1) command.
AUTHORS
Jason Gunthorpe
APT team
NOTES
1. APT bug page
https://bugs.debian.org/src:apt
APT 3.0.3 29 January 2023 APT-FTPARCHIVE(1)
Generated by dwww version 1.16 on Tue Dec 16 04:52:56 CET 2025.