apt-ftparchive.1 - Online Linux Manual Page

APT−FTPARCHIVE - Online Linux Manual PageSection : 1
Updated : 10 May 2019
Source : APT 2.2.4
Note : APT

NAMEapt-ftparchive − Utility to generate index files

SYNOPSISapt−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}}

DESCRIPTIONapt−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 CONFIGURATIONThe 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 SectionThe 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 SectionThe 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 SectionSets 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 SectionThe 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/bullseye. 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 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 SectionThe 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 FILEThe 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]* => newor simply, newThe 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 FILEThe 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 FILEThe 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.

OPTIONSAll 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. −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.

EXAMPLESTo create a compressed Packages file for a directory containing binary packages (.deb): apt−ftparchive packages directory | gzip > Packages.gz