dpkg-source(1)

NAME
dpkg-source - Debian source package (.dsc) manipulation tool

SYNOPSIS
dpkg-source [options] command

DESCRIPTION
dpkg-source packs and unpacks Debian source archives. None of these commands allow multiple options to be combined into one, and they do not allow the value for an option to be specified in a separate argument.

COMMANDS

-x filename.dsc [output-directory]
    Extract a source package. One non-option argument must be supplied, the name of the Debian source control file (.dsc). An optional second non-option argument may be supplied to specify the directory to extract the source package to, this must not exist. If no output directory is specified, the source package is extracted into a directory named source-version under the current working directory. dpkg-source will read the names of the other file(s) making up the source package from the control file; they are assumed to be in the same directory as the .dsc. The files in the extracted package will have their permissions and ownerships set to those which would have been expected if the files and directories had simply been created - directories and executable files will be 0777 and plain files will be 0666, both modified by the extractors' umask; if the parent directory is setgid then the extracted directories will be too, and all the files and directories will inherit its group ownership. If the source package uses a non-standard format (currently this means all formats except "1.0"), its name will be stored in debian/source/format so that the following builds of the source package use the same format by default.

-b directory [format-specific-parameters]
    Build a source package. The first non-option argument is taken as the name of the directory containing the debianized source tree (i.e. with a debian sub-directory and maybe changes to the original files). Depending on the source package format used to build the package, additional parameters might be accepted. dpkg-source will build the source package with the first format that works from this ordered list: the format indicated in the Format field of debian/control, the format(s) indicated with the --format command-line option(s), the format indicated in debian/source/format, "1.0", "3.0 (native)". See below for an extensive description of various source package formats.

-h, --help
    Show the usage message and exit.

--version
    Show the version and exit.

GENERIC BUILD OPTIONS

-ccontrolfile
    Specifies the main source control file to read information from. The default is debian/control. If given with relative pathname this is interpreted starting at the source tree's top level directory.

-lchangelogfile
    Specifies the change log file to read information from. The default is debian/changelog. If given with relative pathname this is interpreted starting at the source tree's top level directory.

-Fchangelogformat
    Specifies the format of the changelog. By default the format is read from a special line near the bottom of the changelog or failing that defaults to the debian standard format.

--format=value
    Try first the given format for building the source package. If used multiple times, they are tried in order. It doesn't override any explicit Format field in debian/control but it does override any format given in debian/source/format.

-Vname=value
    Deprecated. Set an output substitution variable. See deb-substvars(5) for a discussion of output substitution.

-Tsubstvarsfile
    Deprecated. Read substitution variables in substvarsfile; the default is to not read any file.

-Dfield=value
    Override or add an output control file field.

-Ufield
    Remove an output control file field.

-Zcompression
    Specify the compression to use for created files (tarballs and diffs). Note that this option will not cause existing tarballs to be recompressed, it only affects new files. Supported values are: gzip, bzip2, and lzma. gzip is the default.

-zlevel
    Compression level to use. As with -Z it only affects newly created files. Supported values are: 1 to 9, best, and fast. 9 is the default.

-i[regexp]
    You may specify a perl regular expression to match files you want filtered out of the list of files for the diff. (This list is generated by a find command.) (If the source package is being built as a version 3 source package using a VCS, this is instead used to ignore uncommitted files.) -i by itself enables the option, with a default that will filter out control files and directories of the most common revision control systems, backup and swap files and Libtool build output directories. There can only be one active regexp, of multiple -i options only the last one will take effect. This is very helpful in cutting out extraneous files that get included in the diff, e.g. if you maintain your source in a revision control system and want to use a checkout to build a source package without including the additional files and directories that it will usually contain (e.g. CVS/, .cvsignore, .svn/). The default regexp is already very exhaustive, but if you need to replace it, please note that by default it can match any part of a path, so if you want to match the begin of a filename or only full filenames, you will need to provide the necessary anchors (e.g. '(^|/)', '($|/)') yourself.

-I[file-pattern]
    If this option is specified, the pattern will be passed to tar(1)'s --exclude option when it is called to generate a .orig.tar or .tar file. For example, -ICVS will make tar skip over CVS directories when generating a .tar.gz file. The option may be repeated multiple times to list multiple patterns to exclude. -I by itself adds default --exclude options that will filter out control files and directories of the most common revision control systems, backup and swap files and Libtool build output directories.

Note: While they have similar purposes, -i and -I have very different syntax and semantics. -i can only be specified once and takes a perl compatible regular expression which is matched against the full relative path of each file. -I can specified multiple times and takes a filename pattern with shell wildcards. The pattern is applied to the full relative path but also to each part of the path individually. The exact semantic of tar's --exclude option is somewhat complicated, see http://www.gnu.org/software/tar/manual/tar.html#wildcards for a full documentation. The default regexp and patterns for both options can be seen in the output of the --help command.

GENERIC EXTRACT OPTIONS

--no-copy
    Do not copy original tarballs near the extracted source package.

--no-check
    Do not check signatures and checksums before unpacking.

SOURCE PACKAGE FORMATS

  Format: 1.0
A source package in this format consists either of a .orig.tar.gz associated to a .diff.gz or a single .tar.gz (in that case the package is said to be native). Extracting Extracting a native package is a simple extraction of the single tarball in the target directory. Extracting a non-native package is done by first unpacking the .orig.tar.gz and then applying the patch contained in the .diff.gz file. The timestamp of all patched files is reset to the extraction time of the source package (this avoids timestamp skews leading to problems when autogenerated files are patched). The diff can create new files (the whole debian directory is created that way) but can't remove files (empty files will be left over). Building Building a native package is just creating a single tarball with the source directory. Building a non-native package involves extracting the original tarball in a separate ".orig" directory and regenerating the .diff.gz by comparing the source package directory with the .orig directory.

Build options (with -b):

If a second non-option argument is supplied it should be the name of the original source directory or tarfile or the empty string if the package is a Debian-specific one and so has no Debianisation diffs. If no second argument is supplied then dpkg-source will look for the original source tarfile package_upstream-version.orig.tar.gz or the original source directory directory.orig depending on the -sX arguments. -sa, -sp, -sk, -su and -sr will not overwrite existing tarfiles or directories. If this is desired then -sA, -sP, -sK, -sU and -sR should be used instead.

-sk Specifies to expect the original source as a tarfile, by default package_upstream-version.orig.tar.extension. It will leave this original source in place as a tarfile, or copy it to the current directory if it isn't already there. The tarball will be unpacked into directory.orig for the generation of the diff.

-sp Like -sk but will remove the directory again afterwards.

-su Specifies that the original source is expected as a directory, by default package-upstream-version.orig and dpkg-source will create a new original source archive from it.

-sr Like -su but will remove that directory after it has been used.

-ss Specifies that the original source is available both as a directory and as a tarfile. dpkg-source will use the directory to create the diff, but the tarfile to create the .dsc. This option must be used with care - if the directory and tarfile do not match a bad source archive will be generated.

-sn Specifies to not look for any original source, and to not generate a diff. The second argument, if supplied, must be the empty string. This is used for Debian-specific packages which do not have a separate upstream source and therefore have no debianisation diffs.

-sa or -sA
    Specifies to look for the original source archive as a tarfile or as a directory - the second argument, if any, may be either, or the empty string (this is equivalent to using -sn). If a tarfile is found it will unpack it to create the diff and remove it afterwards (this is equivalent to -sp); if a directory is found it will pack it to create the original source and remove it afterwards (this is equivalent to -sr); if neither is found it will assume that the package has no debianisation diffs, only a straightforward source archive (this is equivalent to -sn). If both are found then dpkg-source will ignore the directory, overwriting it, if -sA was specified (this is equivalent to -sP) or raise an error if -sa was specified. -sA is the default.

Extract options (with -x):

In all cases any existing original source tree will be removed.

-sp Used when extracting then the original source (if any) will be left as a tarfile. If it is not already located in the current directory or if an existing but different file is there it will be copied there. (This is the default).

-su Unpacks the original source tree.

-sn Ensures that the original source is neither copied to the current directory nor unpacked. Any original source tree that was in the current directory is still removed.

All the -sX options are mutually exclusive. If you specify more than one only the last one will be used.

  Format: 2.0
Also known as wig&pen. This format is not recommended for wide-spread usage, the format "3.0 (quilt)" replaces it. Wig&pen was the first specification of a new-generation source package format. The behaviour of this format is the same as the "3.0 (quilt)" format except that it doesn't use an explicit list of patches. All files in debian/patches/ matching the perl regular expression [\w-]+ must be valid patches: they are applied at extraction time. When building a new source package, any change to the upstream source is stored in a patch named zz_debian-diff-auto.

  Format: 3.0 (native)
This format is an extension of the native package format as defined in the 1.0 format. It supports all compression methods and will ignore by default any VCS specific files and directories as well as many temporary files (see default value associated to -I option in the --help output).

  Format: 3.0 (quilt)
A source package in this format contains at least an original tarball (.orig.tar.ext where ext can be gz, bz2 and lzma) and a debian tarball (.debian.tar.ext). It can also contain additional original tarballs (.orig-component.tar.ext).

Extracting

The main original tarball is extracted first, then all additional original tarballs are extracted in subdirectories named after the component part of their filename (any pre-existing directory is replaced). The debian tarball is extracted on top of the source directory after prior removal of any pre-existing debian directory. Note that the debian tarball must contain a debian sub-directory but it can also contain binary files outside of that directory (see --include-binaries option).

All patches listed in debian/patches/debian.series or debian/patches/series are then applied. If the former file is used and the latter one doesn't exist (or is a symlink), then the latter is replaced with a symlink to the former. This is meant to simplify usage of quilt to manage the set of patches. Note however that while dpkg-source parses correctly series files with explicit options used for patch application (stored on each line after the patch filename and one or more spaces), it does ignore those options and always expect patches that can be applied with the -p1 option of patch. It will thus emit a warning when it encounters such options, and the build is likely to fail.

Similarly to quilt's default behaviour, the patches can remove files too.

The file debian/patches/.dpkg-source-applied is created if some patches have been applied during the extraction.

Building

All original tarballs found in the current directory are extracted in a temporary directory by following the same logic as for the unpack, the debian directory is copied over in the temporary directory, and all patches except debian-changes-version are applied. The temporary directory is compared to the source package directory and the diff (if non-empty) is stored in debian/patches/debian-changes-version. Any change on a binary file is not representable in a diff and will thus lead to a failure unless the maintainer deliberately decided to include that modified binary file in the debian tarball (by listing it in debian/source/include-binaries). The build will also fail if it finds binary files in the debian sub-directory unless they have been whitelisted through debian/source/include-binaries. The updated debian directory and the list of modified binaries is then used to regenerate the debian tarball. The automatically generated diff doesn't include changes on VCS specific files as well as many temporary files (see default value associated to -i option in the --help output). In particular, the .pc directory used by quilt is ignored during generation of the automatic patch. Note: dpkg-source expects the source tree to have all patches applied when you generate the source package. This is not the case when the source tree has been obtained by unpacking a source package using the Format: 1.0 for instance. To mitigate the problem, dpkg-source will apply patches before building unless it finds debian/patches/.dpkg-source-applied. The presence of a .pc subdirectory is also interpreted as a sign that some patches have been applied and in this case quilt unapplied is called to verify that all patches are applied. The option --no-preparation can be used to disable this behaviour.

Build options

--include-removal
    Do not ignore removed files and include them in the automatically generated patch.

--include-timestamp
    Include timestamp in the automatically generated patch.

--include-binaries
    Add all modified binaries in the debian tarball. Also add them to debian/source/include-binaries: they will be added by default in subsequent builds and this option is thus no more needed.

--no-preparation
    Do not try to prepare the build tree by applying patches which are apparently unapplied.

Extract options

--skip-patches
    Do not apply patches at the end of the extraction.

--without-quilt
    Don't use quilt to apply patches but dpkg-source's own code. It won't be possible to use quilt directly on the unpacked directory but it will be free of quilt's temporary files as well.

  Format: 3.0 (custom)
This format is particular. It doesn't represent a real source package format but can be used to create source packages with arbitrary files.

Build options

All non-option arguments are taken as files to integrate in the generated source package. They must exist and are preferrably in the current directory. At least one file must be given.

--target-format=value
    Required. Defines the real format of the generated source package. The generated .dsc file will contain this value in its Format field and not "3.0 (custom)".

  Format: 3.0 (git) and 3.0 (bzr)
Those formats are experimental. They generate a single tarball containing the corresponding VCS repository.

Extracting

The tarball is unpacked and then the VCS is used to checkout the current branch.

Building

Before going any further, some checks are done to ensure that we don't have any non-ignored uncommitted changes.

Then the VCS specific part of the source directory is copied over to a temporary directory. Before this temporary directory is packed in a tarball, various cleanup are done to save space.

BUGS
The point at which field overriding occurs compared to certain standard output field settings is rather confused.

SEE ALSO
dpkg-deb(1), dpkg(1), dselect(1).

AUTHORS
Copyright (C) 1995-1996 Ian Jackson
Copyright (C) 2000 Wichert Akkerman
Copyright (C) 2008 Raphaël Hertzog

This is free software; see the GNU General Public Licence version 2 or later for copying conditions. There is NO WARRANTY.