.\" Authors: Ian Jackson, Raphael Hertzog
.TH dpkg\-source 1 "2009-03-09" "Debian Project" "dpkg utilities"
.SH NAME
dpkg\-source \- Debian source package (.dsc) manipulation tool
.
.SH SYNOPSIS
.B dpkg\-source
.RI [ options ]
.I command
.
.SH DESCRIPTION
.B 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.
.
.SH COMMANDS
.TP
.BI "\-x " filename ".dsc " \fR[\fPoutput-directory\fR]\fP
Extract a source package. One non-option argument must be supplied,
the name of the Debian source control file
.RB ( .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 \fIsource\fR-\fIversion\fR under the current working
directory.

.B 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
.BR .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
\fBdebian/source/format\fP so that the following builds of the source
package use the same format by default.

.TP
.RI "\fB\-b\fP " 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.

\fBdpkg\-source\fP will build the source package with the first format
that works from this ordered list:
the format(s) indicated with the \fI\-\-format\fP command-line option(s),
the format indicated in \fBdebian/source/format\fP,
"1.0", "3.0 (native)". See section \fBSOURCE PACKAGE FORMATS\fP for an
extensive description of the various source package formats.

.TP
.BR \-h ", " \-\-help
Show the usage message and exit.
.TP
.BR \-\-version
Show the version and exit.
.
.SH GENERIC BUILD OPTIONS
.TP
.BI \-c controlfile
Specifies the main source control file to read information from. The
default is
.BR debian/control .
If given with relative pathname this is interpreted starting at
the source tree's top level directory.
.TP
.BI \-l changelogfile
Specifies the change log file to read information from. The
default is
.BR debian/changelog .
If given with relative pathname this is interpreted starting at
the source tree's top level directory.
.TP
.BI \-F changelogformat
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.
.TP
.BI \-\-format= value
Try first the given format for building the source package. If used
multiple times, they are tried in order. It does
override any format given in \fBdebian/source/format\fP.
.TP
.BI \-V name = value
Set an output substitution variable.
See \fBdeb\-substvars\fP(5) for a discussion of output substitution.
.TP
.BI \-T substvarsfile
Read substitution variables in
.IR substvarsfile ;
the default is to not read any file.
.TP
.BI \-D field = value
Override or add an output control file field.
.TP
.BI \-U field
Remove an output control file field.
.TP
.BR \-Z \fIcompression\fP
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:
.IR gzip ", " bzip2 ", and " lzma .
\fIgzip\fP is the default.
.TP
.BR \-z \fIlevel\fP
Compression level to use. As with \fB\-Z\fP it only affects newly created
files. Supported values are:
.IR 1 " to " 9 ", " best ", and " fast .
\fI9\fP is the default.
.TP
.BR \-i [\fIregexp\fP]
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 can be used to ignore
uncommited changes on specific files. Using \-i.* will ignore all of them.)
\fB\-i\fP by itself enables the option, with a default regexp 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
\fB\-i\fP 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.
.TP
.BR \-I [\fIfile-pattern\fP]
If this option is specified, the pattern will be passed to
.BR 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.

\fB\-I\fP 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.
.PP
.B Note:
While they have similar purposes, \fB-i\fP and \fB-I\fP have very
different syntax and semantics. \fB-i\fP can only be specified once and
takes a perl compatible regular expression which is matched against
the full relative path of each file. \fB-I\fP 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 \fB\-\-help\fP command.
.SH GENERIC EXTRACT OPTIONS
.TP
.BI \-\-no\-copy
Do not copy original tarballs near the extracted source package.
.TP
.BI \-\-no\-check
Do not check signatures and checksums before unpacking.
.TP
.BI \-\-require\-valid\-signature
Refuse to unpack the source package if it doesn't contain an OpenPGP
signature that can be verified either with the user's
\fItrustedkeys.gpg\fP keyring, one of the vendor-specific keyrings, or one
of the official Debian keyrings
(\fI/usr/share/keyrings/debian-keyring.gpg\fP
and \fI/usr/share/keyrings/debian-maintainers.gpg\fP).

.SH SOURCE PACKAGE FORMATS
.SS Format: 1.0
A source package in this format consists either of a \fB.orig.tar.gz\fP
associated to a \fB.diff.gz\fP or a single \fB.tar.gz\fP (in that case
the package is said to be \fInative\fP).

.B 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 \fB.orig.tar.gz\fP and then applying
the patch contained in the \fB.diff.gz\fP 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).

.B 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 \fB.diff.gz\fP by comparing the source package
\fIdirectory\fP with the .orig directory.

.TP
.B Build options (with \-b):
.PP
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
.B dpkg\-source
will look for the original source tarfile
.IB package _ upstream-version .orig.tar.gz
or the original source directory
.IB directory .orig
depending on the \fB\-sX\fP arguments.

.BR \-sa ", " \-sp ", " \-sk ", " \-su " and " \-sr
will not overwrite existing tarfiles or directories. If this is
desired then
.BR \-sA ", " \-sP ", " \-sK ", " \-sU " and " \-sR
should be used instead.
.TP
.BR \-sk
Specifies to expect the original source as a tarfile, by default
.IB package _ upstream-version .orig.tar. extension \fR.
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 
.IB directory .orig
for the generation of the diff.
.TP
.B \-sp
Like
.B \-sk
but will remove the directory again afterwards.
.TP
.B \-su
Specifies that the original source is expected as a directory, by
default
.IB package - upstream-version .orig
and
.B dpkg\-source
will create a new original source archive from it.
.TP
.B \-sr
Like
.B \-su
but will remove that directory after it has been used.
.TP
.B \-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
.BR .dsc .
This option must be used with care - if the directory and tarfile do
not match a bad source archive will be generated.
.TP
.B \-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.
.TP
.BR \-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
.BR \-sn ).
If a tarfile is found it will unpack it to create the diff and remove
it afterwards (this is equivalent to
.BR \-sp );
if a directory is found it will pack it to create the original source
and remove it afterwards (this is equivalent to
.BR \-sr );
if neither is found it will assume that the package has no
debianisation diffs, only a straightforward source archive (this is
equivalent to
.BR \-sn ).
If both are found then \fBdpkg\-source\fP will ignore the directory,
overwriting it, if
.B \-sA
was specified (this is equivalent to
.BR \-sP )
or raise an error if
.B \-sa
was specified.
.B \-sA
is the default.
.TP
.B Extract options (with \-x):
.PP
In all cases any existing original source tree will be removed.
.TP
.B \-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.
(\fBThis is the default\fP).
.TP
.B \-su
Unpacks the original source tree.
.TP
.B \-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.
.PP
All the
.BI \-s X
options are mutually exclusive. If you specify more than one only the
last one will be used.
.TP
.B \-\-skip\-debianization
Skips application of the debian diff on top of the upstream sources.
.
.SS 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
\fBdebian/patches/\fP matching the perl regular expression \fB[\\w\-]+\fP
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 \fBzz_debian-diff-auto\fP.
.
.SS 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
\fB-I\fP option in the \fB\-\-help\fP output).
.
.SS Format: 3.0 (quilt)
A source package in this format contains at least
an original tarball (\fB.orig.tar.\fP\fIext\fP where \fIext\fP can be
\fBgz\fP, \fBbz2\fP and \fBlzma\fP) and a debian tarball
(\fB.debian.tar.\fP\fIext\fP). It can also contain additional original
tarballs (\fB.orig-\fP\fIcomponent\fP\fB.tar.\fP\fIext\fP).
\fIcomponent\fP can only contain alphanumeric characters and dashes ("-").
.PP
.B Extracting
.PP
The main original tarball is extracted first, then all additional original
tarballs are extracted in subdirectories named after the \fIcomponent\fP
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 \fBdebian\fP directory. Note that the
debian tarball must contain a \fBdebian\fP sub-directory but it
can also contain binary files outside of that directory (see
\fB\-\-include\-binaries\fP option).
.PP
All patches listed in \fBdebian/patches/debian.series\fP or
\fBdebian/patches/series\fP 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 \fBdpkg\-source\fP 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 \fB-p1\fP
option of \fBpatch\fP. It will thus emit a warning when it encounters
such options, and the build is likely to fail.
.PP
Similarly to quilt's default behaviour, the patches can remove files too.
.PP
The file \fBdebian/patches/.dpkg-source-applied\fP is created if some
patches have been applied during the extraction.
.PP
.B Building
.PP
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 \fBdebian-changes-\fP\fIversion\fP are applied.
The temporary directory is compared to the source package directory
and the diff (if non-empty) is stored in
\fBdebian/patches/debian-changes-\fP\fIversion\fP. 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
\fBdebian/source/include-binaries\fP). The build will also fail if it
finds binary files in the debian sub-directory unless they have been
whitelisted through \fBdebian/source/include-binaries\fP.

The updated debian directory and the list of modified binaries is then
used to generate 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
\fB-i\fP option in the \fB\-\-help\fP output). In particular, the
\fB.pc\fP directory used by quilt is ignored during generation of the
automatic patch.

Note: \fBdpkg\-source\fP expects the source tree to have all patches
listed in the series file 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, \fBdpkg\-source\fP will apply the patches by itself if it
believes that they have not yet been applied. To detect this situation, it
uses the following heuristic: if a \fB.pc\fP subdirectory is detected, it
will call \fBquilt unapplied\fP to find out if some patches are not
applied. After that, it will take the first patch of the series (or the
first unapplied patch returned by \fBquilt unapplied\fP, if any) and
verify if it can be applied without errors. If the verification succeeds,
it concludes that patches have not been applied and will apply them all.
The option \fB\-\-no\-preparation\fP can be used to disable this
behaviour.
.PP
.B Build options
.TP
.B \-\-include\-removal
Do not ignore removed files and include them in the automatically
generated patch.
.TP
.B \-\-include\-timestamp
Include timestamp in the automatically generated patch.
.TP
.B \-\-include\-binaries
Add all modified binaries in the debian tarball. Also add them to
\fBdebian/source/include-binaries\fP: they will be added by default
in subsequent builds and this option is thus no more needed.
.TP
.B \-\-no\-preparation
Do not try to prepare the build tree by applying patches which are
apparently unapplied.
.PP
.B Extract options
.TP
.B \-\-skip\-debianization
Skips extraction of the debian tarball on top of the upstream sources.
.TP
.B \-\-skip\-patches
Do not apply patches at the end of the extraction.
.TP
.B \-\-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.
.
.SS 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.
.PP
.B Build options
.PP
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.
.TP
.BI \-\-target\-format= value
\fBRequired\fP. Defines the real format of the generated source package.
The generated .dsc file will contain this value in its \fIFormat\fP field
and not "3.0 (custom)".
.
.SS Format: 3.0 (git) and 3.0 (bzr)
Those formats are experimental. They generate a single tarball
containing the corresponding VCS repository.
.PP
.B Extracting
.PP
The tarball is unpacked and then the VCS is used to checkout the current
branch.
.PP
.B Building
.PP
Before going any further, some checks are done to ensure that we
don't have any non-ignored uncommitted changes.
.PP
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.
.SH FILE FORMATS
.SS debian/source/format
This file contains on a single line the format that should be used to
build the source package (possible formats are described above). No leading
or trailing spaces are allowed.
.SS debian/source/include-binaries
This file contains a list of binary files (one per line) that should be
included in the debian tarball. Leading and trailing spaces are stripped.
Lines starting with "#" are comments and are skipped. Empty lines are ignored.
.SS debian/patches/series
This file lists all patches that have to be applied (in the given order)
on top of the upstream source package. Leading and trailing spaces are
stripped. Lines starting with "#" are comments and are skipped. Empty
lines are ignored. Remaining lines start with a patch filename (relative
to the \fBdebian/patches/\fP directory) up to the first space character or
the end of line. Optional quilt options can follow up to the end of line
or the first "#" preceded by one or more spaces (which marks the start of
a comment up to the end of line).
.SH BUGS
The point at which field overriding occurs compared to certain
standard output field settings is rather confused.
.SH SEE ALSO
.BR dpkg\-deb (1),
.BR dpkg (1),
.BR dselect (1).
.
.SH AUTHORS
Copyright \(co 1995-1996 Ian Jackson
.br
Copyright \(co 2000 Wichert Akkerman
.br
Copyright \(co 2008-2009 Rapha\[:e]l Hertzog
.sp
This is free software; see the GNU General Public Licence version 2 or later
for copying conditions. There is NO WARRANTY.