Provided by: dpkg-dev_1.21.21ubuntu1_all bug

NAME

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

SYNOPSIS

       dpkg-source [option...] 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, --extract filename.dsc [output-directory]
           Extract a source package (--extract since dpkg 1.17.14).  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, --build directory [format-specific-parameters]
           Build a source package (--build since dpkg 1.17.14).  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 found in this ordered
           list: the format indicated with the --format command line option, the format indicated
           in debian/source/format, “1.0”.  The fallback to “1.0” is deprecated and will be
           removed at some point in the future, you should always document the desired source
           format in debian/source/format. See section SOURCE PACKAGE FORMATS for an extensive
           description of the various source package formats.

       --print-format directory
           Print the source format that would be used to build the source package if dpkg-source
           --build directory was called (in the same conditions and with the same parameters;
           since dpkg 1.15.5).

       --before-build directory
           Run the corresponding hook of the source package format (since dpkg 1.15.8).  This
           hook is called before any build of the package (dpkg-buildpackage calls it very early
           even before debian/rules clean). This command is idempotent and can be called multiple
           times. Not all source formats implement something in this hook, and those that do
           usually prepare the source tree for the build for example by ensuring that the Debian
           patches are applied.

       --after-build directory
           Run the corresponding hook of the source package format (since dpkg 1.15.8).  This
           hook is called after any build of the package (dpkg-buildpackage calls it last). This
           command is idempotent and can be called multiple times. Not all source formats
           implement something in this hook, and those that do usually use it to undo what
           --before-build has done.

       --commit [directory] ...
           Record changes in the source tree unpacked in directory (since dpkg 1.16.1).  This
           command can take supplementary parameters depending on the source format.  It will
           error out for formats where this operation doesn't mean anything.

       -?, --help
           Show the usage message and exit.  The format specific build and extract options can be
           shown by using the --format option.

       --version
           Show the version and exit.

OPTIONS

   Generic build options
       -ccontrol-file
           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.

       -lchangelog-file
           Specifies the changelog 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.

       -Fchangelog-format
           Specifies the format of the changelog. See dpkg-parsechangelog(1) for information
           about alternative formats.

       --format=value
           Use the given format for building the source package (since dpkg 1.14.17).  It does
           override any format given in debian/source/format.

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

       -Tsubstvars-file
           Read substitution variables in substvars-file; the default is to not read any file.
           This option can be used multiple times to read substitution variables from multiple
           files (since dpkg 1.15.6).

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

       -Ufield
           Remove an output control file field.

       -Zcompression, --compression=compression
           Specify the compression to use for created tarballs and diff files (--compression
           since dpkg 1.15.5).  Note that this option will not cause existing tarballs to be
           recompressed, it only affects new files. Supported values are: gzip, bzip2, lzma and
           xz.  The default is xz for formats 2.0 and newer, and gzip for format 1.0. xz is only
           supported since dpkg 1.15.5.

       -zlevel, --compression-level=level
           Compression level to use (--compression-level since dpkg 1.15.5).  As with -Z it only
           affects newly created files. Supported values are: 1 to 9, best, and fast.  The
           default is 9 for gzip and bzip2, 6 for xz and lzma.

       -i[regex], --diff-ignore[=regex]
           You may specify a perl regular expression to match files you want filtered out of the
           list of files for the diff (--diff-ignore since dpkg 1.15.6).  (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 uncommitted changes on specific files.
           Using -i.* will ignore all of them.)

           The -i option by itself enables this setting with a default regex (preserving any
           modification to the default regex done by a previous use of --extend-diff-ignore) 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 regex, 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,
           for example 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
           regex 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.

       --extend-diff-ignore=regex
           The perl regular expression specified will extend the default value used by
           --diff-ignore and its current value, if set (since dpkg 1.15.6).  It does this by
           concatenating “|regex” to the existing value.  This option is convenient to use in
           debian/source/options to exclude some auto-generated files from the automatic patch
           generation.

       -I[file-pattern], --tar-ignore[=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 (--tar-ignore since dpkg
           1.15.6).  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
       <https://www.gnu.org/software/tar/manual/tar.html#wildcards> for a full documentation.

       The default regex 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 (since dpkg 1.14.17).

       --no-check
           Do not check signatures and checksums before unpacking (since dpkg 1.14.17).

       --no-overwrite-dir
           Do not overwrite the extraction directory if it already exists (since dpkg 1.18.8).

       --require-valid-signature
           Refuse to unpack the source package if it doesn't contain an OpenPGP signature that
           can be verified (since dpkg 1.15.0) either with the user's trustedkeys.gpg keyring,
           one of the vendor-specific keyrings, or one of the official Debian keyrings
           (/usr/share/keyrings/debian-keyring.gpg, /usr/share/keyrings/debian-nonupload.gpg and
           /usr/share/keyrings/debian-maintainers.gpg).

       --require-strong-checksums
           Refuse to unpack the source package if it does not contain any strong checksums (since
           dpkg 1.18.7).  Currently the only known checksum considered strong is SHA-256.

       --ignore-bad-version
           Turns the bad source package version check into a non-fatal warning (since dpkg
           1.17.7).  This option should only be necessary when extracting ancient source packages
           with broken versions, just for backwards compatibility.

   Generic general options
       --threads-max=threads
           Sets the maximum number of threads allowed for compressors that support multi-threaded
           operations (since dpkg 1.21.14).

       -q  Sets quiet mode to suppress warnings.

SOURCE PACKAGE FORMATS

       If you don't know what source format to use, you should probably pick either “3.0 (quilt)”
       or “3.0 (native)”.  See <https://wiki.debian.org/Projects/DebSrc3.0> for information on
       the deployment of those formats within Debian.

   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).  Optionally the
       original tarball might be accompanied by a detached upstream signature .orig.tar.gz.asc,
       extraction supported since dpkg 1.18.5.

       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 cannot remove files (empty files will be
       left over) and cannot create or change symlinks.

       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 --build):

       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 debianization 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
           debianization 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 debianization 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.

       --abort-on-upstream-changes
           The process fails if the generated diff contains changes to files outside of the
           debian sub-directory (since dpkg 1.15.8).  This option is not allowed in
           debian/source/options but can be used in debian/source/local-options.

       Extract options (with --extract):

       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.

       --skip-debianization
           Skips application of the debian diff on top of the upstream sources (since dpkg
           1.15.1).

   Format: 2.0
       Extraction supported since dpkg 1.13.9, building supported since dpkg 1.14.8.  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)
       Supported since dpkg 1.14.17.  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)
       Supported since dpkg 1.14.17.  A source package in this format contains at least an
       original tarball (.orig.tar.ext where ext can be gz, bz2, lzma and xz) and a debian
       tarball (.debian.tar.ext). It can also contain additional original tarballs
       (.orig-component.tar.ext).  component can only contain alphanumeric (‘a-zA-Z0-9’)
       characters and hyphens (‘-’).  Optionally each original tarball can be accompanied by a
       detached upstream signature (.orig.tar.ext.asc and .orig-component.tar.ext.asc),
       extraction supported since dpkg 1.17.20, building supported since dpkg 1.18.5.

       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/vendor.series or debian/patches/series are then
       applied, where vendor will be the lowercase name of the current vendor, or debian if there
       is no vendor defined.  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.  Vendor-specific series files are
       intended to make it possible to serialize multiple development branches based on the
       vendor, in a declarative way, in preference to open-coding this handling in debian/rules.
       This is particularly useful when the source would need to be patched conditionally because
       the affected files do not have built-in conditional occlusion support.  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 expects 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.

       Note that lintian(1) will emit unconditional warnings when using vendor series due to a
       controversial Debian specific ruling, which should not affect any external usage; to
       silence these, the dpkg lintian profile can be used by passing «--profile dpkg» to
       lintian(1).

       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).

       Contrary to quilt's default behaviour, patches are expected to apply without any fuzz.
       When that is not the case, you should refresh such patches with quilt, or dpkg-source will
       error out while trying to apply them.

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

       The file .pc/applied-patches 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 the automatic patch
       (debian-changes-version or debian-changes, depending on --single-debian-patch) are
       applied. The temporary directory is compared to the source package directory. When the
       diff is non-empty, the build fails unless --single-debian-patch or --auto-commit has been
       used, in which case the diff is stored in the automatic patch.  If the automatic patch is
       created/deleted, it's added/removed from the series file and from the quilt metadata.

       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 allowed through
       debian/source/include-binaries.

       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 -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 --before-build (and --build) will ensure that all patches listed in the
       series file are applied so that a package build always has all patches applied. It does
       this by finding unapplied patches (they are listed in the series file but not in
       .pc/applied-patches), and if the first patch in that set can be applied without errors, it
       will apply them all. The option --no-preparation can be used to disable this behavior.

       Recording changes

       --commit [directory] [patch-name] [patch-file]
           Generates a patch corresponding to the local changes that are not managed by the quilt
           patch system and integrates it in the patch system under the name patch-name. If the
           name is missing, it will be asked interactively. If patch-file is given, it is used as
           the patch corresponding to the local changes to integrate. Once integrated, an editor
           is launched so that you can edit the meta-information in the patch header.

           Passing patch-file is mainly useful after a build failure that pre-generated this
           file, and on this ground the given file is removed after integration. Note also that
           the changes contained in the patch file must already be applied on the tree and that
           the files modified by the patch must not have supplementary unrecorded changes.

           If the patch generation detects modified binary files, they will be automatically
           added to debian/source/include-binaries so that they end up in the debian tarball
           (exactly like dpkg-source --include-binaries --build would do).

       Build options

       --allow-version-of-quilt-db=version
           Allow dpkg-source to build the source package if the version of the quilt metadata is
           the one specified, even if dpkg-source doesn't know about it (since dpkg 1.15.5.4).
           Effectively this says that the given version of the quilt metadata is compatible with
           the version 2 that dpkg-source currently supports. The version of the quilt metadata
           is stored in .pc/.version.

       --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 (since dpkg 1.14.18).

       --single-debian-patch
           Use debian/patches/debian-changes instead of debian/patches/debian-changes-version for
           the name of the automatic patch generated during build (since dpkg 1.15.5.4).  This
           option is particularly useful when the package is maintained in a VCS and a patch set
           can't reliably be generated. Instead the current diff with upstream should be stored
           in a single patch. The option would be put in debian/source/local-options and would be
           accompanied by a debian/source/local-patch-header file explaining how the Debian
           changes can be best reviewed, for example in the VCS that is used.

       --create-empty-orig
           Automatically create the main original tarball as empty if it's missing and if there
           are supplementary original tarballs (since dpkg 1.15.6).  This option is meant to be
           used when the source package is just a bundle of multiple upstream software and where
           there's no “main” software.

       --no-unapply-patches, --unapply-patches
           By default, dpkg-source will automatically unapply the patches in the --after-build
           hook if it did apply them during --before-build (--unapply-patches since dpkg 1.15.8,
           --no-unapply-patches since dpkg 1.16.5).  Those options allow you to forcefully
           disable or enable the patch unapplication process. Those options are only allowed in
           debian/source/local-options so that all generated source packages have the same
           behavior by default.

       --abort-on-upstream-changes
           The process fails if an automatic patch has been generated (since dpkg 1.15.8).  This
           option can be used to ensure that all changes were properly recorded in separate quilt
           patches prior to the source package build. This option is not allowed in
           debian/source/options but can be used in debian/source/local-options.

       --auto-commit
           The process doesn't fail if an automatic patch has been generated, instead it's
           immediately recorded in the quilt series.

       Extract options

       --skip-debianization
           Skips extraction of the debian tarball on top of the upstream sources (since dpkg
           1.15.1).

       --skip-patches
           Do not apply patches at the end of the extraction (since dpkg 1.14.18).

   Format: 3.0 (custom)
       Supported since dpkg 1.14.17.  This format is special.  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 preferably 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)
       Supported since dpkg 1.14.17.  This format is experimental.

       A source package in this format consists of a single bundle of a git repository .git to
       hold the source of a package.  There may also be a .gitshallow file listing revisions for
       a shallow git clone.

       Extracting

       The bundle is cloned as a git repository to the target directory.  If there is a
       gitshallow file, it is installed as .git/shallow inside the cloned git repository.

       Note that by default the new repository will have the same branch checked out that was
       checked out in the original source.  (Typically “main”, but it could be anything.)  Any
       other branches will be available under remotes/origin/.

       Building

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

       git-bundle(1) is used to generate a bundle of the git repository.  By default, all
       branches and tags in the repository are included in the bundle.

       Build options

       --git-ref=ref
           Allows specifying a git ref to include in the git bundle. Use disables the default
           behavior of including all branches and tags. May be specified multiple times. The ref
           can be the name of a branch or tag to include. It may also be any parameter that can
           be passed to git-rev-list(1). For example, to include only the main branch, use
           --git-ref=main. To include all tags and branches, except for the private branch, use
           --git-ref=--all --git-ref=^private

       --git-depth=number
           Creates a shallow clone with a history truncated to the specified number of revisions.

   Format: 3.0 (bzr)
       Supported since dpkg 1.14.17.  This format is experimental.  It generates a single tarball
       containing the bzr repository.

       Extracting

       The tarball is unpacked and then bzr 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.

DIAGNOSTICS

   no source format specified in debian/source/format
       The file debian/source/format should always exist and indicate the desired source format.
       For backwards compatibility, format “1.0” is assumed when the file doesn't exist but you
       should not rely on this: at some point in the future dpkg-source will be modified to fail
       when that file doesn't exist.

       The rationale is that format “1.0” is no longer the recommended format, you should usually
       pick one of the newer formats (“3.0 (quilt)”, “3.0 (native)”) but dpkg-source will not do
       this automatically for you.  If you want to continue using the old format, you should be
       explicit about it and put “1.0” in debian/source/format.

   the diff modifies the following upstream files
       When using source format “1.0” it is usually a bad idea to modify upstream files directly
       as the changes end up hidden and mostly undocumented in the .diff.gz file. Instead you
       should store your changes as patches in the debian directory and apply them at build-time.
       To avoid this complexity you can also use the format “3.0 (quilt)” that offers this
       natively.

   cannot represent change to file
       Changes to upstream sources are usually stored with patch files, but not all changes can
       be represented with patches: they can only alter the content of plain text files. If you
       try replacing a file with something of a different type (for example replacing a plain
       file with a symlink or a directory), you will get this error message.

   newly created empty file file will not be represented in diff
       Empty files can't be created with patch files. Thus this change is not recorded in the
       source package and you are warned about it.

   executable mode perms of file will not be represented in diff
       Patch files do not record permissions of files and thus executable permissions are not
       stored in the source package. This warning reminds you of that fact.

   special mode perms of file will not be represented in diff
       Patch files do not record permissions of files and thus modified permissions are not
       stored in the source package. This warning reminds you of that fact.

ENVIRONMENT

       DPKG_COLORS
           Sets the color mode (since dpkg 1.18.5).  The currently accepted values are: auto
           (default), always and never.

       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: 0 and 1 (default).

       SOURCE_DATE_EPOCH
           If set, it will be used as the timestamp (as seconds since the epoch) to clamp the
           mtime in the tar(5) file entries.

       VISUAL
       EDITOR
           Used by the “2.0” and “3.0 (quilt)” source format modules.

       GIT_DIR
       GIT_INDEX_FILE
       GIT_OBJECT_DIRECTORY
       GIT_ALTERNATE_OBJECT_DIRECTORIES
       GIT_WORK_TREE
           Used by the “3.0 (git)” source format modules.

FILES

   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.

   debian/source/include-binaries
       This file contains a list of pathnames of binary files (one per line) relative to the
       source root directory 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.

   debian/source/options
       This file contains a list of long options that should be automatically prepended to the
       set of command line options of a dpkg-source --build or dpkg-source --print-format call.
       Options like --compression and --compression-level are well suited for this file.

       Each option should be put on a separate line. Empty lines and lines starting with ‘#’ are
       ignored.  The leading ‘--’ should be stripped and short options are not allowed.  Optional
       spaces are allowed around the ‘=’ symbol and optional quotes are allowed around the value.
       Here's an example of such a file:

        # let dpkg-source create a debian.tar.bz2 with maximal compression
        compression = "bzip2"
        compression-level = 9
        # use debian/patches/debian-changes as automatic patch
        single-debian-patch
        # ignore changes on config.{sub,guess}
        extend-diff-ignore = "(^|/)(config.sub|config.guess)$"

       Note: format options are not accepted in this file, you should use debian/source/format
       instead.

   debian/source/local-options
       Exactly like debian/source/options except that the file is not included in the generated
       source package. It can be useful to store a preference tied to the maintainer or to the
       VCS repository where the source package is maintained.

   debian/source/local-patch-header
   debian/source/patch-header
       Free form text that is put on top of the automatic patch generated in formats “2.0” or
       “3.0 (quilt)”. local-patch-header is not included in the generated source package while
       patch-header is.

   debian/patches/vendor.series
   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.  The vendor will be the
       lowercase name of the current vendor, or debian if there is no vendor defined.  If the
       vendor-specific series file does not exist, the vendor-less series file will be used.
       Lines starting with ‘#’ are comments and are skipped.  Empty lines are ignored.  Remaining
       lines start with a patch filename (relative to the debian/patches/ 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).

BUGS

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

SEE ALSO

       deb-src-control(5), deb-changelog(5), deb-substvars(5), dsc(5).