debcheckout - checkout the development repository of a Debian
    package
debcheckout retrieves the information about the Version
    Control System used to maintain a given Debian package (the PACKAGE
    argument), and then checks out the latest (potentially unreleased) version
    of the package from its repository. By default the repository is checked out
    to the PACKAGE directory; this can be overridden by providing the
    DESTDIR argument.
The information about where the repository is available is
    expected to be found in Vcs-* fields available in the source package
    record. For example, the vim package exposes such information with a
    field like Vcs-Hg: http://hg.debian.org/hg/pkg-vim/vim, you
    can see it by grepping through apt-cache showsrc vim.
If more than one source package record containing Vcs-*
    fields is available, debcheckout will select the record with the
    highest version number. Alternatively, a particular version may be selected
    from those available by specifying the package name as
    PACKAGE=VERSION.
If you already know the URL of a given repository you can invoke
    debcheckout directly on it, but you will probably need to pass the
    appropriate -t flag. That is, some heuristics are in use to guess the
    repository type from the URL; if they fail, you might want to override the
    guessed type using -t.
The currently supported version control systems are: Arch (arch),
    Bazaar (bzr), CVS (cvs), Darcs (darcs), Git (git), Mercurial (hg) and
    Subversion (svn).
GENERAL OPTIONS
  - -a, --auth
- Work in authenticated mode; this means that for known repositories (mainly
      those hosted on https://salsa.debian.org) URL rewriting is
      attempted before checking out, to ensure that the repository can be
      committed to. For example, for Git repositories hosted on Salsa this means
      that git@salsa.debian.org:...git will be used instead of
      https://salsa.debian.org/...git.
    There are built-in rules for salsa.debian.org,
        alioth.debian.org and github.com. Other hosts can be configured using
        DEBCHECKOUT_AUTH_URLS. 
- -d, --details
- Only print a list of detailed information about the package repository,
      without checking it out; the output format is a list of fields, each field
      being a pair of TAB-separated field name and field value. The actual
      fields depend on the repository type. This action might require a network
      connection to the remote repository.
    Also see -p. This option and -p are mutually
        exclusive. 
- -h, --help
- Print a detailed help message and exit.
- -p, --print
- Only print a summary about package repository information, without
      checking it out; the output format is TAB-separated with two fields:
      repository type, repository URL. This action works offline, it only uses
      "static" information as known by APT's cache.
    Also see -d. This option and -d are mutually
        exclusive. 
- -P package,
    --package package
- When checking out a repository URL, instead of trying to guess the package
      name from the URL, use this package name.
- -t TYPE, --type
    TYPE
- Override the repository type (which defaults to some heuristics based on
      the URL or, in case of heuristic failure, the fallback "git");
      should be one of the currently supported repository types.
- -u USERNAME,
    --user USERNAME
- Specify the login name to be used in authenticated mode (see -a).
      This option implies -a: you don't need to specify both.
- -f FILE, --file
    FILE
- Specify that the named file should be extracted from the repository and
      placed in the destination directory. May be used more than once to extract
      multiple files.
- --source=never|auto|download-only|always
- Some packages only place the debian directory in version control.
      debcheckout can retrieve the remaining parts of the source using
      apt-get source and move the files into the checkout.
  - never
- Only use the repository.
- auto (default)
- If the repository only contains the debian directory, retrieve the
      source package, unpack it, and also place the .orig.tar.gz file
      into the current directory. Else, do nothing.
- download-only
- Always retrieve the .orig.tar.gz file, but do not unpack it.
- always
- Always retrieve the .orig.tar.gz file, and if the repository only
      contains the debian directory, unpack it.
 
VCS-SPECIFIC OPTIONS
GIT-SPECIFIC OPTIONS
  - --git-track
    BRANCHES
- Specify a list of remote branches which will be set up for tracking (as in
      git branch --track, see git-branch(1)) after
      the remote Git repository has been cloned. The list should be given as a
      space-separated list of branch names.
    As a shorthand, the string "*" can be given
        to require tracking of all remote branches. 
The two configuration files /etc/devscripts.conf and
    ~/.devscripts are sourced by a shell in that order to set
    configuration variables. Command line options can be used to override
    configuration file settings. Environment variable settings are ignored for
    this purpose. The currently recognised variables are:
  - DEBCHECKOUT_AUTH_URLS
- This variable should be a space separated list of Perl regular expressions
      and replacement texts, which must come in pairs: REGEXP TEXT
      REGEXP TEXT ... and so on. Each pair denotes a substitution
      which is applied to repository URLs if other built-in means of building
      URLs for authenticated mode (see -a) have failed.
    References to matching substrings in the replacement texts are
        allowed as usual in Perl by the means of
        $1,
        $2, ... and so on. This setting is used to configure the "authenticated
        mode" location for repositories. The Debian repositories on
        salsa.debian.org are implicitly defined, as is github.com. Here is a sample snippet suitable for the configuration
      files:  DEBCHECKOUT_AUTH_URLS='
  ^\w+://(svn\.example\.com)/(.*)    svn+ssh://$1/srv/svn/$2
  ^\w+://(git\.example\.com)/(.*)    git+ssh://$1/home/git/$2
 '
    Note that whitespace is not allowed in either regexps or
        replacement texts. Also, given that configuration files are sourced by a
        shell, you probably want to use single quotes around the value of this
        variable. 
- DEBCHECKOUT_SOURCE
- This variable determines under what scenarios the associated orig.tar.gz
      for a package will be downloaded. See the --source option for a
      description of the values.
- DEBCHECKOUT_USER
- This variable sets the username for authenticated mode. It can be
      overridden with the --user option. Setting this variable does not
      imply the use of authenticated mode, it still has to be activated with
      --auth.
apt-cache(8), Section 6.2.5 of the Debian Developer's
    Reference (for more information about Vcs-* fields):
    https://www.debian.org/doc/developers-reference/best-pkging-practices.html#bpp-vcs.
debcheckout and this manpage have been written by Stefano
    Zacchiroli <zack@debian.org>.