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=head1 名前

virt-builder-repository - Build virt-builder source repository easily

=head1 書式

 virt-builder-repository /path/to/repository
    [-i|--interactive] [--gpg-key KEYID]

=head1 説明

Virt-builder is a tool for quickly building new virtual machines. It can be
configured to use template repositories. However creating and maintaining a
repository involves many tasks which can be automated.
virt-builder-repository is a tool helping to manage these repositories.

Virt-builder-repository loops over the files in the directory specified as
argument, compresses the files with a name ending by C<qcow2>, C<raw>,
C<img> or without extension, extracts data from them and creates or updates
the C<index> file.

Some of the image-related data needed for the index file can’t be computed
from the image file. virt-builder-repository first tries to find them in the
existing index file. If data are still missing after this, they are prompted
in interactive mode, otherwise an error will be triggered.

If a C<KEYID> is provided, the generated index file will be signed with this
GPG key.

=head1 例

=head2 Create the initial repository

Create a folder and copy the disk image template files in it. Then run a
command like the following one:

 virt-builder-repository --gpg-key "joe@hacker.org" -i /path/to/folder

Note that this example command runs in interactive mode. To run in automated
mode, a minimal index file needs to be created before running the command
containing sections like this one:

 [template_id]
 file=template_filename.qcow.xz

The file value needs to match the image name extended with the C<.xz> suffix
if the I<--no-compression> parameter is not provided or the image name if no
compression is involved. Other optional data can be prefilled. Default
values are computed by inspecting the disk image.  For more informations,
see L<virt-builder(1)/Creating and signing the index file>.

=head2 Update images in an existing repository

In this use case, a new image or a new revision of an existing image needs
to be added to the repository. Place the corresponding image template files
in the repository folder.

To update the revision of an image, the file needs to have the same name
than the existing one (without the C<xz> extension).

As in the repository creation use case, a minimal fragment can be added to
the index file for the automated mode. This can be done on the signed index
even if it may sound a strange idea: the index will be signed again by the
tool.

To remove an image from the repository, just remove the corresponding image
file before running virt-builder-repository.

Then running the following command will complete and update the index file:

 virt-builder-repository --gpg-key "joe@hacker.org" -i /path/to/folder

virt-builder-repository works in a temporary folder inside the repository
one. If anything wrong happens when running the tool, the repository is left
untouched.

=head1 オプション

=over 4

=item B<--help>

ヘルプを表示します。

=item B<--gpg> GPG

Specify an alternate L<gpg(1)> (GNU Privacy Guard) binary.  You can also use
this to add gpg parameters, for example to specify an alternate home
directory:

 virt-builder-repository --gpg "gpg --homedir /tmp" [...]

This can also be used to avoid gpg asking for the key passphrase:

 virt-builder-repository --gpg "gpg --passphrase-file /tmp/pass --batch" [...]

=item B<-K> KEYID

=item B<--gpg-key> KEYID

Specify the GPG key to be used to sign the repository index file.  If not
provided, the index will left unsigned. C<KEYID> is used to identify the GPG
key to use. This value is passed to gpg’s I<--default-key> option and can
thus be an email address or a fingerprint.

B<NOTE>: by default, virt-builder-repository searches for the key in the
user’s GPG keyring.

=item B<-i>

=item B<--interactive>

Prompt for missing data. Default values are computed from the disk image.

When prompted for data, inputting C<-> corresponds to leaving the value
empty. This can be used to avoid setting the default computed value.

=item B<--no-compression>

Don’t compress the template images.

=item B<--machine-readable>

=item B<--machine-readable>=format

このオプションは、他のプログラムにより解析されるときに、よりマシンに易しい出力を作成するために使用されます。以下の L</マシン可読な出力> 参照。

=item B<--colors>

=item B<--colours>

Use ANSI colour sequences to colourize messages.  This is the default when
the output is a tty.  If the output of the program is redirected to a file,
ANSI colour sequences are disabled unless you use this option.

=item B<-q>

=item B<--quiet>

Don’t print ordinary progress messages.

=item B<-v>

=item B<--verbose>

Enable debug messages and/or produce verbose output.

When reporting bugs, use this option and attach the complete output to your
bug report.

=item B<-V>

=item B<--version>

バージョン番号を表示して、終了します。

=item B<-x>

libguestfs API 呼び出しのトレースを有効にします。

=back

=head1 マシン可読な出力

The I<--machine-readable> option can be used to make the output more machine
friendly, which is useful when calling virt-builder-repository from other
programs, GUIs etc.

Use the option on its own to query the capabilities of the
virt-builder-repository binary.  Typical output looks like this:

 $ virt-builder-repository --machine-readable
 virt-builder-repository

A list of features is printed, one per line, and the program exits with
status 0.

It is possible to specify a format string for controlling the output; see
L<guestfs(3)/ADVANCED MACHINE READABLE OUTPUT>.

=head1 終了ステータス

このプログラムは、成功すると 0 を、エラーがあると 0 以外を返します。

=head1 関連項目

L<virt-builder(1)> L<http://libguestfs.org/>.

=head1 著者

Cédric Bosdonnat L<mailto:cbosdonnat@suse.com>

=head1 COPYRIGHT

Copyright (C) 2016-2020 SUSE Inc.

