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/*
* Copyright (C) 2016 Colin Walters <walters@verbum.org>
*
* SPDX-License-Identifier: LGPL-2.0+
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "otutil.h"
#include "ot-main.h"
#include "ot-builtins.h"
#include "ostree-libarchive-private.h"
#include "ostree.h"
#include "ostree-repo-file.h"
#ifdef HAVE_LIBARCHIVE
#include <archive.h>
#include <archive_entry.h>
#endif
static char *opt_output_path;
static char *opt_subpath;
static char *opt_prefix;
static gboolean opt_no_xattrs;
/* ATTENTION:
* Please remember to update the bash-completion script (bash/ostree) and
* man page (man/ostree-export.xml) when changing the option list.
*/
static GOptionEntry options[] = {
{ "no-xattrs", 0, 0, G_OPTION_ARG_NONE, &opt_no_xattrs, "Skip output of extended attributes", NULL },
{ "subpath", 0, 0, G_OPTION_ARG_FILENAME, &opt_subpath, "Checkout sub-directory PATH", "PATH" },
{ "prefix", 0, 0, G_OPTION_ARG_FILENAME, &opt_prefix, "Add PATH as prefix to archive pathnames", "PATH" },
{ "output", 'o', 0, G_OPTION_ARG_FILENAME, &opt_output_path, "Output to PATH ", "PATH" },
{ NULL }
};
#ifdef HAVE_LIBARCHIVE
static void
propagate_libarchive_error (GError **error,
struct archive *a)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"%s", archive_error_string (a));
}
#endif
gboolean
ostree_builtin_export (int argc, char **argv, OstreeCommandInvocation *invocation, GCancellable *cancellable, GError **error)
{
g_autoptr(GOptionContext) context = NULL;
g_autoptr(OstreeRepo) repo = NULL;
gboolean ret = FALSE;
g_autoptr(GFile) root = NULL;
g_autoptr(GFile) subtree = NULL;
g_autofree char *commit = NULL;
g_autoptr(GVariant) commit_data = NULL;
#ifdef HAVE_LIBARCHIVE
const char *rev;
g_autoptr(OtAutoArchiveWrite) a = NULL;
OstreeRepoExportArchiveOptions opts = { 0, };
#endif
context = g_option_context_new ("COMMIT");
if (!ostree_option_context_parse (context, options, &argc, &argv, invocation, &repo, cancellable, error))
goto out;
#ifdef HAVE_LIBARCHIVE
if (argc <= 1)
{
ot_util_usage_error (context, "A COMMIT argument is required", error);
goto out;
}
rev = argv[1];
a = archive_write_new ();
/* Yes, this is hardcoded for now. There is
* archive_write_set_format_filter_by_ext() but it's fairly magic.
* Many programs have support now for GNU tar, so should be a good
* default. I also don't want to lock us into everything libarchive
* supports.
*/
if (archive_write_set_format_gnutar (a) != ARCHIVE_OK)
{
propagate_libarchive_error (error, a);
goto out;
}
if (archive_write_add_filter_none (a) != ARCHIVE_OK)
{
propagate_libarchive_error (error, a);
goto out;
}
if (opt_output_path)
{
if (archive_write_open_filename (a, opt_output_path) != ARCHIVE_OK)
{
propagate_libarchive_error (error, a);
goto out;
}
}
else
{
if (archive_write_open_FILE (a, stdout) != ARCHIVE_OK)
{
propagate_libarchive_error (error, a);
goto out;
}
}
if (opt_no_xattrs)
opts.disable_xattrs = TRUE;
if (!ostree_repo_read_commit (repo, rev, &root, &commit, cancellable, error))
goto out;
if (!ostree_repo_load_variant (repo, OSTREE_OBJECT_TYPE_COMMIT, commit, &commit_data, error))
goto out;
opts.timestamp_secs = ostree_commit_get_timestamp (commit_data);
if (opt_subpath)
subtree = g_file_resolve_relative_path (root, opt_subpath);
else
subtree = g_object_ref (root);
opts.path_prefix = opt_prefix;
if (!ostree_repo_export_tree_to_archive (repo, &opts, (OstreeRepoFile*)subtree, a,
cancellable, error))
goto out;
if (archive_write_close (a) != ARCHIVE_OK)
{
propagate_libarchive_error (error, a);
goto out;
}
#else
g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
"This version of ostree is not compiled with libarchive support");
goto out;
#endif
ret = TRUE;
out:
return ret;
}
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