754 lines
21 KiB
C
754 lines
21 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
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*
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* Copyright (C) 2011,2013 Colin Walters <walters@verbum.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include "ostree-repo-private.h"
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#include "otutil.h"
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static gboolean
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add_ref_to_set (const char *remote,
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GFile *base,
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GFile *child,
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GHashTable *refs,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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char *contents;
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char *relpath;
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gsize len;
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GString *refname;
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if (!g_file_load_contents (child, cancellable, &contents, &len, NULL, error))
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goto out;
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g_strchomp (contents);
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refname = g_string_new ("");
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if (remote)
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{
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g_string_append (refname, remote);
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g_string_append_c (refname, ':');
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}
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relpath = g_file_get_relative_path (base, child);
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g_string_append (refname, relpath);
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g_free (relpath);
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g_hash_table_insert (refs, g_string_free (refname, FALSE), contents);
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ret = TRUE;
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out:
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return ret;
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}
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static gboolean
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write_checksum_file_at (OstreeRepo *self,
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int dfd,
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const char *name,
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const char *sha256,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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const char *lastslash;
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if (!ostree_validate_checksum_string (sha256, error))
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goto out;
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if (ostree_validate_checksum_string (name, NULL))
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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"Rev name '%s' looks like a checksum", name);
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goto out;
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}
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if (!*name)
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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"Invalid empty ref name");
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goto out;
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}
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lastslash = strrchr (name, '/');
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if (lastslash)
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{
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char *parent = strdupa (name);
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parent[lastslash - name] = '\0';
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if (!glnx_shutil_mkdir_p_at (dfd, parent, 0777, cancellable, error))
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goto out;
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}
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{
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size_t l = strlen (sha256);
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char *bufnl = alloca (l + 2);
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memcpy (bufnl, sha256, l);
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bufnl[l] = '\n';
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bufnl[l+1] = '\0';
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if (!_ostree_repo_file_replace_contents (self, dfd, name, (guint8*)bufnl, l + 1,
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cancellable, error))
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goto out;
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}
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ret = TRUE;
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out:
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return ret;
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}
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static gboolean
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find_ref_in_remotes (OstreeRepo *self,
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const char *rev,
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GFile **out_file,
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GError **error)
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{
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gboolean ret = FALSE;
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g_autoptr(GFileEnumerator) dir_enum = NULL;
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g_autoptr(GFile) ret_file = NULL;
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dir_enum = g_file_enumerate_children (self->remote_heads_dir, OSTREE_GIO_FAST_QUERYINFO,
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G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
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NULL, error);
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if (!dir_enum)
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goto out;
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while (TRUE)
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{
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GFileInfo *file_info;
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GFile *child;
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if (!gs_file_enumerator_iterate (dir_enum, &file_info, &child,
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NULL, error))
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goto out;
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if (file_info == NULL)
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break;
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if (g_file_info_get_file_type (file_info) != G_FILE_TYPE_DIRECTORY)
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continue;
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g_clear_object (&ret_file);
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ret_file = g_file_resolve_relative_path (child, rev);
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if (!g_file_query_exists (ret_file, NULL))
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g_clear_object (&ret_file);
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else
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break;
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}
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ret = TRUE;
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ot_transfer_out_value (out_file, &ret_file);
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out:
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return ret;
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}
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static gboolean
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resolve_refspec (OstreeRepo *self,
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const char *remote,
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const char *ref,
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gboolean allow_noent,
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char **out_rev,
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GError **error);
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static gboolean
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resolve_refspec_fallback (OstreeRepo *self,
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const char *remote,
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const char *ref,
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gboolean allow_noent,
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char **out_rev,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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g_autofree char *ret_rev = NULL;
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if (self->parent_repo)
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{
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if (!resolve_refspec (self->parent_repo, remote, ref,
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allow_noent, &ret_rev, error))
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goto out;
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}
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else if (!allow_noent)
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND,
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"Refspec '%s%s%s' not found",
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remote ? remote : "",
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remote ? ":" : "",
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ref);
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goto out;
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}
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ret = TRUE;
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ot_transfer_out_value (out_rev, &ret_rev);
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out:
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return ret;
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}
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static gboolean
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resolve_refspec (OstreeRepo *self,
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const char *remote,
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const char *ref,
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gboolean allow_noent,
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char **out_rev,
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GError **error)
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{
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gboolean ret = FALSE;
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__attribute__((unused)) GCancellable *cancellable = NULL;
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GError *temp_error = NULL;
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g_autofree char *ret_rev = NULL;
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g_autoptr(GFile) child = NULL;
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g_return_val_if_fail (ref != NULL, FALSE);
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/* We intentionally don't allow a ref that looks like a checksum */
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if (ostree_validate_checksum_string (ref, NULL))
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{
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ret_rev = g_strdup (ref);
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}
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else if (remote != NULL)
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{
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child = ot_gfile_resolve_path_printf (self->remote_heads_dir, "%s/%s",
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remote, ref);
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if (!g_file_query_exists (child, NULL))
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g_clear_object (&child);
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}
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else
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{
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child = g_file_resolve_relative_path (self->local_heads_dir, ref);
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if (!g_file_query_exists (child, NULL))
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{
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g_clear_object (&child);
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child = g_file_resolve_relative_path (self->remote_heads_dir, ref);
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if (!g_file_query_exists (child, NULL))
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{
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g_clear_object (&child);
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if (!find_ref_in_remotes (self, ref, &child, error))
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goto out;
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}
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}
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}
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if (child)
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{
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if ((ret_rev = gs_file_load_contents_utf8 (child, NULL, &temp_error)) == NULL)
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{
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g_propagate_error (error, temp_error);
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g_prefix_error (error, "Couldn't open ref '%s': ", gs_file_get_path_cached (child));
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goto out;
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}
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g_strchomp (ret_rev);
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if (!ostree_validate_checksum_string (ret_rev, error))
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goto out;
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}
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else
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{
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if (!resolve_refspec_fallback (self, remote, ref, allow_noent,
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&ret_rev, cancellable, error))
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goto out;
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}
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ot_transfer_out_value (out_rev, &ret_rev);
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ret = TRUE;
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out:
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return ret;
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}
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/**
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* ostree_repo_resolve_partial_checksum:
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* @self: Repo
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* @refspec: A refspec
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* @full_checksum (out) (transfer full): A full checksum corresponding to the truncated ref given
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* @error: Error
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*
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* Look up the existing refspec checksums. If the given ref is a unique truncated beginning
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* of a valid checksum it will return that checksum in the parameter @full_checksum
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*/
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static gboolean
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ostree_repo_resolve_partial_checksum (OstreeRepo *self,
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const char *refspec,
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char **full_checksum,
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GError **error)
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{
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gboolean ret = FALSE;
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static const char hexchars[] = "0123456789abcdef";
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gsize off;
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g_autoptr(GHashTable) ref_list = NULL;
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g_autofree char *ret_rev = NULL;
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guint length;
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const char *checksum = NULL;
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OstreeObjectType objtype;
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GHashTableIter hashiter;
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gpointer key, value;
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GVariant *first_commit;
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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/* If the input is longer than 64 chars or contains non-hex chars,
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don't bother looking for it as an object */
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off = strspn (refspec, hexchars);
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if (off > 64 || refspec[off] != '\0')
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return TRUE;
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/* this looks through all objects and adds them to the ref_list if:
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a) they are a commit object AND
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b) the obj checksum starts with the partual checksum defined by "refspec" */
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if (!ostree_repo_list_commit_objects_starting_with (self, refspec, &ref_list, NULL, error))
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goto out;
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length = g_hash_table_size (ref_list);
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g_hash_table_iter_init (&hashiter, ref_list);
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if (g_hash_table_iter_next (&hashiter, &key, &value))
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first_commit = (GVariant*) key;
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else
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first_commit = NULL;
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if (first_commit)
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ostree_object_name_deserialize (first_commit, &checksum, &objtype);
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/* length more than one - multiple commits match partial refspec: is not unique */
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if (length > 1)
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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"Refspec %s not unique", refspec);
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goto out;
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}
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/* length is 1 - a single matching commit gives us our revision */
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else if (length == 1)
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{
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ret_rev = g_strdup (checksum);
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}
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/* Note: if length is 0, then code will return TRUE
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because there is no error, but it will return full_checksum = NULL
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to signal to continue parsing */
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ret = TRUE;
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ot_transfer_out_value (full_checksum, &ret_rev);
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out:
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return ret;
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}
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/**
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* ostree_repo_resolve_rev:
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* @self: Repo
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* @refspec: A refspec
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* @allow_noent: Do not throw an error if refspec does not exist
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* @out_rev: (out) (transfer full): A checksum,or %NULL if @allow_noent is true and it does not exist
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* @error: Error
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*
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* Look up the given refspec, returning the checksum it references in
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* the parameter @out_rev.
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*/
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gboolean
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ostree_repo_resolve_rev (OstreeRepo *self,
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const char *refspec,
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gboolean allow_noent,
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char **out_rev,
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GError **error)
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{
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gboolean ret = FALSE;
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g_autofree char *ret_rev = NULL;
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g_return_val_if_fail (refspec != NULL, FALSE);
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if (ostree_validate_checksum_string (refspec, NULL))
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{
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ret_rev = g_strdup (refspec);
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}
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else if (!ostree_repo_resolve_partial_checksum (self, refspec, &ret_rev, error))
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goto out;
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if (!ret_rev)
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{
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if (error != NULL && *error != NULL)
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goto out;
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if (g_str_has_suffix (refspec, "^"))
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{
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g_autofree char *parent_refspec = NULL;
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g_autofree char *parent_rev = NULL;
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g_autoptr(GVariant) commit = NULL;
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parent_refspec = g_strdup (refspec);
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parent_refspec[strlen(parent_refspec) - 1] = '\0';
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if (!ostree_repo_resolve_rev (self, parent_refspec, allow_noent, &parent_rev, error))
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goto out;
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if (!ostree_repo_load_variant (self, OSTREE_OBJECT_TYPE_COMMIT, parent_rev,
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&commit, error))
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goto out;
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if (!(ret_rev = ostree_commit_get_parent (commit)))
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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"Commit %s has no parent", parent_rev);
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goto out;
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}
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}
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else
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{
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g_autofree char *remote = NULL;
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g_autofree char *ref = NULL;
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if (!ostree_parse_refspec (refspec, &remote, &ref, error))
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goto out;
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if (!resolve_refspec (self, remote, ref, allow_noent,
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&ret_rev, error))
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goto out;
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}
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}
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ret = TRUE;
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ot_transfer_out_value (out_rev, &ret_rev);
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out:
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return ret;
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}
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static gboolean
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enumerate_refs_recurse (OstreeRepo *repo,
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const char *remote,
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GFile *base,
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GFile *dir,
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GHashTable *refs,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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g_autoptr(GFileEnumerator) enumerator = NULL;
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enumerator = g_file_enumerate_children (dir, OSTREE_GIO_FAST_QUERYINFO,
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G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
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cancellable, error);
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if (!enumerator)
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goto out;
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while (TRUE)
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{
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GFileInfo *file_info = NULL;
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GFile *child = NULL;
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if (!gs_file_enumerator_iterate (enumerator, &file_info, &child,
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NULL, error))
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goto out;
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if (file_info == NULL)
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break;
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if (g_file_info_get_file_type (file_info) == G_FILE_TYPE_DIRECTORY)
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{
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if (!enumerate_refs_recurse (repo, remote, base, child, refs, cancellable, error))
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goto out;
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}
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else if (g_file_info_get_file_type (file_info) == G_FILE_TYPE_REGULAR)
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{
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if (!add_ref_to_set (remote, base, child, refs,
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cancellable, error))
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goto out;
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}
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}
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ret = TRUE;
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out:
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return ret;
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}
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/**
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* ostree_repo_list_refs:
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* @self: Repo
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* @refspec_prefix: (allow-none): Only list refs which match this prefix
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* @out_all_refs: (out) (element-type utf8 utf8): Mapping from ref to checksum
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* @cancellable: Cancellable
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* @error: Error
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*
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* If @refspec_prefix is %NULL, list all local and remote refspecs,
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* with their current values in @out_all_refs. Otherwise, only list
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* refspecs which have @refspec_prefix as a prefix.
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*/
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gboolean
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ostree_repo_list_refs (OstreeRepo *self,
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const char *refspec_prefix,
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GHashTable **out_all_refs,
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GCancellable *cancellable,
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GError **error)
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{
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gboolean ret = FALSE;
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g_autoptr(GHashTable) ret_all_refs = NULL;
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g_autofree char *remote = NULL;
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g_autofree char *ref_prefix = NULL;
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ret_all_refs = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
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if (refspec_prefix)
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{
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g_autoptr(GFile) dir = NULL;
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g_autoptr(GFile) child = NULL;
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g_autoptr(GFileInfo) info = NULL;
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if (!ostree_parse_refspec (refspec_prefix, &remote, &ref_prefix, error))
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goto out;
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if (remote)
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dir = g_file_get_child (self->remote_heads_dir, remote);
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else
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dir = g_object_ref (self->local_heads_dir);
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child = g_file_resolve_relative_path (dir, ref_prefix);
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if (!ot_gfile_query_info_allow_noent (child, OSTREE_GIO_FAST_QUERYINFO, 0,
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&info, cancellable, error))
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goto out;
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if (info)
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{
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if (g_file_info_get_file_type (info) == G_FILE_TYPE_DIRECTORY)
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{
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if (!enumerate_refs_recurse (self, remote, child, child,
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ret_all_refs,
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cancellable, error))
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goto out;
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}
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else
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{
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if (!add_ref_to_set (remote, dir, child, ret_all_refs,
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cancellable, error))
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goto out;
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}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
g_autoptr(GFileEnumerator) remote_enumerator = NULL;
|
|
|
|
if (!enumerate_refs_recurse (self, NULL, self->local_heads_dir, self->local_heads_dir,
|
|
ret_all_refs,
|
|
cancellable, error))
|
|
goto out;
|
|
|
|
remote_enumerator = g_file_enumerate_children (self->remote_heads_dir, OSTREE_GIO_FAST_QUERYINFO,
|
|
0,
|
|
cancellable, error);
|
|
if (!remote_enumerator)
|
|
goto out;
|
|
|
|
while (TRUE)
|
|
{
|
|
GFileInfo *info;
|
|
GFile *child;
|
|
const char *name;
|
|
|
|
if (!gs_file_enumerator_iterate (remote_enumerator, &info, &child,
|
|
cancellable, error))
|
|
goto out;
|
|
if (!info)
|
|
break;
|
|
|
|
name = g_file_info_get_name (info);
|
|
if (!enumerate_refs_recurse (self, name, child, child,
|
|
ret_all_refs,
|
|
cancellable, error))
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = TRUE;
|
|
ot_transfer_out_value (out_all_refs, &ret_all_refs);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* ostree_repo_remote_list_refs:
|
|
* @self: Repo
|
|
* @remote_name: Name of the remote.
|
|
* @out_all_refs: (out) (element-type utf8 utf8): Mapping from ref to checksum
|
|
* @cancellable: Cancellable
|
|
* @error: Error
|
|
*
|
|
*/
|
|
gboolean
|
|
ostree_repo_remote_list_refs (OstreeRepo *self,
|
|
const char *remote_name,
|
|
GHashTable **out_all_refs,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
g_autoptr(GBytes) summary_bytes = NULL;
|
|
gboolean ret = FALSE;
|
|
g_autoptr(GHashTable) ret_all_refs = NULL;
|
|
|
|
if (!ostree_repo_remote_fetch_summary (self, remote_name,
|
|
&summary_bytes, NULL,
|
|
cancellable, error))
|
|
goto out;
|
|
|
|
if (summary_bytes == NULL)
|
|
{
|
|
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
|
|
"Remote refs not available; server has no summary file\n");
|
|
goto out;
|
|
}
|
|
else
|
|
{
|
|
g_autoptr(GVariant) summary = NULL;
|
|
g_autoptr(GVariant) ref_map = NULL;
|
|
GVariantIter iter;
|
|
GVariant *child;
|
|
ret_all_refs = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
|
|
|
|
summary = g_variant_new_from_bytes (OSTREE_SUMMARY_GVARIANT_FORMAT,
|
|
summary_bytes, FALSE);
|
|
|
|
ref_map = g_variant_get_child_value (summary, 0);
|
|
|
|
g_variant_iter_init (&iter, ref_map);
|
|
while ((child = g_variant_iter_next_value (&iter)) != NULL)
|
|
{
|
|
const char *ref_name = NULL;
|
|
g_autoptr(GVariant) csum_v = NULL;
|
|
char tmp_checksum[65];
|
|
|
|
g_variant_get_child (child, 0, "&s", &ref_name);
|
|
|
|
if (ref_name != NULL)
|
|
{
|
|
const guchar *csum_bytes;
|
|
|
|
g_variant_get_child (child, 1, "(t@aya{sv})", NULL, &csum_v, NULL);
|
|
csum_bytes = ostree_checksum_bytes_peek_validate (csum_v, error);
|
|
if (csum_bytes == NULL)
|
|
goto out;
|
|
|
|
ostree_checksum_inplace_from_bytes (csum_bytes, tmp_checksum);
|
|
|
|
g_hash_table_insert (ret_all_refs,
|
|
g_strdup (ref_name),
|
|
g_strdup (tmp_checksum));
|
|
}
|
|
|
|
g_variant_unref (child);
|
|
}
|
|
}
|
|
|
|
ret = TRUE;
|
|
ot_transfer_out_value (out_all_refs, &ret_all_refs);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
gboolean
|
|
_ostree_repo_write_ref (OstreeRepo *self,
|
|
const char *remote,
|
|
const char *ref,
|
|
const char *rev,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
glnx_fd_close int dfd = -1;
|
|
|
|
if (remote == NULL)
|
|
{
|
|
if (!glnx_opendirat (self->repo_dir_fd, "refs/heads", TRUE,
|
|
&dfd, error))
|
|
goto out;
|
|
}
|
|
else
|
|
{
|
|
glnx_fd_close int refs_remotes_dfd = -1;
|
|
|
|
if (!glnx_opendirat (self->repo_dir_fd, "refs/remotes", TRUE,
|
|
&refs_remotes_dfd, error))
|
|
goto out;
|
|
|
|
if (rev != NULL)
|
|
{
|
|
/* Ensure we have a dir for the remote */
|
|
if (!glnx_shutil_mkdir_p_at (refs_remotes_dfd, remote, 0777, cancellable, error))
|
|
goto out;
|
|
}
|
|
|
|
if (!glnx_opendirat (refs_remotes_dfd, remote, TRUE, &dfd, error))
|
|
goto out;
|
|
}
|
|
|
|
if (rev == NULL)
|
|
{
|
|
if (unlinkat (dfd, ref, 0) != 0)
|
|
{
|
|
if (errno != ENOENT)
|
|
{
|
|
glnx_set_error_from_errno (error);
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!write_checksum_file_at (self, dfd, ref, rev, cancellable, error))
|
|
goto out;
|
|
}
|
|
|
|
if (!_ostree_repo_update_mtime (self, error))
|
|
goto out;
|
|
|
|
ret = TRUE;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
gboolean
|
|
_ostree_repo_update_refs (OstreeRepo *self,
|
|
GHashTable *refs,
|
|
GCancellable *cancellable,
|
|
GError **error)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GHashTableIter hash_iter;
|
|
gpointer key, value;
|
|
|
|
g_hash_table_iter_init (&hash_iter, refs);
|
|
while (g_hash_table_iter_next (&hash_iter, &key, &value))
|
|
{
|
|
const char *refspec = key;
|
|
const char *rev = value;
|
|
g_autofree char *remote = NULL;
|
|
g_autofree char *ref = NULL;
|
|
|
|
if (!ostree_parse_refspec (refspec, &remote, &ref, error))
|
|
goto out;
|
|
|
|
if (!_ostree_repo_write_ref (self, remote, ref, rev,
|
|
cancellable, error))
|
|
goto out;
|
|
}
|
|
|
|
ret = TRUE;
|
|
out:
|
|
return ret;
|
|
}
|