lib/repo-finder: Add OstreeRepoFinderOverride
This is another OstreeRepoFinder implementation; it returns results from a given set of URIs. It’s designed to be used for implementing user overrides to other repo-finders, or for implementing unit tests. Signed-off-by: Philip Withnall <withnall@endlessm.com> Closes: #1281 Approved by: mwleeds
This commit is contained in:
Philip Withnall
Atomic Bot
parent
a1f020ffa4
commit
2531d8fe63
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@ -46,6 +46,7 @@ libostree_public_headers += \
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src/libostree/ostree-repo-finder-avahi.h \
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src/libostree/ostree-repo-finder-avahi.h \
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src/libostree/ostree-repo-finder-config.h \
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src/libostree/ostree-repo-finder-config.h \
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src/libostree/ostree-repo-finder-mount.h \
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src/libostree/ostree-repo-finder-mount.h \
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src/libostree/ostree-repo-finder-override.h \
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$(NULL)
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$(NULL)
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endif
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endif
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@ -156,6 +156,7 @@ libostree_experimental_headers = \
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src/libostree/ostree-repo-finder-avahi.h \
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src/libostree/ostree-repo-finder-avahi.h \
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src/libostree/ostree-repo-finder-config.h \
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src/libostree/ostree-repo-finder-config.h \
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src/libostree/ostree-repo-finder-mount.h \
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src/libostree/ostree-repo-finder-mount.h \
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src/libostree/ostree-repo-finder-override.h \
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$(NULL)
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$(NULL)
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if !ENABLE_EXPERIMENTAL_API
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if !ENABLE_EXPERIMENTAL_API
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libostree_1_la_SOURCES += $(libostree_experimental_headers)
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libostree_1_la_SOURCES += $(libostree_experimental_headers)
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@ -167,6 +168,7 @@ libostree_1_la_SOURCES += \
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src/libostree/ostree-repo-finder-avahi.c \
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src/libostree/ostree-repo-finder-avahi.c \
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src/libostree/ostree-repo-finder-config.c \
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src/libostree/ostree-repo-finder-config.c \
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src/libostree/ostree-repo-finder-mount.c \
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src/libostree/ostree-repo-finder-mount.c \
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src/libostree/ostree-repo-finder-override.c \
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$(NULL)
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$(NULL)
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if USE_AVAHI
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if USE_AVAHI
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@ -76,6 +76,15 @@ ostree_repo_finder_mount_new
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ostree_repo_finder_mount_get_type
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ostree_repo_finder_mount_get_type
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</SECTION>
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</SECTION>
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<SECTION>
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<FILE>ostree-repo-finder-override</FILE>
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OstreeRepoFinderOverride
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ostree_repo_finder_override_new
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ostree_repo_finder_override_add_uri
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<SUBSECTION Standard>
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ostree_repo_finder_override_get_type
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</SECTION>
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<SECTION>
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<SECTION>
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<FILE>ostree-misc-experimental</FILE>
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<FILE>ostree-misc-experimental</FILE>
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ostree_repo_get_collection_id
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ostree_repo_get_collection_id
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@ -82,3 +82,10 @@ LIBOSTREE_2017.12_EXPERIMENTAL {
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global:
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global:
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ostree_repo_resolve_collection_ref;
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ostree_repo_resolve_collection_ref;
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} LIBOSTREE_2017.8_EXPERIMENTAL;
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} LIBOSTREE_2017.8_EXPERIMENTAL;
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LIBOSTREE_2017.13_EXPERIMENTAL {
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global:
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ostree_repo_finder_override_add_uri;
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ostree_repo_finder_override_get_type;
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ostree_repo_finder_override_new;
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} LIBOSTREE_2017.12_EXPERIMENTAL;
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@ -66,6 +66,7 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinder, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderAvahi, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderAvahi, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderConfig, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderConfig, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderMount, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderMount, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderOverride, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderResult, ostree_repo_finder_result_free)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderResult, ostree_repo_finder_result_free)
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G_DEFINE_AUTO_CLEANUP_FREE_FUNC (OstreeRepoFinderResultv, ostree_repo_finder_result_freev, NULL)
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G_DEFINE_AUTO_CLEANUP_FREE_FUNC (OstreeRepoFinderResultv, ostree_repo_finder_result_freev, NULL)
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#endif /* OSTREE_ENABLE_EXPERIMENTAL_API */
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#endif /* OSTREE_ENABLE_EXPERIMENTAL_API */
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@ -223,6 +223,9 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderConfig, g_object_unref)
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#include "ostree-repo-finder-mount.h"
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#include "ostree-repo-finder-mount.h"
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderMount, g_object_unref)
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderMount, g_object_unref)
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#include "ostree-repo-finder-override.h"
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (OstreeRepoFinderOverride, g_object_unref)
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#endif
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#endif
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G_END_DECLS
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G_END_DECLS
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@ -0,0 +1,322 @@
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/*
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* Copyright © 2017 Endless Mobile, Inc.
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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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* Authors:
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* - Philip Withnall <withnall@endlessm.com>
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*/
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#include "config.h"
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#include <fcntl.h>
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#include <gio/gio.h>
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#include <glib.h>
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#include <glib-object.h>
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#include <libglnx.h>
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#include "ostree-autocleanups.h"
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#include "ostree-remote-private.h"
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#include "ostree-repo.h"
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#include "ostree-repo-private.h"
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#include "ostree-repo-finder.h"
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#include "ostree-repo-finder-override.h"
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/**
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* SECTION:ostree-repo-finder-override
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* @title: OstreeRepoFinderOverride
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* @short_description: Finds remote repositories from a list of repository URIs
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* @stability: Unstable
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* @include: libostree/ostree-repo-finder-override.h
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*
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* #OstreeRepoFinderOverride is an implementation of #OstreeRepoFinder which
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* looks refs up in a list of remotes given by their URI, and returns the URIs
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* which contain the refs. Duplicate remote URIs are combined into a single
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* #OstreeRepoFinderResult which lists multiple refs.
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*
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* Each result is given an #OstreeRepoFinderResult.priority value of 20, which
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* ranks its results above those from the other default #OstreeRepoFinder
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* implementations.
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*
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* Results can only be returned for a ref if a remote and keyring are configured
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* locally for the collection ID of that ref, otherwise there would be no keys
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* available to verify signatures on commits for that ref.
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*
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* This is intended to be used for user-provided overrides and testing software
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* which uses #OstreeRepoFinder. For production use, #OstreeRepoFinderConfig is
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* recommended instead.
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*
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* Since: 2017.13
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*/
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static void ostree_repo_finder_override_iface_init (OstreeRepoFinderInterface *iface);
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struct _OstreeRepoFinderOverride
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{
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GObject parent_instance;
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GPtrArray *override_uris; /* (owned) (element-type utf8) */
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};
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G_DEFINE_TYPE_WITH_CODE (OstreeRepoFinderOverride, ostree_repo_finder_override, G_TYPE_OBJECT,
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G_IMPLEMENT_INTERFACE (OSTREE_TYPE_REPO_FINDER, ostree_repo_finder_override_iface_init))
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static gint
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results_compare_cb (gconstpointer a,
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gconstpointer b)
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{
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const OstreeRepoFinderResult *result_a = *((const OstreeRepoFinderResult **) a);
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const OstreeRepoFinderResult *result_b = *((const OstreeRepoFinderResult **) b);
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return ostree_repo_finder_result_compare (result_a, result_b);
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}
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/* This must return a valid remote name (suitable for use in a refspec). */
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static gchar *
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uri_and_keyring_to_name (const gchar *uri,
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const gchar *keyring)
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{
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g_autofree gchar *escaped_uri = g_uri_escape_string (uri, NULL, FALSE);
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g_autofree gchar *escaped_keyring = g_uri_escape_string (keyring, NULL, FALSE);
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/* FIXME: Need a better separator than `_`, since it’s not escaped in the input. */
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g_autofree gchar *out = g_strdup_printf ("%s_%s", escaped_uri, escaped_keyring);
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for (gsize i = 0; out[i] != '\0'; i++)
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{
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if (out[i] == '%')
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out[i] = '_';
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}
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g_return_val_if_fail (ostree_validate_remote_name (out, NULL), NULL);
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return g_steal_pointer (&out);
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}
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/* Version of ostree_repo_remote_list_collection_refs() which takes an
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* #OstreeRemote. */
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static gboolean
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repo_remote_list_collection_refs (OstreeRepo *repo,
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const gchar *remote_uri,
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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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g_autofree gchar *name = uri_and_keyring_to_name (remote_uri, "");
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g_autoptr(OstreeRemote) remote = ostree_remote_new (name);
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g_key_file_set_string (remote->options, remote->group, "url", remote_uri);
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gboolean remote_already_existed = _ostree_repo_add_remote (repo, remote);
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gboolean success = ostree_repo_remote_list_collection_refs (repo,
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remote->name,
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out_all_refs,
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cancellable,
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error);
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if (!remote_already_existed)
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_ostree_repo_remove_remote (repo, remote);
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return success;
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}
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static void
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ostree_repo_finder_override_resolve_async (OstreeRepoFinder *finder,
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const OstreeCollectionRef * const *refs,
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OstreeRepo *parent_repo,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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OstreeRepoFinderOverride *self = OSTREE_REPO_FINDER_OVERRIDE (finder);
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g_autoptr(GTask) task = NULL;
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g_autoptr(GPtrArray) results = NULL;
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const gint priority = 20; /* arbitrarily chosen; higher priority than the others */
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gsize i, j;
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g_autoptr(GHashTable) repo_remote_to_refs = NULL; /* (element-type OstreeRemote GHashTable) */
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GHashTable *supported_ref_to_checksum; /* (element-type OstreeCollectionRef utf8) */
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GHashTableIter iter;
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const gchar *remote_uri;
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OstreeRemote *remote;
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task = g_task_new (finder, cancellable, callback, user_data);
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g_task_set_source_tag (task, ostree_repo_finder_override_resolve_async);
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results = g_ptr_array_new_with_free_func ((GDestroyNotify) ostree_repo_finder_result_free);
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repo_remote_to_refs = g_hash_table_new_full (g_direct_hash, g_direct_equal,
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(GDestroyNotify) ostree_remote_unref,
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(GDestroyNotify) g_hash_table_unref);
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g_debug ("%s: Checking %u overrides", G_STRFUNC, self->override_uris->len);
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for (i = 0; i < self->override_uris->len; i++)
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{
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g_autoptr(GError) local_error = NULL;
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g_autoptr(GHashTable) remote_refs = NULL; /* (element-type OstreeCollectionRef utf8) */
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const gchar *checksum;
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gboolean resolved_a_ref = FALSE;
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remote_uri = self->override_uris->pdata[i];
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if (!repo_remote_list_collection_refs (parent_repo, remote_uri,
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&remote_refs, cancellable,
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&local_error))
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{
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g_debug ("Ignoring remote ‘%s’ due to error loading its refs: %s",
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remote_uri, local_error->message);
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g_clear_error (&local_error);
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continue;
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}
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for (j = 0; refs[j] != NULL; j++)
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{
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g_autoptr(OstreeRemote) keyring_remote = NULL;
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/* Look up the GPG keyring for this ref. */
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keyring_remote = ostree_repo_resolve_keyring_for_collection (parent_repo,
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refs[j]->collection_id,
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cancellable, &local_error);
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if (keyring_remote == NULL)
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{
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g_debug ("Ignoring ref (%s, %s) due to missing keyring: %s",
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refs[j]->collection_id, refs[j]->ref_name, local_error->message);
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g_clear_error (&local_error);
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continue;
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}
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if (g_hash_table_lookup_extended (remote_refs, refs[j], NULL, (gpointer *) &checksum))
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{
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g_autoptr(OstreeRemote) remote = NULL;
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/* The requested ref is listed in the refs for this remote. Add
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* the remote to the results, and the ref to its
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* @supported_ref_to_checksum. */
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g_debug ("Resolved ref (%s, %s) to remote ‘%s’.",
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refs[j]->collection_id, refs[j]->ref_name, remote_uri);
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resolved_a_ref = TRUE;
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/* Build an #OstreeRemote. Use the escaped URI, since remote->name
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* is used in file paths, so needs to not contain special characters. */
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g_autofree gchar *name = uri_and_keyring_to_name (remote_uri, keyring_remote->name);
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remote = ostree_remote_new_dynamic (name, keyring_remote->name);
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/* gpg-verify-summary is false since we use the unsigned summary file support. */
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g_key_file_set_string (remote->options, remote->group, "url", remote_uri);
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g_key_file_set_boolean (remote->options, remote->group, "gpg-verify", TRUE);
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g_key_file_set_boolean (remote->options, remote->group, "gpg-verify-summary", FALSE);
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supported_ref_to_checksum = g_hash_table_lookup (repo_remote_to_refs, remote);
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if (supported_ref_to_checksum == NULL)
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{
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supported_ref_to_checksum = g_hash_table_new_full (ostree_collection_ref_hash,
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ostree_collection_ref_equal,
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NULL, g_free);
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g_hash_table_insert (repo_remote_to_refs, ostree_remote_ref (remote), supported_ref_to_checksum /* transfer */);
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}
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g_hash_table_insert (supported_ref_to_checksum,
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(gpointer) refs[j], g_strdup (checksum));
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}
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}
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if (!resolved_a_ref)
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||||||
|
g_debug ("Ignoring remote ‘%s’ due to it not advertising any of the requested refs.",
|
||||||
|
remote_uri);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Aggregate the results. */
|
||||||
|
g_hash_table_iter_init (&iter, repo_remote_to_refs);
|
||||||
|
|
||||||
|
while (g_hash_table_iter_next (&iter, (gpointer *) &remote, (gpointer *) &supported_ref_to_checksum))
|
||||||
|
g_ptr_array_add (results, ostree_repo_finder_result_new (remote, finder, priority, supported_ref_to_checksum, 0));
|
||||||
|
|
||||||
|
g_ptr_array_sort (results, results_compare_cb);
|
||||||
|
|
||||||
|
g_task_return_pointer (task, g_steal_pointer (&results), (GDestroyNotify) g_ptr_array_unref);
|
||||||
|
}
|
||||||
|
|
||||||
|
static GPtrArray *
|
||||||
|
ostree_repo_finder_override_resolve_finish (OstreeRepoFinder *finder,
|
||||||
|
GAsyncResult *result,
|
||||||
|
GError **error)
|
||||||
|
{
|
||||||
|
g_return_val_if_fail (g_task_is_valid (result, finder), NULL);
|
||||||
|
return g_task_propagate_pointer (G_TASK (result), error);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
ostree_repo_finder_override_init (OstreeRepoFinderOverride *self)
|
||||||
|
{
|
||||||
|
self->override_uris = g_ptr_array_new_with_free_func ((GDestroyNotify) g_free);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
ostree_repo_finder_override_finalize (GObject *object)
|
||||||
|
{
|
||||||
|
OstreeRepoFinderOverride *self = OSTREE_REPO_FINDER_OVERRIDE (object);
|
||||||
|
|
||||||
|
g_clear_pointer (&self->override_uris, g_ptr_array_unref);
|
||||||
|
|
||||||
|
G_OBJECT_CLASS (ostree_repo_finder_override_parent_class)->finalize (object);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
ostree_repo_finder_override_class_init (OstreeRepoFinderOverrideClass *klass)
|
||||||
|
{
|
||||||
|
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
||||||
|
|
||||||
|
object_class->finalize = ostree_repo_finder_override_finalize;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void
|
||||||
|
ostree_repo_finder_override_iface_init (OstreeRepoFinderInterface *iface)
|
||||||
|
{
|
||||||
|
iface->resolve_async = ostree_repo_finder_override_resolve_async;
|
||||||
|
iface->resolve_finish = ostree_repo_finder_override_resolve_finish;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* ostree_repo_finder_override_new:
|
||||||
|
*
|
||||||
|
* Create a new #OstreeRepoFinderOverride.
|
||||||
|
*
|
||||||
|
* Returns: (transfer full): a new #OstreeRepoFinderOverride
|
||||||
|
* Since: 2017.13
|
||||||
|
*/
|
||||||
|
OstreeRepoFinderOverride *
|
||||||
|
ostree_repo_finder_override_new (void)
|
||||||
|
{
|
||||||
|
return g_object_new (OSTREE_TYPE_REPO_FINDER_OVERRIDE, NULL);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* ostree_repo_finder_override_add_uri:
|
||||||
|
* @uri: URI to add to the repo finder
|
||||||
|
*
|
||||||
|
* Add the given @uri to the set of URIs which the repo finder will search for
|
||||||
|
* matching refs when ostree_repo_finder_resolve_async() is called on it.
|
||||||
|
*
|
||||||
|
* Since: 2017.13
|
||||||
|
*/
|
||||||
|
void
|
||||||
|
ostree_repo_finder_override_add_uri (OstreeRepoFinderOverride *self,
|
||||||
|
const gchar *uri)
|
||||||
|
{
|
||||||
|
g_return_if_fail (OSTREE_IS_REPO_FINDER_OVERRIDE (self));
|
||||||
|
g_return_if_fail (uri != NULL);
|
||||||
|
|
||||||
|
g_ptr_array_add (self->override_uris, g_strdup (uri));
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,58 @@
|
||||||
|
/*
|
||||||
|
* Copyright © 2017 Endless Mobile, Inc.
|
||||||
|
*
|
||||||
|
* 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, write to the
|
||||||
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||||
|
* Boston, MA 02111-1307, USA.
|
||||||
|
*
|
||||||
|
* Authors:
|
||||||
|
* - Philip Withnall <withnall@endlessm.com>
|
||||||
|
*/
|
||||||
|
|
||||||
|
#pragma once
|
||||||
|
|
||||||
|
#include <gio/gio.h>
|
||||||
|
#include <glib.h>
|
||||||
|
#include <glib-object.h>
|
||||||
|
|
||||||
|
#include "ostree-repo-finder.h"
|
||||||
|
#include "ostree-types.h"
|
||||||
|
|
||||||
|
G_BEGIN_DECLS
|
||||||
|
|
||||||
|
#define OSTREE_TYPE_REPO_FINDER_OVERRIDE (ostree_repo_finder_override_get_type ())
|
||||||
|
|
||||||
|
/* Manually expanded version of the following, omitting autoptr support (for GLib < 2.44):
|
||||||
|
_OSTREE_PUBLIC
|
||||||
|
G_DECLARE_FINAL_TYPE (OstreeRepoFinderOverride, ostree_repo_finder_override, OSTREE, REPO_FINDER_OVERRIDE, GObject) */
|
||||||
|
|
||||||
|
_OSTREE_PUBLIC
|
||||||
|
GType ostree_repo_finder_override_get_type (void);
|
||||||
|
|
||||||
|
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
|
||||||
|
typedef struct _OstreeRepoFinderOverride OstreeRepoFinderOverride;
|
||||||
|
typedef struct { GObjectClass parent_class; } OstreeRepoFinderOverrideClass;
|
||||||
|
|
||||||
|
static inline OstreeRepoFinderOverride *OSTREE_REPO_FINDER_OVERRIDE (gpointer ptr) { return G_TYPE_CHECK_INSTANCE_CAST (ptr, ostree_repo_finder_override_get_type (), OstreeRepoFinderOverride); }
|
||||||
|
static inline gboolean OSTREE_IS_REPO_FINDER_OVERRIDE (gpointer ptr) { return G_TYPE_CHECK_INSTANCE_TYPE (ptr, ostree_repo_finder_override_get_type ()); }
|
||||||
|
G_GNUC_END_IGNORE_DEPRECATIONS
|
||||||
|
|
||||||
|
_OSTREE_PUBLIC
|
||||||
|
OstreeRepoFinderOverride *ostree_repo_finder_override_new (void);
|
||||||
|
|
||||||
|
_OSTREE_PUBLIC
|
||||||
|
void ostree_repo_finder_override_add_uri (OstreeRepoFinderOverride *self,
|
||||||
|
const gchar *uri);
|
||||||
|
|
||||||
|
G_END_DECLS
|
||||||
|
|
@ -40,6 +40,7 @@
|
||||||
#include <ostree-repo-finder-avahi.h>
|
#include <ostree-repo-finder-avahi.h>
|
||||||
#include <ostree-repo-finder-config.h>
|
#include <ostree-repo-finder-config.h>
|
||||||
#include <ostree-repo-finder-mount.h>
|
#include <ostree-repo-finder-mount.h>
|
||||||
|
#include <ostree-repo-finder-override.h>
|
||||||
#endif /* OSTREE_ENABLE_EXPERIMENTAL_API */
|
#endif /* OSTREE_ENABLE_EXPERIMENTAL_API */
|
||||||
|
|
||||||
#include <ostree-autocleanups.h>
|
#include <ostree-autocleanups.h>
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue