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oci: Add helpers to parse OCI delta index and manifest

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This commit is contained in:
Alexander Larsson
2020-05-07 13:13:25 +02:00
committed by Alexander Larsson
parent eaeb52b6a3
commit 3d8ca04565
2 changed files with 66 additions and 0 deletions
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11
common/flatpak-json-oci-private.h
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@@ -135,6 +135,12 @@ const char * flatpak_oci_manifest_get_layer_digest (FlatpakOciManifest *s
int i);
GHashTable * flatpak_oci_manifest_get_annotations (FlatpakOciManifest *self);
/* Only useful for delta manifest */
FlatpakOciDescriptor *flatpak_oci_manifest_find_delta_for (FlatpakOciManifest *deltamanifest,
const char *from_diffid,
const char *to_diffid);
#define FLATPAK_TYPE_OCI_INDEX flatpak_oci_index_get_type ()
G_DECLARE_FINAL_TYPE (FlatpakOciIndex, flatpak_oci_index, FLATPAK, OCI_INDEX, FlatpakOciVersioned)
@@ -162,6 +168,11 @@ FlatpakOciManifestDescriptor *flatpak_oci_index_get_manifest (FlatpakOciIndex *s
FlatpakOciManifestDescriptor *flatpak_oci_index_get_only_manifest (FlatpakOciIndex *self);
int flatpak_oci_index_get_n_manifests (FlatpakOciIndex *self);
/* Only useful for delta index */
FlatpakOciDescriptor *flatpak_oci_index_find_delta_for (FlatpakOciIndex *delta_index,
const char *for_digest);
#define FLATPAK_TYPE_OCI_IMAGE flatpak_oci_image_get_type ()
G_DECLARE_FINAL_TYPE (FlatpakOciImage, flatpak_oci_image, FLATPAK, OCI_IMAGE, FlatpakJson)

55
common/flatpak-json-oci.c
View File

@@ -375,6 +375,36 @@ flatpak_oci_manifest_get_annotations (FlatpakOciManifest *self)
return self->annotations;
}
FlatpakOciDescriptor *
flatpak_oci_manifest_find_delta_for (FlatpakOciManifest *delta_manifest,
const char *from_diffid,
const char *to_diffid)
{
int i;
if (from_diffid == NULL || to_diffid == NULL)
return NULL;
for (i = 0; delta_manifest->layers != NULL && delta_manifest->layers[i] != NULL; i++)
{
FlatpakOciDescriptor *layer = delta_manifest->layers[i];
const char *layer_from = NULL, *layer_to = NULL;
if (layer->annotations != NULL)
{
layer_from = g_hash_table_lookup (layer->annotations, "io.github.containers.delta.from");
layer_to = g_hash_table_lookup (layer->annotations, "io.github.containers.delta.to");
if (g_strcmp0 (layer_from, from_diffid) == 0 &&
g_strcmp0 (layer_to, to_diffid) == 0)
return layer;
}
}
return NULL;
}
G_DEFINE_TYPE (FlatpakOciIndex, flatpak_oci_index, FLATPAK_TYPE_OCI_VERSIONED);
static void
@@ -560,6 +590,31 @@ flatpak_oci_index_remove_manifest (FlatpakOciIndex *self,
return TRUE;
}
FlatpakOciDescriptor *
flatpak_oci_index_find_delta_for (FlatpakOciIndex *delta_index,
const char *for_digest)
{
int i;
if (delta_index->manifests == NULL)
return NULL;
for (i = 0; delta_index->manifests[i] != NULL; i++)
{
FlatpakOciManifestDescriptor *d = delta_index->manifests[i];
const char *target;
if (d->parent.annotations == NULL)
continue;
target = g_hash_table_lookup (d->parent.annotations, "io.github.containers.delta.target");
if (g_strcmp0 (target, for_digest) == 0)
return &d->parent;
}
return NULL;
}
G_DEFINE_TYPE (FlatpakOciImage, flatpak_oci_image, FLATPAK_TYPE_JSON);
static void