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Fetch app bundle index #389

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Merged
mike-sul merged 2 commits into from
May 28, 2025
Merged

Fetch app bundle index #389

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b8a6992
apps: Preserve app image digest
mike-sul May 28, 2025
26b74d1
apps: Fetch app bundle index
mike-sul May 28, 2025
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13 changes: 11 additions & 2 deletions apps/target_apps_fetcher.py
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Original file line number Diff line number Diff line change
Expand Up @@ -143,6 +143,14 @@ def _fetch_apps(self, target, apps_shortlist=None, force=False):
with tarfile.open(fileobj=BIO(app_blob)) as t:
t.extract('docker-compose.yml', app_dir)

if 'annotations' in manifest['layers'][0] and \
'org.foundries.app.bundle.index.digest' in manifest['layers'][0]['annotations']:
app_index_digest = manifest['layers'][0]['annotations']['org.foundries.app.bundle.index.digest']
app_index_hash = app_index_digest[len('sha256:'):]
app_index = self._registry_client.pull_layer(uri, app_index_digest)
with open(os.path.join(blobs_dir, app_index_hash), 'wb') as f:
f.write(app_index)

# Download and store the layers' manifest that contains a list of all layers that app's images are based on.
# It's needed for aklite to calculate an update size in an offline update case.
for lm in manifest.get('manifests', []):
Expand Down Expand Up @@ -183,8 +191,9 @@ def fetch_image(self, target_name: str, arch: str, image: str, dst_root_dir: str
image_dir = os.path.join(dst_root_dir, uri.host, uri.name, uri.hash)
os.makedirs(image_dir, exist_ok=True)
subprocess.check_call(['skopeo', '--insecure-policy', '--override-arch', arch, 'copy',
'--retry-times', '3', '--format', 'v2s2', '--dest-shared-blob-dir',
self.blobs_dir(target_name), 'docker://' + image, 'oci:' + image_dir])
'--preserve-digests', '--retry-times', '3', '--format', 'v2s2',
'--dest-shared-blob-dir', self.blobs_dir(target_name),
'docker://' + image, 'oci:' + image_dir])

# Store the image manifest in the blob directory, as result it contains all blobs/nodes of
# the app's merkle tree. It allows to check app integrity on devices with preloaded apps and
Expand Down