feat: pull recursivelly to include subject references

Signed-off-by: Tomas Coufal <tcoufal@redhat.com>

Author: tumido

oras/provider.py

@@ -862,11 +862,13 @@ def pull(self, *args, **kwargs) -> List[str]:
         refresh_headers = kwargs.get("refresh_headers")
         if refresh_headers is None:
             refresh_headers = True
-        container = self.get_container(kwargs["target"])
+        target: str = kwargs["target"]
+        container = self.get_container(target)
         self.load_configs(container, configs=kwargs.get("config_path"))
         manifest = self.get_manifest(container, allowed_media_type, refresh_headers)
         outdir = kwargs.get("outdir") or oras.utils.get_tmpdir()
         overwrite = kwargs.get("overwrite", True)
+        include_subject = kwargs.get("include_subject", False)
 
         files = []
         for layer in manifest.get("layers", []):
@@ -900,6 +902,16 @@ def pull(self, *args, **kwargs) -> List[str]:
                 self.download_blob(container, layer["digest"], outfile)
             logger.info(f"Successfully pulled {outfile}.")
             files.append(outfile)
+
+        if include_subject and manifest.get('subject', False):
+            separator = "@" if "@" in target else ":"
+            repo, _tag = target.rsplit(separator, 1)
+            subject_digest = manifest['subject']['digest']
+            new_kwargs = kwargs
+            new_kwargs['target'] = f'{repo}@{subject_digest}'
+
+            files += self.pull(*args, **kwargs)
+
         return files
 
     @decorator.ensure_container

oras/tests/conftest.py

@@ -53,6 +53,11 @@ def target(registry):
     return f"{registry}/dinosaur/artifact:v1"
 
 
+@pytest.fixture
+def derived_target(registry):
+    return f"{registry}/dinosaur/artifact:v1-derived"
+
+
 @pytest.fixture
 def target_dir(registry):
     return f"{registry}/dinosaur/directory:v1"

oras/tests/derived-artifact.txt

@@ -0,0 +1 @@
+referred artifact is greeting extinct creatures

oras/tests/test_oras.py

@@ -8,6 +8,7 @@
 import pytest
 
 import oras.client
+import oras.provider
 
 here = os.path.abspath(os.path.dirname(__file__))
 
@@ -67,6 +68,40 @@ def test_basic_push_pull(tmp_path, registry, credentials, target):
     assert res.status_code == 201
 
 
+
+@pytest.mark.with_auth(False)
+def test_push_pull_attached_artifacts(tmp_path, registry, credentials, target, derived_target):
+    """
+    Basic tests for oras (without authentication)
+    """
+    client = oras.client.OrasClient(hostname=registry, insecure=True)
+
+    artifact = os.path.join(here, "artifact.txt")
+    assert os.path.exists(artifact)
+
+    res = client.push(files=[artifact], target=target)
+    assert res.status_code in [200, 201]
+
+    derived_artifact = os.path.join(here, "derived-artifact.txt")
+    assert os.path.exists(derived_artifact)
+
+    manifest = client.remote.get_manifest(target)
+    subject = oras.provider.Subject.from_manifest(manifest)
+    res = client.push(files=[derived_artifact], target=derived_target, subject=subject)
+    assert res.status_code in [200, 201]
+
+    # Test pulling elsewhere
+    files = sorted(client.pull(target=derived_target, outdir=tmp_path, include_subject=True))
+    assert len(files) == 2
+    assert os.path.basename(files[0]) == "artifact.txt"
+    assert os.path.basename(files[1]) == "derived-artifact.txt"
+    assert str(tmp_path) in files[0]
+    assert str(tmp_path) in files[1]
+    assert os.path.exists(files[0])
+    assert os.path.exists(files[1])
+
+
+
 @pytest.mark.with_auth(False)
 def test_get_delete_tags(tmp_path, registry, credentials, target):
     """
@@ -87,7 +122,7 @@ def test_get_delete_tags(tmp_path, registry, credentials, target):
     assert not client.delete_tags(target, "v1-boop-boop")
     assert "v1" in client.delete_tags(target, "v1")
     tags = client.get_tags(target)
-    assert not tags
+    assert "v1" not in tags
 
 
 def test_get_many_tags():