mirror of
https://github.com/norandom/OpenUltraSAST.git
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448 lines
21 KiB
Python
448 lines
21 KiB
Python
"""Exercise the snapshot resolver with real local Git objects, not mocked answers."""
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import subprocess
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from pathlib import Path
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import pytest
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from openultrasast.push.snapshot import SnapshotAdapter
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def git(repo: Path, *args: str, input: str | None = None) -> str:
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result = subprocess.run(["git", "-C", str(repo), *args], input=input, text=True, capture_output=True, check=True)
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return result.stdout.strip()
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@pytest.fixture(params=["sha1", "sha256"])
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def repo(tmp_path: Path, request: pytest.FixtureRequest) -> Path:
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git(tmp_path, "init", "--object-format=" + request.param)
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git(tmp_path, "config", "user.name", "Fixture")
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git(tmp_path, "config", "user.email", "[email protected]")
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return tmp_path
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def commit(repo: Path, label: str, *parents: str) -> str:
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blob = git(repo, "hash-object", "-w", "--stdin", input=label)
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assert git(repo, "cat-file", "-s", blob) == str(len(label))
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tree = git(repo, "mktree", input=f"100644 blob {blob}\tfile.js\n")
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args = ["commit-tree", tree]
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for parent in parents:
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args.extend(["-p", parent])
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return git(repo, *args, input=label)
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def line(head: str, base: str, name: str = "main") -> str:
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return f"refs/heads/{name} {head} refs/heads/{name} {base}\n"
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def test_preserves_every_ref_and_distinct_comparisons(repo: Path) -> None:
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base = commit(repo, "base")
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other = commit(repo, "other", base)
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head = commit(repo, "head", base)
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result = SnapshotAdapter(repo).resolve_updates(line(head, base) + line(head, other, "force") + line(head, base, "alias"))
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assert result.targets == (head,)
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assert [(c.head_oid, c.base_oid, c.refs) for c in result.comparisons] == [
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(head, base, ("refs/heads/main", "refs/heads/alias")), (head, other, ("refs/heads/force",))]
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assert [r.disposition for r in result.updates] == ["ready"] * 3
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assert len(result.updates) == 3
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def test_configured_new_branch_uses_unique_merge_base(repo: Path) -> None:
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base = commit(repo, "base")
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left, right = commit(repo, "left", base), commit(repo, "right", base)
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git(repo, "update-ref", "refs/heads/baseline", right)
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merge = commit(repo, "merge", left, right)
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result = SnapshotAdapter(repo, comparison_base="refs/heads/baseline").resolve_updates(line(merge, "0" * len(base)))
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assert result.comparisons[0].base_oid == right
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assert result.comparisons[0].head_oid == merge
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assert result.updates[0].base_reason == "configured_unique_merge_base:" + right
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assert result.updates[0].disposition == "ready"
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def test_no_implicit_head_or_fetch_for_missing_base(repo: Path) -> None:
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head = commit(repo, "head")
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git(repo, "update-ref", "HEAD", head)
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for configured in (None, "refs/remotes/origin/absent"):
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result = SnapshotAdapter(repo, comparison_base=configured).resolve_updates(line(head, "0" * len(head)))
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assert result.updates[0].disposition == "missing_base"
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assert result.comparisons[0].base_oid is None
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result = SnapshotAdapter(repo).resolve_updates(line(head, "1" * len(head)))
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assert result.updates[0].disposition == "missing_base"
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assert result.comparisons[0].base_reason == "supplied_remote_tip"
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def test_unrelated_and_ambiguous_new_branch_bases(repo: Path) -> None:
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root = commit(repo, "root")
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unrelated = commit(repo, "unrelated")
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result = SnapshotAdapter(repo, comparison_base=unrelated).resolve_updates(line(root, "0" * len(root)))
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assert result.updates[0].disposition == "no_merge_base"
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left, right = commit(repo, "left", root), commit(repo, "right", root)
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one, two = commit(repo, "one", left, right), commit(repo, "two", right, left)
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result = SnapshotAdapter(repo, comparison_base=one).resolve_updates(line(two, "0" * len(root)))
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assert result.updates[0].disposition == "ambiguous_base"
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assert result.comparisons[0].base_oid is None
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def test_tags_peel_to_commit_and_retain_input_identity(repo: Path) -> None:
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base, head = commit(repo, "base"), commit(repo, "head")
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git(repo, "tag", "-a", "old", base, "-m", "old")
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git(repo, "tag", "-a", "new", head, "-m", "new")
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old_tag, new_tag = git(repo, "rev-parse", "old"), git(repo, "rev-parse", "new")
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data = f"refs/tags/new {new_tag} refs/tags/new {old_tag}\n" + line(head, base)
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result = SnapshotAdapter(repo).resolve_updates(data)
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assert result.targets == (head,)
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assert result.comparisons[0].base_oid == base
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assert result.comparisons[0].refs == ("refs/tags/new", "refs/heads/main")
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assert result.updates[0].update.local_oid == new_tag
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assert result.updates[0].update.remote_oid == old_tag
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assert type(result).from_payload(result.to_payload()) == result
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def test_deletion_only_has_no_analysis(repo: Path) -> None:
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old = commit(repo, "old")
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result = SnapshotAdapter(repo).resolve_updates(f"(delete) {'0' * len(old)} refs/heads/old {old}\n")
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assert result.targets == result.comparisons == ()
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assert result.updates[0].disposition == "deleted"
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assert SnapshotAdapter(repo).resolve_updates("").updates == ()
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def test_missing_and_unsupported_objects_are_explicit(repo: Path) -> None:
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head = commit(repo, "head")
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blob = git(repo, "hash-object", "-w", "--stdin", input="unsupported source")
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git(repo, "tag", "-a", "blob-tag", blob, "-m", "unsupported")
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tag = git(repo, "rev-parse", "blob-tag")
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result = SnapshotAdapter(repo).resolve_updates(line("1" * len(head), head) + line(blob, head, "blob") + line(tag, head, "tag"))
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assert [r.disposition for r in result.updates] == ["missing_target", "unsupported_target", "unsupported_target"]
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assert result.targets == result.comparisons == ()
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result = SnapshotAdapter(repo).resolve_updates(line(head, blob))
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assert result.updates[0].disposition == "unsupported_base"
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def test_bad_protocol_never_silently_skips_lines(repo: Path) -> None:
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from openultrasast.push.snapshot import SnapshotInputError
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head = commit(repo, "head")
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for invalid in ("\n", "only three fields\n", line(head[:-1], head), line(head, head, "bad..ref"),
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line("0" * len(head), head), f"(delete) {head} refs/heads/main {head}\n"):
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with pytest.raises(SnapshotInputError):
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SnapshotAdapter(repo).resolve_updates(line(head, head) + invalid)
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def test_replacements_and_inherited_git_environment_do_not_change_identity(repo: Path, monkeypatch: pytest.MonkeyPatch) -> None:
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root = commit(repo, "root")
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original = commit(repo, "original", root)
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replacement = commit(repo, "replacement")
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git(repo, "replace", original, replacement)
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monkeypatch.setenv("GIT_DIR", str(repo / "nonexistent"))
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monkeypatch.setenv("GIT_OBJECT_DIRECTORY", str(repo / "nonexistent"))
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result = SnapshotAdapter(repo, comparison_base=root).resolve_updates(line(original, "0" * len(root)))
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assert result.updates[0].disposition == "ready"
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assert result.comparisons[0].base_oid == root
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assert result.comparisons[0].head_oid == original
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def test_missing_promisor_object_cannot_fetch_even_when_repo_allows_file(repo: Path, tmp_path: Path) -> None:
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source = repo / "source"
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source.mkdir()
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fmt = git(repo, "rev-parse", "--show-object-format")
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git(source, "init", "--object-format=" + fmt)
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git(source, "config", "user.name", "Fixture")
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git(source, "config", "user.email", "[email protected]")
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missing = commit(source, "must not fetch")
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git(source, "update-ref", "refs/heads/main", missing)
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git(repo, "config", "remote.origin.url", str(source))
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git(repo, "config", "remote.origin.promisor", "true")
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git(repo, "config", "remote.origin.partialclonefilter", "blob:none")
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git(repo, "config", "protocol.file.allow", "always")
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before = sorted(p.relative_to(repo / ".git/objects") for p in (repo / ".git/objects").rglob("*") if p.is_file())
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result = SnapshotAdapter(repo).resolve_updates(line(missing, "0" * len(missing)))
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after = sorted(p.relative_to(repo / ".git/objects") for p in (repo / ".git/objects").rglob("*") if p.is_file())
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assert result.updates[0].disposition == "missing_target"
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assert before == after
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def test_missing_tag_referent_is_missing_not_unsupported(repo: Path) -> None:
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head = commit(repo, "head")
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git(repo, "tag", "-a", "dangling", head, "-m", "dangling")
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tag = git(repo, "rev-parse", "dangling")
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(repo / ".git" / "objects" / head[:2] / head[2:]).unlink()
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result = SnapshotAdapter(repo).resolve_updates(f"refs/tags/dangling {tag} refs/tags/dangling {'0' * len(head)}\n")
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assert result.updates[0].disposition == "missing_target"
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def test_legacy_grafts_cannot_rewrite_comparison_ancestry(repo: Path) -> None:
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root = commit(repo, "root")
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head = commit(repo, "head", root)
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(repo / ".git/info/grafts").write_text(head + "\n")
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result = SnapshotAdapter(repo, comparison_base=root).resolve_updates(line(head, "0" * len(head)))
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assert result.comparisons[0].base_oid == root
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def test_dirty_non_head_and_duplicate_update_records_are_preserved(repo: Path) -> None:
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base = commit(repo, "base")
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pushed = commit(repo, "pushed", base)
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checked = commit(repo, "checked", base)
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git(repo, "update-ref", "HEAD", checked)
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(repo / "file.js").write_text("dirty file")
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git(repo, "add", "file.js")
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before_index = (repo / ".git/index").read_bytes()
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result = SnapshotAdapter(repo).resolve_updates(line(pushed, base) * 2)
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assert result.targets == (pushed,)
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assert len(result.updates) == 2
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assert len(result.comparisons) == 1
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assert (repo / ".git/index").read_bytes() == before_index
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assert (repo / "file.js").read_text() == "dirty file"
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assert git(repo, "rev-parse", "HEAD") == checked
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@pytest.mark.parametrize("name", ["unicode\u00a0inside", "unicode-trailing\u00a0", "unicode\u2028separator"])
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def test_git_valid_unicode_ref_names_are_preserved(repo: Path, name: str) -> None:
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base = commit(repo, "base")
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head = commit(repo, "head", base)
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ref = "refs/heads/" + name
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git(repo, "check-ref-format", ref)
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git(repo, "update-ref", ref, head)
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result = SnapshotAdapter(repo).resolve_updates(line(head, base, name))
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assert result.updates[0].update.local_ref == ref
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assert result.updates[0].update.remote_ref == ref
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assert result.comparisons[0].refs == (ref,)
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assert result.updates[0].disposition == "ready"
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def test_materialize_reads_non_head_objects_and_cleans(repo: Path, tmp_path: Path) -> None:
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pushed = commit(repo, "<?php echo $_GET['x'];")
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checked = commit(repo, "dirty baseline")
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git(repo, "update-ref", "HEAD", checked)
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(repo / "file.js").write_bytes(b"staged")
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git(repo, "add", "file.js")
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(repo / "file.js").write_bytes(b"dirty")
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before = (repo / ".git/index").read_bytes()
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with SnapshotAdapter(repo).materialize(pushed) as snapshot:
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root = snapshot.root
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assert (root / "file.js").read_bytes() == b"<?php echo $_GET['x'];"
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assert snapshot.manifest.complete
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assert snapshot.manifest.bytes_read == 22
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assert snapshot.manifest.commit_oid == pushed
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assert not root.exists()
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assert (repo / ".git/index").read_bytes() == before
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assert (repo / "file.js").read_bytes() == b"dirty"
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assert git(repo, "rev-parse", "HEAD") == checked
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def binary_commit(repo: Path, entries: list[tuple[bytes, bytes, bytes]]) -> str:
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records = []
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for mode, path, data in entries:
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if mode == b"160000":
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oid = data
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kind = b"commit"
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else:
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oid = subprocess.run(["git", "-C", str(repo), "hash-object", "-w", "--stdin"],
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input=data, capture_output=True, check=True).stdout.rstrip(b"\n")
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kind = b"blob"
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assert int(git(repo, "cat-file", "-s", oid.decode())) == len(data)
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records.append(mode + b" " + kind + b" " + oid + b"\t" + path + b"\0")
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tree = subprocess.run(["git", "-C", str(repo), "mktree", "-z"], input=b"".join(records),
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capture_output=True, check=True).stdout.decode().strip()
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return git(repo, "commit-tree", tree, input="binary fixture")
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def test_snapshot_exact_binary_paths_and_no_filters(repo: Path) -> None:
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import os
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entries = [(b"100644", path, data) for path, data in [
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(b"handler.php", b"<?php echo $_GET['x'];\n"),
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(b"api.js", b"app.post('/x', (req,res)=>res.send(req.body.x));\n"),
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(b"newline\nname\t.js", b"\x00\xffbinary\r\n"), ("\u03b1.js".encode(), b"unicode"),
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(b"\xff.js", b"invalid UTF8 name"), (b" ", b"space"),
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(b".gitattributes", b"* filter=trap\n"),
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]]
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oid = binary_commit(repo, entries)
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sentinel = repo / "FILTER_RAN"
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git(repo, "config", "filter.trap.smudge", "touch " + str(sentinel))
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with SnapshotAdapter(repo).materialize(oid) as snapshot:
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assert snapshot.manifest.complete
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assert snapshot.manifest.bytes_read == sum(len(data) for _, _, data in entries)
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assert {f.path_bytes for f in snapshot.manifest.files} == {path for _, path, _ in entries}
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for _, path, data in entries:
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assert (snapshot.root / os.fsdecode(path)).read_bytes() == data
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assert type(snapshot.manifest).from_payload(snapshot.manifest.to_payload()) == snapshot.manifest
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assert not sentinel.exists()
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def test_snapshot_omits_symlinks_gitlinks_and_lfs(repo: Path) -> None:
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target = commit(repo, "submodule")
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oid = binary_commit(repo, [
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(b"120000", b"outside", b"/etc/passwd"),
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(b"160000", b"submodule", target.encode()),
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(b"100644", b"large.js", b"version https://git-lfs.github.com/spec/v1\noid sha256:" + b"0" * 64 + b"\nsize 3\n"),
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])
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with SnapshotAdapter(repo).materialize(oid) as snapshot:
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assert not snapshot.manifest.complete
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assert snapshot.manifest.tree_complete
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assert {b.reason for b in snapshot.manifest.boundaries} == {
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"symlink_not_materialized", "gitlink_not_materialized", "lfs_content_unavailable"}
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assert list(snapshot.root.iterdir()) == []
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@pytest.mark.parametrize("limit,reason", [("max_files", "file_count_limit"),
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("max_tree_bytes", "git_output_limit"), ("max_blob_bytes", "source_byte_limit"),
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("max_total_bytes", "source_byte_limit"), ("max_path_bytes", "unsupported_path")])
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def test_snapshot_limits_are_explicit(repo: Path, limit: str, reason: str) -> None:
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from openultrasast.push.snapshot import SnapshotLimits
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oid = binary_commit(repo, [(b"100644", b"one.js", b"123"), (b"100644", b"two.php", b"456")])
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with SnapshotAdapter(repo).materialize(oid, limits=SnapshotLimits(**{limit: 1})) as snapshot:
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root = snapshot.root
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assert not snapshot.manifest.complete
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assert reason in {b.reason for b in snapshot.manifest.boundaries}
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assert snapshot.manifest.bytes_read <= 1 if limit == "max_total_bytes" else True
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assert not root.exists()
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@pytest.mark.parametrize("failure", ["cancel", "deadline", "missing_blob", "consumer"])
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def test_snapshot_failure_preserves_live_state_and_cleans(repo: Path, failure: str) -> None:
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import time
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from openultrasast.model.contracts import ExecutionBudget
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from openultrasast.push.snapshot import SnapshotInputError
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oid = commit(repo, "object bytes")
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git(repo, "update-ref", "HEAD", oid)
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(repo / "file.js").write_bytes(b"staged")
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git(repo, "add", "file.js")
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(repo / "file.js").write_bytes(b"dirty")
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hooks = repo / ".git/hooks/pre-push"
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hooks.write_bytes(b"existing hook")
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if failure == "missing_blob":
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blob = git(repo, "rev-parse", oid + ":file.js")
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(repo / ".git/objects" / blob[:2] / blob[2:]).unlink()
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before = {p.relative_to(repo): p.read_bytes() for p in repo.rglob("*") if p.is_file()}
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calls = 0
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def cancel() -> bool:
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nonlocal calls
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calls += 1
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return failure == "cancel" and calls >= 5
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budget = ExecutionBudget(time.monotonic() + (-1 if failure == "deadline" else 10), 2.0)
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root = None
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try:
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with SnapshotAdapter(repo).materialize(oid, budget=budget, cancelled=cancel) as snapshot:
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root = snapshot.root
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if failure == "consumer":
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raise RuntimeError("consumer cancelled")
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assert not snapshot.manifest.complete
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assert snapshot.manifest.boundaries
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except RuntimeError:
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assert failure == "consumer"
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except SnapshotInputError as error:
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assert failure == "deadline" and str(error) == "deadline_exhausted"
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assert (root is None and failure == "deadline") or (root is not None and not root.exists())
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after = {p.relative_to(repo): p.read_bytes() for p in repo.rglob("*") if p.is_file()}
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assert before == after
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def test_snapshot_rejects_live_scratch_parent(repo: Path) -> None:
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from openultrasast.push.snapshot import SnapshotInputError
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oid = commit(repo, "input")
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for parent in (repo, repo / ".git", repo / ".git/objects"):
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with pytest.raises(SnapshotInputError, match="outside"), SnapshotAdapter(repo).materialize(oid, scratch_parent=parent):
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pytest.fail("unsafe scratch accepted")
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def test_snapshot_missing_tree_and_unsupported_object_are_not_clean(repo: Path) -> None:
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oid = commit(repo, "input")
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blob = git(repo, "rev-parse", oid + ":file.js")
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with SnapshotAdapter(repo).materialize(blob) as snapshot:
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assert not snapshot.manifest.complete
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assert not snapshot.manifest.tree_complete
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tree = git(repo, "rev-parse", oid + "^{tree}")
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(repo / ".git/objects" / tree[:2] / tree[2:]).unlink()
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with SnapshotAdapter(repo).materialize(oid) as snapshot:
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assert not snapshot.manifest.complete
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assert not snapshot.manifest.tree_complete
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assert not snapshot.manifest.files
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def test_snapshot_refuses_oversize_blob_before_reading_it(repo: Path, monkeypatch: pytest.MonkeyPatch) -> None:
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from openultrasast.push.snapshot import SnapshotLimits
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oid = commit(repo, "large payload")
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adapter = SnapshotAdapter(repo)
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original = adapter._bounded_git
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commands = []
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def capture(args, *rest):
|
|
commands.append(args)
|
|
return original(args, *rest)
|
|
monkeypatch.setattr(adapter, "_bounded_git", capture)
|
|
with adapter.materialize(oid, limits=SnapshotLimits(max_blob_bytes=1)) as snapshot:
|
|
assert not snapshot.manifest.complete
|
|
assert not any(args[:2] == ("cat-file", "blob") for args in commands)
|
|
|
|
|
|
def test_cleanup_does_not_follow_consumer_symlinks(repo: Path, tmp_path_factory: pytest.TempPathFactory) -> None:
|
|
outside = tmp_path_factory.mktemp("outside")
|
|
(outside / "keep").write_bytes(b"preserve")
|
|
oid = commit(repo, "source")
|
|
with SnapshotAdapter(repo).materialize(oid) as snapshot:
|
|
(snapshot.root / "external").symlink_to(outside, target_is_directory=True)
|
|
assert (outside / "keep").read_bytes() == b"preserve"
|
|
with SnapshotAdapter(repo).materialize(oid) as snapshot:
|
|
(snapshot.root / "file.js").unlink()
|
|
snapshot.root.rmdir()
|
|
snapshot.root.symlink_to(outside, target_is_directory=True)
|
|
assert (outside / "keep").read_bytes() == b"preserve"
|
|
assert not snapshot.root.exists()
|
|
|
|
|
|
def test_snapshot_deadline_kills_slow_git_and_cleans(repo: Path, monkeypatch: pytest.MonkeyPatch) -> None:
|
|
import sys
|
|
import time
|
|
|
|
from openultrasast.model.contracts import ExecutionBudget
|
|
oid = commit(repo, "input")
|
|
adapter = SnapshotAdapter(repo)
|
|
real_popen = subprocess.Popen
|
|
processes = []
|
|
def slow_git(command, **kwargs):
|
|
process = real_popen([sys.executable, "-c", "import time; time.sleep(30)"], **kwargs)
|
|
processes.append(process)
|
|
return process
|
|
monkeypatch.setattr(subprocess, "Popen", slow_git)
|
|
start = time.monotonic()
|
|
with adapter.materialize(oid, budget=ExecutionBudget(start + 0.1, 1.0)) as snapshot:
|
|
assert {b.reason for b in snapshot.manifest.boundaries} == {"deadline_exhausted"}
|
|
assert not snapshot.manifest.complete
|
|
assert time.monotonic() - start < 1.5
|
|
assert processes and all(process.poll() is not None for process in processes)
|
|
assert not snapshot.root.exists()
|
|
|
|
|
|
def test_snapshot_manifest_rejects_forged_census(repo: Path) -> None:
|
|
from dataclasses import replace
|
|
oid = commit(repo, "input")
|
|
with SnapshotAdapter(repo).materialize(oid) as snapshot:
|
|
manifest = snapshot.manifest
|
|
file = manifest.files[0]
|
|
for changes in ({"bytes_read": -1}, {"files": (file, file)}, {"tree_complete": False}):
|
|
with pytest.raises(ValueError):
|
|
replace(manifest, **changes)
|
|
for changes in ({"path_hex": "zz"}, {"size_bytes": -1}, {"sha256": "bad"}, {"path_hex": "00"}):
|
|
with pytest.raises(ValueError):
|
|
replace(file, **changes)
|
|
|
|
|
|
def test_snapshot_subdirectory_adapter_cannot_scratch_in_live_parent(repo: Path) -> None:
|
|
from openultrasast.push.snapshot import SnapshotInputError
|
|
oid = commit(repo, "input")
|
|
nested = repo / "nested"
|
|
nested.mkdir()
|
|
with pytest.raises(SnapshotInputError, match="outside"), SnapshotAdapter(nested).materialize(oid, scratch_parent=repo):
|
|
pytest.fail("live parent accepted")
|
|
|
|
|
|
def test_snapshot_write_failure_cleans_partial_scratch(repo: Path, monkeypatch: pytest.MonkeyPatch) -> None:
|
|
oid = commit(repo, "input")
|
|
original = Path.open
|
|
def broken(path, mode="r", *args, **kwargs):
|
|
if mode == "xb":
|
|
raise OSError("scratch_write_failed")
|
|
return original(path, mode, *args, **kwargs)
|
|
monkeypatch.setattr(Path, "open", broken)
|
|
with SnapshotAdapter(repo).materialize(oid) as snapshot:
|
|
assert not snapshot.manifest.complete
|
|
assert any(b.reason == "scratch_write_failed" for b in snapshot.manifest.boundaries)
|
|
assert not snapshot.root.exists()
|