def load(self):
if not self.exists():
return {}
with self.repo.tree.open(self.path) as fd:
data = parse_yaml(fd.read(), self.path)
try:
self.validate(data, fname=self.relpath)
except StageFileFormatError:
raise LockfileCorruptedError(
f"Lockfile '{self.relpath}' is corrupted.")
return data
def _load(self):
# it raises the proper exceptions by priority:
# 1. when the file doesn't exists
# 2. filename is not a DVC-file
# 3. path doesn't represent a regular file
if not self.exists():
raise StageFileDoesNotExistError(self.path)
check_dvc_filename(self.path)
if not self.repo.tree.isfile(self.path):
raise StageFileIsNotDvcFileError(self.path)
with self.repo.tree.open(self.path) as fd:
stage_text = fd.read()
d = parse_yaml(stage_text, self.path)
self.validate(d, self.relpath)
return d, stage_text
def test_cyclic_graph_error(tmp_dir, dvc, run_copy):
tmp_dir.gen("foo", "foo")
run_copy("foo", "bar", name="copy-foo-bar")
run_copy("bar", "baz", name="copy-bar-baz")
run_copy("baz", "foobar", name="copy-baz-foobar")
with open(PIPELINE_FILE) as f:
data = parse_yaml(f.read(), PIPELINE_FILE)
data["stages"]["copy-baz-foo"] = {
"cmd": "echo baz > foo",
"deps": ["baz"],
"outs": ["foo"],
}
dump_yaml(PIPELINE_FILE, data)
with pytest.raises(CyclicGraphError):
dvc.reproduce(":copy-baz-foo")