def test_should_raise_if_target_does_not_exist(base_steps):
"""
Test raises if target step does not exist
"""
with pytest.raises(MlVToolException) as ex:
get_dvc_dependencies(target_file_path='does_not_exit.dvc',
dvc_files=base_steps)
assert isinstance(ex.value.__cause__, IOError)
def test_should_raise_dvc_file_step_not_found(base_steps):
"""
Test raises if dvc file step not found
"""
base_steps.append('./does_not_exist_step.dvc')
with pytest.raises(MlVToolException) as ex:
get_dvc_dependencies(target_file_path=base_steps[0],
dvc_files=base_steps)
assert isinstance(ex.value.__cause__, IOError)
def test_should_raise_if_target_format_error(work_dir, base_steps):
"""
Test raises if target format error
"""
target = join(work_dir, 'format_error.dvc')
with open(target, 'wb') as fd:
fd.write(b'k:v:\n\t\t-')
with pytest.raises(MlVToolException) as ex:
get_dvc_dependencies(target_file_path=target, dvc_files=base_steps)
assert isinstance(ex.value.__cause__, YAMLError)
def test_should_get_dependencies_steps(base_steps):
"""
Test all steps to in denpendency of the target step
+-----------+ +---------------+
| step1.dvc | | isolated1.dvc |
+-----------+ +---------------+
*
+-----------+ +---------------+
| step2.dvc | | isolated2.dvc |
+-----------+ +---------------+
** **
+-----------+ +-----------+
| step3.dvc | | step4.dvc |
+-----------+ +-----------+
** **
+-----------+
| step5.dvc |
+-----------+
"""
dependencies = list(
get_dvc_dependencies(target_file_path=base_steps[-1],
dvc_files=base_steps))
# Topological sort solution can be 1 -> 2 -> 3 -> 4 -> 5
# or 1 -> 2 -> 4 -> 3 -> 5
expected_steps = ([basename(base_steps[idx]) for idx in (0, 1, 2, 3, 4)],
[basename(base_steps[idx]) for idx in (0, 1, 3, 2, 4)])
assert [d.name for d in dependencies] in expected_steps
def export_pipeline(dvc_meta_file: str, output: str, work_dir: str):
"""
Generate an executable script to run a whole pipeline
"""
logging.info(f'Export pipeline from step {dvc_meta_file} to {output}')
logging.debug(f'Work directory {work_dir}')
ordered_dvc_metas = get_dvc_dependencies(dvc_meta_file,
get_dvc_files(dvc_meta_file))
template_data = {
'work_dir': work_dir,
'cmds': [dvc_meta.cmd for dvc_meta in ordered_dvc_metas]
}
logging.debug(f'Template data: {template_data}')
template_path = join(CURRENT_DIR, '..', 'template',
PIPELINE_EXPORT_TEMPLATE_NAME)
write_template(output, template_path, info=template_data)
logging.log(logging.WARNING + 1,
f'Pipeline successfully exported in {abspath(output)}')
def test_should_remove_not_targeted_steps(work_dir, base_steps):
"""
Test get dependencies but does not include steps not directly in dependencies
+-----------+
| step1.dvc |
+-----------+**
* **********
+-----------+ +---------------+
| step2.dvc | | step2_bis.dvc |
+-----------+ +---------------+
** **
+-----------+ +-----------+
| step3.dvc | | step4.dvc |
+-----------+ +-----------+
** ** **
+-----------+ +-----------+
| step5.dvc | | step6.dvc |
+-----------+ +-----------+
"""
target_step = join(work_dir, 'step6.dvc')
base_steps += [join(work_dir, 'step2_bis.dvc'), target_step]
write_dvc_file(base_steps[-2],
'cmd2_bis',
deps=['./s1_out'],
outs=['./s2_bis_out'])
write_dvc_file(base_steps[-1],
'cmd6',
deps=['./s4_out'],
outs=['./s6_out'])
expected_steps = [base_steps[0], base_steps[1], base_steps[3], target_step]
dependencies = list(
get_dvc_dependencies(target_file_path=target_step,
dvc_files=base_steps))
# Topological solution is 1 -> 2 -> 4 -> 6
assert [d.name
for d in dependencies] == [basename(s) for s in expected_steps]
