def construct_scaffolded_file_contents(module_name, pipeline_name, environment_dict):
printer = IndentingStringIoPrinter(indent_level=4)
printer.line('\'\'\'')
printer.line(
'The airflow DAG scaffold for {module_name}.{pipeline_name}'.format(
module_name=module_name, pipeline_name=pipeline_name
)
)
printer.blank_line()
printer.line('Note that this docstring must contain the strings "airflow" and "DAG" for')
printer.line('Airflow to properly detect it as a DAG')
printer.line('See: http://bit.ly/307VMum')
printer.line('\'\'\'')
printer.line('import datetime')
printer.line('import yaml')
printer.blank_line()
printer.line('from dagster_airflow.factory import make_airflow_dag')
printer.blank_line()
printer.blank_line()
printer.line('ENVIRONMENT = \'\'\'')
printer.line(yaml.dump(environment_dict, default_flow_style=False))
printer.line('\'\'\'')
printer.blank_line()
printer.blank_line()
printer.comment('NOTE: these arguments should be edited for your environment')
printer.line('DEFAULT_ARGS = {')
with printer.with_indent():
printer.line("'owner': 'airflow',")
printer.line("'depends_on_past': False,")
printer.line("'start_date': datetime.datetime(2019, 5, 7),")
printer.line("'email': ['*****@*****.**'],")
printer.line("'email_on_failure': False,")
printer.line("'email_on_retry': False,")
printer.line('}')
printer.blank_line()
printer.line('dag, tasks = make_airflow_dag(')
with printer.with_indent():
printer.comment(
'NOTE: you must ensure that {module_name} is installed or available on sys.path, '
'otherwise, this import will fail.'.format(module_name=module_name)
)
printer.line('module_name=\'{module_name}\','.format(module_name=module_name))
printer.line('pipeline_name=\'{pipeline_name}\','.format(pipeline_name=pipeline_name))
printer.line("environment_dict=yaml.load(ENVIRONMENT),")
printer.line("dag_kwargs={'default_args': DEFAULT_ARGS, 'max_active_runs': 1}")
printer.line(')')
return printer.read().encode()
def construct_scaffolded_file_contents(module_name, job_name, run_config):
yesterday = datetime.now() - timedelta(1)
printer = IndentingStringIoPrinter(indent_level=4)
printer.line("'''")
printer.line(
"The airflow DAG scaffold for {module_name}.{job_name}".format(
module_name=module_name, job_name=job_name))
printer.blank_line()
printer.line(
'Note that this docstring must contain the strings "airflow" and "DAG" for'
)
printer.line("Airflow to properly detect it as a DAG")
printer.line("See: http://bit.ly/307VMum")
printer.line("'''")
printer.line("import datetime")
printer.blank_line()
printer.line("import yaml")
printer.line("from dagster_airflow.factory import make_airflow_dag")
printer.blank_line()
printer.line("#" * 80)
printer.comment("#")
printer.comment(
"# This environment is auto-generated from your configs and/or presets"
)
printer.comment("#")
printer.line("#" * 80)
printer.line("ENVIRONMENT = '''")
printer.line(yaml.dump(run_config, default_flow_style=False))
printer.line("'''")
printer.blank_line()
printer.blank_line()
printer.line("#" * 80)
printer.comment("#")
printer.comment(
"# NOTE: these arguments should be edited for your environment")
printer.comment("#")
printer.line("#" * 80)
printer.line("DEFAULT_ARGS = {")
with printer.with_indent():
printer.line("'owner': 'airflow',")
printer.line("'depends_on_past': False,")
# start date -> yesterday
printer.line("'start_date': datetime.datetime(%s, %d, %d)," %
(yesterday.year, yesterday.month, yesterday.day))
printer.line("'email': ['*****@*****.**'],")
printer.line("'email_on_failure': False,")
printer.line("'email_on_retry': False,")
printer.line("}")
printer.blank_line()
printer.line("dag, tasks = make_airflow_dag(")
with printer.with_indent():
printer.comment(f"NOTE: you must ensure that {module_name} is ")
printer.comment(
"installed or available on sys.path, otherwise, this import will fail."
)
printer.line(f"module_name='{module_name}',")
printer.line(f"job_name='{job_name}',")
printer.line("run_config=yaml.safe_load(ENVIRONMENT),")
printer.line(
"dag_kwargs={'default_args': DEFAULT_ARGS, 'max_active_runs': 1}")
printer.line(")")
return printer.read().encode("utf-8")
def scaffold(dag_name, module_name, pipeline_name, output_path, environment_file):
'''Creates a DAG file for a specified dagster pipeline'''
# Validate output path
if not output_path:
raise Exception('You must specify --output-path or set AIRFLOW_HOME to use this script.')
# We construct the YAML environment and then put it directly in the DAG file
environment_yaml = _construct_yml(environment_file, dag_name)
printer = IndentingStringIoPrinter(indent_level=4)
printer.line('\'\'\'')
printer.line(
'The airflow DAG scaffold for {module_name}.{pipeline_name}'.format(
module_name=module_name, pipeline_name=pipeline_name
)
)
printer.blank_line()
printer.line('Note that this docstring must contain the strings "airflow" and "DAG" for')
printer.line('Airflow to properly detect it as a DAG')
printer.line('See: http://bit.ly/307VMum')
printer.line('\'\'\'')
printer.line('import datetime')
printer.line('import yaml')
printer.blank_line()
printer.line('from dagster_airflow.factory import make_airflow_dag')
printer.blank_line()
printer.blank_line()
printer.line('ENVIRONMENT = \'\'\'')
printer.line(environment_yaml)
printer.line('\'\'\'')
printer.blank_line()
printer.blank_line()
printer.comment('NOTE: these arguments should be edited for your environment')
printer.line('DEFAULT_ARGS = {')
with printer.with_indent():
printer.line("'owner': 'airflow',")
printer.line("'depends_on_past': False,")
printer.line("'start_date': datetime.datetime(2019, 5, 7),")
printer.line("'email': ['*****@*****.**'],")
printer.line("'email_on_failure': False,")
printer.line("'email_on_retry': False,")
printer.line('}')
printer.blank_line()
printer.line('dag, tasks = make_airflow_dag(')
with printer.with_indent():
printer.comment(
'NOTE: you must ensure that {module_name} is installed or available on sys.path, '
'otherwise, this import will fail.'.format(module_name=module_name)
)
printer.line('module_name=\'{module_name}\','.format(module_name=module_name))
printer.line('pipeline_name=\'{pipeline_name}\','.format(pipeline_name=pipeline_name))
printer.line("environment_dict=yaml.load(ENVIRONMENT),")
printer.line("dag_kwargs={'default_args': DEFAULT_ARGS, 'max_active_runs': 1}")
printer.line(')')
# Ensure output_path/dags exists
dags_path = os.path.join(output_path, 'dags')
if not os.path.isdir(dags_path):
os.makedirs(dags_path)
dag_file = os.path.join(output_path, 'dags', dag_name + '.py')
with open(dag_file, 'wb') as f:
f.write(printer.read().encode())