Source code for renku.core.models.cwl.parameter

# -*- coding: utf-8 -*-
# Copyright 2018-2019 - Swiss Data Science Center (SDSC)
# A partnership between École Polytechnique Fédérale de Lausanne (EPFL) and
# Eidgenössische Technische Hochschule Zürich (ETHZ).
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# See the License for the specific language governing permissions and
# limitations under the License.
"""Represent parameters from the Common Workflow Language."""

import attr

from .ascwl import CWLClass

[docs]def convert_default(value): """Convert a default value.""" if isinstance(value, dict): return CWLClass.from_cwl(value) return value
@attr.s class _IdMixin(object): """Define id field.""" id = attr.ib(default=None)
[docs]@attr.s class Parameter(object): """Define an input or output parameter to a process.""" streamable = attr.ib(default=None, converter=bool)
[docs]@attr.s class InputParameter(_IdMixin, Parameter): """An input parameter.""" type = attr.ib(default='string') description = attr.ib(default=None) default = attr.ib(default=None, converter=convert_default) inputBinding = attr.ib(default=None)
[docs]@attr.s class CommandLineBinding(object): """Define the binding behavior when building the command line.""" position = attr.ib(default=None) # int prefix = attr.ib(default=None) # int separate = attr.ib(default=True, type=bool) itemSeparator = attr.ib(default=None) # str valueFrom = attr.ib(default=None) # str | Expression shellQuote = attr.ib(default=True, type=bool)
[docs] def to_argv(self, default=None): """Format command line binding as shell argument.""" if self.valueFrom is not None: if self.valueFrom.startswith('$('): raise NotImplementedError() value = self.valueFrom else: value = default def _convert(value): """Convert value to a argument list.""" if self.prefix: if self.separate: return [self.prefix, str(value)] else: return [self.prefix + str(value)] else: return [str(value)] if self.prefix is None and not self.separate: raise ValueError('Can not separate an empty prefix.') if isinstance(value, list): if self.itemSeparator and value: value = self.itemSeparator.join([str(v) for v in value]) elif value: return [a for v in value for a in _convert(v)] elif (value is True or value is None) and self.prefix: return [self.prefix] elif value is False or value is None or ( value is True and not self.prefix ): return [] return _convert(value)
[docs]@attr.s class CommandInputParameter(InputParameter): """An input parameter for a CommandLineTool.""" inputBinding = attr.ib( default=None, converter=lambda data: CommandLineBinding(**data) if not isinstance( data, CommandLineBinding ) and data is not None else data, )
[docs] @classmethod def from_cwl(cls, data): """Create instance from type definition.""" if not isinstance(data, dict): data = {'type': data} return cls(**data)
[docs] def to_argv(self, **kwargs): """Format command input parameter as shell argument.""" return self.inputBinding.to_argv(default=self.default, ** kwargs) if self.inputBinding else []
[docs]@attr.s class OutputParameter(_IdMixin, Parameter): """An output parameter.""" type = attr.ib(default='string') description = attr.ib(default=None) format = attr.ib(default=None) outputBinding = attr.ib(default=None)
[docs]@attr.s class CommandOutputBinding(object): """Define the binding behavior for outputs.""" glob = attr.ib(default=None) # null, string, Expression, array[string]
# loadContents, outputEval
[docs]@attr.s class CommandOutputParameter(OutputParameter): """Define an output parameter for a CommandLineTool.""" outputBinding = attr.ib( default=None, converter=lambda data: CommandOutputBinding(**data) if not isinstance( data, CommandOutputBinding ) and data is not None else data, )
[docs]@attr.s class WorkflowOutputParameter(OutputParameter): """Define an output parameter for a Workflow.""" outputSource = attr.ib(default=None)