Feature/relax and bands wc

aiida_common_workflows/workflows/relax_and_bands.py

@@ -0,0 +1,309 @@
+# -*- coding: utf-8 -*-
+"""
+Workflow that runs a relaxation and subsequently calculates bands.
+
+It can use any code plugin implementing the common relax workflow and the
+common bands workflow.
+It also allows the automatic use of ``seekpath`` in order to get the high
+symmetries path for bands.
+"""
+from functools import partial
+import inspect
+
+from aiida import orm
+from aiida.common import AttributeDict, exceptions
+from aiida.engine import ToContext, WorkChain, calcfunction, if_
+from aiida.orm.nodes.data.base import to_aiida_type
+from aiida.plugins import WorkflowFactory
+
+from aiida_common_workflows.workflows.bands.generator import CommonBandsInputGenerator
+from aiida_common_workflows.workflows.bands.workchain import CommonBandsWorkChain
+from aiida_common_workflows.workflows.relax.generator import CommonRelaxInputGenerator, RelaxType
+from aiida_common_workflows.workflows.relax.workchain import CommonRelaxWorkChain
+
+
+@calcfunction
+def seekpath_explicit_kp_path(structure, **seekpath_params):
+    """
+    Return the modified structure of SeekPath and the explicit list of kpoints.
+
+    :param structure: StructureData containing the structure information.
+    :param seekpath_params: Dict of seekpath parameters to be unwrapped as arguments of `get_explicit_kpoints_path`.
+    """
+    from aiida.tools import get_explicit_kpoints_path
+
+    results = get_explicit_kpoints_path(structure, **seekpath_params)
+
+    return {'structure': results['primitive_structure'], 'kpoints': results['explicit_kpoints']}
+
+
+def validate_inputs(value, _):  #pylint: disable=too-many-branches,too-many-return-statements
+    """Validate the entire input namespace."""
+
+    process_class = WorkflowFactory(value['relax_sub_process_class'].value)
+    generator = process_class.get_input_generator()
+
+    # Validate that the provided ``relax`` inputs are valid for the associated input generator.
+    try:
+        generator.get_builder(**AttributeDict(value['relax']))
+    except Exception as exc:  # pylint: disable=broad-except
+        return f'`{generator.__class__.__name__}.get_builder()` fails for the provided `relax_inputs`: {exc}'
+
+    #Validate that the plugin for bands and the relax are the same
+    bands_plugin = value['bands_sub_process_class'].value.replace('common_workflows.bands.', '')
+    relax_plugin = value['relax_sub_process_class'].value.replace('common_workflows.relax.', '')
+    if relax_plugin != bands_plugin:
+        return 'Different code between relax and bands. Not supported yet.'
+
+
+def validate_sub_process_class(value, _, required_class=None):
+    """Validate the sub process class."""
+    try:
+        process_class = WorkflowFactory(value.value)
+    except exceptions.EntryPointError:
+        return f'`{value.value}` is not a valid or registered workflow entry point.'
+
+    if not inspect.isclass(process_class) or not issubclass(process_class, required_class):
+        return f'`{value.value}` is not a subclass of the `{required_class}` common workflow.'
+
+
+class RelaxAndBandsWorkChain(WorkChain):
+    """
+    Workflow to carry on a relaxation and subsequently calculate the bands.
+    """
+
+    @classmethod
+    def define(cls, spec):
+        # yapf: disable
+        super().define(spec)
+        spec.input_namespace(
+            'seekpath_parameters',
+            help='Inputs for the seekpath to be passed to `get_explicit_kpoints_path`.',
+        )
+        spec.input(
+            'seekpath_parameters.reference_distance',
+            valid_type=orm.Float,
+            default=lambda: orm.Float(0.025),
+            serializer=to_aiida_type,
+            help='Reference target distance between neighboring k-points along the path in units 1/Å.',
+        )
+        spec.input(
+            'seekpath_parameters.symprec',
+            valid_type=orm.Float,
+            default=lambda: orm.Float(0.00001),
+            serializer=to_aiida_type,
+            help='The symmetry precision used internally by SPGLIB.',
+        )
+        spec.input(
+            'seekpath_parameters.angle_tolerance',
+            valid_type=orm.Float,
+            default=lambda: orm.Float(-1.0),
+            serializer=to_aiida_type,
+            help='The angle tollerance used internally by SPGLIB.',
+        )
+        spec.input(
+            'seekpath_parameters.threshold',
+            valid_type=orm.Float,
+            default=lambda: orm.Float(0.0000001),
+            serializer=to_aiida_type,
+            help='The treshold for determining edge cases. Meaning is different depending on bravais lattice.',
+        )
+        spec.input(
+            'seekpath_parameters.with_time_reversal',
+            valid_type=orm.Bool,
+            default=lambda: orm.Bool(True),
+            serializer=to_aiida_type,
+            help='If False, and the group has no inversion symmetry, additional lines are returned.',
+        )
+
+        spec.expose_inputs(
+                CommonRelaxInputGenerator,
+                namespace='relax',
+                namespace_options={'help':'inputs for the relaxation, they are inputs of CommonRelaxInputGenerator'}
+                )
+        spec.inputs['relax']['protocol'].non_db = True
+        spec.inputs['relax']['spin_type'].non_db = True
+        spec.inputs['relax']['relax_type'].non_db = True
+        spec.inputs['relax']['electronic_type'].non_db = True
+        spec.inputs['relax']['magnetization_per_site'].non_db = True
+        spec.inputs['relax']['threshold_forces'].non_db = True
+        spec.inputs['relax']['threshold_stress'].non_db = True
+        spec.inputs['relax']['engines']['relax']['options'].non_db = True
+
+        spec.expose_inputs(
+                CommonBandsInputGenerator,
+                namespace='bands',
+                exclude=('parent_folder'),
+                namespace_options={'help':'inputs for the bands calc, they are inputs of CommonBandsInputGenerator'}
+                )
+        spec.inputs['bands']['engines']['bands']['options'].non_db = True
+        spec.inputs['bands']['bands_kpoints'].required = False
+
+        spec.expose_inputs(
+                CommonRelaxInputGenerator,
+                namespace='extra_scf',
+                exclude=('structure', 'relax_type', 'threshold_stress', 'threshold_forces'),
+                namespace_options={
+                    'required': False,
+                    'populate_defaults': False,
+                    'help': 'inputs of a possible second relaxation, if not specified, '
+                        'inputs of first relaxation will be used, except the relaxation type set to NONE'
+                        }
+                )
+        spec.inputs['extra_scf']['protocol'].non_db = True
+        spec.inputs['extra_scf']['spin_type'].non_db = True
+        spec.inputs['extra_scf']['electronic_type'].non_db = True
+        spec.inputs['extra_scf']['magnetization_per_site'].non_db = True
+        spec.inputs['extra_scf']['engines']['relax']['options'].non_db = True
+        spec.inputs['extra_scf']['engines']['relax']['code'].required = False
+
+        spec.input('relax_sub_process_class',
+                valid_type=orm.Str,
+                serializer=to_aiida_type,
+                validator=partial(validate_sub_process_class, required_class=CommonRelaxWorkChain)
+                )
+        spec.input('bands_sub_process_class',
+                valid_type=orm.Str,
+                serializer=to_aiida_type,
+                validator=partial(validate_sub_process_class, required_class=CommonBandsWorkChain)
+                )
+
+        spec.inputs.validator = validate_inputs
+
+        spec.outline(
+            cls.initialize,
+            cls.run_common_relax_wc,
+            cls.prepare_bands,
+            if_(cls.should_run_extra_scf)(
+                cls.fix_inputs,
+                cls.run_common_relax_wc
+            ),
+            cls.run_bands,
+            cls.inspect_bands
+        )
+
+        spec.output('structure', valid_type=orm.StructureData, help='The final structure.')
+        spec.output('bands', valid_type=orm.BandsData,
+            help='The computed total energy of the relaxed structures at each scaling factor.')
+        spec.exit_code(400, 'ERROR_SUB_PROCESS_FAILED',
+            message='At least one of the sub processes did not finish successfully.')
+
+
+    def initialize(self):
+        """
+        Initialize some variables that will be used and modified in the workchain
+        """
+        self.ctx.inputs = AttributeDict(self.inputs.relax)
+        self.ctx.need_other_scf = False
+
+
+    def run_common_relax_wc(self):
+        """
+        Run the common relax workchain.
+
+        It can be a relaxation or a simple scf, depending on the self.ctx.inputs
+        """
+        process_class = WorkflowFactory(self.inputs.relax_sub_process_class.value)
+
+        builder = process_class.get_input_generator().get_builder(
+            **self.ctx.inputs
+        )
+        #builder._update(**self.inputs.get('relax_sub_process', {}))  # pylint: disable=protected-access
+
+        self.report(f'submitting `{builder.process_class.__name__}` for relaxation.')
+        running = self.submit(builder)
+
+        return ToContext(workchain_relax=running)
+
+
+    def prepare_bands(self):
+        """
+        Check that the first workchain finished successfully and analyze bands inputs.
+
+        Check that the first workchain finished successfully or abort the workchain.
+        Analyze the ``bands`` namespace and decide whether to call SeeKpath or not.
+        When SeeKpath is called in order to create the bands high symmetries path,
+        the structure might change, therefore a new scf calculation should be
+        performed before calculating bands.
+        A user can also explicitly call for an extra scf, setting one of the
+        inputs in the ``extra_scf`` namespace.
+        """
+        if not self.ctx.workchain_relax.is_finished_ok:
+            self.report('Relaxation did not finish successful so aborting the workchain.')
+            return self.exit_codes.ERROR_SUB_PROCESS_FAILED.format(cls=self.inputs.relax_sub_process_class.value)  # pylint: disable=no-member
+        if 'relaxed_structure' in self.ctx.workchain_relax.outputs:
+            self.ctx.inputs['structure'] = self.ctx.workchain_relax.outputs.relaxed_structure
+
+        if 'bands_kpoints' not in self.inputs.bands:
+            self.report('Using SekPath to create kpoints for bands. Structure might change.')
+            seekpath_dict = AttributeDict(self.inputs.seekpath_parameters)
+            res = seekpath_explicit_kp_path(self.ctx.inputs['structure'], **seekpath_dict)
+            self.ctx.inputs['structure'] = res['structure']
+            self.ctx.bandskpoints = res['kpoints']
+            self.ctx.need_other_scf = True
+        else:
+            self.report('Kpoints for bands in inputs detected.')
+            self.ctx.need_other_scf = False
+            self.ctx.bandskpoints = self.inputs.bands['bands_kpoints']
+
+        if self.ctx.need_other_scf:
+            self.report('A new scf run needed')
+
+        if 'extra_scf' in self.inputs and not self.ctx.need_other_scf:
+            self.report('A new scf run requested')
+            self.ctx.need_other_scf = True
+
+    def should_run_extra_scf(self):
+        """
+        Return the bool variable that triggers a further scf calculation before the bands run.
+        """
+        return self.ctx.need_other_scf
+
+    def fix_inputs(self):
+        """
+        Set the inputs for a possible extra scf step.
+
+        Set the inputs of a possible second call to the CommonRelaxInputGenerator.
+        This includes forcing ``RelaxType`` to be ``NONE`` and adding whatever optional overrides
+        specified by users in the ``extra_scf`` namespace.
+        """
+        self.ctx.inputs['relax_type'] = RelaxType.NONE
+
+        for key in self.ctx.inputs:
+            if 'extra_scf' in self.inputs:
+                if key in self.inputs.extra_scf:
+                    self.ctx.inputs[key] = self.inputs.extra_scf[key]
+
+    def run_bands(self):
+        """
+        Run the sub process to obtain the bands.
+        """
+        rel_wc = self.ctx.workchain_relax
+
+        process_class = WorkflowFactory(self.inputs.bands_sub_process_class.value)
+
+        builder = process_class.get_input_generator().get_builder(
+            bands_kpoints=self.ctx.bandskpoints,
+            parent_folder=rel_wc.outputs.remote_folder,
+            engines=AttributeDict(self.inputs.bands['engines']),
+        )
+
+        #builder._update(**self.inputs.get('bands_sub_process', {}))  # pylint: disable=protected-access
+
+        self.report(f'submitting `{builder.process_class.__name__}` for bands.')
+        running = self.submit(builder)
+
+        return ToContext(workchain_bands=running)
+
+    def inspect_bands(self):
+        """
+        Check the success of the bands calculation and return outputs.
+        """
+        if not self.ctx.workchain_bands.is_finished_ok:
+            self.report('Bands calculation did not finish successful so aborting the workchain.')
+            return self.exit_codes.ERROR_SUB_PROCESS_FAILED.format(cls=self.inputs.bands_sub_process_class)
+
+        self.report('Bands calculation finished successfully, returning outputs')
+
+        self.out('structure', self.ctx.workchain_bands.inputs.structure)
+        self.out('bands', self.ctx.workchain_bands.outputs.bands)

setup.json

@@ -61,6 +61,7 @@
         "aiida.workflows": [
             "common_workflows.dissociation_curve = aiida_common_workflows.workflows.dissociation:DissociationCurveWorkChain",
             "common_workflows.eos = aiida_common_workflows.workflows.eos:EquationOfStateWorkChain",
+            "common_workflows.relax_and_bands = aiida_common_workflows.workflows.common_workflows.relax_and_bands:RelaxAndBandsWorkChain",
             "common_workflows.relax.abinit = aiida_common_workflows.workflows.relax.abinit.workchain:AbinitCommonRelaxWorkChain",
             "common_workflows.relax.bigdft = aiida_common_workflows.workflows.relax.bigdft.workchain:BigDftCommonRelaxWorkChain",
             "common_workflows.relax.castep = aiida_common_workflows.workflows.relax.castep.workchain:CastepCommonRelaxWorkChain",