workload-automation/wlauto/core/output.py

import logging
import os
import shutil
import string
import sys
import uuid
from copy import copy

from wlauto.utils.misc import touch
from wlauto.utils.serializer import write_pod, read_pod


logger = logging.getLogger('output')


class RunInfo(object):
    """
    Information about the current run, such as its unique ID, run
    time, etc.

    """
    @staticmethod
    def from_pod(pod):
        uid = pod.pop('uuid')
        if uid is not None:
            uid = uuid.UUID(uid)
        instance = RunInfo(**pod)
        instance.uuid = uid
        return instance

    def __init__(self, run_name=None, project=None, project_stage=None,
                 start_time=None, end_time=None, duration=None):
        self.uuid = uuid.uuid4()
        self.run_name = None
        self.project = None
        self.project_stage = None
        self.start_time = None
        self.end_time = None
        self.duration = None

    def to_pod(self):
        d = copy(self.__dict__)
        d['uuid'] = str(self.uuid)
        return d


class RunState(object):
    """
    Represents the state of a WA run.

    """
    @staticmethod
    def from_pod(pod):
        return RunState()

    def __init__(self):
        pass

    def to_pod(self):
        return {}


class RunOutput(object):

    @property
    def logfile(self):
        return os.path.join(self.basepath, 'run.log')

    @property
    def metadir(self):
        return os.path.join(self.basepath, '__meta')

    @property
    def infofile(self):
        return os.path.join(self.metadir, 'run_info.json')

    @property
    def statefile(self):
        return os.path.join(self.basepath, '.run_state.json')

    def __init__(self, path):
        self.basepath = path
        self.info = None
        self.state = None
        if (not os.path.isfile(self.statefile) or
                not os.path.isfile(self.infofile)):
            msg = '"{}" does not exist or is not a valid WA output directory.'
            raise ValueError(msg.format(self.basepath))
        self.reload()

    def reload(self):
        self.info = RunInfo.from_pod(read_pod(self.infofile))
        self.state = RunState.from_pod(read_pod(self.statefile))

    def write_info(self):
        write_pod(self.info.to_pod(), self.infofile)

    def write_state(self):
        write_pod(self.state.to_pod(), self.statefile)



def init_wa_output(path, wa_state, force=False):
    if os.path.exists(path):
        if force:
            logger.info('Removing existing output directory.')
            shutil.rmtree(os.path.abspath(path))
        else:
            raise RuntimeError('path exists: {}'.format(path))

    logger.info('Creating output directory.')
    os.makedirs(path)
    meta_dir = os.path.join(path, '__meta')
    os.makedirs(meta_dir)
    _save_raw_config(meta_dir, wa_state)
    touch(os.path.join(path, 'run.log'))

    info = RunInfo(
            run_name=wa_state.run_config.run_name,
            project=wa_state.run_config.project,
            project_stage=wa_state.run_config.project_stage,
           )
    write_pod(info.to_pod(), os.path.join(meta_dir, 'run_info.json'))
    
    with open(os.path.join(path, '.run_state.json'), 'w') as wfh:
        wfh.write('{}')

    return RunOutput(path)


def _save_raw_config(meta_dir, state):
    raw_config_dir = os.path.join(meta_dir, 'raw_config')
    os.makedirs(raw_config_dir)

    for i, source in enumerate(state.loaded_config_sources):
        if not os.path.isfile(source):
            continue
        basename = os.path.basename(source)
        dest_path = os.path.join(raw_config_dir, 'cfg{}-{}'.format(i, basename))
        shutil.copy(source, dest_path)