aws-lambda-builders/aws_lambda_builders/actions.py at develop · QPC-database/aws-lambda-builders · GitHub

History

101 lines (67 loc) · 2.67 KB

Raw

100

101

"""

Definition of actions used in the workflow

"""

import logging

import shutil

import six

from aws_lambda_builders.utils import copytree

LOG = logging.getLogger(__name__)

class ActionFailedError(Exception):

"""

Base class for exception raised when action failed to complete. Use this to express well-known failure scenarios.

"""

pass

class Purpose(object):

"""

Enum like object to describe the purpose of each action.

"""

# Action is identifying dependencies, downloading, compiling and resolving them

RESOLVE_DEPENDENCIES = "RESOLVE_DEPENDENCIES"

# Action is copying source code

COPY_SOURCE = "COPY_SOURCE"

# Action is compiling source code

COMPILE_SOURCE = "COMPILE_SOURCE"

@staticmethod

def has_value(item):

return item in Purpose.__dict__.values()

class _ActionMetaClass(type):

def __new__(mcs, name, bases, class_dict):

cls = type.__new__(mcs, name, bases, class_dict)

if cls.__name__ == "BaseAction":

return cls

# Validate class variables

# All classes must provide a name

if not isinstance(cls.NAME, six.string_types):

raise ValueError("Action must provide a valid name")

if not Purpose.has_value(cls.PURPOSE):

raise ValueError("Action must provide a valid purpose")

return cls

class BaseAction(six.with_metaclass(_ActionMetaClass, object)):

"""

Base class for all actions. It does not provide any implementation.

"""

# Every action must provide a name

NAME = None

# Optional description explaining what this action is about. Used to print help text

DESCRIPTION = ""

# What is this action meant for? Must be a valid instance of `Purpose` class

PURPOSE = None

def execute(self):

"""

Runs the action. This method should complete the action, and if it fails raise appropriate exceptions.

:raises lambda_builders.actions.ActionFailedError: Instance of this class if something went wrong with the

action

"""

raise NotImplementedError("execute")

def __repr__(self):

return "Name={}, Purpose={}, Description={}".format(self.NAME, self.PURPOSE, self.DESCRIPTION)

class CopySourceAction(BaseAction):

NAME = "CopySource"

DESCRIPTION = "Copying source code while skipping certain commonly excluded files"

PURPOSE = Purpose.COPY_SOURCE

def __init__(self, source_dir, dest_dir, excludes=None):

self.source_dir = source_dir

self.dest_dir = dest_dir

self.excludes = excludes or []

def execute(self):

copytree(self.source_dir, self.dest_dir, ignore=shutil.ignore_patterns(*self.excludes))

aws-lambda-builders/aws_lambda_builders/actions.py at develop · QPC-database/aws-lambda-builders · GitHub

Expand file tree

Breadcrumbs

actions.py

Latest commit

History

Breadcrumbs

actions.py

File metadata and controls