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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import traceback
from mozperftest.utils import MachLogger
class StopRunError(Exception):
pass
class Layer(MachLogger):
# layer name
name = "unset"
# activated by default ?
activated = False
# list of arguments grabbed by PerftestArgumentParser
arguments = {}
# If true, calls on_exception() on errors
user_exception = False
def __init__(self, env, mach_command):
MachLogger.__init__(self, mach_command)
self.return_code = 0
self.mach_cmd = mach_command
self.run_process = mach_command.run_process
self.env = env
def _normalize_arg(self, name):
if name.startswith("--"):
name = name[2:]
if not name.startswith(self.name):
name = "%s-%s" % (self.name, name)
return name.replace("-", "_")
def get_arg_names(self):
return [self._normalize_arg(arg) for arg in self.arguments]
def set_arg(self, name, value):
"""Sets the argument"""
name = self._normalize_arg(name)
if name not in self.get_arg_names():
raise KeyError(
"%r tried to set %r, but does not own it" % (self.name, name)
)
return self.env.set_arg(name, value)
def get_arg(self, name, default=None):
return self.env.get_arg(name, default, self)
def __enter__(self):
self.debug("Running %s:setup" % self.name)
self.setup()
return self
def __exit__(self, type, value, traceback):
# XXX deal with errors here
self.debug("Running %s:teardown" % self.name)
self.teardown()
def __call__(self, metadata):
has_exc_handler = self.env.hooks.exists("on_exception")
self.debug("Running %s:run" % self.name)
try:
metadata = self.run(metadata)
except Exception as e:
if self.user_exception and has_exc_handler:
self.error("User handled error")
for line in traceback.format_exc().splitlines():
self.error(line)
resume_run = self.env.hooks.run("on_exception", self.env, self, e)
if resume_run:
return metadata
raise StopRunError()
else:
raise
return metadata
def setup(self):
pass
def teardown(self):
pass
def run(self, metadata):
return metadata
class Layers(Layer):
def __init__(self, env, mach_command, factories):
super(Layers, self).__init__(env, mach_command)
def _active(layer):
# if it's activated by default, see if we need to deactivate
# it by looking for the --no-layername option
if layer.activated:
return not env.get_arg("no-" + layer.name, False)
# if it's deactivated by default, we look for --layername
return env.get_arg(layer.name, False)
self.layers = [
factory(env, mach_command) for factory in factories if _active(factory)
]
self.env = env
self._counter = -1
def _normalize_arg(self, name):
if name.startswith("--"):
name = name[2:]
return name.replace("-", "_")
def get_layer(self, name):
for layer in self.layers:
if layer.name == name:
return layer
return None
@property
def name(self):
return " + ".join([l.name for l in self.layers])
def __iter__(self):
self._counter = -1
return self
def __next__(self):
self._counter += 1
try:
return self.layers[self._counter]
except IndexError:
raise StopIteration
def __enter__(self):
self.setup()
return self
def __exit__(self, type, value, traceback):
# XXX deal with errors here
self.teardown()
def setup(self):
for layer in self.layers:
self.debug("Running %s:setup" % layer.name)
layer.setup()
def teardown(self):
for layer in self.layers:
self.debug("Running %s:teardown" % layer.name)
layer.teardown()
def __call__(self, metadata):
for layer in self.layers:
metadata = layer(metadata)
return metadata
def set_arg(self, name, value):
"""Sets the argument"""
name = self._normalize_arg(name)
found = False
for layer in self.layers:
if name in layer.get_arg_names():
found = True
break
if not found:
raise KeyError(
"%r tried to set %r, but does not own it" % (self.name, name)
)
return self.env.set_arg(name, value)
def get_arg(self, name, default=None):
return self.env.get_arg(name, default)
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