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# Copyright (C) 2012 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import datetime
from multiprocessing import Manager, Process
import morphlib
class BuildWorker(object):
def __init__(self, name, ident, app):
self.name = name
self.ident = ident
self.settings = app.settings
self.real_msg = app.msg
self.indent = 2
self.idle_since = datetime.datetime.now()
self.manager = Manager()
self.reset()
def indent_more(self):
self.indent += 1
def indent_less(self):
self.indent -= 1
def msg(self, text):
spaces = ' ' * self.indent
self.real_msg('%s%s' % (spaces, text))
def reset(self):
self.process = None
self.blob = None
self._output = self.manager.list()
self._error = self.manager.dict()
def build(self, blob):
raise NotImplementedError
def check_complete(self, timeout):
if self.process:
self.process.join(timeout)
if self.process.is_alive():
return False
else:
self.idle_since = datetime.datetime.now()
return True
else:
return True
@property
def output(self):
try:
return self._output[0]
except IndexError:
return None
@property
def error(self):
return self._error
def options(self):
'''Returns an array of command line options for the settings.
NOTE: This is just a hack that uses internals of the cliapp.Settings
class. We need to merge this kind of functionality into cliapp and
remove this hack!
'''
# use the canonical names of the settings to generate cmdline options
names = list(self.settings._canonical_names)
# internal function to combine an option name and a value into string
def combine(name, value):
if name.startswith('--'):
if isinstance(value, bool):
if value:
return '%s' % name
else:
return '%s=%s' % (name, value)
else:
if isinstance(value, bool):
if value:
return '%s' % name
else:
return '%s %s' % (name, value)
# generate a list of (setting name, option name) pairs
options_list = []
options = self.settings._option_names(names)
name_pairs = [(names[i], options[i]) for i in xrange(0, len(names))]
# convert all settings into command line arguments; drop absent
# settings and make sure to convert all values correctly
for name, option in name_pairs:
value = self.settings[name]
if isinstance(value, list):
for listval in value:
if isinstance(listval, str):
if len(listval) > 0:
string = combine(option, listval)
if string:
options_list.append(string)
else:
string = combine(option, listval)
if string:
options_list.append(string)
else:
if isinstance(value, str):
if len(value) > 0:
string = combine(option, value)
if string:
options_list.append(string)
else:
string = combine(option, value)
if string:
options_list.append(string)
return options_list
def __str__(self):
return self.name
class LocalBuildWorker(BuildWorker):
def __init__(self, name, ident, app):
BuildWorker.__init__(self, name, ident, app)
def run(self, repo, ref, filename, output, error):
ex = morphlib.execute.Execute('.', self.msg)
# generate command line options
args = self.options()
cmdline = ['morph', 'build', repo, ref, filename]
cmdline.extend(args)
# run morph locally in a child process
try:
stdout = ex.runv(cmdline)
output.append(stdout)
except OSError, e:
error['error'] = str(e)
error['command'] = ' '.join(cmdline)
except morphlib.execute.CommandFailure, e:
error['error'] = str(e)
error['command'] = ' '.join(cmdline)
def build(self, blob):
self.reset()
self.blob = blob
args = (blob.morph.treeish.original_repo,
blob.morph.treeish.ref,
blob.morph.filename,
self._output,
self._error)
self.process = Process(group=None, target=self.run, args=args)
self.process.start()
class RemoteBuildWorker(BuildWorker):
def __init__(self, name, ident, app):
BuildWorker.__init__(self, name, ident, app)
self.hostname = ident
def run(self, repo, ref, filename, sudo, output, error):
ex = morphlib.execute.Execute('.', self.msg)
# generate command line options
args = self.options()
cmdline = ['ssh']
if sudo:
cmdline.extend(['-t', '-t', '-t', self.hostname, 'sudo', '-S'])
else:
cmdline.extend([self.hostname, 'fakeroot'])
cmdline.extend(['morph', 'build', repo, ref, filename])
cmdline.extend(args)
# run morph on the other machine
try:
stdout = ex.runv(cmdline)
output.append(stdout)
except OSError, e:
error['error'] = str(e)
error['command'] = ' '.join(cmdline)
except morphlib.execute.CommandFailure, e:
error['error'] = str(e)
error['command'] = ' '.join(cmdline)
def build(self, blob):
self.reset()
self.blob = blob
args = (blob.morph.treeish.original_repo,
blob.morph.treeish.ref,
blob.morph.filename,
blob.morph.kind == 'system',
self._output,
self._error)
self.process = Process(group=None, target=self.run, args=args)
self.process.start()
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