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# Copyright (C) 2012 Codethink Limited
#
import json
import os
import logging
import string
class LorryFileRunner(object):
def __init__(self, mgr, lorryname):
self.mgr = mgr
self.lorryname = lorryname
self.lorryfile = os.path.join(self.mgr.workdir,
self._esc(lorryname) + ".lorry")
def _esc(self, name):
valid_chars = string.digits + string.letters + '%_'
transl = lambda x: x if x in valid_chars else '_'
return ''.join([transl(x) for x in name])
def __enter__(self):
lorry_obj = { self.lorryname:
self.mgr.lorry_state[self.lorryname]['lorry'] }
with open(self.lorryfile, "w") as fh:
json.dump(lorry_obj, fh)
fh.write("\n")
return self
def __exit__(self, exctype, excvalue, exctraceback):
os.unlink(self.lorryfile)
def run_lorry(self, *args):
cmdargs = list(args)
cmdargs.append(self.lorryfile)
exit, out, err = self.mgr.app.maybe_runcmd(cmdargs)
if exit == 0:
logging.info("Lorry of %s succeeded: %s" % (self.lorryname, out))
else:
logging.warn("Lorry of %s failed: %s" % (self.lorryname, err))
class WorkingStateManager(object):
'''Manage the working state of lorry-controller'''
def __init__(self, app):
self.app = app
self.workdir = os.path.join(self.app.settings['work-area'], 'work')
def __enter__(self):
self._load_state()
return self
def __exit__(self, exctype, excvalue, exctraceback):
if not self.app.settings['dry-run']:
self.save_state()
else:
logging.debug("DRY-RUN: Not saving state again")
def _load_state(self):
self.lorry_state_file = os.path.join(self.workdir,
"last-lorry-state.json")
if os.path.exists(self.lorry_state_file):
logging.debug("Loading state file: %s" % self.lorry_state_file)
with open(self.lorry_state_file, "r") as fh:
self.lorry_state = json.load(fh)
else:
self.lorry_state = dict()
def save_state(self):
logging.debug("Serialising state: %s" % self.lorry_state_file)
with open(self.lorry_state_file, "w") as fh:
json.dump(self.lorry_state, fh, sort_keys=True, indent=4)
fh.write("\n")
def runner(self, lorryname):
return LorryFileRunner(self, lorryname)
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