#!/usr/bin/env python

#

# This is the main executable of the env-watcher.

#

# It is called from within the shell function that passes the entire

# environment to this executable. The shell function also takes care of

# executing possible corrective changes in the shell environment afterwards.

#

# The design of this package is such that all shell-specific code is imported

# dynamically by ShellParser.GetShellParser. At the moment I only have code

# for the Bash-shell, but that may change at some point.

#

# All the managing, storing and diff-ing are done on shell-independent

# objects defined in EnvironmentObjects.

import os

import sys

# some setup paths:

session_directory = os.environ["ENV_WATCHER_SESSION"]

main_directory = os.environ["ENV_WATCHER_DIR"]

if not session_directory or not main_directory:

print >>sys.stderr, "Your EnvWatcher environment was not properly set up. Please use the included setup.sh file."

sys.exit(127)

# if this fails then there is nothing I can do:

sys.path.append(os.environ["ENV_WATCHER_DIR"]+os.sep+"python")

from Debug import log

def main():

all_input = os.environ["ENV_WATCHER_INPUT"]

if not all_input:

raise Exception("This executable needs to be called from within the shell function env-watcher.\nPlease source the relevant setup script and procceed from there.")

from env_manager import env_manager

import argparse

parser = argparse.ArgumentParser(description='Monitor the shell environment')

parser.add_argument("-d","--debug", action="store_const", const=True, default=False, help="enable debug mode")

parser.add_argument("-f","--force", action="store_const", const=True, default=False, help="no questions asked. Overwriting is default.")

parser.add_argument("action",action="store", choices=env_manager.action_names, help="action to perform. Use 'usage' for full explanations.")

parser.add_argument("name",action="store", nargs="?", default="",help="Chosen name for the recording session.")

log("Command line:",sys.argv)

args=parser.parse_args(sys.argv[1:])

log("Parsed arguments",args)

action=env_manager.action_names[args.action]

import inspect

if "name" in inspect.getargspec(action)[0] and not args.name:

raise Exception("The action '%s' requires the 'name' argument." % args.action)

from ShellParser import GetShellParser

shellParser = GetShellParser(os.environ["SHELL"])

shell = shellParser(conf_dir=main_directory+"/config", input=all_input)

manager = env_manager(shell=shell, session_dir=session_directory, main_dir=main_directory)

return action(manager,name=args.name)

if __name__ == '__main__':

res=127

try:

res=main()

except SystemExit:

log()

except Exception, e:

print >>sys.stderr, "ERROR:",e

log()

except KeyboardInterrupt:

log()

except:

import sys

print >>sys.stderr, "Unknown error:",sys.exc_value,sys.exc_type

log()

sys.exit(res)