odectl

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Copyright (c) 2018 Bhojpur Consulting Private Limited, India. All rights reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

import logging
import os
import stat
import sys

import warnings
warnings.filterwarnings("ignore", category=DeprecationWarning)
# Assuming a Bhojpur ODE CLI user never wants to see development details
# such as: source code that has been deprecated.

def not_root():
    """
    Check that the effective current user is not 0
    on systems supporting os.geteuid()
    """
    try:
        euid = os.geteuid()
        if euid == 0:
            print("FATAL: Running %s as root can corrupt your directory permissions." % sys.argv[0])
            sys.exit(1)
        else:
            return euid
    except AttributeError as ae:
        # This platform doesn't support effective uid
        # So nothing to worry about.
        return None

euid = not_root()

def readlink(file=sys.argv[0]):
    """
    Resolve symlinks and similar. This is useful to allow
    linking this file under /usr/bin/, for example.
    """
    import stat

    file = sys.argv[0]
    while stat.S_ISLNK(os.lstat(file)[stat.ST_MODE]):
        target = os.readlink(file)
        if target[0] != "/":
            file = os.path.join(os.path.dirname(file), target)
        else:
            file = target

    file = os.path.abspath(file)
    return file

print("Bhojpur ODE client engine (python)")
print("Copyright (c) 2018 by Bhojpur Consulting Private Limited, India.")
print("All rights reserved.\n")

ode_home = None
if os.environ.__contains__("ODE_HOME"):
    ode_home = os.environ["ODE_HOME"]
    if not os.path.exists(ode_home):
        print("ODE_HOME=%s cannot be found" % ode_home)
        sys.exit(3)

if ode_home:
    top = ode_home
else:
    exe = readlink()
    top = os.path.join(exe, os.pardir, os.pardir)

#
# This list needs to be kept in line with ode.cli.CLI._env
#
top = os.path.normpath(top)
lib = os.path.join(top, "pkg","client")
lpy = os.path.join(top, "pkg","client","python")
ipy = os.path.join(top, "pkg","client","fallback")
var = os.path.join(top, "var")
vlb = os.path.join(var, "lib",)
sys.path.insert(0,vlb);
sys.path.insert(0,lpy);
sys.path.append(ipy)

if not os.path.exists(lib):
    print("WARN: %s does not exist. It is unlikely that Bhojpur ODE will run properly" % lib)

#
# Testing shortcut. If the first argument is an
# empty string, exit sucessfully.
#
if len(sys.argv) == 2 and sys.argv[1] == "": sys.exit(0)

#
# Primary activity: import ode.cli and launch
# catching any Ctrl-Cs from the user
#
try:
    try:
        import ode.cli
    except ImportError as ie:
        print("*"*80)
        print("""
        ERROR: Could not import Bhojpur ODE (ode.cli) (%s)

        This means that your installation is incomplete. Contact
        the Bhojpur ODE mailing lists for more information:

        https://desk.bhojpur-consulting.com/

        If you are building from source, please supply the build log
        as well as which version you are building from. If you
        downloaded a distribution, please provide which link you
        used.
        """ % ie)
        print("*"*80)
        print("""
        Debugging Info:
        --------------
        CWD=%s
        VERSION=%s
        ODE_HOME=%s
        PYTHONPATH=%s
        """ % (os.getcwd(), sys.version.replace("\n"," "), ode_home, sys.path))
        sys.exit(2)

    logging.basicConfig(level=logging.WARN)
    rv = ode.cli.argv()
    sys.exit(rv)
except KeyboardInterrupt as ki:
    print("Cancelled")
    sys.exit(1)