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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def main_entry(ctx, verbose, debug, quiet, json, plain, html, config_override):
 """ Anchore is a tool to analyze, query, and curate container images. The options at this top level control stdout and stderr verbosity and format. After installation, the first command run should be: 'anchore feeds list' to initialize the system and load feed data. High-level example flows: Initialize the system and sync the by-default subscribed feed 'vulnerabilties': \b anchore feeds list anchore feeds sync Analyze an image docker pull nginx:latest anchore analyze --image nginx:latest --imagetype base Generate a summary report on all analyzed images anchore audit report Check gate output for nginx:latest: anchore gate --image nginx:latest """

    # Load the config into the context object
    logfile = None
    debug_logfile = None

    try:
        try:
            config_overrides = {}
            if config_override:
                for el in config_override:
                    try:
                        (key, val) = el.split('=')
                        if not key or not val:
                            raise Exception("could not split by '='")
                        config_overrides[key] = val
                    except:
                        click.echo("Error: specified --config_override param cannot be parsed (should be <config_opt>=<value>): " + str(el))
                        exit(1)

            args = {'verbose': verbose, 'debug': debug, 'json': json, 'plain': plain, 'html': html, 'quiet': quiet, 'config_overrides':config_overrides}
            anchore_conf = AnchoreConfiguration(cliargs=args)
        except Exception as err:
            click.echo("Error setting up/reading Anchore configuration", err=True)
            click.echo("Info: "+str(err), err=True)
            import traceback
            traceback.print_exc()
            sys.exit(1)
        try:
            logfile = anchore_conf.data['log_file'] if 'log_file' in anchore_conf.data else None
            debug_logfile = anchore_conf.data['debug_log_file'] if 'debug_log_file' in anchore_conf.data else None
        except Exception, e:
            click.echo(str(e))

        ctx.obj = anchore_conf

    except:
        if ctx.invoked_subcommand != 'system':
            click.echo('Expected, but did not find configuration file at %s' % os.path.join(AnchoreConfiguration.DEFAULT_CONFIG_FILE), err=True)
            exit(1)

    try:
        init_output_format(json, plain, debug, verbose, quiet, log_filepath=logfile, debug_log_filepath=debug_logfile)
    except Exception, e:
        click.echo('Error initializing logging: %s' % str(e))
        exit(2)

    if not anchore_pre_flight_check(ctx):
        anchore_print_err("Error running pre-flight checks")
        exit(1)

    try:
        if not anchore.anchore_utils.anchore_common_context_setup(ctx.obj):
            anchore_print_err("Error setting up common data based on configuration")
            exit(1)
    except ValueError as err:
        print "ERROR: " + str(err)
        exit(1)