Github user nikhilkh commented on a diff in the pull request:

    https://github.com/apache/cordova-windows/pull/107#discussion_r36817293
  
    --- Diff: template/cordova/lib/log.js ---
    @@ -0,0 +1,227 @@
    +/*
    +       Licensed to the Apache Software Foundation (ASF) under one
    +       or more contributor license agreements.  See the NOTICE file
    +       distributed with this work for additional information
    +       regarding copyright ownership.  The ASF licenses this file
    +       to you under the Apache License, Version 2.0 (the
    +       "License"); you may not use this file except in compliance
    +       with the License.  You may obtain a copy of the License at
    +
    +         http://www.apache.org/licenses/LICENSE-2.0
    +
    +       Unless required by applicable law or agreed to in writing,
    +       software distributed under the License is distributed on an
    +       "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    +       KIND, either express or implied.  See the License for the
    +       specific language governing permissions and limitations
    +       under the License.
    +*/
    +
    +var path    = require('path'),
    +    et      = require('elementtree'),
    +    Q       = require('q'),
    +    cp      = require('child_process'),
    +    shelljs = require('shelljs'),
    +    ROOT    = path.join(__dirname, '..', '..');
    +
    +var appTracingLogInitialState = null,
    +    adminLogInitialState = null;
    +
    +/*
    + * Gets windows AppHost/ApplicationTracing and AppHost/Admin logs
    + * and prints them to console
    + */
    +module.exports.run = function() {
    +    
getLogState('Microsoft-Windows-AppHost/ApplicationTracing').then(function 
(state) {
    +        appTracingLogInitialState = state;
    +        return getLogState('Microsoft-Windows-AppHost/Admin');
    +    }).then(function(state) {
    +        adminLogInitialState = state;
    +        return enableLogging('Microsoft-Windows-AppHost/Admin');
    +    }).then(function () {
    +        return 
enableLogging('Microsoft-Windows-AppHost/ApplicationTracing');
    +    }).then(function () {
    +        console.log('Now printing logs. To stop, please press Ctrl+C 
once.');
    +        startLogging('Microsoft-Windows-AppHost/Admin');
    +        startLogging('Microsoft-Windows-AppHost/ApplicationTracing');
    +    }).catch(function (error) {
    +        console.error(error);
    +    });
    +
    +    // Disable logs before exiting
    +    process.on('exit', function () {
    +        if ((appTracingLogInitialState !== null) && 
!appTracingLogInitialState) {
    +            disableLogging('Microsoft-Windows-AppHost/ApplicationTracing');
    +        }
    +        if ((adminLogInitialState !== null) && !adminLogInitialState) {
    +            disableLogging('Microsoft-Windows-AppHost/Admin');
    +        }
    +    });
    +
    +    // Catch Ctrl+C event and exit gracefully
    +    process.on('SIGINT', function () {
    +        process.exit(2);
    +    });
    +
    +    // Catch uncaught exceptions, print trace, then exit gracefully
    +    process.on('uncaughtException', function(e) {
    +        console.log(e.stack);
    +        process.exit(99);
    +    });
    +};
    +
    +function startLogging(channel) {
    +    var startTime = new Date().toISOString();
    +    setInterval(function() {
    +        var command = 'wevtutil qe ' + channel + ' /q:"*[System 
[(TimeCreated [@SystemTime>\'' + startTime + '\'])]]" /e:root';
    +        cp.exec(command, function (error, stdout, stderr) {
    +            if (error) {
    +                throw new Error('Failed to run wevtutil command. ' + 
error);
    +            } else {
    +                parseEvents(stdout).forEach(function (evt) {
    +                    startTime = evt.timeCreated;
    +                    console.log(stringifyEvent(evt));
    +                });
    +            }
    +        });
    +    }, 1000);
    +}
    +
    +module.exports.help = function() {
    +    console.log('Usage: ' + path.relative(process.cwd(), path.join(ROOT, 
'cordova', 'log')));
    +    console.log('Continuously prints the windows logs output to the 
command line.');
    +    process.exit(0);
    +};
    +
    +function getElementValue(et, element, attribute) {
    +    var result;
    +
    +    var found = et.findall(element);
    +    if (found.length > 0) {
    +        if (!!attribute) {
    +            result = found[0].get(attribute);
    +        } else {
    +            result = found[0].text; 
    +        }
    +    }
    +
    +    return result;
    +}
    +
    +function parseEvents(output) {
    +    var etree = et.parse(output);
    +    var events = etree.getroot().findall('./Event');
    +    var results = [];
    +
    +    events.forEach(function (event) {
    +        // Get only unhandled exceptions from Admin log
    +        if (getElementValue(event, './System/Channel') === 
'Microsoft-Windows-AppHost/Admin' &&
    +            typeof getElementValue(event, 
'./UserData/WWAUnhandledApplicationException') === 'undefined') {
    --- End diff --
    
    You might want to look for both UnhandledApplicationException and 
WWATerminateApplication 



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