function isServerBasedRun(): boolean {
    const batchType = tl.getInput('distributionBatchType');
    if (batchType && batchType === 'basedOnTestCases') {
        const batchSize = tl.getInput('batchingBasedOnAgentsOption');
        if (batchSize && batchSize === 'customBatchSize') {
            return true;
        }
    } else if (batchType && batchType === 'basedOnExecutionTime') {
        return true;
    } else if (batchType && batchType === 'basedOnAssembly') {
        return true;
    }

    const testType = tl.getInput('testSelector');
    tl.debug('Value of Test Selector :' + testType);
    if (testType.toLowerCase() === 'testplan' || testType.toLowerCase() === 'testrun') {
        return true;
    }

    const parallelExecution = tl.getVariable('System.ParallelExecutionType');
    tl.debug('Value of ParallelExecutionType :' + parallelExecution);

    if (parallelExecution && parallelExecution.toLowerCase() === 'multimachine') {
        const dontDistribute = tl.getBoolInput('dontDistribute');
        if (dontDistribute) {
            return false;
        }
        return true;
    }

    return false;
}

async function main(): Promise<void> {
    tl.setResourcePath(path.join(__dirname, 'task.json'));
    let packagingLocation: pkgLocationUtils.PackagingLocation;
    try {
        packagingLocation = await pkgLocationUtils.getPackagingUris(pkgLocationUtils.ProtocolType.Npm);
    } catch (error) {
        tl.debug('Unable to get packaging URIs, using default collection URI');
        tl.debug(JSON.stringify(error));
        const collectionUrl = tl.getVariable('System.TeamFoundationCollectionUri');
        packagingLocation = {
            PackagingUris: [collectionUrl],
            DefaultPackagingUri: collectionUrl
        };
    }
    const forcedUrl = tl.getVariable('Npm.PackagingCollectionUrl');
    if (forcedUrl) {
        packagingLocation.DefaultPackagingUri = forcedUrl;
        packagingLocation.PackagingUris.push(forcedUrl);
    }

    await _logNpmStartupVariables(packagingLocation);

    const command = tl.getInput(NpmTaskInput.Command);
    switch (command) {
        case NpmCommand.Install:
            return npmCustom.run(packagingLocation, NpmCommand.Install);
        case NpmCommand.Publish:
            return npmPublish.run(packagingLocation);
        case NpmCommand.Custom:
            return npmCustom.run(packagingLocation);
        default:
            tl.setResult(tl.TaskResult.Failed, tl.loc('UnknownCommand', command));
            return;
    }
}

                .then(packageMetadata => {
                    var fileMetadatas: any[] = packageMetadata.files;
                    tl.debug("Found " + fileMetadatas.length + " files in this package.");
                    var filteredFileList: Set<string> = this.filterFilesMinimatch(fileMetadatas);
                    tl.debug(filteredFileList.size + " files match filter criteria.");

                    var pkgFileUrlPromises: Promise<Map<string, PackageFileResult>>[] = [];

                    for (let i = 0; i < fileMetadatas.length; i++) {
                        if (filteredFileList.has(fileMetadatas[i].name)) {
                            const fileMetadata = fileMetadatas[i];
                            pkgFileUrlPromises.push(
                                fileMetadata.protocolMetadata.data.storageId != null
                                    ? this.getPackageFileDownloadUrl(feedId, project, packageMetadata, fileMetadata)
                                    : this.getPackageFileContent(fileMetadata)
                            );
                        }
                    }
                    return Promise.all(pkgFileUrlPromises)
                        .then(urls => {
                            var downloadUrls = new Map<string, PackageFileResult>();
                            urls.forEach(url => {
                                downloadUrls = { ...downloadUrls, ...url };
                            });
                            return resolve(downloadUrls);
                        })
                        .catch(error => {
                            throw error;
                        });
                })

function updateRunSettingsWithDataCollector(result: any, dataCollectorFriendlyName: string, dataCollectorNodeToAdd) {
    if (!result.RunSettings) {
        tl.debug('Updating runsettings file from RunSettings node');
        result.RunSettings = { DataCollectionRunSettings: { DataCollectors: dataCollectorNodeToAdd } };
    } else if (!result.RunSettings.DataCollectionRunSettings) {
        tl.debug('Updating runsettings file from DataCollectionSettings node');
        result.RunSettings.DataCollectionRunSettings = { DataCollectors: dataCollectorNodeToAdd };
    } else if (!result.RunSettings.DataCollectionRunSettings[0].DataCollectors) {
        tl.debug('Updating runsettings file from DataCollectors node');
        result.RunSettings.DataCollectionRunSettings[0] = { DataCollectors: dataCollectorNodeToAdd };
    } else {
        var dataCollectorArray;
        dataCollectorArray = result.RunSettings.DataCollectionRunSettings[0].DataCollectors[0].DataCollector; 
        if (!dataCollectorArray) {
            tl.debug('Updating runsettings file from DataCollectors node');
            result.RunSettings.DataCollectionRunSettings[0] = { DataCollectors: dataCollectorNodeToAdd };
        } else {
            if (!isDataCollectorPresent(dataCollectorArray, dataCollectorFriendlyName)) {
                tl.debug('Updating runsettings file, adding a DataCollector node');
                dataCollectorArray.push(dataCollectorNodeToAdd[0].DataCollector[0]);
            }
        }
    }
    return result;
}

export function getVSTestConsolePath(versionLowerLimit : string, versionUpperLimit : string): string {
    let vswhereTool = tl.tool(path.join(__dirname, 'vswhere.exe'));

    console.log(tl.loc('LookingForVsInstalltion'));
    vswhereTool.line(`-version [${versionLowerLimit},${versionUpperLimit}) -latest -products * -requires Microsoft.VisualStudio.PackageGroup.TestTools.Core -property installationPath`);
    let vsPath = vswhereTool.execSync({ silent: true } as tr.IExecSyncOptions).stdout;
    vsPath = utils.Helper.trimString(vsPath);
    if (!utils.Helper.isNullOrWhitespace(vsPath)) {
        tl.debug('Visual Studio 15.0 or higher installed path: ' + vsPath);
        return vsPath;
    }

    // look for build tool installation if full VS not present
    console.log(tl.loc('LookingForBuildToolsInstalltion'));
    vswhereTool = tl.tool(path.join(__dirname, 'vswhere.exe'));
    vswhereTool.line(`-version [${versionLowerLimit},${versionUpperLimit}) -latest -products * -requires Microsoft.VisualStudio.Component.TestTools.BuildTools -property installationPath`);
    vsPath = vswhereTool.execSync({ silent: true } as tr.IExecSyncOptions).stdout;
    vsPath = utils.Helper.trimString(vsPath);
    if (!utils.Helper.isNullOrWhitespace(vsPath)) {
        tl.debug('Build tools installed path: ' + vsPath);
        return vsPath;
    }

    return null;
}

function updateRunSettingsWithCodeCoverageDetails(result: any, codeCoverageNode: any, settingsFile: string) {
    if (!result.RunSettings) {
        tl.debug('Updating runsettings file from RunSettings node');
        result.RunSettings = { DataCollectionRunSettings: { DataCollectors: codeCoverageNode } };
    } else if (!result.RunSettings.DataCollectionRunSettings) {
        tl.debug('Updating runsettings file from DataCollectionSettings node');
        result.RunSettings.DataCollectionRunSettings = { DataCollectors: codeCoverageNode };
    } else if (!result.RunSettings.DataCollectionRunSettings[0].DataCollectors) {
        tl.debug('Updating runsettings file from DataCollectors node');
        result.RunSettings.DataCollectionRunSettings[0] = { DataCollectors: codeCoverageNode };
    } else {
        var dataCollectorArray;
        dataCollectorArray = result.RunSettings.DataCollectionRunSettings[0].DataCollectors[0].DataCollector;
        if (!dataCollectorArray) {
            tl.debug('Updating runsettings file from DataCollectors node');
            result.RunSettings.DataCollectionRunSettings[0] = { DataCollectors: codeCoverageNode };
        } else {
            if (!isDataCollectorPresent(dataCollectorArray, codeCoverageFriendlyName)) {
                tl.debug('Updating runsettings file, adding a DataCollector node');
                dataCollectorArray.push(codeCoverageNode[0].DataCollector[0]);
            }
            else {
                try {
                    setUseVerifiableInstrumentationToFalse(dataCollectorArray);
                } catch (error) {
                    throw new Error(tl.loc('InvalidSettingsFile', settingsFile));
                }
            }
        }
    }
    return result;
}

function updateSettingsWithParameters(result: any, overrideParametersString: string) {
    const overrideParameters = parameterParser.parse(overrideParametersString);
    var parametersArray;
    if (result.RunSettings) {
        if (result.RunSettings.TestRunParameters && result.RunSettings.TestRunParameters[0] &&
            result.RunSettings.TestRunParameters[0].Parameter) {
            tl.debug('Overriding test run parameters for run settings.');
            parametersArray = result.RunSettings.TestRunParameters[0].Parameter;
        }
    }
    else if (result.TestSettings) {
        if (result.TestSettings.Properties && result.TestSettings.Properties[0] &&
            result.TestSettings.Properties[0].Property) {
            tl.debug('Overriding test run parameters for test settings.');
            parametersArray = result.TestSettings.Properties[0].Property;
        }
    }

    if (parametersArray) {
        parametersArray.forEach(function (parameter) {
            const key = parameter.$.Name || parameter.$.name;
            if (overrideParameters[key] && overrideParameters[key].value) {
                tl.debug('Overriding value for parameter : ' + key);
                if (parameter.$.Value) {
                    parameter.$.Value = overrideParameters[key].value;		
                } else {		
                    parameter.$.value = overrideParameters[key].value;		
                }
            }
        });
    }

    return result;
}

    private isLatestInstalledVersion(version: string): boolean {
        var pathTobeChecked = this.packageType == utils.Constants.sdk ? path.join(this.installationPath, utils.Constants.relativeSdkPath) : path.join(this.installationPath, utils.Constants.relativeRuntimePath);
        if (!tl.exist(pathTobeChecked)) {
            throw tl.loc("PathNotFoundException", pathTobeChecked);
        }

        var allEnteries: string[] = tl.ls("", [pathTobeChecked]).map(name => path.join(pathTobeChecked, name));
        var folderPaths: string[] = allEnteries.filter(element => fs.lstatSync(element).isDirectory());
        var isLatest: boolean = folderPaths.findIndex(folderPath => {
            try {
                let versionFolderName = path.basename(folderPath);
                tl.debug(tl.loc("ComparingInstalledFolderVersions", version, versionFolderName));
                return utils.versionCompareFunction(versionFolderName, version) > 0;
            }
            catch (ex) {
                // no op, folder name might not be in version format
            }
        }) < 0;

        var filePaths: string[] = allEnteries.filter(element => !fs.lstatSync(element).isDirectory());
        isLatest = isLatest && filePaths.findIndex(filePath => {
            try {
                var versionCompleteFileName = this.getVersionCompleteFileName(path.basename(filePath));
                tl.debug(tl.loc("ComparingInstalledFileVersions", version, versionCompleteFileName));
                return utils.versionCompareFunction(versionCompleteFileName, version) > 0
            }
            catch (ex) {
                // no op, file name might not be in version format
            }
        }) < 0;

        isLatest ? tl.debug(tl.loc("VersionIsLocalLatest", version, this.installationPath)) : tl.debug(tl.loc("VersionIsNotLocalLatest", version, this.installationPath));
        return isLatest;
    }

    // Installs the test platform from a custom feed provided by the user along with credentials for authentication against said feed
    public async installVsTestPlatformToolFromCustomFeed(packageSource: string, versionSelectorInput: string, testPlatformVersion: string, username: string, password: string) {
        let tempConfigFilePath = null;
        try {
            try {
                if (!helpers.isNullEmptyOrUndefined(password)) {
                    tl.debug('Attempting to write feed details along with provided credentials to temporary config file.');
                    tempConfigFilePath = helpers.GenerateTempFile(`${uuid.v1()}.config`);
                    const feedId = uuid.v1();
                    this.prepareNugetConfigFile(packageSource, tempConfigFilePath, username, password, feedId);
                    packageSource = feedId;
                    ci.addToConsolidatedCi('passwordProvided', 'true');
                    ci.addToConsolidatedCi('usernameProvided', `${!helpers.isNullEmptyOrUndefined(username)}`);
                } else {
                    packageSource = tl.getInput(constants.customFeed);
                    tl.debug(`Credentials were not provided. Skipping writing to config file. Will use custom package feed provided by user ${packageSource}`);
                }
            } catch (error) {
                tl.error(error);
                console.log(tl.loc('LatestStableCached'));
                // Look for the latest stable version available in the cache as a fallback.
                testPlatformVersion = 'x';
                tempConfigFilePath = null;
            }

            await this.installVsTestPlatformToolFromSpecifiedFeed(packageSource, testPlatformVersion, versionSelectorInput, tempConfigFilePath);

        } finally {
            helpers.cleanUpTempConfigFile(tempConfigFilePath);
        }
    }

async function getAdvinst(version: string, license: string): Promise<void> {

  if (!semvish.valid(version))
    throw Error(taskLib.loc("AI_InvalidVersionFormat", version));

  let cachedToolRoot: string;
  //Verify if this version of advinst was already installed.
  cachedToolRoot = _getLocalTool(semvish.clean(version));

  if (!cachedToolRoot) {
    console.log(taskLib.loc("AI_InstallNewTool"));
    //Extract advinst.msi and cache the content.
    cachedToolRoot = await acquireAdvinst(version);
  }
  else {
    console.log(taskLib.loc("AI_UseCachedTool", cachedToolRoot));
  }

  let msBuildTargetsPath: string = path.join(cachedToolRoot, advinstMSBuildTargetsSubPath);
  //Compute the actual AdvancedInstaller.com folder
  let advinstBinRoot: string = path.join(cachedToolRoot, advinstToolSubPath);
  //Debug traces
  taskLib.debug('cachedToolRoot = ' + cachedToolRoot);
  taskLib.debug('advinstBinRoot = ' + advinstBinRoot);
  taskLib.debug('msBuildTargetsPath = ' + msBuildTargetsPath);

  //Register advinst if a license key was provided
  await registerAdvinst(advinstBinRoot, license);
  //Add the advinst folder to PATH
  toolLib.prependPath(advinstBinRoot);

  //Set the environment variables that will be used by Advanced Installer tasks later on.
  taskLib.setVariable(advinstMSBuildTargetsVar, msBuildTargetsPath);
  taskLib.setVariable(advinstToolRootVar, cachedToolRoot);
}