export async function downloadUniversalPackage(
    downloadPath: string,
    feedId: string,
    packageId: string,
    version: string,
    filterPattern: string
): Promise<void> {
    try {
        const accessToken = pkgLocationUtils.getSystemAccessToken();
        let serviceUri = tl.getEndpointUrl("SYSTEMVSSCONNECTION", false);
        const blobUri = await pkgLocationUtils.getBlobstoreUriFromBaseServiceUri(serviceUri, accessToken);

        // Finding the artifact tool directory
        var artifactToolPath = await artifactToolUtilities.getArtifactToolFromService(
            blobUri,
            accessToken,
            "artifacttool"
        );

        const feedUri = await pkgLocationUtils.getFeedUriFromBaseServiceUri(serviceUri, accessToken);
        let packageName: string = await artifactToolUtilities.getPackageNameFromId(
            feedUri,
            accessToken,
            feedId,
            packageId
        );

        tl.debug(tl.loc("Info_UsingArtifactToolDownload"));

        const downloadOptions = {
            artifactToolPath,
            feedId,
            accountUrl: serviceUri,
            packageName,
            packageVersion: version
        } as artifactToolRunner.IArtifactToolOptions;

        let toolRunnerOptions = artifactToolRunner.getOptions();
        toolRunnerOptions.env.UNIVERSAL_DOWNLOAD_PAT = accessToken;
        downloadPackageUsingArtifactTool(downloadPath, downloadOptions, toolRunnerOptions, filterPattern);
    } catch (error) {
        tl.setResult(tl.TaskResult.Failed, error.message);
        return;
    } finally {
        _logUniversalStartupVariables({
            ArtifactToolPath: artifactToolPath,
            PackageType: "Universal",
            FeedId : feedId,
            PackageId: packageId,
            Version: version,
            IsTriggeringArtifact: tl.getInput("isTriggeringArtifact")
        });
    }
}

async function main(): Promise<void> {
    tl.setResourcePath(path.join(__dirname, "task.json"));

    // Getting artifact tool
    tl.debug("Getting artifact tool");
    let artifactToolPath: string;

    try {
        const serverType = tl.getVariable("System.ServerType");
        if (!serverType || serverType.toLowerCase() !== "hosted"){
            throw new Error(tl.loc("Error_UniversalPackagesNotSupportedOnPrem"));
        }

        const localAccessToken = pkgLocationUtils.getSystemAccessToken();
        const serviceUri = tl.getEndpointUrl("SYSTEMVSSCONNECTION", false);
        const blobUri = await pkgLocationUtils.getBlobstoreUriFromBaseServiceUri(
            serviceUri,
            localAccessToken);

        // Finding the artifact tool directory
        artifactToolPath = await artifactToolUtilities.getArtifactToolFromService(
            blobUri,
            localAccessToken,
            "artifacttool");
    }
    catch (error) {
        tl.setResult(tl.TaskResult.Failed, tl.loc("FailedToGetArtifactTool", error.message));
        return;
    } finally{
        _logUniversalStartupVariables(artifactToolPath);
    }
    // Calling the command. download/publish
    const universalPackageCommand = tl.getInput("command", true);
    switch (universalPackageCommand) {
        case "download":
            universalDownload.run(artifactToolPath);
            break;
        case "publish":
            universalPublish.run(artifactToolPath);
            break;
        default:
            tl.setResult(tl.TaskResult.Failed, tl.loc("Error_CommandNotRecognized", universalPackageCommand));
            break;
    }
}

export async function run(artifactToolPath: string): Promise<void> {
    const buildIdentityDisplayName: string = null;
    const buildIdentityAccount: string = null;
    try {
        // Get directory to publish
        const publishDir: string = tl.getInput("publishDirectory");
        if (publishDir.length < 1)
        {
            tl.debug(tl.loc("Info_PublishDirectoryNotFound"));
            return;
        }

        let serviceUri: string;
        let feedId: string;
        let packageName: string;
        let version: string;
        let accessToken: string;
        let feedUri: string;
        const publishedPackageVar: string = tl.getInput("publishedPackageVar");
        const versionRadio = tl.getInput("versionPublishSelector");

        // Feed Auth
        let feedType = tl.getInput("internalOrExternalPublish") || "internal";

        const normalizedFeedType = ["internal", "external"].find((x) =>
            feedType.toUpperCase() === x.toUpperCase());
        if (!normalizedFeedType) {
            throw new Error(tl.loc("UnknownFeedType", feedType));
        }
        feedType = normalizedFeedType;

        let internalAuthInfo: auth.InternalAuthInfo;

        const toolRunnerOptions = artifactToolRunner.getOptions();

        let sessionId: string;

        if (feedType === "internal")
        {
            // getting inputs
            serviceUri = tl.getEndpointUrl("SYSTEMVSSCONNECTION", false);

            packageName = tl.getInput("packageListPublish");
            feedId = tl.getInput("feedListPublish");

            // Setting up auth info
            accessToken = pkgLocationUtils.getSystemAccessToken();
            internalAuthInfo = new auth.InternalAuthInfo([], accessToken);

            toolRunnerOptions.env.UNIVERSAL_PUBLISH_PAT = internalAuthInfo.accessToken;

            let packagingLocation: string;
            try {
                // This call is to get the packaging URI(abc.pkgs.vs.com) which is same for all protocols.
                packagingLocation = await pkgLocationUtils.getNuGetUriFromBaseServiceUri(
                    serviceUri,
                    accessToken);
            } catch (error) {
                tl.debug(JSON.stringify(error));
                packagingLocation = serviceUri;
            }

            const pkgConn = pkgLocationUtils.getWebApiWithProxy(packagingLocation, accessToken);
            sessionId = await ProvenanceHelper.GetSessionId(
                feedId,
                null,
                "upack", /* must match protocol name on the server */
                pkgConn.serverUrl,
                [pkgConn.authHandler],
                pkgConn.options);
        }
        else {
            const externalAuthInfo = auth.GetExternalAuthInfo("externalEndpoints");
            if (!externalAuthInfo)
            {
                tl.setResult(tl.TaskResult.Failed, tl.loc("Error_NoSourceSpecifiedForPublish"));
                return;
            }

            serviceUri = externalAuthInfo.packageSource.accountUrl;

            feedId = tl.getInput("feedPublishExternal");
            packageName = tl.getInput("packagePublishExternal");

            // Assuming only auth via PAT works for now
            accessToken = (externalAuthInfo as auth.TokenExternalAuthInfo).token;
            toolRunnerOptions.env.UNIVERSAL_PUBLISH_PAT = accessToken;
        }

        if (versionRadio === "custom"){
            version = tl.getInput("versionPublish");
        }
        else{
            feedUri = await pkgLocationUtils.getFeedUriFromBaseServiceUri(serviceUri, accessToken);

            const highestVersion = await artifactToolUtilities.getHighestPackageVersionFromFeed(
                feedUri,
                accessToken,
                feedId,
                packageName);
//.........这里部分代码省略.........

async function main(): Promise<void> {
    tl.setResourcePath(path.join(__dirname, "task.json"));

    try {
        let packagingLocation: string;

        let pipEnvVar: string = "";
        if (tl.getVariable("PIP_EXTRA_INDEX_URL")) {
            pipEnvVar = tl.getVariable("PIP_EXTRA_INDEX_URL");
        }

        const feedIds  = tl.getDelimitedInput("feedList", ",");
        const serverType = tl.getVariable("System.ServerType");

        // Local feeds
        if (feedIds)
        {
            if (!serverType || serverType.toLowerCase() !== "hosted"){
                throw new Error(tl.loc("Error_PythonInternalFeedsNotSupportedOnprem"));
            }
            tl.debug(tl.loc("Info_AddingInternalFeeds", feedIds.length));
            const serviceUri = tl.getEndpointUrl("SYSTEMVSSCONNECTION", false);
            const localAccessToken = pkgLocationUtils.getSystemAccessToken();
            try {
                // This call is to get the packaging URI(abc.pkgs.vs.com) which is same for all protocols.
                packagingLocation = await pkgLocationUtils.getNuGetUriFromBaseServiceUri(
                    serviceUri,
                    localAccessToken);
            } catch (error) {
                tl.debug(tl.loc("FailedToGetPackagingUri"));
                tl.debug(JSON.stringify(error));
                packagingLocation = serviceUri;
            }

            for (const feedId of feedIds) {
                const feedUri = await pkgLocationUtils.getFeedRegistryUrl(
                    packagingLocation, 
                    pkgLocationUtils.RegistryType.PyPiSimple, 
                    feedId,
                    null,
                    localAccessToken);
                const pipUri = utils.formPipCompatibleUri("build", localAccessToken, feedUri);
                pipEnvVar = pipEnvVar + " " + pipUri;
            }
        }

        // external service endpoints
        let endpointNames = tl.getDelimitedInput("externalSources", ',');

        const externalEndpoints = auth.getExternalAuthInfoArray(endpointNames);
        externalEndpoints.forEach((id) => {
            const externalPipUri = utils.formPipCompatibleUri(id.username, id.password, id.packageSource.feedUri);
            pipEnvVar = pipEnvVar + " " + externalPipUri;
        });

        // Setting variable
        tl.setVariable("PIP_EXTRA_INDEX_URL", pipEnvVar, false);
        console.log(tl.loc("Info_SuccessAddingAuth", feedIds.length, externalEndpoints.length));

        const pipauthvar = tl.getVariable("PIP_EXTRA_INDEX_URL");
        if (pipauthvar.length < pipEnvVar.length){
            tl.warning(tl.loc("Warn_TooManyFeedEntries"));
        }
        tl.debug(pipEnvVar);
    }
    catch (error) {
        tl.error(error);
        tl.setResult(tl.TaskResult.Failed, tl.loc("FailedToAddAuthentication"));
        return;
    } finally{
        _logPipAuthStartupVariables();
    }
}

export async function run(artifactToolPath: string): Promise<void> {
    let buildIdentityDisplayName: string = null;
    let buildIdentityAccount: string = null;
    try {
        // Get directory to publish
        let downloadDir: string = tl.getInput("downloadDirectory");
        if (downloadDir.length < 1)
        {
            tl.warning(tl.loc("Info_DownloadDirectoryNotFound"));
            return;
        }

        let serviceUri: string;
        let feedId: string;
        let packageName: string;
        let version: string;

        // Feed Auth
        let feedType = tl.getInput("internalOrExternalDownload") || "internal";

        const normalizedFeedType = ["internal", "external"].find((x) =>
            feedType.toUpperCase() === x.toUpperCase());
        if (!normalizedFeedType) {
            throw new Error(tl.loc("UnknownFeedType", feedType));
        }
        feedType = normalizedFeedType;

        let internalAuthInfo: auth.InternalAuthInfo;

        let toolRunnerOptions = artifactToolRunner.getOptions();

        if (feedType === "internal")
        {
            // getting inputs
            serviceUri = tl.getEndpointUrl("SYSTEMVSSCONNECTION", false);

            feedId = tl.getInput("feedListDownload");

            // Getting package name from package Id
            const packageId = tl.getInput("packageListDownload");
            const accessToken = pkgLocationUtils.getSystemAccessToken();

            internalAuthInfo = new auth.InternalAuthInfo([], accessToken);

            const feedUri = await pkgLocationUtils.getFeedUriFromBaseServiceUri(serviceUri, accessToken);
            packageName = await artifactToolUtilities.getPackageNameFromId(feedUri, accessToken, feedId, packageId);

            version = tl.getInput("versionListDownload");

            toolRunnerOptions.env.UNIVERSAL_DOWNLOAD_PAT = internalAuthInfo.accessToken;
        }
        else {
            let externalAuthInfo = auth.GetExternalAuthInfo("externalEndpoint");

            if (!externalAuthInfo)
            {
                tl.setResult(tl.TaskResult.Failed, tl.loc("Error_NoSourceSpecifiedForDownload"));
                return;
            }

            serviceUri = externalAuthInfo.packageSource.accountUrl;
            feedId = tl.getInput("feedDownloadExternal");
            packageName = tl.getInput("packageDownloadExternal");
            version = tl.getInput("versionDownloadExternal");

            // Assuming only auth via PAT works for now
            const tokenAuth = externalAuthInfo as auth.TokenExternalAuthInfo;
            toolRunnerOptions.env.UNIVERSAL_DOWNLOAD_PAT = tokenAuth.token;
        }

        tl.debug(tl.loc("Info_UsingArtifactToolDownload"));

        const downloadOptions = {
            artifactToolPath,
            feedId,
            accountUrl: serviceUri,
            packageName,
            packageVersion: version,
        } as artifactToolRunner.IArtifactToolOptions;

        downloadPackageUsingArtifactTool(downloadDir, downloadOptions, toolRunnerOptions);

        tl.setResult(tl.TaskResult.Succeeded, tl.loc("PackagesDownloadedSuccessfully"));

    } catch (err) {
        tl.error(err);

        if (buildIdentityDisplayName || buildIdentityAccount) {
            tl.warning(tl.loc("BuildIdentityPermissionsHint", buildIdentityDisplayName, buildIdentityAccount));
        }

        tl.setResult(tl.TaskResult.Failed, tl.loc("PackagesFailedToDownload"));
    }
}