export function isFileExists(path: string): boolean {
    try {
        return tl.stats(path).isFile();
    } catch (error) {
        return false;
    }
}

function pathExistsAsFile(path: string) {
    try {
        return tl.stats(path).isFile();
    }
    catch (error) {
        return false;
    }
}

 filesList.forEach(packageFile => {
     if (!tl.stats(packageFile).isFile()) {
         throw new Error(tl.loc("NotARegularFile", packageFile));
     }
 });

 filesList = filesList.filter(x => tl.stats(x).isFile());

 filesList = filesList.filter((x) => tl.stats(x).isFile() || tl.stats(x).isDirectory());

async function run() {
    let sshHelper: SshHelper;
    try {
        tl.setResourcePath(path.join(__dirname, 'task.json'));

        // read SSH endpoint input
        const sshEndpoint = tl.getInput('sshEndpoint', true);
        const username: string = tl.getEndpointAuthorizationParameter(sshEndpoint, 'username', false);
        const password: string = tl.getEndpointAuthorizationParameter(sshEndpoint, 'password', true); //passphrase is optional
        const privateKey: string = process.env['ENDPOINT_DATA_' + sshEndpoint + '_PRIVATEKEY']; //private key is optional, password can be used for connecting
        const hostname: string = tl.getEndpointDataParameter(sshEndpoint, 'host', false);
        let port: string = tl.getEndpointDataParameter(sshEndpoint, 'port', true); //port is optional, will use 22 as default port if not specified
        if (!port) {
            tl._writeLine(tl.loc('UseDefaultPort'));
            port = '22';
        }

        // set up the SSH connection configuration based on endpoint details
        let sshConfig;
        if (privateKey) {
            tl.debug('Using private key for ssh connection.');
            sshConfig = {
                host: hostname,
                port: port,
                username: username,
                privateKey: privateKey,
                passphrase: password
            }
        } else {
            // use password
            tl.debug('Using username and password for ssh connection.');
            sshConfig = {
                host: hostname,
                port: port,
                username: username,
                password: password
            }
        }

        // contents is a multiline input containing glob patterns
        const contents: string[] = tl.getDelimitedInput('contents', '\n', true);
        const sourceFolder: string = tl.getPathInput('sourceFolder', true, true);
        let targetFolder: string = tl.getInput('targetFolder');

        if (!targetFolder) {
            targetFolder = "./";
        } else {
            // '~/' is unsupported
            targetFolder = targetFolder.replace(/^~\//, "./");
        }

        // read the copy options
        const cleanTargetFolder: boolean = tl.getBoolInput('cleanTargetFolder', false);
        const overwrite: boolean = tl.getBoolInput('overwrite', false);
        const failOnEmptySource: boolean = tl.getBoolInput('failOnEmptySource', false);
        const flattenFolders: boolean = tl.getBoolInput('flattenFolders', false);

        if (!tl.stats(sourceFolder).isDirectory()) {
            throw tl.loc('SourceNotFolder');
        }

        // initialize the SSH helpers, set up the connection
        sshHelper = new SshHelper(sshConfig);
        await sshHelper.setupConnection();

        if (cleanTargetFolder) {
            tl._writeLine(tl.loc('CleanTargetFolder', targetFolder));
            const cleanTargetFolderCmd = 'rm -rf "' + targetFolder + '"/*';
            try {
                await sshHelper.runCommandOnRemoteMachine(cleanTargetFolderCmd, null);
            } catch (err) {
                throw tl.loc('CleanTargetFolderFailed', err);
            }
        }

        // identify the files to copy
        const filesToCopy: string[] = getFilesToCopy(sourceFolder, contents);

        // copy files to remote machine
        if (filesToCopy) {
            tl.debug('Number of files to copy = ' + filesToCopy.length);
            tl.debug('filesToCopy = ' + filesToCopy);

            let failureCount = 0;
            tl._writeLine(tl.loc('CopyingFiles', filesToCopy.length));
            for (const fileToCopy of filesToCopy) {
                try {
                    tl.debug('fileToCopy = ' + fileToCopy);

                    let relativePath;
                    if (flattenFolders) {
                        relativePath = path.basename(fileToCopy);
                    } else {
                        relativePath = fileToCopy.substring(sourceFolder.length)
                            .replace(/^\\/g, "")
                            .replace(/^\//g, "");
                    }
                    tl.debug('relativePath = ' + relativePath);
                    const targetPath = path.posix.join(targetFolder, relativePath);

//.........这里部分代码省略.........

// This method will find the list of matching files for the specified contents
// This logic is the same as the one used by CopyFiles task except for allowing dot folders to be copied
// This will be useful to put in the task-lib
function getFilesToCopy(sourceFolder: string, contents: string[]): string[] {
    // include filter
    const includeContents: string[] = [];
    // exclude filter
    const excludeContents: string[] = [];

    // evaluate leading negations `!` on the pattern
    for (const pattern of contents.map(x => x.trim())) {
        let negate: boolean = false;
        let numberOfNegations: number = 0;
        for (const c of pattern) {
            if (c === '!') {
                negate = !negate;
                numberOfNegations++;
            } else {
                break;
            }
        }

        if (negate) {
            tl.debug('exclude content pattern: ' + pattern);
            const realPattern = pattern.substring(0, numberOfNegations) + path.join(sourceFolder, pattern.substring(numberOfNegations));
            excludeContents.push(realPattern);
        } else {
            tl.debug('include content pattern: ' + pattern);
            const realPattern = path.join(sourceFolder, pattern);
            includeContents.push(realPattern);
        }
    }

    // enumerate all files
    let files: string[] = [];
    const allPaths: string[] = tl.find(sourceFolder);
    const allFiles: string[] = [];

    // remove folder path
    for (const p of allPaths) {
        if (!tl.stats(p).isDirectory()) {
            allFiles.push(p);
        }
    }

    // if we only have exclude filters, we need add a include all filter, so we can have something to exclude.
    if (includeContents.length === 0 && excludeContents.length > 0) {
        includeContents.push('**');
    }

    tl.debug("counted " + allFiles.length + " files in the source tree");

    // a map to eliminate duplicates
    const pathsSeen = {};

    // minimatch options
    const matchOptions: tl.MatchOptions = { matchBase: true, dot: true };
    if (os.platform() === 'win32') {
        matchOptions.nocase = true;
    }

    // apply include filter
    for (const pattern of includeContents) {
        tl.debug('Include matching ' + pattern);

        // let minimatch do the actual filtering
        const matches: string[] = tl.match(allFiles, pattern, matchOptions);

        tl.debug('Include matched ' + matches.length + ' files');
        for (const matchPath of matches) {
            if (!pathsSeen.hasOwnProperty(matchPath)) {
                pathsSeen[matchPath] = true;
                files.push(matchPath);
            }
        }
    }

    // apply exclude filter
    for (const pattern of excludeContents) {
        tl.debug('Exclude matching ' + pattern);

        // let minimatch do the actual filtering
        const matches: string[] = tl.match(files, pattern, matchOptions);

        tl.debug('Exclude matched ' + matches.length + ' files');
        files = [];
        for (const matchPath of matches) {
            files.push(matchPath);
        }
    }

    return files;
}

 filesList.forEach(solutionFile => {
     if (!tl.stats(solutionFile).isFile()) {
         throw new Error(tl.loc("NotARegularFile", solutionFile));
     }
 });

export function pathExistsAsDirectory(path: string) {
    return tl.exist(path) && tl.stats(path).isDirectory();
}

export function pathExistsAsFile(path: string) {
    return tl.exist(path) && tl.stats(path).isFile();
}