path := "/var/log/messages" // a single file
path := "/usr/local/myapp/logs/" // a directory
path = "C:\\Program Files\\MyApp\\logs\\*.log" // or a file wildcard

// parse the path glob
parsedGlob, err := glob.Parse(path)
if err != nil {
    panic(fmt.Sprintf("%q: failed to parse glob: %q", parsedGlob, err))
}

// startup a logrus logger
logger := logrus.New()

// startup the file tailer. RunFileTailer can take many path globs
tailer, err := fswatcher.RunFileTailer([]glob.Glob{parsedGlob}, false, true, logger)

// listen to the go channel for captured lines and do something with them
for line := range tailer.Lines() {
    // line.Line contains the line contents
    // line.File contains the name of the file that the line was grabbed from
    DoSomethingWithLine(line.File, line.Line)
}

// specify how often you want the tailer to check for updates
pollInterval := time.Duration(500 * time.Millisecond)

// startup the polling file tailer
tailer, err := fswatcher.RunPollingFileTailer([]glob.Glob{parsedGlob}, false, true, pollInterval, logger)

// listen to the go channel for captured lines and do something with them
for line := range tailer.Lines() {
    DoSomethingWithLine(line.File, line.Line)
}