// New returns a new Tailer, configured with the supplied Options
func New(o Options) (*Tailer, error) {
if o.Lines == nil {
return nil, errors.New("tailer needs lines")
}
fs := o.FS
if fs == nil {
fs = &afero.OsFs{}
}
w := o.W
if w == nil {
var err error
w, err = watcher.NewLogWatcher()
if err != nil {
return nil, fmt.Errorf("Couldn't create a watcher for tailer: %s", err)
}
}
t := &Tailer{
w: w,
watched: make(map[string]struct{}),
lines: o.Lines,
files: make(map[string]afero.File),
partials: make(map[string]string),
fs: fs,
}
go t.run()
return t, nil
}
// NewLoader creates a new program loader. It takes a filesystem watcher
// and a filesystem interface as arguments. If fs is nil, it will use the
// default filesystem interface.
func NewLoader(o LoaderOptions) (*Loader, error) {
if o.Store == nil || o.Lines == nil {
return nil, errors.New("loader needs a store and lines")
}
fs := o.FS
if fs == nil {
fs = &afero.OsFs{}
}
w := o.W
if w == nil {
var err error
w, err = watcher.NewLogWatcher()
if err != nil {
return nil, fmt.Errorf("Couldn't create a watcher for loader: %s", err)
}
}
l := &Loader{
w: w,
ms: o.Store,
fs: fs,
handles: make(map[string]*vmHandle),
watcherDone: make(chan struct{}),
VMsDone: make(chan struct{}),
compileOnly: o.CompileOnly,
dumpBytecode: o.DumpBytecode,
syslogUseCurrentYear: o.SyslogUseCurrentYear}
go l.processEvents()
go l.processLines(o.Lines)
return l, nil
}