func Watcher(c context.Context, task func(string), globs ...string) {
files, err := glob.Glob(globs...)
if err != nil {
c.Error(err)
return
}
// Create some channels
f := make(fileNameChan)
e := make(errorChan)
for matchpair := range files {
monitorFile(matchpair.Name, f, e)
}
go func() {
for {
select {
case fn := <-f:
task(fn)
case err := <-e:
c.Error(err)
}
}
}()
}
//Src returns a channel of gonzo.Files that match the provided patterns.
//TODO: ADD support for prefix to avoid all the util.Trims
func Src(ctx context.Context, globs ...string) gonzo.Pipe {
ctx, cancel := context.WithCancel(ctx)
files := make(chan gonzo.File)
pipe := gonzo.NewPipe(ctx, files)
//TODO: Parse globs here, check for invalid globs, split them into "filters".
go func() {
var err error
defer close(files)
fileslist, err := glob.Glob(globs...)
if err != nil {
ctx.Error(err)
return
}
for mp := range fileslist {
var (
file gonzo.File
base = glob.Dir(mp.Glob)
name = mp.Name
)
file, err = Read(mp.Name)
ctx = context.WithValue(ctx, "file", name)
if err == ErrIsDir {
ctx.Warn("fs.Src Ignored Directory.")
continue
}
if err != nil {
cancel()
ctx.Error(err)
return
}
file.FileInfo().SetBase(base)
file.FileInfo().SetName(name)
files <- file
}
}()
return pipe
}
func makestage(stage Stage, ctx context.Context, in <-chan File) Pipe {
out := make(chan File)
next, cancel := context.WithCancel(ctx)
go func() {
err := stage(ctx, in, out)
close(out)
if err != nil {
cancel()
ctx.Error(err)
}
}()
return pipe{files: out, context: next}
}
func Watcher(ctx context.Context, cb func(string), globs ...string) error {
files, err := glob.Glob(globs...)
if err != nil {
return err
}
w, err := fsnotify.NewWatcher()
if err != nil {
return err
}
for matchpair := range files {
w.Add(matchpair.Name)
}
throttled := throttle(50 * time.Millisecond)
go func() {
for {
select {
case event := <-w.Events:
//if event.Op&fsnotify.Write == fsnotify.Write {
//event.Op&fsnotify.Create == fsnotify.Create ||
throttled(func() {
cb(event.Name)
})
//}
case err := <-w.Errors:
if err != nil {
ctx.Error(err)
}
case <-ctx.Done():
w.Close()
return
}
}
}()
return nil
}
// Gets the list of urls and passes the results to output channel.
// It reports the progress to the Context using a ReadProgress proxy.
func Get(ctx context.Context, urls ...string) gonzo.Pipe {
ctx, cancel := context.WithCancel(ctx)
out := make(chan gonzo.File)
client := &http.Client{}
go func() {
defer close(out)
for _, url := range urls {
if url == "" {
ctx.Error("Empty URL.")
cancel()
return
}
select {
case <-ctx.Done():
ctx.Warn(context.Canceled)
return
default:
ctx.Infof("Downloading %s", url)
file, err := get(ctx, client, url)
if err != nil {
ctx.Error(err)
cancel()
break
}
//TODO: Add progress meter.
//s, _ := file.Stat()
//file.Reader = c.ReadProgress(file.Reader, "Downloading "+file.Path, s.Size())
out <- file
}
}
}()
return gonzo.NewPipe(ctx, out)
}