Method Concat

script.go:271–280

Concat reads paths from the pipe, one per line, and produces the contents of all the corresponding files in sequence. If there are any errors (for example, non-existent files), these will be ignored, execution will continue, and the pipe's error status will not be set. This makes it convenient to w

()

// without setting the pipe's error status. This mimics the behaviour of Unix
// cat(1).
func (p *Pipe) Concat() *Pipe {
	var readers []io.Reader
	p.FilterScan(func(line string, w io.Writer) {
		input, err := os.Open(line)
		if err == nil {
			readers = append(readers, NewReadAutoCloser(input))
		}
	}).Wait()
	return p.WithReader(io.MultiReader(readers...))
}

// CountLines returns the number of lines of input, or an error.
func (p *Pipe) CountLines() (lines int, err error) {