pager

Easy $PAGER support for Go (i.e. less(1), more(1)) with sane defaults.

By default pager uses less(1) with the args: -X -F -R --buffers=65535 and sets LESSSECURE=1 before starting less(1).

If less(1) is unavailable, pager falls back to more(1).

The PAGER environment variable is honored.

Example Usage

import (
  "fmt"

  "github.com/sean-/pager"
)

func main() {
  p, err := pager.New()
  if err != nil {
    panic(fmt.Sprintf("unable to get pager: %v", err))
  }
  defer p.Wait()

  foo(p)
}

func foo(w io.Writer) {
  fmt.Fprintf(w, "header\n")
  for i := 0; i < 1000; i++ {
    fmt.Fprintf(w, "line %03d\n", i)
  }
  fmt.Fprintf(w, "trailer\n")
}

Credit

Much of this was pulled from https://gist.github.com/dchapes/1d0c538ce07902b76c75 and reworked slightly.