cheat/internal/display/display.go
Chris Lane 59d5c96c24 feat(pagination): implement paginated output
Implement a `pager` config option. If configured, `cheat` will
automatically pipe output through the configured pager (where
appropriate).
2020-06-25 18:21:51 -04:00

38 lines
772 B
Go

package display
import (
"fmt"
"os"
"os/exec"
"strings"
"github.com/cheat/cheat/internal/config"
)
// Display writes output either directly to stdout, or through a pager,
// depending upon configuration.
func Display(out string, conf config.Config) {
// if no pager was configured, print the output to stdout and exit
if conf.Pager == "" {
fmt.Print(out)
os.Exit(0)
}
// otherwise, pipe output through the pager
parts := strings.Split(conf.Pager, " ")
pager := parts[0]
args := parts[1:]
// run the pager
cmd := exec.Command(pager, args...)
cmd.Stdin = strings.NewReader(out)
cmd.Stdout = os.Stdout
// handle errors
err := cmd.Run()
if err != nil {
fmt.Fprintln(os.Stderr, fmt.Sprintf("failed to write to pager: %v", err))
os.Exit(1)
}
}