lefthook stdin capture reproduction WIP for https://github.com/evilmartians/lefthook/issues/588

main.go

package main

import (
	"context"
	"io"
	"os"
	"os/exec"

	"github.com/creack/pty"
)

// internal/lefthooik/run/exec/execute_unix.go
type executeArgs struct {
	in                    io.Reader
	out                   io.Writer
	envs                  []string
	root                  string
	interactive, useStdin bool
}

func main() {
	ctx := context.Background()

	// internal/lefthook/run.go Lefthook.Run
	// ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
	// defer stop()

	// https://yourbasic.org/golang/log-to-file/
	in, err := os.OpenFile("/dev/null", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
	if err != nil {
		println(err.Error())
	}
	defer in.Close()

	// internal/lefthooik/run/exec/execute_unix.go
	command := exec.CommandContext(ctx, "sh", "-c", "sleep 2")

	command.Stdin = in

	wd, err := os.Getwd()
	if err != nil {
		panic(err)
	}

	command.Dir = wd
	command.Env = os.Environ()

	p, err := pty.Start(command)
	if err != nil {
		panic(err)
	}

	defer func() { _ = p.Close() }()

	command.Wait()
}