abra/cli/internal/command.go

package internal

import (
	"bufio"
	"fmt"
	"os/exec"
)

// RunCmd runs a shell command and streams stdout/stderr in real-time.
func RunCmd(cmd *exec.Cmd) error {
	r, err := cmd.StdoutPipe()
	if err != nil {
		return err
	}

	cmd.Stderr = cmd.Stdout
	done := make(chan struct{})
	scanner := bufio.NewScanner(r)

	go func() {
		for scanner.Scan() {
			line := scanner.Text()
			fmt.Println(line)
		}
		done <- struct{}{}
	}()

	if err := cmd.Start(); err != nil {
		return err
	}

	<-done

	if err := cmd.Wait(); err != nil {
		return err
	}

	return nil
}