// Package sh runs external commands with output streamed live, since a
// post-receive hook's stdout/stderr goes straight back to the pushing client.
package sh

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

func Run(ctx context.Context, out io.Writer, dir string, name string, args ...string) error {
	cmd := exec.CommandContext(ctx, name, args...)
	cmd.Dir = dir
	cmd.Stdout = out
	cmd.Stderr = out
	if err := cmd.Run(); err != nil {
		return fmt.Errorf("%s %v: %w", name, args, err)
	}
	return nil
}

// Output runs a command and returns its trimmed stdout, for callers that need
// a value back (e.g. `zfs list -H -o name`) rather than a stream.
func Output(ctx context.Context, dir string, name string, args ...string) (string, error) {
	cmd := exec.CommandContext(ctx, name, args...)
	cmd.Dir = dir
	b, err := cmd.Output()
	if err != nil {
		return "", fmt.Errorf("%s %v: %w", name, args, err)
	}
	return string(b), nil
}

// CombinedOutput runs a command and returns its combined stdout+stderr,
// even on failure - for callers that need to inspect the error text itself
// (e.g. distinguishing bmake's "no such target" from a real failure)
// rather than just pass/fail.
func CombinedOutput(ctx context.Context, dir string, name string, args ...string) (string, error) {
	cmd := exec.CommandContext(ctx, name, args...)
	cmd.Dir = dir
	b, err := cmd.CombinedOutput()
	return string(b), err
}