Add log passthrough for lock-exec

Creates multiwriter with a single buffer (combined output) and
std IO file descriptors

Author: JoshStern

lock/run.go

@@ -1,8 +1,11 @@
 package lock
 
 import (
+	"bytes"
 	"context"
 	"fmt"
+	"io"
+	"os"
 	"os/exec"
 	"strings"
 	"time"
@@ -20,8 +23,17 @@ func (c *Client) Run(ctx context.Context, key, command string) (string, error) {
 		return "", fmt.Errorf("lock failed: %w", err)
 	}
 
+	// Build command
 	fields := strings.Fields(command)
-	cmdout, cmderr := exec.CommandContext(ctx, fields[0], fields[1:]...).CombinedOutput() //nolint:gosec
+	cmd := exec.CommandContext(ctx, fields[0], fields[1:]...) //nolint:gosec
+
+	// Write to std outputs + combined buffer
+	var outbuf bytes.Buffer
+	cmd.Stdout = io.MultiWriter(os.Stdout, &outbuf)
+	cmd.Stderr = io.MultiWriter(os.Stderr, &outbuf)
+
+	cmderr := cmd.Run()
+	cmdout := outbuf.Bytes()
 
 	return strings.TrimSpace(string(cmdout)), cmderr
 }