chore: add new interactive release package (#22624)

scripts/releaser/git.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"errors"
+	"os/exec"
+	"strings"
+)
+
+// gitOutput runs a read-only git command and returns trimmed stdout.
+func gitOutput(args ...string) (string, error) {
+	cmd := exec.Command("git", args...)
+	out, err := cmd.Output()
+	if err != nil {
+		var exitErr *exec.ExitError
+		if errors.As(err, &exitErr) {
+			return "", exitErr
+		}
+		return "", err
+	}
+	return strings.TrimSpace(string(out)), nil
+}
+
+// gitRun runs a git command with stdout/stderr connected to the
+// terminal.
+func gitRun(args ...string) error {
+	cmd := exec.Command("git", args...)
+	cmd.Stdout = nil
+	cmd.Stderr = nil
+	return cmd.Run()
+}