Add debug logging for verify command (#610)

Signed-off-by: Daniel Weiße <dw@edgeless.systems>

cli/internal/cmd/log.go

@@ -0,0 +1,31 @@
+/*
+Copyright (c) Edgeless Systems GmbH
+
+SPDX-License-Identifier: AGPL-3.0-only
+*/
+
+package cmd
+
+import (
+	"github.com/edgelesssys/constellation/v2/internal/logger"
+	"github.com/spf13/cobra"
+	"go.uber.org/zap/zapcore"
+)
+
+type debugLog interface {
+	Debugf(format string, args ...any)
+	Sync()
+}
+
+func newCLILogger(cmd *cobra.Command) (debugLog, error) {
+	logLvl := zapcore.InfoLevel
+	debugLog, err := cmd.Flags().GetBool("debug")
+	if err != nil {
+		return nil, err
+	}
+	if debugLog {
+		logLvl = zapcore.DebugLevel
+	}
+
+	return logger.New(logger.PlainLog, logLvl), nil
+}