feat(cosmos#21726): Add NewShowUpgradeInfoCmd command

tools/cosmovisor/cmd/cosmovisor/root.go

@@ -19,6 +19,7 @@ func NewRootCmd() *cobra.Command {
 		configCmd,
 		NewVersionCmd(),
 		NewAddUpgradeCmd(),
+		NewShowUpgradeInfoCmd(),
 	)
 
 	rootCmd.PersistentFlags().StringP(cosmovisor.FlagCosmovisorConfig, "c", "", "path to cosmovisor config file")

tools/cosmovisor/cmd/cosmovisor/show_upgrade.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+func NewShowUpgradeInfoCmd() *cobra.Command {
+	showUpgradeInfo := &cobra.Command{
+		Use:          "show-upgrade-info <path to executable>",
+		Short:        "Show upgrade-info.json into stdout.",
+		SilenceUsage: true,
+		RunE:         showUpgradeInfoCmd,
+	}
+
+	return showUpgradeInfo
+}
+
+func showUpgradeInfoCmd(cmd *cobra.Command, path string) error {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return fmt.Errorf("failed to read upgrade-info.json: %w", err)
+	}
+
+	fmt.Println(string(data))
+
+	return nil
+}