some changes:

- reorganized client code, using cobra subcommands
- more reorg in upd code

upctl/cmd/upload.go

@@ -0,0 +1,47 @@
+/*
+Copyright © 2023 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+package cmd
+
+import (
+	"errors"
+	"github.com/spf13/cobra"
+	"github.com/tlinden/up/upctl/cfg"
+	"github.com/tlinden/up/upctl/lib"
+)
+
+func UploadCommand(conf *cfg.Config) *cobra.Command {
+	var uploadCmd = &cobra.Command{
+		Use:   "upload [options] [file ..]",
+		Short: "upload files",
+		Long:  `Upload files to an upload api.`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if len(args) == 0 {
+				return errors.New("No files specified to upload!")
+			}
+
+			// errors at this stage do not cause the usage to be shown
+			cmd.SilenceUsage = true
+
+			return lib.Upload(conf, args)
+		},
+	}
+
+	// options
+	uploadCmd.PersistentFlags().StringVarP(&conf.Expire, "expire", "e", "", "Expire setting: asap or duration (accepted shortcuts: dmh)")
+
+	return uploadCmd
+}