new: implement the logout command

Signed-off-by: Lorenzo Susini <[email protected]>
Co-authored-by: Aldo Lacuku <[email protected]>

Author: 2 people

cmd/logout.go

@@ -0,0 +1,72 @@
+// Copyright 2022 The Falco Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+
+	"github.com/falcosecurity/falcoctl/pkg/oci"
+	"github.com/falcosecurity/falcoctl/pkg/oci/authn"
+	commonoptions "github.com/falcosecurity/falcoctl/pkg/options"
+)
+
+type logoutOptions struct {
+	*commonoptions.CommonOptions
+	hostname string
+}
+
+// Validate validates the `list` command options.
+func (o *logoutOptions) Validate(args []string) error {
+	if len(args) != 0 {
+		o.hostname = args[0]
+	} else {
+		o.hostname = oci.DefaultRegistry
+	}
+	return nil
+}
+
+// NewLogoutCmd returns the logout command.
+func NewLogoutCmd(opt *commonoptions.CommonOptions) *cobra.Command {
+	o := logoutOptions{
+		CommonOptions: opt,
+	}
+
+	cmd := &cobra.Command{
+		Use:                   "logout hostname",
+		DisableFlagsInUseLine: true,
+		Short:                 "Logout from an OCI registry",
+		Long:                  "Logout from an OCI registry",
+		Args:                  cobra.MaximumNArgs(1),
+		PreRun: func(cmd *cobra.Command, args []string) {
+			o.Printer.CheckErr(o.Validate(args))
+		},
+		Run: func(cmd *cobra.Command, args []string) {
+			o.Printer.CheckErr(o.RunLogout(args))
+		},
+	}
+
+	return cmd
+}
+
+func (o *logoutOptions) RunLogout(args []string) error {
+	err := authn.Logout(o.hostname)
+	if err != nil {
+		o.Printer.Error.Println(err.Error())
+		return err
+	}
+
+	o.Printer.DefaultText.Println("Logout succeeded")
+	return nil
+}