feat: add remove command to remove a backend AI provider (#395)

* feat: add remove command to remove a backend AI provider

Signed-off-by: Matthis Holleville <matthish29@gmail.com>

* Update cmd/auth/remove.go

Co-authored-by: Alex Jones <alex@k8sgpt.ai>
Signed-off-by: Matthis <99146727+matthisholleville@users.noreply.github.com>

* feat: update Long remove command

Signed-off-by: Matthis Holleville <matthish29@gmail.com>

---------

Signed-off-by: Matthis Holleville <matthish29@gmail.com>
Signed-off-by: Matthis <99146727+matthisholleville@users.noreply.github.com>
Co-authored-by: Alex Jones <alex@k8sgpt.ai>

README.md

@@ -232,6 +232,12 @@ _List configured backends_
 k8sgpt auth list
 ```
 
+_Remove configured backends_
+
+```
+k8sgpt auth remove --backend $MY_BACKEND
+```
+
 _List integrations_
 
 ```

cmd/auth/auth.go

@@ -46,4 +46,6 @@ func init() {
 	AuthCmd.AddCommand(listCmd)
 	// add subcommand to create new backend provider
 	AuthCmd.AddCommand(newCmd)
+	// add subcommand to remove new backend provider
+	AuthCmd.AddCommand(removeCmd)
 }

cmd/auth/remove.go

@@ -0,0 +1,59 @@
+/*
+Copyright 2023 The K8sGPT 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 auth
+
+import (
+	"os"
+
+	"github.com/fatih/color"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var removeCmd = &cobra.Command{
+	Use:   "remove",
+	Short: "Remove a provider",
+	Long:  "The command to remove an AI backend provider",
+	Run: func(cmd *cobra.Command, args []string) {
+		err := viper.UnmarshalKey("ai", &configAI)
+		if err != nil {
+			color.Red("Error: %v", err)
+			os.Exit(1)
+		}
+
+		foundBackend := false
+		for i, provider := range configAI.Providers {
+			if backend == provider.Name {
+				foundBackend = true
+				configAI.Providers = append(configAI.Providers[:i], configAI.Providers[i+1:]...)
+				break
+			}
+		}
+		if !foundBackend {
+			color.Red("Error: %s does not exist in configuration file. Please use k8sgpt auth new.", backend)
+			os.Exit(1)
+		}
+		viper.Set("ai", configAI)
+		if err := viper.WriteConfig(); err != nil {
+			color.Red("Error writing config file: %s", err.Error())
+			os.Exit(1)
+		}
+
+	},
+}
+
+func init() {
+	// add flag for backend
+	removeCmd.Flags().StringVarP(&backend, "backend", "b", "openai", "Backend AI provider")
+}