add shell completion command

Signed-off-by: puneeth_aditya_5656 <myakampuneeth@gmail.com>

Author: mugiwaraluffy56

README.md

@@ -66,6 +66,7 @@ microcks [command] [flags]
 | `login`      | Log in to a Microcks instance using Keycloak credentials | [`login`](documentation/cmd/login.md)           |
 | `logout`     | Log out and remove authentication from a given context   | [`logout`](documentation/cmd/logout.md)         |
 | `context`    | Manage CLI contexts (list, use, delete)                  | [`context`](documentation/cmd/context.md)       |
+| `completion` | Generate shell completion scripts                         | [`completion`](documentation/cmd/completion.md) |
 | `start`      | Start a local Microcks instance via Docker/Podman        | [`start`](documentation/cmd/start.md)           |
 | `stop`       | Stop a local Microcks instance                           | [`stop`](documentation/cmd/stop.md)             |
 | `import`     | Import API spec files from local filesystem              | [`import`](documentation/cmd/import.md)         |

cmd/cmd.go

@@ -48,6 +48,7 @@ func NewCommad() *cobra.Command {
 	command.AddCommand(NewContextCommand(&clientOpts))
 	command.AddCommand(NewLoginCommand(&clientOpts))
 	command.AddCommand(NewLogoutCommand(&clientOpts))
+	command.AddCommand(NewCompletionCommand())
 
 	defaultLocalConfigPath, err := config.DefaultLocalConfigPath()
 	errors.CheckError(err)

cmd/completion.go

@@ -0,0 +1,52 @@
+/*
+ * Copyright The Microcks 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 (
+	"fmt"
+
+	"github.com/microcks/microcks-cli/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+func NewCompletionCommand() *cobra.Command {
+	var command = &cobra.Command{
+		Use:   "completion [bash|zsh|fish|powershell]",
+		Short: "Generate shell completion scripts",
+		Long:  `Generate shell completion scripts`,
+		Args:  cobra.ExactArgs(1),
+		Run: func(cmd *cobra.Command, args []string) {
+			rootCmd := cmd.Root()
+			var err error
+
+			switch args[0] {
+			case "bash":
+				err = rootCmd.GenBashCompletion(cmd.OutOrStdout())
+			case "zsh":
+				err = rootCmd.GenZshCompletion(cmd.OutOrStdout())
+			case "fish":
+				err = rootCmd.GenFishCompletion(cmd.OutOrStdout(), true)
+			case "powershell":
+				err = rootCmd.GenPowerShellCompletion(cmd.OutOrStdout())
+			default:
+				err = fmt.Errorf("unsupported shell %q", args[0])
+			}
+			errors.CheckError(err)
+		},
+	}
+
+	return command
+}

cmd/completion_test.go

@@ -0,0 +1,38 @@
+package cmd
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewCompletionCommand(t *testing.T) {
+	cmd := NewCompletionCommand()
+
+	assert.Equal(t, "completion [bash|zsh|fish|powershell]", cmd.Use)
+	assert.Equal(t, "Generate shell completion scripts", cmd.Short)
+}
+
+func TestCompletionCommandRegistered(t *testing.T) {
+	cmd := NewCommad()
+
+	completionCmd, _, err := cmd.Find([]string{"completion"})
+
+	assert.NoError(t, err)
+	assert.NotNil(t, completionCmd)
+	assert.Equal(t, "completion", completionCmd.Name())
+}
+
+func TestCompletionCommandGeneratesBash(t *testing.T) {
+	cmd := NewCommad()
+	buf := &bytes.Buffer{}
+	cmd.SetOut(buf)
+	cmd.SetErr(buf)
+	cmd.SetArgs([]string{"completion", "bash"})
+
+	err := cmd.Execute()
+
+	assert.NoError(t, err)
+	assert.Contains(t, buf.String(), "completion for microcks")
+}

documentation/cmd/completion.md

@@ -0,0 +1,40 @@
+## `microcks completion` - Generate shell completion scripts
+
+Generates shell completion scripts for supported shells.
+
+### Usage
+```bash
+microcks completion [bash|zsh|fish|powershell]
+```
+
+### Examples
+```bash
+# Generate bash completion
+microcks completion bash
+
+# Generate zsh completion
+microcks completion zsh
+
+# Generate fish completion
+microcks completion fish
+
+# Generate PowerShell completion
+microcks completion powershell
+```
+
+### Options
+| Flag         | Description     |
+| ------------ | --------------- |
+| `-h, --help` | help for completion |
+
+### Options Inherited from Parent Commands
+| Flag                     | Description                                 |
+| ------------------------ | ------------------------------------------- |
+| `--config`               | Path to Microcks config file                |
+| `--microcks-context`     | Name of the Microcks context to use         |
+| `--verbose`              | Produce dumps of HTTP exchanges             |
+| `--insecure-tls`         | Allow insecure HTTPS connections            |
+| `--caCerts`              | Comma-separated paths of CA cert files      |
+| `--keycloakClientId`     | Keycloak Realm Service Account ClientId     |
+| `--keycloakClientSecret` | Keycloak Realm Service Account ClientSecret |
+| `--microcksURL`          | Microcks API URL                            |