[MM-10117] Add support to add/delete and enable/disable plugins via CLI (#8745)

* Testing caching for emojis

* MM-10117 Add support to add/delete and activate/deactivate plugins via CLI

* Removing old work

* MM-10117 Moved files and addedd plugin test

* MM-10117 Renamed commands to enable/disable and updated add test

* MM-10117 Finished plugin test and improved error message for plugin commands

* MM-10117 Fixing plugin directories for test

* MM-10117 Renamed commands and updated commands to support multiple plugins

* MM-10117 Updating removed to deleted textclear

* MM-10117 Fixing nil pointer error for listing plugins

* MM-10117 Removing fileReader close

* MM-10117 Declaring error for GetPlugins

* MM-10117 Removing unnecessary nil check

cmd/mattermost/commands/plugin_test.go

@@ -0,0 +1,42 @@
+package commands
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/mattermost/mattermost-server/api4"
+	"github.com/mattermost/mattermost-server/utils"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestPlugin(t *testing.T) {
+	os.MkdirAll("./test-plugins", os.ModePerm)
+	os.MkdirAll("./test-client-plugins", os.ModePerm)
+
+	th := api4.Setup().InitBasic().InitSystemAdmin()
+	defer th.TearDown()
+
+	path, _ := utils.FindDir("tests")
+
+	os.Chdir(filepath.Join("..", "..", ".."))
+
+	CheckCommand(t, "--config", filepath.Join(path, "test-config.json"), "plugin", "add", filepath.Join(path, "testplugin.tar.gz"))
+
+	CheckCommand(t, "--config", filepath.Join(path, "test-config.json"), "plugin", "enable", "testplugin")
+	cfg, _, _, err := utils.LoadConfig(filepath.Join(path, "test-config.json"))
+	require.Nil(t, err)
+	assert.Equal(t, cfg.PluginSettings.PluginStates["testplugin"].Enable, true)
+
+	CheckCommand(t, "--config", filepath.Join(path, "test-config.json"), "plugin", "disable", "testplugin")
+	cfg, _, _, err = utils.LoadConfig(filepath.Join(path, "test-config.json"))
+	require.Nil(t, err)
+	assert.Equal(t, cfg.PluginSettings.PluginStates["testplugin"].Enable, false)
+
+	CheckCommand(t, "--config", filepath.Join(path, "test-config.json"), "plugin", "list")
+
+	CheckCommand(t, "--config", filepath.Join(path, "test-config.json"), "plugin", "delete", "testplugin")
+
+	os.Chdir(filepath.Join("cmd", "mattermost", "commands"))
+}