Includes mmctl into the mono-repo (#23091)

* Includes mmctl into the mono-repo

* Update to use the new public module paths

* Adds docs check to the mmctl CI

* Fix public utils import path

* Tidy up modules

* Fix linter

* Update CI tasks to use the new file structure

* Update CI references

server/cmd/mmctl/commands/root.go

@@ -0,0 +1,95 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package commands
+
+import (
+	"os"
+	"path/filepath"
+	"runtime/debug"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+
+	"github.com/mattermost/mattermost-server/server/public/model"
+
+	"github.com/mattermost/mattermost-server/server/v8/cmd/mmctl/printer"
+)
+
+func Run(args []string) error {
+	viper.SetEnvPrefix("mmctl")
+	viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
+	viper.SetDefault("local-socket-path", model.LocalModeSocketPath)
+	viper.AutomaticEnv()
+
+	RootCmd.PersistentFlags().String("config", filepath.Join(xdgConfigHomeVar, configParent, configFileName), "path to the configuration file")
+	_ = viper.BindPFlag("config", RootCmd.PersistentFlags().Lookup("config"))
+	RootCmd.PersistentFlags().String("config-path", xdgConfigHomeVar, "path to the configuration directory.")
+	_ = viper.BindPFlag("config-path", RootCmd.PersistentFlags().Lookup("config-path"))
+	_ = RootCmd.PersistentFlags().MarkHidden("config-path")
+	RootCmd.PersistentFlags().Bool("suppress-warnings", false, "disables printing warning messages")
+	_ = viper.BindPFlag("suppress-warnings", RootCmd.PersistentFlags().Lookup("suppress-warnings"))
+	RootCmd.PersistentFlags().String("format", "plain", "the format of the command output [plain, json]")
+	_ = viper.BindPFlag("format", RootCmd.PersistentFlags().Lookup("format"))
+	_ = RootCmd.PersistentFlags().MarkHidden("format")
+	RootCmd.PersistentFlags().Bool("json", false, "the output format will be in json format")
+	_ = viper.BindPFlag("json", RootCmd.PersistentFlags().Lookup("json"))
+	RootCmd.PersistentFlags().Bool("strict", false, "will only run commands if the mmctl version matches the server one")
+	_ = viper.BindPFlag("strict", RootCmd.PersistentFlags().Lookup("strict"))
+	RootCmd.PersistentFlags().Bool("insecure-sha1-intermediate", false, "allows to use insecure TLS protocols, such as SHA-1")
+	_ = viper.BindPFlag("insecure-sha1-intermediate", RootCmd.PersistentFlags().Lookup("insecure-sha1-intermediate"))
+	RootCmd.PersistentFlags().Bool("insecure-tls-version", false, "allows to use TLS versions 1.0 and 1.1")
+	_ = viper.BindPFlag("insecure-tls-version", RootCmd.PersistentFlags().Lookup("insecure-tls-version"))
+	RootCmd.PersistentFlags().Bool("local", false, "allows communicating with the server through a unix socket")
+	_ = viper.BindPFlag("local", RootCmd.PersistentFlags().Lookup("local"))
+	RootCmd.PersistentFlags().Bool("short-stat", false, "short stat will provide useful statistical data")
+	_ = RootCmd.PersistentFlags().MarkHidden("short-stat")
+	RootCmd.PersistentFlags().Bool("no-stat", false, "the statistical data won't be displayed")
+	_ = RootCmd.PersistentFlags().MarkHidden("no-stat")
+	RootCmd.PersistentFlags().Bool("disable-pager", false, "disables paged output")
+	_ = viper.BindPFlag("disable-pager", RootCmd.PersistentFlags().Lookup("disable-pager"))
+	RootCmd.PersistentFlags().Bool("quiet", false, "prevent mmctl to generate output for the commands")
+	_ = viper.BindPFlag("quiet", RootCmd.PersistentFlags().Lookup("quiet"))
+
+	RootCmd.SetArgs(args)
+
+	defer func() {
+		if x := recover(); x != nil {
+			printer.PrintError("Uh oh! Something unexpected happened :( Would you mind reporting it?\n")
+			printer.PrintError(`https://github.com/mattermost/mmctl/issues/new?title=%5Bbug%5D%20panic%20on%20mmctl%20v` + Version + "&body=%3C!---%20Please%20provide%20the%20stack%20trace%20--%3E\n")
+			printer.PrintError(string(debug.Stack()))
+
+			os.Exit(1)
+		}
+	}()
+
+	return RootCmd.Execute()
+}
+
+var RootCmd = &cobra.Command{
+	Use:               "mmctl",
+	Short:             "Remote client for the Open Source, self-hosted Slack-alternative",
+	Long:              `Mattermost offers workplace messaging across web, PC and phones with archiving, search and integration with your existing systems. Documentation available at https://docs.mattermost.com`,
+	DisableAutoGenTag: true,
+	PersistentPreRun: func(cmd *cobra.Command, args []string) {
+		format := viper.GetString("format")
+		if viper.GetBool("disable-pager") {
+			printer.OverrideEnablePager(false)
+		}
+
+		printer.SetCommand(cmd)
+		isJSON := viper.GetBool("json")
+		if isJSON || format == printer.FormatJSON {
+			printer.SetFormat(printer.FormatJSON)
+		} else {
+			printer.SetFormat(printer.FormatPlain)
+		}
+		quiet := viper.GetBool("quiet")
+		printer.SetQuiet(quiet)
+	},
+	PersistentPostRun: func(cmd *cobra.Command, args []string) {
+		_ = printer.Flush()
+	},
+	SilenceUsage: true,
+}