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/sampledata_test.go

@@ -0,0 +1,64 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package commands
+
+import (
+	"io/ioutil"
+	"os"
+
+	"github.com/mattermost/mattermost-server/server/v8/cmd/mmctl/printer"
+
+	"github.com/spf13/cobra"
+)
+
+func (s *MmctlUnitTestSuite) TestSampledataCmd() {
+	s.Run("should fail because you have more team memberships than teams", func() {
+		printer.Clean()
+
+		cmd := &cobra.Command{}
+		cmd.Flags().Int("teams", 10, "")
+		cmd.Flags().Int("team-memberships", 11, "")
+		err := sampledataCmdF(s.client, cmd, []string{})
+		s.Require().Error(err)
+		s.Require().Contains(err.Error(), "more team memberships than teams")
+	})
+
+	s.Run("should fail because you have more channel memberships than channels per team", func() {
+		printer.Clean()
+
+		cmd := &cobra.Command{}
+		cmd.Flags().Int("channels-per-team", 10, "")
+		cmd.Flags().Int("channel-memberships", 11, "")
+		err := sampledataCmdF(s.client, cmd, []string{})
+		s.Require().Error(err)
+		s.Require().Contains(err.Error(), "more channel memberships than channels per team")
+	})
+
+	s.Run("should fail because you have group channels and don't have enough users (6 users)", func() {
+		printer.Clean()
+
+		cmd := &cobra.Command{}
+		cmd.Flags().Int("group-channels", 1, "")
+		cmd.Flags().Int("users", 5, "")
+		err := sampledataCmdF(s.client, cmd, []string{})
+		s.Require().Error(err)
+		s.Require().Contains(err.Error(), "group channels generation with less than 6 users")
+	})
+
+	s.Run("should not fail with less than 6 users and no group channels", func() {
+		printer.Clean()
+
+		tmpFile, err := ioutil.TempFile("", "mmctl-sampledata-test-")
+		s.Require().NoError(err)
+		tmpFile.Close()
+		defer os.Remove(tmpFile.Name())
+
+		cmd := &cobra.Command{}
+		cmd.Flags().String("bulk", tmpFile.Name(), "")
+		cmd.Flags().Int("group-channels", 0, "")
+		cmd.Flags().Int("users", 5, "")
+		err = sampledataCmdF(s.client, cmd, []string{})
+		s.Require().NoError(err)
+	})
+}