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/auth_utils_test.go

@@ -0,0 +1,158 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package commands
+
+import (
+	"io/ioutil"
+	"os"
+	"os/user"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestResolveConfigFilePath(t *testing.T) {
+	originalUser := *currentUser
+	defer func() {
+		SetUser(&originalUser)
+	}()
+
+	testUser, err := user.Current()
+	require.NoError(t, err)
+
+	t.Run("should return the default config file location if nothing else is set", func(t *testing.T) {
+		tmp, _ := ioutil.TempDir("", "mmctl-")
+		defer os.RemoveAll(tmp)
+		testUser.HomeDir = tmp
+		SetUser(testUser)
+
+		expected := filepath.Join(getDefaultConfigHomePath(), configParent, configFileName)
+
+		viper.Set("config", filepath.Join(xdgConfigHomeVar, configParent, configFileName))
+
+		p := resolveConfigFilePath()
+		require.Equal(t, expected, p)
+	})
+
+	t.Run("should return config file location from xdg environment variable", func(t *testing.T) {
+		tmp, _ := ioutil.TempDir("", "mmctl-")
+		defer os.RemoveAll(tmp)
+		testUser.HomeDir = tmp
+		SetUser(testUser)
+
+		expected := filepath.Join(testUser.HomeDir, ".config", configParent, configFileName)
+
+		_ = os.Setenv("XDG_CONFIG_HOME", filepath.Join(testUser.HomeDir, ".config"))
+		viper.Set("config", filepath.Join(xdgConfigHomeVar, configParent, configFileName))
+
+		p := resolveConfigFilePath()
+		require.Equal(t, expected, p)
+	})
+
+	t.Run("should return the user-defined config file path if one is set", func(t *testing.T) {
+		tmp, _ := ioutil.TempDir("", "mmctl-")
+		defer os.RemoveAll(tmp)
+
+		testUser.HomeDir = "path/should/be/ignored"
+		SetUser(testUser)
+
+		expected := filepath.Join(tmp, configFileName)
+
+		err := os.Setenv("XDG_CONFIG_HOME", "path/should/be/ignored")
+		require.NoError(t, err)
+		viper.Set("config", expected)
+
+		p := resolveConfigFilePath()
+		require.Equal(t, expected, p)
+	})
+
+	t.Run("should resolve config file path if $HOME variable is used", func(t *testing.T) {
+		tmp, _ := ioutil.TempDir("", "mmctl-")
+		defer os.RemoveAll(tmp)
+
+		testUser.HomeDir = "path/should/be/ignored"
+		SetUser(testUser)
+
+		expected := filepath.Join(testUser.HomeDir, "/.config/mmctl/config")
+
+		err := os.Setenv("XDG_CONFIG_HOME", "path/should/be/ignored")
+		require.NoError(t, err)
+		viper.Set("config", "$HOME/.config/mmctl/config")
+
+		p := resolveConfigFilePath()
+		require.Equal(t, expected, p)
+	})
+
+	t.Run("should create the user-defined config file path if one is set", func(t *testing.T) {
+		tmp, _ := ioutil.TempDir("", "mmctl-")
+		defer os.RemoveAll(tmp)
+
+		testUser.HomeDir = "path/should/be/ignored"
+		SetUser(testUser)
+		extraDir := "extra"
+
+		expected := filepath.Join(tmp, extraDir, "config.json")
+
+		err := os.Setenv("XDG_CONFIG_HOME", "path/should/be/ignored")
+		require.NoError(t, err)
+		viper.Set("config", expected)
+
+		err = SaveCredentials(Credentials{})
+		require.NoError(t, err)
+		info, err := os.Stat(expected)
+		require.NoError(t, err)
+
+		assert.False(t, info.IsDir())
+		assert.True(t, info.Name() == "config.json")
+	})
+
+	t.Run("should return error if the config flag is set to a directory", func(t *testing.T) {
+		tmp, _ := ioutil.TempDir("", "mmctl-")
+		defer os.RemoveAll(tmp)
+
+		testUser.HomeDir = "path/should/be/ignored"
+		SetUser(testUser)
+
+		err := os.Setenv("XDG_CONFIG_HOME", "path/should/be/ignored")
+		require.NoError(t, err)
+		viper.Set("config", tmp)
+
+		err = SaveCredentials(Credentials{})
+		require.Error(t, err)
+		require.True(t, strings.HasSuffix(err.Error(), "is a directory"))
+	})
+}
+
+func TestReadSecretFromFile(t *testing.T) {
+	f, err := ioutil.TempFile(t.TempDir(), "mmctl")
+	require.NoError(t, err)
+
+	_, err = f.WriteString("test-pass")
+	require.NoError(t, err)
+
+	t.Run("password from file", func(t *testing.T) {
+		var pass string
+		err := readSecretFromFile(f.Name(), &pass)
+		require.NoError(t, err)
+		require.Equal(t, "test-pass", pass)
+	})
+
+	t.Run("no file path is provided", func(t *testing.T) {
+		pass := "test-pass-2"
+		err := readSecretFromFile("", &pass)
+		require.NoError(t, err)
+		require.Equal(t, "test-pass-2", pass)
+	})
+
+	t.Run("nonexistent file provided", func(t *testing.T) {
+		var pass string
+		err := readSecretFromFile(filepath.Join(t.TempDir(), "bla"), &pass)
+		require.Error(t, err)
+		require.Empty(t, pass)
+	})
+}