Structured logging (#8673)

* Implementing structured logging

* Changes to en.json to allow refactor to run.

* Fixing global logger

* Structured logger initalization.

* Add caller.

* Do some log redirection.

* Auto refactor

* Cleaning up l4g reference and removing dependancy.

* Removing junk.

* Copyright headers.

* Fixing tests

* Revert "Changes to en.json to allow refactor to run."

This reverts commit fd8249e99bcad0231e6ea65cd77c32aae9a54026.

* Fixing some auto refactor strangeness and typo.

* Making keys more human readable.

app/apptestlib.go

@@ -11,9 +11,8 @@ import (
 	"path/filepath"
 	"time"
 
-	l4g "github.com/alecthomas/log4go"
-
 	"github.com/mattermost/mattermost-server/einterfaces"
+	"github.com/mattermost/mattermost-server/mlog"
 	"github.com/mattermost/mattermost-server/model"
 	"github.com/mattermost/mattermost-server/plugin"
 	"github.com/mattermost/mattermost-server/plugin/pluginenv"
@@ -169,8 +168,8 @@ func (me *TestHelper) CreateTeam() *model.Team {
 	utils.DisableDebugLogForTest()
 	var err *model.AppError
 	if team, err = me.App.CreateTeam(team); err != nil {
-		l4g.Error(err.Error())
-		l4g.Close()
+		mlog.Error(err.Error())
+
 		time.Sleep(time.Second)
 		panic(err)
 	}
@@ -192,8 +191,8 @@ func (me *TestHelper) CreateUser() *model.User {
 	utils.DisableDebugLogForTest()
 	var err *model.AppError
 	if user, err = me.App.CreateUser(user); err != nil {
-		l4g.Error(err.Error())
-		l4g.Close()
+		mlog.Error(err.Error())
+
 		time.Sleep(time.Second)
 		panic(err)
 	}
@@ -219,8 +218,8 @@ func (me *TestHelper) createChannel(team *model.Team, channelType string) *model
 	utils.DisableDebugLogForTest()
 	var err *model.AppError
 	if channel, err = me.App.CreateChannel(channel, true); err != nil {
-		l4g.Error(err.Error())
-		l4g.Close()
+		mlog.Error(err.Error())
+
 		time.Sleep(time.Second)
 		panic(err)
 	}
@@ -233,8 +232,8 @@ func (me *TestHelper) CreateDmChannel(user *model.User) *model.Channel {
 	var err *model.AppError
 	var channel *model.Channel
 	if channel, err = me.App.CreateDirectChannel(me.BasicUser.Id, user.Id); err != nil {
-		l4g.Error(err.Error())
-		l4g.Close()
+		mlog.Error(err.Error())
+
 		time.Sleep(time.Second)
 		panic(err)
 	}
@@ -255,8 +254,8 @@ func (me *TestHelper) CreatePost(channel *model.Channel) *model.Post {
 	utils.DisableDebugLogForTest()
 	var err *model.AppError
 	if post, err = me.App.CreatePost(post, channel, false); err != nil {
-		l4g.Error(err.Error())
-		l4g.Close()
+		mlog.Error(err.Error())
+
 		time.Sleep(time.Second)
 		panic(err)
 	}
@@ -269,8 +268,8 @@ func (me *TestHelper) LinkUserToTeam(user *model.User, team *model.Team) {
 
 	err := me.App.JoinUserToTeam(team, user, "")
 	if err != nil {
-		l4g.Error(err.Error())
-		l4g.Close()
+		mlog.Error(err.Error())
+
 		time.Sleep(time.Second)
 		panic(err)
 	}
@@ -283,8 +282,8 @@ func (me *TestHelper) AddUserToChannel(user *model.User, channel *model.Channel)
 
 	member, err := me.App.AddUserToChannel(user, channel)
 	if err != nil {
-		l4g.Error(err.Error())
-		l4g.Close()
+		mlog.Error(err.Error())
+
 		time.Sleep(time.Second)
 		panic(err)
 	}