[MM-48391] Store the server info in the export version line (#21709)

app/export.go

@@ -7,11 +7,13 @@ import (
 	"archive/zip"
 	"context"
 	"encoding/json"
+	"fmt"
 	"io"
 	"net/http"
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"github.com/pkg/errors"
 
@@ -157,9 +159,17 @@ func (a *App) exportWriteLine(w io.Writer, line *imports.LineImportData) *model.
 
 func (a *App) exportVersion(writer io.Writer) *model.AppError {
 	version := 1
+
+	info := &imports.VersionInfoImportData{
+		Generator: "mattermost-server",
+		Version:   fmt.Sprintf("%s (%s, enterprise: %s)", model.CurrentVersion, model.BuildHash, model.BuildEnterpriseReady),
+		Created:   time.Now().Format(time.RFC3339Nano),
+	}
+
 	versionLine := &imports.LineImportData{
 		Type:    "version",
 		Version: &version,
+		Info:    info,
 	}
 
 	return a.exportWriteLine(writer, versionLine)

app/imports/import_types.go

@@ -5,6 +5,7 @@ package imports
 
 import (
 	"archive/zip"
+	"encoding/json"
 
 	"github.com/mattermost/mattermost-server/v6/model"
 )
@@ -22,6 +23,14 @@ type LineImportData struct {
 	DirectPost    *DirectPostImportData    `json:"direct_post,omitempty"`
 	Emoji         *EmojiImportData         `json:"emoji,omitempty"`
 	Version       *int                     `json:"version,omitempty"`
+	Info          *VersionInfoImportData   `json:"info,omitempty"`
+}
+
+type VersionInfoImportData struct {
+	Generator  string          `json:"generator"`
+	Version    string          `json:"version"`
+	Created    string          `json:"created"`
+	Additional json.RawMessage `json:"additional,omitempty"`
 }
 
 type TeamImportData struct {