MM-20951 Add sentry support to mattermost-server (#14405)

vendor/github.com/getsentry/sentry-go/util.go

@@ -0,0 +1,34 @@
+package sentry
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"io"
+	"os"
+)
+
+func uuid() string {
+	id := make([]byte, 16)
+	_, _ = io.ReadFull(rand.Reader, id)
+	id[6] &= 0x0F // clear version
+	id[6] |= 0x40 // set version to 4 (random uuid)
+	id[8] &= 0x3F // clear variant
+	id[8] |= 0x80 // set to IETF variant
+	return hex.EncodeToString(id)
+}
+
+func fileExists(fileName string) bool {
+	if _, err := os.Stat(fileName); err != nil {
+		return false
+	}
+
+	return true
+}
+
+//nolint: deadcode, unused
+func prettyPrint(data interface{}) {
+	dbg, _ := json.MarshalIndent(data, "", "  ")
+	fmt.Println(string(dbg))
+}