From cc15309b2ad9c2b725b0df66e3e9b276f0653b5a Mon Sep 17 00:00:00 2001
From: Jun Aruga <jaruga@redhat.com>
Date: May 23 2019 10:12:35 +0000
Subject: Assign a random testing port


That fixes below error as much as possible. (The example is for rubygem-pg)
https://src.fedoraproject.org/rpms/rubygem-pg/pull-request/3

---

diff --git a/rubygem-mysql2.spec b/rubygem-mysql2.spec
index 0b459d3..cd2c37e 100644
--- a/rubygem-mysql2.spec
+++ b/rubygem-mysql2.spec
@@ -86,7 +86,9 @@ pushd .%{gem_instdir}
 
 TOP_DIR=$(pwd)
 # Use testing port because the standard mysqld port 3306 is occupied.
-MYSQL_TEST_PORT="13306"
+# Assign a random port to consider a case of multi builds in parallel in a host.
+# https://src.fedoraproject.org/rpms/rubygem-pg/pull-request/3
+MYSQL_TEST_PORT="$((13306 + ${RANDOM} % 1000))"
 MYSQL_TEST_USER=$(id -un)
 MYSQL_TEST_DATA_DIR="${TOP_DIR}/data"
 MYSQL_TEST_SOCKET="${TOP_DIR}/mysql.sock"