From d0cc2d32480799d1799cd7743e727acbe39ec356 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Felix=20Bu=CC=88nemann?= <buenemann@louis.info>
Date: Sat, 27 Apr 2019 03:39:33 +0200
Subject: [PATCH] Fix incompatible gem versions in DOCKER=centos CI

* gem update --system tries to use rubygems-update 3.0 which requires
  ruby >= 2.3.0, so use ~> 2.7
* latest bundler 2.x also requires ruby >= 2.3.0, so use ~> 1.17
---
 .travis_Dockerfile_centos | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.travis_Dockerfile_centos b/.travis_Dockerfile_centos
index b6268f679..50a23e98c 100644
--- a/.travis_Dockerfile_centos
+++ b/.travis_Dockerfile_centos
@@ -17,7 +17,7 @@ RUN yum -y install \
   gcc \
   gcc-c++ \
   make
-RUN gem update --system > /dev/null
-RUN gem install bundler
+RUN gem install --no-document "rubygems-update:~>2.7" && update_rubygems
+RUN gem install --no-document "bundler:~>1.17"
 
 CMD sh .travis_centos.sh