Merge branch '2.4'

Author: André R

.travis.yml

@@ -1,5 +1,4 @@
-sudo: required
-dist: trusty
+dist: xenial
 language: generic
 
 services:

bin/.travis/trusty/update_docker.sh

@@ -1,20 +1,32 @@
-#!/usr/bin/env sh
+#!/bin/bash
 
-# Update package info and selectively update docker-engine (and keep old travis specific config file)
-docker -v
-sudo apt-get update
-sudo apt-get --reinstall -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" install docker-ce
-docker -v
+# Update Docker, if needed
+d_full=`docker version --format '{{.Server.Version}}'`
+d=`echo $d_full | ( IFS="." ; read a b c && echo $a.$b)`
+if (( $(echo "$d < 18.06" |bc -l) )); then
+    echo "Updating Docker from ${d} (${d_full}) to newest community edition"
+    # Update package info and selectively update docker-engine (and keep old travis specific config file)
+    sudo apt-get update
+    sudo apt-get --reinstall -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" install docker-ce
+    docker -v
+else
+    echo "Skip updating Docker ${d} (${d_full})"
+fi
 
 # If we need to pin it to a given version:
 # sudo apt-get --reinstall -y [...] install docker-engine=1.11.0-0~jessie
 # http://apt.dockerproject.org/repo/dists/debian-jessie/main/binary-amd64/Packages
 
-
-docker-compose -v
-DOCKER_COMPOSE_VERSION="1.23.1"
-echo "\nUpdating Docker Compose to ${DOCKER_COMPOSE_VERSION}"
-sudo rm -f /usr/local/bin/docker-compose
-curl -L https://github.com/docker/compose/releases/download/${DOCKER_COMPOSE_VERSION}/docker-compose-`uname -s`-`uname -m` > docker-compose
-chmod +x docker-compose
-sudo mv docker-compose /usr/local/bin
+# Update Docker Compose, if needed
+dc_full=`docker-compose version --short`
+dc=`echo $dc_full | ( IFS="." ; read a b c && echo $a.$b)`
+if (( $(echo "$dc < 1.23" |bc -l) )); then
+    DOCKER_COMPOSE_VERSION="1.23.2"
+    echo "Updating Docker Compose from ${dc} (${dc_full}) to ${DOCKER_COMPOSE_VERSION}"
+    sudo rm -f /usr/local/bin/docker-compose
+    curl -L https://github.com/docker/compose/releases/download/${DOCKER_COMPOSE_VERSION}/docker-compose-`uname -s`-`uname -m` > docker-compose
+    chmod +x docker-compose
+    sudo mv docker-compose /usr/local/bin
+else
+    echo "Skip updating Docker Compose ${dc} (${dc_full})"
+fi