Bundle proper cURL

.travis.yml

@@ -3,9 +3,8 @@ compiler: gcc
 sudo: require
 dist: trusty
 
-install:
-  # replace existing curl with the PPA one
-  - sudo apt-get -y install git cmake g++ libcurl3-gnutls-dev
+before_script:
+  - sudo bash resources/bootstrap-container.sh
 
 script:
   - git submodule update --init

resources/bootstrap-container.sh

@@ -0,0 +1,16 @@
+#! /bin/bash
+
+if ! which wget 2>&1 1>/dev/null; then
+    apt-get update
+    apt-get install -y wget
+fi
+
+echo 'deb http://download.opensuse.org/repositories/home:/TheAssassin:/AppImageLibraries/xUbuntu_14.04/ /' > /etc/apt/sources.list.d/curl-httponly.list
+wget -nv https://download.opensuse.org/repositories/home:TheAssassin:AppImageLibraries/xUbuntu_14.04/Release.key -O- | sudo apt-key add -
+apt-get update
+apt-get install -y git g++ libxpm-dev libcurl3 libcurl3-gnutls build-essential clang g++ libssl-dev
+
+if ! which cmake 2>&1 1>/dev/null; then
+    wget https://cmake.org/files/v3.10/cmake-3.10.0-rc5-Linux-x86_64.tar.gz -O- | tar -xz --strip-components=1 -C /
+fi
+