Tests on different distros using docker

.travis.yml

@@ -1,3 +1,6 @@
+services:
+  - docker
+
 language: bash
 
 before_install:
@@ -6,3 +9,11 @@ before_install:
 
 script:
 - make test
+- docker run -it  -v $PWD/docker-run.sh:/run.sh -e 'GIT_VER=1:2.7.4-0ubuntu1' -e 'BASH_VER=4.0' ubuntu /run.sh
+- docker run -it  -v $PWD/docker-run.sh:/run.sh -e 'GIT_VER=1:2.7.4-0ubuntu1' -e 'BASH_VER=4.0' ubuntu:14.04 /run.sh
+- docker run -it -v $PWD/docker-run.sh:/run.sh -e 'BASH_VER=4.0' centos /run.sh
+
+after_script:
+- docker run -it  -v $PWD/docker-run.sh:/run.sh -e 'GIT_VER=1:2.7.4-0ubuntu1' -e 'BASH_VER=3.0' ubuntu /run.sh
+- docker run -it  -v $PWD/docker-run.sh:/run.sh -e 'GIT_VER=1:2.7.4-0ubuntu1' -e 'BASH_VER=3.0' ubuntu:14.04 /run.sh
+- docker run -it -v $PWD/docker-run.sh:/run.sh -e 'BASH_VER=4.0' centos /run.sh

docker-run.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+set -e
+
+if [ -f /etc/debian_version ]; then
+    apt-get -y update
+    apt-get -y install gcc wget
+    apt-get -y install make git=$GIT_VER
+elif [ -f /etc/redhat-release ]; then
+    yum -y update
+    yum -y install make git gcc wget
+fi
+
+wget https://ftp.gnu.org/gnu/bash/bash-$BASH_VER.tar.gz
+tar -xvf bash*
+cd bash-$BASH_VER
+./configure --prefix=/usr \
+    --bindir=/bin \
+    --without-bash-malloc \
+    --with-installed-readline
+make
+make install
+
+# Clone git-secrets, install and run tests.
+git clone https://github.com/awslabs/git-secrets.git
+cd git-secrets
+make install
+make test