ARG ALPINE_VERSION=latest

FROM alpine:${ALPINE_VERSION}

RUN apk update

RUN apk add --no-cache --virtual .build-dependencies \

gcc \

libc-dev \

libffi-dev \

make \

ruby-dev

RUN apk add --no-cache ruby

RUN gem install travis -v 1.8.8 --no-rdoc --no-ri

RUN apk del .build-dependencies

ENTRYPOINT [ "travis" ]