FROM alpine:3.5
LABEL maintainer "Shuanglei Tao - tsl0922@gmail.com" \
    maintainer "Damien Duportal - damien.duportal@gmail.com"

ENV GLIBC_VERSION=2.25-r0 \
    LIBWEBSOCKETS_VERSION=2.1.1

RUN apk add --update --no-cache \
        bash \
        bsd-compat-headers \
        build-base \
        ca-certificates \
        cmake \
        curl \
        git \
        g++ \
        json-c \
        json-c-dev \
        openssl \
        openssl-dev \
        vim \
    && curl -L -o /etc/apk/keys/sgerrand.rsa.pub \
        https://raw.githubusercontent.com/sgerrand/alpine-pkg-glibc/master/sgerrand.rsa.pub \
    && curl -LO \
        "https://github.com/sgerrand/alpine-pkg-glibc/releases/download/${GLIBC_VERSION}/glibc-${GLIBC_VERSION}.apk" \
    && apk add --no-cache "glibc-${GLIBC_VERSION}.apk" \
    && git clone --depth=1 -b "v${LIBWEBSOCKETS_VERSION}" https://github.com/warmcat/libwebsockets.git \
        /tmp/libwebsockets \
    && git clone --depth=1 https://github.com/tsl0922/ttyd.git \
        /tmp/ttyd \
    && mkdir -p /tmp/ttyd/build /tmp/libwebsockets/build \
    && cd /tmp/libwebsockets/build \
    && cmake .. \
    && make \
    && make install \
    && cd /tmp/ttyd/build \
    && cmake .. \
    && make \
    && make install \
    && rm -rf /tmp/* /var/cache/apk/* /*.apk \
    && apk del --purge build-base openssl-dev json-c-dev g++ cmake bsd-compat-headers

EXPOSE 7681

ENTRYPOINT ["ttyd"]

CMD ["bash"]