added Dockerfiles for building the travis environment

build-env/.dockerignore

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+imagename
+build.sh
+*~
+.*.swp
+\#*#

build-env/Dockerfile.build-env

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+FROM debian:testing-slim
+
+RUN apt-get update && apt-get install -y autoconf automake gcc clang \
+  libtool libtool-bin make pkg-config libcunit1-dev libssl-dev \
+  exuberant-ctags
+RUN apt-get clean

build-env/Dockerfile.develop

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+FROM obgm/libcoap:build-env
+
+RUN apt-get update && apt-get install -y cmake git g++
+RUN apt-get clean
+
+ENV libcoap_dir=/home/libcoap
+ADD . $libcoap_dir
+WORKDIR $libcoap_dir
+
+RUN ./autogen.sh --clean && ./autogen.sh
+RUN ./configure --disable-documentation --enable-tests --enable-examples --with-openssl && make install clean
+
+WORKDIR /home
+RUN git clone --depth 1 https://github.com/cabo/cn-cbor.git && cd cn-cbor && ./build.sh all install
+
+# The image for development with libcoap
+FROM debian:testing-slim
+
+RUN apt-get update && apt-get install -y autoconf automake gcc g++ gdb libtool libtool-bin make \
+ pkg-config libssl-dev
+RUN apt-get install -y iproute2 lsof net-tools inetutils-ping netcat-openbsd less vim
+RUN apt-get clean
+
+COPY --from=0 /usr/local/include/coap /usr/local/include/coap
+COPY --from=0 /usr/local/lib /usr/local/lib
+COPY --from=0 /usr/local/bin/coap-client /usr/local/bin/
+COPY --from=0 /usr/local/include/cn-cbor /usr/local/include/cn-cbor
+RUN echo "/usr/local/lib" >>/etc/ld.so.conf.d/usr_local.conf && ldconfig /usr/local/lib
+
+ARG user=user
+RUN adduser --disabled-password --gecos '' $user
+RUN chown -R $user:$user /home/$user
+WORKDIR /home/$user
+USER $user
+
+EXPOSE 5683 5684

build-env/build.sh

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+#! /usr/bin/env bash
+
+pushd $(dirname $0)
+. ./imagename
+
+# see https://stackoverflow.com/a/2924755 for switching boldface on/off
+bold=$(tput bold)
+normal=$(tput sgr0)
+
+echo "${bold}**** Creating build-env image ****${normal}"
+docker build -f Dockerfile.build-env -t $USER/$IMAGE:build-env .
+
+echo "${bold}**** Creating develop image ****${normal}"
+docker build -f Dockerfile.develop -t $USER/$IMAGE:develop ..
+
+popd

build-env/imagename

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+USER=obgm
+IMAGE=libcoap