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FROM alpine:3.9 AS build
RUN apk add --no-cache msgpack-c ncurses-libs libevent libexecinfo openssl zlib
RUN apk add --no-cache git wget cmake make gcc g++ linux-headers zlib-dev openssl-dev \
automake autoconf libevent-dev ncurses-dev msgpack-c-dev libexecinfo-dev
RUN set -ex; \
mkdir -p /src/libssh/build; \
cd /src; \
wget -O libssh.tar.xz https://www.libssh.org/files/0.9/libssh-0.9.0.tar.xz; \
tar -xf libssh.tar.xz -C /src/libssh --strip-components=1; \
cd /src/libssh/build; \
cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr -DWITH_SFTP=OFF ..; \
make -j "$(nproc)"; \
make install
RUN mkdir -p /src/tmate-ssh-server
COPY . /src/tmate-ssh-server
RUN set -ex; \
cd /src/tmate-ssh-server; \
./autogen.sh; \
./configure --prefix=/usr CFLAGS="-D_GNU_SOURCE"; \
make -j "$(nproc)"; \
make install
### Minimal run-time image
FROM alpine:3.9
RUN apk add --no-cache msgpack-c ncurses-libs libevent libexecinfo openssl zlib gdb bash
COPY --from=build /usr/lib/libssh.so.* /usr/lib/
COPY --from=build /usr/bin/tmate-ssh-server /usr/bin/
# TODO not run as root. Instead, use capabilities.
COPY docker-entrypoint.sh /usr/local/bin
EXPOSE 2200
ENTRYPOINT ["docker-entrypoint.sh"]
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