FROM archlinux

# Allow container to expose ports at runtime, if necessary
# https://docs.docker.com/engine/reference/#expose
EXPOSE 25
EXPOSE 465
EXPOSE 587

# creates /opensmtpd dir and makes all following commands to run in it
# https://docs.docker.com/engine/reference/builder/#workdir
WORKDIR /opensmtpd

# install necessary packages
RUN pacman -Suy --noconfirm \
  base \
  make \
  m4 \
  grep \
  gcc \
  automake \
  autoconf \
  libtool \
  pkgconf \
  bison \
  gettext \
  libevent \
  openssl \
  pam \
  zlib


# create users and directories
RUN mkdir -p /var/lib/opensmtpd/empty \
  && useradd _smtpd \
     --home-dir /var/lib/opensmtpd/empty \
     --no-create-home \
     --shell /bin/false \
  && useradd _smtpq \
     --home-dir /var/lib/opensmtpd/empty \
     --no-create-home \
     --shell /bin/false \
  && mkdir -p /var/spool/smtpd \
  && mkdir -p /var/mail \
  && mkdir -p /etc/mail \
  && chmod 711 /var/spool/smtpd


# Copy contentes of the repo inside the container
# https://docs.docker.com/engine/reference/builder/#copy
COPY . /opensmtpd


# build opensmtpd
RUN ./bootstrap \
  && ./configure --with-gnu-ld \
       --sysconfdir=/etc/mail \
       --with-path-empty=/var/lib/opensmtpd/empty \
       --with-auth-pam \
  && make \
  && make install \
  && cp etc/aliases /etc/mail/aliases