FROM tfb/base:latest

RUN apt install -yqq xdg-utils

ENV DLANG=/dlang
ENV DMDVER="2.078.1"
ENV LDCVER="1.7.0"

RUN mkdir -p $DLANG && \
    wget http://downloads.dlang.org/releases/2.x/$DMDVER/dmd_$DMDVER-0_amd64.deb && \
    dpkg-deb -x dmd_$DMDVER-0_amd64.deb $DLANG && \
    cd $DLANG && \
    wget https://github.com/ldc-developers/ldc/releases/download/v$LDCVER/ldc2-$LDCVER-linux-x86_64.tar.xz && \
    tar xvf ldc2-$LDCVER-linux-x86_64.tar.xz && \
    ln -s $DLANG/ldc2-$LDCVER-linux-x86_64/bin/ldc2 $DLANG/usr/bin/ldc2

# According to this file (dmd.conf) dmd will, upon execution, look for
# a dmd.conf in 1) the current working directory [bad], 2) the directory
# specified by the HOME environment variable [bad], 3) the directory in
# which dmd resides [less bad], and 4) the /etc directory.
# We are trying to maintain as little global presence as possible, so
# we need to change the DFLAGS in the dmd.conf to be correctly sandboxed
# to the $DLANG folder.

RUN cp $DLANG/etc/dmd.conf $DLANG/usr/bin && \
    sed -i "s|-I/usr/|-I${DLANG}/usr/|g" $DLANG/usr/bin/dmd.conf && \
    sed -i "s|-L/usr/|-L${DLANG}/usr/|g" $DLANG/usr/bin/dmd.conf

ENV PATH=${DLANG}/usr/bin:${PATH}