FROM ubuntu:bionic

# Install packages available from standard repos
RUN apt-get update -qq && \
    apt-get install -y --no-install-recommends \
        software-properties-common wget git gpg-agent file \
        python3 python3-pip graphviz ccache cppcheck build-essential \
        neovim

# User-settable versions:
# This Dockerfile should support gcc-[7, 8, 9, 10] and clang-[10, 11]
# Earlier versions of clang will require significant modifications to the IWYU section
ARG GCC_VER="10"
ARG LLVM_VER="11"

# Add gcc-${GCC_VER}
RUN add-apt-repository -y ppa:ubuntu-toolchain-r/test && \
    apt-get update -qq && \
    apt-get install -y --no-install-recommends gcc-${GCC_VER} g++-${GCC_VER}

# Add clang-${LLVM_VER}
RUN wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add - 2>/dev/null && \
    add-apt-repository -y "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-${LLVM_VER} main" && \
    apt-get update -qq && \
    apt-get install -y --no-install-recommends \
        clang-${LLVM_VER} lldb-${LLVM_VER} lld-${LLVM_VER} clangd-${LLVM_VER} \
        llvm-${LLVM_VER}-dev libclang-${LLVM_VER}-dev clang-tidy-${LLVM_VER}

# Add current cmake/ccmake, from Kitware
RUN wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null \
        | gpg --dearmor - | tee /etc/apt/trusted.gpg.d/kitware.gpg >/dev/null && \
    apt-add-repository 'deb https://apt.kitware.com/ubuntu/ bionic main' && \
    apt-get update -qq && \
    apt-get install -y --no-install-recommends cmake cmake-curses-gui

# Set the default clang-tidy, so CMake can find it
RUN update-alternatives --install /usr/bin/clang-tidy clang-tidy $(which clang-tidy-${LLVM_VER}) 1

# Install include-what-you-use
ENV IWYU /home/iwyu
ENV IWYU_BUILD ${IWYU}/build
ENV IWYU_SRC ${IWYU}/include-what-you-use
RUN mkdir -p ${IWYU_BUILD} && \
    git clone --branch clang_${LLVM_VER} \
        https://github.com/include-what-you-use/include-what-you-use.git \
        ${IWYU_SRC}
RUN CC=clang-${LLVM_VER} CXX=clang++-${LLVM_VER} cmake -S ${IWYU_SRC} \
        -B ${IWYU_BUILD} \
        -G "Unix Makefiles" -DCMAKE_PREFIX_PATH=/usr/lib/llvm-${LLVM_VER} && \
    cmake --build ${IWYU_BUILD} -j && \
    cmake --install ${IWYU_BUILD}

# Per https://github.com/include-what-you-use/include-what-you-use#how-to-install:
# `You need to copy the Clang include directory to the expected location before
#  running (similarly, use include-what-you-use -print-resource-dir to learn
#  exactly where IWYU wants the headers).`
RUN mkdir -p $(include-what-you-use -print-resource-dir 2>/dev/null)
RUN ln -s $(readlink -f /usr/lib/clang/${LLVM_VER}/include) \
    $(include-what-you-use -print-resource-dir 2>/dev/null)/include

## Cleanup cached apt data we don't need anymore
#RUN apt-get clean && \
#    rm -rf /var/lib/apt/lists/*

# Set gcc-${GCC_VER} as default gcc
RUN update-alternatives --install /usr/bin/gcc gcc $(which gcc-${GCC_VER}) 100
RUN update-alternatives --install /usr/bin/g++ g++ $(which g++-${GCC_VER}) 100

# Set clang-${LLVM_VER} as default clang
RUN update-alternatives --install /usr/bin/clang clang $(which clang-${LLVM_VER}) 100
RUN update-alternatives --install /usr/bin/clang++ clang++ $(which clang++-${LLVM_VER}) 100

# Allow the user to set compiler defaults
ARG USE_CLANG
# if --build-arg USE_CLANG=1, set CC to 'clang' or set to null otherwise.
ENV CC=${USE_CLANG:+"clang"}
ENV CXX=${USE_CLANG:+"clang++"}
# if CC is null, set it to 'gcc' (or leave as is otherwise).
ENV CC=${CC:-"gcc"}
ENV CXX=${CXX:-"g++"}

# Include project
ADD . /starter_project
WORKDIR /starter_project

CMD ["/bin/bash"]