Dockerfile

FROM ubuntu:22.04 AS builder

ARG DEBIAN_FRONTEND=noninteractive
ARG SDL_VERSION=3.2.14

# ── Build dependencies — same list as release-linux.yml (plus build-essential
RUN apt-get update -qq && \
    apt-get install -y --no-install-recommends \
      build-essential git \
      gcc make pkg-config python3 python3-pip \
      librsvg2-bin \
      liblua5.4-dev \
      cmake ninja-build \
      libwayland-dev libxkbcommon-dev \
      libgl1-mesa-dev libegl1-mesa-dev \
      libpulse-dev libasound2-dev \
      libdbus-1-dev libx11-dev libxext-dev \
      libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev \
      wget ca-certificates && \
    rm -rf /var/lib/apt/lists/*

# ── SDL3 from source — same version/URL/flags/prefix as release-linux.yml ──
RUN wget -q "https://github.com/libsdl-org/SDL/releases/download/release-${SDL_VERSION}/SDL3-${SDL_VERSION}.tar.gz" && \
    tar xf "SDL3-${SDL_VERSION}.tar.gz" && \
    cmake -S "SDL3-${SDL_VERSION}" -B /tmp/sdl3-build \
      -G Ninja \
      -DCMAKE_BUILD_TYPE=Release \
      -DCMAKE_INSTALL_PREFIX=/opt/sdl3 \
      -DSDL_SHARED=ON -DSDL_STATIC=OFF \
      -DSDL_TEST=OFF -DSDL_TESTS=OFF && \
    cmake --build /tmp/sdl3-build --parallel $(nproc) && \
    cmake --install /tmp/sdl3-build && \
    rm -rf /tmp/sdl3-build "SDL3-${SDL_VERSION}" "SDL3-${SDL_VERSION}.tar.gz"

RUN echo "/opt/sdl3/lib" > /etc/ld.so.conf.d/sdl3.conf && \
    (ldconfig || ldconfig || true) && \
    PKG_CONFIG_PATH=/opt/sdl3/lib/pkgconfig pkg-config --modversion sdl3

WORKDIR /src

COPY . .
# cdin-x, checked out by docker.yml into ./cdin-x before the build. It is
# the source of the mandatory bundle: the vim plugin, the default theme and
# the fonts.
#
# It has to land at /cdin-x, not /src/cdin-x. The repo root here is /src, and
# the default CDINX_DIR in mk/bundle.mk is $(abspath $(CURDIR)/../cdin-x) —
# one level *above* the repo, because locally cdin and cdin-x are siblings.
# So from /src that resolves to /cdin-x. Copying it to /src/cdin-x put it
# inside the repo, where the default cannot see it, and the bundle step failed
# with "cdin needs cdin-x to produce a runnable editor".
#
# It cannot simply be checked out as a sibling the way the release workflows
# do, because docker.yml has to place it inside the build context for COPY to
# reach it at all.
COPY cdin-x/ /cdin-x/

# ── Icon assets — same recipe as release-linux.yml (rsvg-convert + Pillow) ──
RUN pip3 install --quiet Pillow && \
    mkdir -p scripts/icons && \
    for sz in 16 22 24 32 48 64 128 256 512 1024; do \
      rsvg-convert -w "$sz" -h "$sz" scripts/icon.svg \
        -o "scripts/icons/cdin-${sz}.png"; \
    done && \
    python3 scripts/gen_icon.py \
      scripts/icon.svg \
      --out-inl        src/icon.inl \
      --out-dir scripts/icons && \
    PNG_COUNT=$(find scripts/icons -name 'cdin-*.png' | wc -l) && \
    [ "$PNG_COUNT" -gt 0 ]

# ── Build release binary — same make invocation as release-linux.yml ────────
RUN PKG_CONFIG_PATH=/opt/sdl3/lib/pkgconfig \
    make -j$(nproc) BUILD=release PLATFORM=linux SDL_VERSION=3

# ═══════════════════════════════════════════════════════════════════════════
# Runtime
# ═══════════════════════════════════════════════════════════════════════════

FROM ubuntu:22.04

ARG DEBIAN_FRONTEND=noninteractive

# ── Runtime dependencies — X11/wayland/audio/udev/GL shared libs SDL3 links
RUN apt-get update -qq && \
    apt-get install -y --no-install-recommends \
      ca-certificates liblua5.4-0 \
      libx11-6 libxext6 libxrandr2 libxcursor1 libxi6 libxinerama1 \
      libxkbcommon0 libwayland-cursor0 libwayland-egl1 \
      libasound2 libpulse0 libdbus-1-3 libudev1 libgl1 && \
    rm -rf /var/lib/apt/lists/*

# ── SDL3 runtime — same /opt/sdl3 prefix as the builder ─────────────────────
COPY --from=builder /opt/sdl3/ /opt/sdl3/
RUN echo "/opt/sdl3/lib" > /etc/ld.so.conf.d/sdl3.conf && (ldconfig || ldconfig || true)

# ── cdin — the layout from mk/install.mk: the real binary and data/ live side
RUN install -dm755 /usr/local/lib/cdin
COPY --from=builder /src/build/linux-release/cdin /usr/local/lib/cdin/cdin
# The ASSEMBLED data/ that the build produced, not the source data/: the
# source holds only the runtime core, and the mandatory set (vim plugin,
# default theme, fonts) is bundled from cdin-x into the build output.
COPY --from=builder /src/build/linux-release/data/ /usr/local/lib/cdin/data/
RUN chmod 755 /usr/local/lib/cdin/cdin && \
    ln -sf /usr/local/lib/cdin/cdin /usr/local/bin/cdin

# ── Non-root user ────────────────────────────────────────────────
RUN useradd -m -u 1000 cdin

ENV HOME=/home/cdin \
    DISPLAY=:0

USER cdin
WORKDIR /home/cdin

ENTRYPOINT ["/usr/local/bin/cdin"]