FROM golang:1.23-alpine AS builder

ARG GO_TRANSCODE_COMMIT=f8137e68c7b8da88c51aec9563eec9585c10c723
WORKDIR /src

RUN apk add --no-cache git
RUN git clone https://github.com/m1k1o/go-transcode.git . \
    && git checkout "$GO_TRANSCODE_COMMIT"

COPY patches/go-transcode-vaapi.patch /tmp/go-transcode-vaapi.patch
RUN git apply /tmp/go-transcode-vaapi.patch \
    && CGO_ENABLED=0 go build -o /go-transcode .

# Keep Alpine 3.17: upstream documents an FFmpeg 6 segmenting regression with
# newer Alpine releases. Install both Intel and Mesa VAAPI drivers so this also
# works if the Unraid host exposes an AMD render device.
FROM alpine:3.17
WORKDIR /app

RUN echo "https://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories \
    && apk add --no-cache \
        bash \
        ffmpeg \
        intel-media-driver \
        libva-intel-driver \
        libva-utils \
        mesa-va-gallium

COPY --from=builder /go-transcode /app/go-transcode

EXPOSE 8080
ENV TRANSCODE_BIND=:8080 \
    TRANSCODE_VAAPI_DEVICE=/dev/dri/renderD128

ENTRYPOINT ["/app/go-transcode"]
CMD ["serve"]