#        -*- Dockerfile -*-
#
# Recipe to build a container image for dash-mpd-cli + helper applications, for Linux/ppc64le.
#
# This Containerfile contains the recipe needed to generate a docker/podman/OCI container image
# including the dash-mpd-cli binary alongside the external helper applications that it uses for
# muxing media streams, for extracting/converting subtitle streams, and for decrypting content
# infected with DRM. These are packaged with a minimal Alpine Linux installation.
#
# To build the container locally (not needed for an end user)
#
#   podman manifest create dash-mpd-cli
#   podman build -f etc/Containerfile_linux_ppc64le --platform linux/ppc64le --tag dash-mpd-cli-linux-ppc64le --manifest dash-mpd-cli .


# We build shaka-packager from source, because it's not packaged for Alpine Linux and not
# distributed in binary form for ppc64le by upstream. It doesn't build on Alpine Linux (with musl-libc)
# due to a missing function definition concerning UnscaledCycleClock::Frequency() used by the
# third-party library abseil-cpp. We build on Debian instead and link statically with glibc.
FROM --platform=linux/ppc64le docker.io/debian:bookworm-slim as debian
WORKDIR /src
RUN apt-get update && apt-get install -y build-essential g++ python3 make cmake zlib1g-dev \
        libssl-dev curl pkgconf git ninja-build file && \
    echo == Building shaka packager && \
    cd /src && git clone --depth 1 --recurse-submodules https://github.com/shaka-project/shaka-packager.git && \
    cd shaka-packager && \
    # sed --in-place 's/^.*add_compile_options.*Werror.*/  add_compile_definitions(_LARGEFILE64_SOURCE)/' packager/CMakeLists.txt && \
    cmake -B build -G Ninja \
       -DCMAKE_BUILD_TYPE=Release \
       -DBUILD_SHARED_LIBS="OFF" \
       -DFULLY_STATIC="ON" && \
    cmake --build build/ && \
    cmake --install build/ --strip --config Release && \
    # this installs as /usr/local/bin/packager
    ls -l /usr/local/bin

# We make a static build of MP4Box from GPAC, which is not packaged for Alpine Linux.
# https://github.com/gpac/gpac/wiki/GPAC-Build-Guide-for-Linux
FROM --platform=linux/ppc64le docker.io/alpine:latest AS builder
WORKDIR /src
COPY ./ ./
RUN apk update && \
    apk upgrade && \
    apk add --no-cache bash curl bsd-compat-headers linux-headers build-base file musl-dev \
       pkgconfig git g++ gcompat libstdc++ binutils make cmake zlib-dev zlib-static ninja \
       python3 cargo rust protoc && \
    cargo update && \
    cargo build --release && \
    echo == Building GPAC && \
    git clone --depth 1 https://github.com/gpac/gpac.git && \
    cd gpac && ./configure --static-bin && \
    make -j 4 && \
    ls -l bin/gcc/ && \
    file bin/gcc/MP4Box

# Now build the final image
FROM --platform=linux/ppc64le docker.io/alpine:latest
LABEL org.opencontainers.image.description "Download media content from a DASH-MPEG or DASH-WebM MPD manifest."
LABEL org.opencontainers.image.title "dash-mpd-cli"
LABEL org.opencontainers.image.url "https://github.com/emarsden/dash-mpd-cli"
LABEL org.opencontainers.image.source "https://github.com/emarsden/dash-mpd-cli"
LABEL org.opencontainers.image.version "0.2.23"
LABEL org.opencontainers.image.authors "eric.marsden@risk-engineering.org"
LABEL org.opencontainers.image.licenses "MIT"

# Install our external dependencies. Licences for the external dependencies:
#   - ffmpeg: GNU GPL v2
#   - mkvmerge (from mkvtoolnix): GNU GPL v2
#   - vlc: GNU GPL v2, not installed because it inflates image size considerably
#   - mp4decrypt (from bento4): GNU GPL v2
#   - xsltproc (from libxslt): MIT
#   - Shaka packager: MIT
#
# As of 2023-12, bento4 is not packaged for ppc64le in Alpine Linux. Use shaka-packager instead.
RUN apk update && \
    apk upgrade && \
    apk add --no-cache ca-certificates libc6-compat wget ffmpeg mkvtoolnix libxslt && \
    update-ca-certificates && \
    mkdir /content && \
    chown root:root /content && \
    chmod a=rwx,o+t /content

COPY --from=builder --chown=root:root --chmod=755 \
    /src/target/release/dash-mpd-cli /usr/local/bin
COPY --from=builder --chown=root:root --chmod=755 \
    /src/gpac/bin/gcc/MP4Box /usr/local/bin
COPY --from=debian --chown=root:root --chmod=755 \
    /usr/local/bin/packager /usr/local/bin/shaka-packager

WORKDIR /content
ENV TERM=xterm-256color
ENTRYPOINT ["/usr/local/bin/dash-mpd-cli"]