# syntax=docker/dockerfile:1
#
# libwpd (WordPerfect for DOS, Windows and Mac, versions 1 to X9 and later)
# with librevenge, compiled to WebAssembly for johnmcm.com's
# /open-file/wordperfect. Built the same way as wasm-src/wps/: the Emscripten
# image pinned by digest, every source tarball by SHA-256 from the projects'
# own release locations, and the same JSON recorder (src/recorder.*), so the
# page builds the document with the Works Viewer's code.
#
#   ./build.ps1            (or)   docker build --target export --output type=local,dest=dist .
#
# Licences: libwpd and librevenge are MPL-2.0 (or LGPL-2.1+). These build
# files are published at /source/wpd/; the sources are the release tarballs
# named below, checked by SHA-256.

ARG EMSDK_IMAGE=emscripten/emsdk:6.0.10@sha256:e077d54e2b8970575ebc4f185ac1de0b95c05f2b266134d4ba27449af7aebf65

FROM ${EMSDK_IMAGE} AS deps

ARG LIBREVENGE_VERSION=0.0.5
ARG LIBREVENGE_SHA256=5892ca6796f7a2a93d580832e907e849b19d980b40d326a283b18877ab6de0c5
ARG LIBWPD_VERSION=0.10.3
ARG LIBWPD_SHA256=2465b0b662fdc5d4e3bebcdc9a79027713fb629ca2bff04a3c9251fdec42dd09

# libwpd throws C++ exceptions while parsing; keep them, as native WebAssembly exceptions.
ENV EH_FLAGS="-fwasm-exceptions"
ENV PREFIX=/opt/rv
# librevenge's headers include Boost (header-only).
ENV PORT_FLAGS="-sUSE_ZLIB=1 -sUSE_BOOST_HEADERS=1"

RUN embuilder build boost_headers zlib

WORKDIR /src
RUN curl -fsSL -o librevenge.tar.bz2 https://dev-www.libreoffice.org/src/librevenge-${LIBREVENGE_VERSION}.tar.bz2 \
 && echo "${LIBREVENGE_SHA256}  librevenge.tar.bz2" | sha256sum -c - \
 && curl -fsSL -o libwpd.tar.xz https://dev-www.libreoffice.org/src/libwpd-${LIBWPD_VERSION}.tar.xz \
 && echo "${LIBWPD_SHA256}  libwpd.tar.xz" | sha256sum -c - \
 && tar xjf librevenge.tar.bz2 && tar xJf libwpd.tar.xz

WORKDIR /src/librevenge-${LIBREVENGE_VERSION}
RUN emconfigure ./configure --prefix=${PREFIX} \
      --disable-shared --enable-static \
      --disable-tests --without-docs --disable-werror --disable-weffc \
      --enable-streams --disable-generators \
      CFLAGS="-Oz ${EH_FLAGS}" CXXFLAGS="-Oz ${EH_FLAGS} ${PORT_FLAGS}" CPPFLAGS="${PORT_FLAGS}" \
      LDFLAGS="${PORT_FLAGS} ${EH_FLAGS}" \
      ZLIB_CFLAGS=" " ZLIB_LIBS="-sUSE_ZLIB=1" \
 && emmake make -j"$(nproc)" && emmake make install

WORKDIR /src/libwpd-${LIBWPD_VERSION}
RUN emconfigure ./configure --prefix=${PREFIX} \
      --disable-shared --enable-static \
      --disable-tools --disable-fuzzers --without-docs --disable-werror --disable-weffc \
      CFLAGS="-Oz ${EH_FLAGS}" CXXFLAGS="-Oz ${EH_FLAGS} ${PORT_FLAGS}" CPPFLAGS="${PORT_FLAGS}" \
      LDFLAGS="${PORT_FLAGS} ${EH_FLAGS}" \
      REVENGE_CFLAGS="-I${PREFIX}/include/librevenge-0.0" REVENGE_LIBS="-L${PREFIX}/lib -lrevenge-0.0" \
      REVENGE_STREAM_CFLAGS="-I${PREFIX}/include/librevenge-0.0" REVENGE_STREAM_LIBS="-L${PREFIX}/lib -lrevenge-stream-0.0" \
 && emmake make -j"$(nproc)" && emmake make install

FROM deps AS wasm
WORKDIR /binding
COPY src/ ./
RUN mkdir -p /out \
 && em++ -std=c++17 -Oz ${EH_FLAGS} ${PORT_FLAGS} -I${PREFIX}/include/librevenge-0.0 -c recorder.cpp -o /tmp/recorder.o \
 && em++ -std=c++17 -Oz ${EH_FLAGS} ${PORT_FLAGS} -I${PREFIX}/include/librevenge-0.0 -I${PREFIX}/include/libwpd-0.10 -c binding.cpp -o /tmp/binding.o \
 && em++ -Oz /tmp/binding.o /tmp/recorder.o -L${PREFIX}/lib -lwpd-0.10 -lrevenge-stream-0.0 -lrevenge-0.0 \
      ${EH_FLAGS} ${PORT_FLAGS} -lembind \
      -sMODULARIZE=1 -sEXPORT_ES6=1 -sEXPORT_NAME=createWpd \
      -sENVIRONMENT=web,worker,node \
      -sALLOW_MEMORY_GROWTH=1 -sSTACK_SIZE=1048576 -sINITIAL_MEMORY=33554432 \
      -sFILESYSTEM=0 -sDYNAMIC_EXECUTION=0 \
      -sINCOMING_MODULE_JS_API=print,printErr,locateFile,wasmBinary \
      -o /out/wpd.mjs \
 && ls -l /out

FROM scratch AS export
COPY --from=wasm /out/ /