qt6-dockerfile

#Base image with emscripten
ARG EMSCRIPTEN_BASE=emscripten/emsdk:2.0.15

FROM $EMSCRIPTEN_BASE AS emscripten-cmake
MAINTAINER Lennart E.
RUN apt update -y && apt upgrade -y && apt install -y wget git
RUN version=3.19 ;\
build=1 ;\
cd $(mktemp -d) ;\
wget https://cmake.org/files/v$version/cmake-$version.$build-Linux-x86_64.sh ;\
mkdir -p /opt/cmake ;\
bash cmake-$version.$build-Linux-x86_64.sh --skip-license --prefix=/opt/cmake
ENV PATH="/opt/cmake/bin:${PATH}"

FROM emscripten-cmake AS prepared-build-stage
MAINTAINER Lennart E.
RUN apt update -y && apt upgrade -y && apt install -y perl python gperf bison flex build-essential libclang-dev clang freeglut3-dev ninja-build
#All modules working for webassembly
#RUN git clone -b dev git://code.qt.io/qt/qt5.git /qt5 && cd /qt5 && ./init-repository --module-subset=qtbase,qtdeclarative,qttools,qttranslations,qtdoc,qtrepotools,qtqa,qtquickcontrols2,qtsvg,qtwayland,qtquicktimeline,qtquick3d,qtshadertools,qtlocation,qtimageformats,qtcharts,qtdatavis3d,qtscxml,qtlottie,qtmqtt,qtquickcontrols,qt5compat
RUN git clone -b dev git://code.qt.io/qt/qt5.git /qt5 && cd /qt5 && ./init-repository --module-subset=essential

FROM prepared-build-stage AS qt6-host-build-stage
MAINTAINER Lennart E.
RUN mkdir /build-host && cd /build-host && /qt5/configure -prefix /qtbase-host -platform linux-g++-64 -cmake-generator Ninja
RUN cd /build-host && cmake --build . --parallel 8
RUN cd /build-host && cmake --install .

FROM prepared-build-stage AS qt6-wasm-build-stage
MAINTAINER Lennart E.
COPY --from=qt6-host-build-stage /qtbase-host /qtbase-host
ENV PATH="/qtbase-host/bin:${PATH}"
# For some reason configure with qttools fails, if these files are not there while configuring. I should look into this.
RUN cd /qt5/qtbase/src/plugins/platforms/wasm && install -t /build-wasm/qtbase/plugins/platforms/ qtloader.js qtlogo.svg wasm_shell.html -D
#TODO figure out how to enable webp support, as -webp qt does not work.
RUN mkdir -p /build-wasm && cd /build-wasm && /qt5/configure -prefix /qtbase -qt-host-path /qtbase-host -xplatform wasm-emscripten -cmake-generator Ninja -nomake tests -nomake examples -developer-build -no-warnings-are-errors
RUN cd /build-wasm && cmake --build . --parallel 8
RUN cd /build-wasm && cmake --install .

#Copy files to new stage
FROM emscripten-cmake AS final-stage
MAINTAINER Lennart E.
RUN apt update -y && apt upgrade -y && apt install -y perl python gperf bison flex build-essential libclang-dev clang freeglut3-dev ninja-build

# Copy host qt tools
COPY --from=qt6-host-build-stage /qtbase-host /qtbase-host
ENV PATH="/qtbase-host/bin:${PATH}"
# Copy qt library
COPY --from=qt6-wasm-build-stage /qtbase /qtbase
ENV PATH="/qtbase/bin:${PATH}"

#Set workdir to /src to maintain compatibility with older versions of this container
WORKDIR /src/

#Create new entrypoint to use emscripten entrypoint and set path, because the
# emscripten entrypoint ignores the path
RUN mkdir -p /qt-webassembly/ ; \
    echo "#""!""/bin/sh" > /qt-webassembly/entrypoint ; \
    echo "if test -f /emsdk_portable/entrypoint ; then /emsdk_portable/entrypoint sh -c \"PATH=\\\"/qtbase/bin:\\\$PATH\\\" \$* \" ; else \$* ; fi" >> /qt-webassembly/entrypoint ; \
    chmod -R a+r /qt-webassembly ; \
    chmod a+x /qt-webassembly/entrypoint
ENTRYPOINT ["/qt-webassembly/entrypoint"]
CMD []