make Dockerfile.windows self-contained

misc/ci/Dockerfile.windows

@@ -1,17 +1,21 @@
-FROM ubuntu:20.04
+FROM ubuntu:22.04
 
 LABEL maintainer="Alice D. <[email protected]>"
 
 ENV LANG C.UTF-8
 ENV DEBIAN_FRONTEND=noninteractive
+ENV TOOLCHAIN_PREFIX=/opt/llvm-mingw
+ENV TOOLCHAIN_VERSION="20220906"
+ARG TOOLCHAIN_ARCHS="i686 x86_64"
+ARG DEFAULT_CRT=ucrt
 
 RUN apt-get update -qq && \
-    apt-get upgrade -qqy && \
+    apt-get dist-upgrade -qqy && \
     apt-get install -qqy --no-install-recommends \
     git wget bzip2 file unzip libtool pkg-config cmake build-essential \
     automake yasm gettext autopoint vim-tiny python3 python3-distutils \
     ninja-build ca-certificates curl less zip python3-docutils python3-pip \
-    nsis gnupg zlibc && \
+    nsis gnupg && \
     apt-get clean -y && \
     rm -rf /var/lib/apt/lists/*
 
@@ -23,15 +27,14 @@ RUN pip3 install \
 
 WORKDIR /build
 
-ENV TOOLCHAIN_PREFIX=/opt/llvm-mingw
-
-ARG TOOLCHAIN_ARCHS="i686 x86_64"
+# clone a specific tag
+RUN git clone --branch $TOOLCHAIN_VERSION \
+	--single-branch \
+	https://github.com/mstorsjo/llvm-mingw
 
-ARG DEFAULT_CRT=ucrt
+WORKDIR /build/llvm-mingw
 
 # Build everything that uses the llvm monorepo. We need to build the mingw runtime before the compiler-rt/libunwind/libcxxabi/libcxx runtimes.
-COPY build-llvm.sh build-lldb-mi.sh strip-llvm.sh install-wrappers.sh build-mingw-w64.sh build-mingw-w64-tools.sh build-compiler-rt.sh build-libcxx.sh build-mingw-w64-libraries.sh build-openmp.sh ./
-COPY wrappers/*.sh wrappers/*.c wrappers/*.h ./wrappers/
 RUN ./build-llvm.sh $TOOLCHAIN_PREFIX && \
     ./build-lldb-mi.sh $TOOLCHAIN_PREFIX && \
     ./strip-llvm.sh $TOOLCHAIN_PREFIX && \
@@ -42,11 +45,9 @@ RUN ./build-llvm.sh $TOOLCHAIN_PREFIX && \
     ./build-libcxx.sh $TOOLCHAIN_PREFIX && \
     ./build-mingw-w64-libraries.sh $TOOLCHAIN_PREFIX && \
     ./build-compiler-rt.sh $TOOLCHAIN_PREFIX --build-sanitizers && \
-    ./build-openmp.sh $TOOLCHAIN_PREFIX && \
-    rm -rf /build/*
+    ./build-openmp.sh $TOOLCHAIN_PREFIX
 
 # Build libssp
-COPY build-libssp.sh libssp-Makefile ./
 RUN ./build-libssp.sh $TOOLCHAIN_PREFIX && \
     rm -rf /build/*