Fix the Dockerfiles

native/linux/build.cake

@@ -60,6 +60,14 @@ Task("libSkiaSharp")
         var soname = GetVersion("libSkiaSharp", "soname");
         var map = MakeAbsolute((FilePath)"libSkiaSharp/libSkiaSharp.map");
 
+        // This is terrible! But, Alpine (musl) does not define this
+        // so we are forced to for dng_sdk. If this ever becomes a problem
+        // for other libraries, we will need to find a better solution.
+        var wordSize = ReduceArch(arch).EndsWith("64") ? "64" : "32";
+        var wordSizeDefine = VARIANT.ToLower() == "alpine"
+            ? $", '-D__WORDSIZE={wordSize}'"
+            : $"";
+
         GnNinja($"{VARIANT}/{arch}", "SkiaSharp",
             $"target_os='linux' " +
             $"target_cpu='{arch}' " +
@@ -77,7 +85,7 @@ Task("libSkiaSharp")
             $"skia_enable_skottie=true " +
             $"skia_use_vulkan={SUPPORT_VULKAN} ".ToLower() +
             $"extra_asmflags=[] " +
-            $"extra_cflags=[ '-DSKIA_C_DLL', '-DHAVE_SYSCALL_GETRANDOM', '-DXML_DEV_URANDOM' ] " +
+            $"extra_cflags=[ '-DSKIA_C_DLL', '-DHAVE_SYSCALL_GETRANDOM', '-DXML_DEV_URANDOM' {wordSizeDefine} ] " +
             $"extra_ldflags=[ '-static-libstdc++', '-static-libgcc', '-Wl,--version-script={map}' ] " +
             COMPILERS +
             $"linux_soname_version='{soname}' " +

scripts/Docker/alpine/amd64/Dockerfile

@@ -1,33 +1,20 @@
-FROM amd64/alpine:3.9
-
 # Arguments:
-#   DOTNET_SDK_VERSION   - the version of dotnet for the Cake script        [ 3.1.412 | * ]
-
-RUN apk add -X https://dl-cdn.alpinelinux.org/alpine/v3.16/main -u alpine-keys --allow-untrusted
-RUN apk add --no-cache bash curl wget python python3 git build-base ninja fontconfig-dev libintl clang
-
-# use the specific commit before the tool switched to C++20 which is too new for this old alpine
-RUN git clone https://gn.googlesource.com/gn /usr/share/gn \
-    && cd /usr/share/gn \
-    && git checkout d4be45bb28fbfc16a41a1e02c86137df6815f2dd \
-    && python build/gen.py --allow-warning \
-    && ninja -C out \
-    && /usr/share/gn/out/gn --version
+#   DOTNET_SDK_VERSION   - the version of dotnet for the Cake script        [ 8.0 | * ]
 
-ARG DOTNET_SDK_VERSION=3.1.412
+FROM mcr.microsoft.com/dotnet-buildtools/prereqs:alpine-3.17
 
-RUN wget -O dotnet.tar.gz https://dotnetcli.azureedge.net/dotnet/Sdk/$DOTNET_SDK_VERSION/dotnet-sdk-$DOTNET_SDK_VERSION-linux-musl-x64.tar.gz \
-    && dotnet_sha512='f81ec24d3550bd414fb0fa154007f88a2e2956c73d033c2a82a6cea3402f0a842d1f32e8ffc199c0d9ed86faa8005a76b7c3b130e9cd0c1bea71d0631c9a1bcd' \
-    && echo "$dotnet_sha512  dotnet.tar.gz" | sha512sum -c - \
-    && mkdir -p /usr/share/dotnet \
-    && tar -C /usr/share/dotnet -xzf dotnet.tar.gz \
-    && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet \
-    && rm dotnet.tar.gz
+# Install the skia build dependencies
+RUN apk add --no-cache fontconfig-dev gn ninja
 
+# Install the .NET SDK
+ARG DOTNET_SDK_VERSION=8.0
 ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT 1
+RUN wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh \
+    && bash dotnet-install.sh --channel ${DOTNET_SDK_VERSION} --install-dir /usr/share/dotnet --verbose \
+    && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet \
+    && rm dotnet-install.sh \
+    && dotnet help
 
-RUN dotnet help
-
-ENV GN_EXE=/usr/share/gn/out/gn
+ENV CC=clang CXX=clang++ GN_EXE=/usr/bin/gn
 
 WORKDIR /work

scripts/Docker/alpine/amd64/build-local.sh

@@ -3,8 +3,8 @@ set -e
 
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
-(cd $DIR && docker build --tag skiasharp-alpine .)
+(cd $DIR && docker build --tag skiasharp-alpine-x64 .)
 (cd $DIR/../../../../ && \
-    docker run --rm --name skiasharp-alpine --volume $(pwd):/work skiasharp-alpine /bin/bash -c "\
+    docker run --rm --name skiasharp-alpine-x64 --volume $(pwd):/work skiasharp-alpine-x64 /bin/bash -c "\
         dotnet tool restore ; \
         dotnet cake --target=externals-linux --configuration=Release --buildarch=x64 --variant=alpine")

scripts/Docker/alpine/arm64v8/Dockerfile

@@ -0,0 +1,20 @@
+# Arguments:
+#   DOTNET_SDK_VERSION   - the version of dotnet for the Cake script        [ 8.0 | * ]
+
+FROM mcr.microsoft.com/dotnet-buildtools/prereqs:alpine-3.17-arm64v8-local
+
+# Install the skia build dependencies
+RUN apk add --no-cache fontconfig-dev gn ninja
+
+# Install the .NET SDK
+ARG DOTNET_SDK_VERSION=8.0
+ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT 1
+RUN wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh \
+    && bash dotnet-install.sh --channel ${DOTNET_SDK_VERSION} --install-dir /usr/share/dotnet --verbose \
+    && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet \
+    && rm dotnet-install.sh \
+    && dotnet help
+
+ENV CC=clang CXX=clang++ GN_EXE=/usr/bin/gn
+
+WORKDIR /work

scripts/Docker/alpine/arm64v8/build-local.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+set -e
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+(cd $DIR && docker build  --tag skiasharp-alpine-arm64 .)
+(cd $DIR/../../../../ && \
+    docker run --rm --name skiasharp-alpine-arm64 --volume $(pwd):/work skiasharp-alpine-arm64 /bin/bash -c "\
+        dotnet tool restore ; \
+        dotnet cake --target=externals-linux --configuration=Release --buildarch=arm64 --variant=alpine")

scripts/Docker/debian/amd64/Dockerfile

@@ -0,0 +1,22 @@
+# Arguments:
+#   DOTNET_SDK_VERSION   - the version of dotnet for the Cake script        [ 8.0 | * ]
+
+FROM mcr.microsoft.com/dotnet-buildtools/prereqs:debian-11-amd64
+
+# Install the skia build dependencies
+RUN apt-get update \
+    && apt-get install -y libfontconfig1-dev ninja-build \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install the .NET SDK
+ARG DOTNET_SDK_VERSION=8.0
+ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT 1
+RUN curl https://dot.net/v1/dotnet-install.sh -L -o dotnet-install.sh \
+    && bash dotnet-install.sh --channel ${DOTNET_SDK_VERSION} --install-dir /usr/share/dotnet --verbose \
+    && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet \
+    && rm dotnet-install.sh \
+    && dotnet help
+
+ENV CC=clang CXX=clang++
+
+WORKDIR /work

scripts/Docker/debian9/amd64/build-local.sh → scripts/Docker/debian/amd64/build-local.sh

@@ -3,8 +3,8 @@ set -e
 
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
-(cd $DIR && docker build --tag skiasharp-linux .)
+(cd $DIR && docker build --tag skiasharp-linux-x64 .)
 (cd $DIR/../../../../ && \
-    docker run --rm --name skiasharp-linux --volume $(pwd):/work skiasharp-linux /bin/bash -c "\
+    docker run --rm --name skiasharp-linux-x64 --volume $(pwd):/work skiasharp-linux-x64 /bin/bash -c "\
         dotnet tool restore ; \
         dotnet cake --target=externals-linux --configuration=Release --buildarch=x64")

scripts/Docker/debian/arm64v8/.dockerignore

@@ -0,0 +1 @@
+build-local.sh

scripts/Docker/debian/arm64v8/Dockerfile

@@ -0,0 +1,22 @@
+# Arguments:
+#   DOTNET_SDK_VERSION   - the version of dotnet for the Cake script        [ 8.0 | * ]
+
+FROM mcr.microsoft.com/dotnet-buildtools/prereqs:debian-11-arm64v8
+
+# Install the skia build dependencies
+RUN apt-get update \
+    && apt-get install -y libfontconfig1-dev ninja-build \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install the .NET SDK
+ARG DOTNET_SDK_VERSION=8.0
+ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT 1
+RUN curl https://dot.net/v1/dotnet-install.sh -L -o dotnet-install.sh \
+    && bash dotnet-install.sh --channel ${DOTNET_SDK_VERSION} --install-dir /usr/share/dotnet --verbose \
+    && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet \
+    && rm dotnet-install.sh \
+    && dotnet help
+
+ENV CC=clang CXX=clang++
+
+WORKDIR /work

scripts/Docker/debian/arm64v8/build-local.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+set -e
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+(cd $DIR && docker build --tag skiasharp-linux-arm64 .)
+(cd $DIR/../../../../ && \
+    docker run --rm --name skiasharp-linux-arm64 --volume $(pwd):/work skiasharp-linux-arm64 /bin/bash -c "\
+        dotnet tool restore ; \
+        dotnet cake --target=externals-linux --configuration=Release --buildarch=arm64")

scripts/Docker/debian/clang-cross/.dockerignore

@@ -0,0 +1 @@
+build-local.sh

scripts/Docker/debian/clang-cross/Dockerfile

@@ -0,0 +1,62 @@
+# Arguments:
+#   IMAGE_ARCH           - the architecture of the image                    [ amd64 | arm64v8 ]
+#   DOTNET_SDK_VERSION   - the version of dotnet for the Cake script        [ 8.0 | * ]
+#   TOOLCHAIN_VERSION    - the version of the GCC toolchain                 [ 9 | * ]
+#   TOOLCHAIN_ARCH       - the architecture of the GCC toolchain            [ arm-linux-gnueabihf | aarch64-linux-gnu]
+#   TOOLCHAIN_ARCH_SHORT - the short form architecture of the GCC toolchain [ armhf | arm64 ]
+#   FONTCONFIG_VERSION   - the exact version of libfontconfig1 to use       [ 2.13.1-2 | * ]
+
+ARG IMAGE_ARCH=amd64
+FROM mcr.microsoft.com/dotnet-buildtools/prereqs:debian-11-${IMAGE_ARCH}
+
+# Install the skia build dependencies
+RUN apt-get update \
+    && apt-get install -y ninja-build \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install the cross-compilation GCC toolchain
+ARG TOOLCHAIN_VERSION=9
+ARG TOOLCHAIN_ARCH=arm-linux-gnueabihf
+ARG TOOLCHAIN_ARCH_SHORT=armhf
+RUN apt-get update \
+    && apt-get install -y \
+       libstdc++-${TOOLCHAIN_VERSION}-dev-${TOOLCHAIN_ARCH_SHORT}-cross \
+       libgcc-${TOOLCHAIN_VERSION}-dev-${TOOLCHAIN_ARCH_SHORT}-cross \
+       binutils-${TOOLCHAIN_ARCH} \
+    && rm -rf /var/lib/apt/lists/*
+
+# Make the script more flexible and use "current" instead of the actual version
+RUN ln -s /usr/${TOOLCHAIN_ARCH}/include/c++/${TOOLCHAIN_VERSION} /usr/${TOOLCHAIN_ARCH}/include/c++/current \
+    && sed -i "s/\/usr\/${TOOLCHAIN_ARCH}\/lib\///g" /usr/${TOOLCHAIN_ARCH}/lib/libpthread.so \
+    && sed -i "s/\/usr\/${TOOLCHAIN_ARCH}\/lib\///g" /usr/${TOOLCHAIN_ARCH}/lib/libc.so
+
+# Install the cross-compilation skia build dependencies (fontconfig)
+ARG FONTCONFIG_VERSION=2.13.1-2
+RUN (mkdir -p /skia-utils/libfontconfig1-dev \
+    && cd /skia-utils/libfontconfig1-dev \
+    && curl http://deb.debian.org/debian/pool/main/f/fontconfig/libfontconfig1-dev_${FONTCONFIG_VERSION}_${TOOLCHAIN_ARCH_SHORT}.deb -L -o libfontconfig1-dev.deb \
+    && ar vx libfontconfig1-dev.deb \
+    && tar -xJvf data.tar.xz \
+    && rm libfontconfig1-dev.deb \
+    && cp -R usr/lib/*/* /usr/${TOOLCHAIN_ARCH}/lib/ \
+    && cp -R usr/include/* /usr/${TOOLCHAIN_ARCH}/include/ )
+RUN (mkdir -p /skia-utils/libfontconfig1 \
+    && cd /skia-utils/libfontconfig1 \
+    && curl http://deb.debian.org/debian/pool/main/f/fontconfig/libfontconfig1_${FONTCONFIG_VERSION}_${TOOLCHAIN_ARCH_SHORT}.deb -L -o libfontconfig1.deb \
+    && ar vx libfontconfig1.deb \
+    && tar -xJvf data.tar.xz \
+    && rm libfontconfig1.deb \
+    && cp -R usr/lib/*/* /usr/${TOOLCHAIN_ARCH}/lib/ )
+
+# Install the .NET SDK
+ARG DOTNET_SDK_VERSION=8.0
+ENV DOTNET_SYSTEM_GLOBALIZATION_INVARIANT 1
+RUN curl https://dot.net/v1/dotnet-install.sh -L -o dotnet-install.sh \
+    && bash dotnet-install.sh --channel ${DOTNET_SDK_VERSION} --install-dir /usr/share/dotnet --verbose \
+    && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet \
+    && rm dotnet-install.sh \
+    && dotnet help
+
+ENV CC=clang CXX=clang++
+
+WORKDIR /work

scripts/Docker/debian/clang-cross/build-local.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -ex
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+# the target architecture to build for
+ARCH="${1:-arm}"
+case $ARCH in
+  arm)   BUILD_ARGS="--build-arg TOOLCHAIN_ARCH=arm-linux-gnueabihf --build-arg TOOLCHAIN_ARCH_SHORT=armhf" ;;
+  arm64) BUILD_ARGS="--build-arg TOOLCHAIN_ARCH=aarch64-linux-gnu   --build-arg TOOLCHAIN_ARCH_SHORT=arm64" ;;
+  x86)   BUILD_ARGS="--build-arg TOOLCHAIN_ARCH=i686-linux-gnu      --build-arg TOOLCHAIN_ARCH_SHORT=i386"  ;;
+  x64)   BUILD_ARGS="--build-arg TOOLCHAIN_ARCH=x86-64-linux-gnu    --build-arg TOOLCHAIN_ARCH_SHORT=amd64" ;;
+  *) echo "Unsupported architecture: $ARCH" && exit 1 ;;
+esac
+
+# the docker image architecture to use
+IMAGE_ARCH="${2:-$([[ "$(uname -m)" == "arm64" ]] && echo "arm64v8" || echo "amd64")}"
+
+(cd $DIR && docker build --tag skiasharp-linux-cross-$ARCH $BUILD_ARGS --build-arg IMAGE_ARCH=$IMAGE_ARCH .)
+(cd $DIR/../../../../ && 
+    docker run --rm --name skiasharp-linux-cross-$ARCH --volume $(pwd):/work skiasharp-linux-cross-$ARCH /bin/bash -c "\
+        dotnet tool restore ; \
+        dotnet cake --target=externals-linux-clang-cross --configuration=Release --buildarch=$ARCH")