在构建Blazor项目时，我正试图从Dockerfile运行dotnet workload install microsoft-net-sdk-blazorwebassembly-aot，以便启用AOT WASM编译。
以下是相关的Dockerfile代码：
FROM mcr.microsoft.com/dotnet/sdk:6.0-focal-amd64 AS builder
...
RUN dotnet workload install microsoft-net-sdk-blazorwebassembly-aot
RUN dotnet publish -c Release
然而，这失败了，错误如下：
Updated advertising manifest microsoft.net.sdk.ios.
Updated advertising manifest microsoft.net.sdk.maccatalyst.
Updated advertising manifest microsoft.net.sdk.macos.
Updated advertising manifest microsoft.net.workload.mono.toolchain.
Updated advertising manifest microsoft.net.sdk.tvos.
Updated advertising manifest microsoft.net.sdk.android.
Installing workload manifest microsoft.net.sdk.ios version 14.5.100-preview.5.894.
Workload installation failed, rolling back installed packs...
Installing workload manifest microsoft.net.sdk.ios version 14.5.100-preview.5.881.
Installation roll back failed: Failed to install manifest microsoft.net.sdk.ios version 14.5.100-preview.5.881: The transaction has aborted..
Workload installation failed: Failed to install manifest microsoft.net.sdk.ios version 14.5.100-preview.5.894: Invalid cross-device link.
我还尝试了--skip-manifest，这似乎是为了安装工作负载，但随后无法执行AOT构建。
RUN dotnet workload install microsoft-net-sdk-blazorwebassembly-aot --skip-manifest-update
Installing pack Microsoft.NETCore.App.Runtime.Mono.browser-wasm version 6.0.0-preview.5.21301.5...
Writing workload pack installation record for Microsoft.NETCore.App.Runtime.Mono.browser-wasm version 6.0.0-preview.5.21301.5...
...
Garbage collecting for SDK feature bands 6.0.100...
Successfully installed workload(s) microsoft-net-sdk-blazorwebassembly-aot.
RUN dotnet publish -c Release
...
Optimizing assemblies for size, which may change the behavior of the app. Be sure to test after publishing. See: https://aka.ms/dotnet-illink
AOT'ing 50 assemblies
/usr/share/dotnet/packs/Microsoft.NET.Runtime.WebAssembly.Sdk/6.0.0-preview.5.21301.5/Sdk/WasmApp.targets(507,5): error MSB3073: The command "emcc --version" exited with code 1.
有什么建议吗？
Morgan，您遇到了两个问题：
- 在跳过清单(这是解决方法(上有问题https://github.com/dotnet/sdk/issues/18450
emcc --version错误是问题https://github.com/dotnet/runtime/issues/54342并通过首先安装Python解决。。。参见示例：https://github.com/timheuer/PictureFixer/blob/docker/PictureFixer/Dockerfile#L11-L12(回购中的码头分行(- 然后，您将遇到另一个错误(找不到交叉编译器(，这是一个问题https://github.com/dotnet/runtime/pull/54651(已签入(
一旦在您可以使用的图像中修复了#3，就应该确保您在脚本中添加#2。完整Docker文件示例：
FROM mcr.microsoft.com/dotnet/nightly/aspnet:6.0 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443
#FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
FROM mcr.microsoft.com/dotnet/nightly/sdk:6.0 AS build
COPY ["nuget.config", "nuget.config"]
RUN apt-get update
RUN apt-get install --no-install-recommends --yes python3
RUN dotnet workload install microsoft-net-sdk-blazorwebassembly-aot --skip-manifest-update
WORKDIR /src
COPY ["Server/PictureFixer.Server.csproj", "Server/"]
COPY ["Shared/PictureFixer.Shared.csproj", "Shared/"]
COPY ["Client/PictureFixer.Client.csproj", "Client/"]
RUN dotnet restore "Server/PictureFixer.Server.csproj"
COPY . .
WORKDIR "/src/Server"
RUN dotnet build "PictureFixer.Server.csproj" -c Release -o /app/build --nologo
FROM build AS publish
RUN dotnet publish "PictureFixer.Server.csproj" -c Release -o /app/publish --nologo
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "PictureFixer.Server.dll"]
您可以通过将其添加到Blazor-Wasm项目csproj:中，暂时解决#3问题
<PropertyGroup>
<_MonoAotCrossCompilerPath>@(MonoAotCrossCompiler->WithMetadataValue('RuntimeIdentifier','browser-wasm'))</_MonoAotCrossCompilerPath>
</PropertyGroup>