在构建时，从一个dockerfile中，我得到了这个：

/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018: The "ResolvePackageAssets" task failed unexpectedly. [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018: NuGet.Packaging.Core.PackagingException: Unable to find fallback package folder '/usr/local/share/dotnet/sdk/NuGetFallbackFolder'. [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at NuGet.Packaging.FallbackPackagePathResolver..ctor(String userPackageFolder, IEnumerable`1 fallbackPackageFolders) [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.NuGetPackageResolver.CreateResolver(IEnumerable`1 packageFolders) [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.NuGetPackageResolver.CreateResolver(LockFile lockFile) [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheWriter..ctor(ResolvePackageAssets task) [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheReader.CreateReaderFromDisk(ResolvePackageAssets task, Byte[] settingsHash) [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheReader..ctor(ResolvePackageAssets task) [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.ReadItemGroups() [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.ResolvePackageAssets.ExecuteCore() [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.NET.Build.Tasks.TaskBase.Execute() [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [/src/test/test.fsproj]
/usr/share/dotnet/sdk/3.1.102/Sdks/Microsoft.NET.Sdk/targets/Microsoft.PackageDependencyResolution.targets(234,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask) [/src/test/test.fsproj]

Build FAILED.

更易读的版本是：

The "ResolvePackageAssets" task failed unexpectedly. [/src/test/test.fsproj]
NuGet.Packaging.Core.PackagingException: Unable to find fallback package folder '/usr/local/share/dotnet/sdk/NuGetFallbackFolder'. [/src/test/test.fsproj]
   at NuGet.Packaging.FallbackPackagePathResolver..ctor(String userPackageFolder, IEnumerable`1 fallbackPackageFolders) [/src/test/test.fsproj]
   at Microsoft.NET.Build.Tasks.NuGetPackageResolver.CreateResolver(IEnumerable`1 packageFolders) [/src/test/test.fsproj]
   at Microsoft.NET.Build.Tasks.NuGetPackageResolver.CreateResolver(LockFile lockFile) [/src/test/test.fsproj]
   at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheWriter..ctor(ResolvePackageAssets task) [/src/test/test.fsproj]
   at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheReader.CreateReaderFromDisk(ResolvePackageAssets task, Byte[] settingsHash) [/src/test/test.fsproj]
   at Microsoft.NET.Build.Tasks.ResolvePackageAssets.CacheReader..ctor(ResolvePackageAssets task) [/src/test/test.fsproj]
   at Microsoft.NET.Build.Tasks.ResolvePackageAssets.ReadItemGroups() [/src/test/test.fsproj]
   at Microsoft.NET.Build.Tasks.ResolvePackageAssets.ExecuteCore() [/src/test/test.fsproj]
   at Microsoft.NET.Build.Tasks.TaskBase.Execute() [/src/test/test.fsproj]
   at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [/src/test/test.fsproj]
   at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask) [/src/test/test.fsproj]

Build FAILED.

这是一个正在工作的文档文件：

FROM mcr.microsoft.com/dotnet/core/sdk:3.1 as build

WORKDIR /src/
COPY . /src/
RUN dotnet build -c Release -o /app test/test.fsproj

FROM build AS publish
RUN dotnet publish -c Release -o /app --no-restore test/test.fsproj

FROM mcr.microsoft.com/dotnet/core/aspnet:3.1 as final

WORKDIR /app
COPY --from=publish /app .

CMD ["dotnet", "test.dll"]

项目Test.fsproj依赖于其他项目，但我在这里对其进行了简化，以显示哪些项目不起作用：

FROM mcr.microsoft.com/dotnet/core/sdk:3.1 as build

WORKDIR /src/
COPY test/test.fsproj ./test/
COPY test/common/libraries/mathematics/mathematics.fsproj ./test/common/libraries/mathematics/
RUN dotnet restore test/test.fsproj

COPY . /src/
RUN dotnet build -c Release -o /app test/test.fsproj

FROM build AS publish
RUN dotnet publish -c Release -o /app --no-restore test/test.fsproj

FROM mcr.microsoft.com/dotnet/core/aspnet:3.1 as final

WORKDIR /app
COPY --from=publish /app .

CMD ["dotnet", "test.dll"]

这个版本不工作。我正在尝试做的是使一个恢复，通过复制主项目和它的依赖关系，匹配文件夹布局，使docker可以使一个层留在该高速缓存中，并不经常恢复nuget包。在一个锁定区，我依赖于sim卡的互联网现在和重新下载nuget包在每一个建设是一个完全的浪费。
我不明白我得到的nuget错误。恢复工作，然后构建，就在失败之后。

5条答案

按热度按时间

gopyfrb31#

有同样的问题。经过一些谷歌搜索，我发现这个很好的问题：https://github.com/dotnet/dotnet-docker/issues/2050
简单地说，答案是：如果您已经在Docker之外构建了项目，那么您将有输出文件夹，这些文件夹将被复制到Docker构建环境中，从而导致此问题。
解决方案是添加一个.dockerignore文件来防止这种情况发生。


# directories

**/bin/
**/obj/
**/out/

# files

Dockerfile*

**/*.md

赞(0）回复(0）举报 2022-11-03

plicqrtu2#

我下载了一个ZIP项目，在构建它时遇到了同样的问题。这个问题通过检查nuget包的源代码-工具-〉Nuget包管理器-〉包管理器设置-〉Nuget包管理器-〉包源代码来解决

请检查套件的来源。这可能是造成问题的原因。

2nc8po8w3#

我的脑海中浮现出许多事情。

1：使用以下标记编辑csproj：

<PropertyGroup>
    <RestoreFallbackFolders>clear</RestoreFallbackFolders>
  </PropertyGroup>

2：更新停靠文件。

dotnet sdk没有错误文件夹。

root@bd6d24a2e56b:/# cd /usr/local/share/dotnet/sdk/NuGetFallbackFolder
bash: cd: /usr/local/share/dotnet/sdk/NuGetFallbackFolder: No such file or directory

在FROM下添加RUN命令：

FROM mcr.microsoft.com/dotnet/core/sdk:3.1 as build
RUN mkdir -p /usr/local/share/dotnet/sdk/NuGetFallbackFolder

dw1jzc5e4#

要解决“找不到回退软件包文件夹”错误，您需要在该目录中创建一个空文件夹，如下所示：/usr/本地/共享/dotnet/sdk/新获取回退文件夹

agyaoht75#

TL;DR

我遇到了同样的问题。而且花了我2天的时间才解决。
在Visual Studio中Tools-> Nuget Package Manager->Package Manager Setting->Package source
存在脱机包源位置。如果未找到定义为脱机包源的文件夹，则会遇到此错误。
若要解决此错误，您有两个选择：
1.创建缺少的文件夹，其中包含其脱机包，或者
1.删除脱机位置引用。
要删除脱机位置引用，请转到C:\Program Files (x86)\NuGet\Config\并删除软件包源配置文件，然后一切都将正常

docker 在文档文件中构建项目时，“Unable to find fallback package folder”(无法找到回退包文件夹)错误是从哪里来的？

5条答案

1：使用以下标记编辑csproj：

2：更新停靠文件。

TL;DR

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