The Function App build is failing with DirectoryNotFound exception

Can anyone please respond?

Hi Siddartha Cherukumudi,

The DirectoryNotFoundException indicates the build process is looking for an extensions.json file in a path that doesn't exist. Here's how to resolve it:

• Check the Path : Make sure the full path exists: C:\Users\scherukumudi\git\MCFR\target\Debug\AnyCPU\src\Microsoft.Retail.ShopperCopilot.FunctionApp\Debug\.azurefunctions\
• Do a full clean and rebuild of the solution.
• Ensure the build process has permission to write to that directory.
• Since it works on your Devbox, compare SDK versions, build tools, and configs.
• Confirm you're using compatible versions of Azure.Functions.Worker.SDK and .NET SDK.

Hello Siddartha Cherukumudi,

Following up to see if you had a chance to review the above response. If you have any further updates on this issue, please feel free to post them here.

Hello @Shireesha Eeraboina Yes I have tried all the approaches but no avail even I wen one step ahead and uninstalled and reinstalled VS. My dotnet version is 8.0.408 and the Worker.SDK version is 1.17.2. If the issue is with versions the same should not have worked in my DevBox

Hello Siddartha Cherukumudi,

The error occurred because the extensions.json file is missing from the C:\Users\scherukumudi\git\MCFR\target\Debug\AnyCPU\src\Microsoft.Retail.ShopperCopilot.FunctionApp\Debug\.azurefunctions\ directory.

Check whether the extensions.json file exists. If it is missing, you can generate it using the below command.

func extensions install

• Sometimes, old or corrupted build artifacts (such as bin or obj directories) can cause issues with the build process. Try cleaning the project by deleting the bin and obj directories and rebuilding the project using below commands.

dotnet clean
dotnet build

• There might be a version mismatch between the Azure Functions Worker SDK and its dependencies. I have updated to the latest version 2.0.0, since .NET 8 no longer supports 1.17.2.

Try running the func start command to run the function locally.

.csproj :

<Project Sdk="Microsoft.NET.Sdk">

Follow above steps to resolve the issue.Hello Siddartha Cherukumudi,

The error occurred because the extensions.json file is missing from the C:\Users\scherukumudi\git\MCFR\target\Debug\AnyCPU\src\Microsoft.Retail.ShopperCopilot.FunctionApp\Debug\.azurefunctions\ directory.

Check whether the extensions.json file exists. If it is missing, you can generate it using the below command.

func extensions install

• Sometimes, old or corrupted build artifacts (such as bin or obj directories) can cause issues with the build process. Try cleaning the project by deleting the bin and obj directories and rebuilding the project using below commands.

dotnet clean
dotnet build

• There might be a version mismatch between the Azure Functions Worker SDK and its dependencies. I have updated to the latest version 2.0.0, since .NET 8 no longer supports 1.17.2.

Try running the func start command to run the function locally.

.csproj :

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net8.0</TargetFramework>
    <AzureFunctionsVersion>v4</AzureFunctionsVersion>
    <OutputType>Exe</OutputType>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <Version>1.0.15.0</Version>
  </PropertyGroup>

  <ItemGroup>
    <Compile Remove="bin\**" />
    <Content Remove="bin\**" />
    <EmbeddedResource Remove="bin\**" />
    <None Remove="bin\**" />
  </ItemGroup>

  <ItemGroup>
    <Content Include="local.settings.json" />
  </ItemGroup>

  <ItemGroup>
    <FrameworkReference Include="Microsoft.AspNetCore.App" />
    <PackageReference Include="Azure.AI.OpenAI" Version="1.0.0-beta.8" />
    <PackageReference Include="Azure.Core" Version="1.44.1" />
    <PackageReference Include="Microsoft.ApplicationInsights.WorkerService" Version="2.21.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker" Version="2.0.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.ApplicationInsights" Version="2.0.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http" Version="3.2.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore" Version="2.0.0" />
    <PackageReference Include="Microsoft.Azure.Functions.Worker.Sdk" Version="2.0.0" OutputItemType="Analyzer" />
    <PackageReference Include="Microsoft.Extensions.Azure" Version="1.9.0" />
    <PackageReference Include="Microsoft.Extensions.Logging" Version="8.0.1" />
    <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.1" />
    <PackageReference Include="Microsoft.Identity.Client" Version="4.67.2" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc.Abstractions" Version="2.2.0" />
    <PackageReference Include="System.Linq.Async" Version="6.0.1" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="C:\Users\kamali\source\repos\FunctionApp48\FunctionApp48\FunctionApp48.csproj" />
  </ItemGroup>

  <ItemGroup>
    <None Update="host.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="LICENSE">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
  </ItemGroup>

  <ItemGroup>
    <Using Include="System.Threading.ExecutionContext" Alias="ExecutionContext" />
  </ItemGroup>

</Project>

Follow above steps to resolve the issue.