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Fix static assets when running in non prod mode #2346

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Fix static assets when running in non prod mode #2346

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cd8b4e0
Fix static assets when running in non prod mode
GarrettBeatty Apr 23, 2026
b559dd5
fix unit tests
GarrettBeatty Apr 23, 2026
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11 changes: 11 additions & 0 deletions .autover/changes/fix-static-assets-non-production-env.json
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Original file line number Diff line number Diff line change
@@ -0,0 +1,11 @@
{
"Projects": [
{
"Name": "Amazon.Lambda.TestTool",
"Type": "Patch",
"ChangelogMessages": [
"Fixed static assets (CSS, JS, BlazorMonaco) failing to load when ASPNETCORE_ENVIRONMENT or DOTNET_ENVIRONMENT is set to a non-Production value by always serving static files from the tool's install directory."
]
}
]
}
9 changes: 9 additions & 0 deletions Tools/LambdaTestTool-v2/src/Amazon.Lambda.TestTool/Amazon.Lambda.TestTool.csproj
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Expand Up @@ -75,4 +75,13 @@
<ItemGroup>
<None Include="../../README.md" Pack="true" PackagePath="\" />
</ItemGroup>


<!-- Ensure wwwroot content is copied to output directory -->
<ItemGroup>
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@GarrettBeatty GarrettBeatty Apr 23, 2026 •
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the unit tests need this to pass. my guess is dotnet build does not auto copy the wwroot to the output directory.

However when i did the manual testing (as in the pr description), it seems like dotnet pack auto copy everything which is why this change wasn't needed then. But when i ran the tests i had to add in b559dd5

<Content Update="wwwroot\**\*">
<CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
</Content>
</ItemGroup>

</Project>
25 changes: 12 additions & 13 deletions Tools/LambdaTestTool-v2/src/Amazon.Lambda.TestTool/Processes/TestToolProcess.cs
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Expand Up @@ -60,10 +60,8 @@ public static TestToolProcess Startup(RunCommandSettings settings, CancellationT
builder.Services.AddHttpContextAccessor();

var wwwrootPath = Path.Combine(AppContext.BaseDirectory, "wwwroot");
if (builder.Environment.IsProduction())
{
builder.Services.AddSingleton<IFileProvider>(new PhysicalFileProvider(wwwrootPath));
}
var wwwrootFileProvider = new PhysicalFileProvider(wwwrootPath);
builder.Services.AddSingleton<IFileProvider>(wwwrootFileProvider);
builder.Services.AddSingleton<IDirectoryManager, DirectoryManager>();

var serviceHttp = $"http://{settings.LambdaEmulatorHost}:{settings.LambdaEmulatorPort}";
Expand All @@ -87,20 +85,21 @@ public static TestToolProcess Startup(RunCommandSettings settings, CancellationT

var app = builder.Build();

if (app.Environment.IsProduction())
{
app.UseStaticFiles(new StaticFileOptions
{
FileProvider = new PhysicalFileProvider(wwwrootPath)
});
}
else
if (!app.Environment.IsProduction())
{
// nosemgrep: csharp.lang.security.stacktrace-disclosure.stacktrace-disclosure
app.UseDeveloperExceptionPage();
app.UseStaticFiles();
}

// Always use the explicit file provider to serve static files from the tool's install
// directory. Without this, non-Production environments attempt to use the static web
// assets manifest which contains absolute paths from the build machine and will fail
// when running as an installed global tool on a different machine.
app.UseStaticFiles(new StaticFileOptions
{
FileProvider = wwwrootFileProvider
});

app.UseAntiforgery();

app.MapRazorComponents<App>()
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