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Add support for IfDifferent #51826

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36e092e
Add support for IfDifferent
JanKrivanek Nov 20, 2025
69697ad
Add support for IfDifferent in publishing targets
JanKrivanek Nov 21, 2025
31248e6
Merge branch 'main' into dev/jankrivanek/support-ifdifferent
JanKrivanek Nov 21, 2025
95acf9c
Fix typo
JanKrivanek Nov 22, 2025
edb102e
Merge branch 'dev/jankrivanek/support-ifdifferent' of https://github.…
JanKrivanek Nov 22, 2025
3fae8c9
Add tests
JanKrivanek Dec 5, 2025
ed1760c
Merge pull request #1 from JanKrivanek/dev/jankrivanek/ifdifferent-tests
JanKrivanek Dec 5, 2025
4269c7c
Add default main function to tests
JanKrivanek Dec 5, 2025
01a5022
Handle items with publishToOutDir, but without copyToOutDir
JanKrivanek Dec 5, 2025
6b464a9
Fix failing test
JanKrivanek Dec 5, 2025
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29 changes: 27 additions & 2 deletions src/StaticWebAssetsSdk/Targets/Microsoft.NET.Sdk.StaticWebAssets.Publish.targets
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Original file line number Diff line number Diff line change
Expand Up @@ -200,14 +200,16 @@ Copyright (c) .NET Foundation. All rights reserved.
<ItemGroup>
<_PublishStaticWebAssetsCopyAlways Include="@(_PublishStaticWebAssetsTargetPath)" Condition="'%(CopyToPublishDirectory)' == 'Always'" />
<_PublishStaticWebAssetsPreserveNewest Include="@(_PublishStaticWebAssetsTargetPath)" Condition="'%(CopyToPublishDirectory)' == 'PreserveNewest'" />
<_PublishStaticWebAssetsIfDifferent Include="@(_PublishStaticWebAssetsTargetPath)" Condition="'%(CopyToPublishDirectory)' == 'IfDifferent'" />
</ItemGroup>

</Target>

<Target Name="_PublishCopyStaticWebAssetsPreserveNewest"
Inputs="@(_PublishStaticWebAssetsPreserveNewest)"
Outputs="@(_PublishStaticWebAssetsPreserveNewest->'$(PublishDir)%(TargetPath)')"
AfterTargets="_SplitPublishStaticWebAssetsByCopyOptions">
AfterTargets="_SplitPublishStaticWebAssetsByCopyOptions"
Condition=" '@(_PublishStaticWebAssetsPreserveNewest)' != '' ">

<Copy SourceFiles="@(_PublishStaticWebAssetsPreserveNewest)"
DestinationFiles="@(_PublishStaticWebAssetsPreserveNewest->'$(PublishDir)%(TargetPath)')"
Expand All @@ -224,7 +226,8 @@ Copyright (c) .NET Foundation. All rights reserved.
</Target>

<Target Name="_PublishCopyStaticWebAssetsAlways"
AfterTargets="_SplitPublishStaticWebAssetsByCopyOptions">
AfterTargets="_SplitPublishStaticWebAssetsByCopyOptions"
Condition=" '@(_PublishStaticWebAssetsCopyAlways)' != '' ">

<Copy SourceFiles="@(_PublishStaticWebAssetsCopyAlways)"
DestinationFiles="@(_PublishStaticWebAssetsCopyAlways->'$(PublishDir)%(TargetPath)')"
Expand All @@ -239,6 +242,28 @@ Copyright (c) .NET Foundation. All rights reserved.
</Copy>

</Target>

<Target Name="_PublishCopyStaticWebAssetsIfDifferent"
AfterTargets="_SplitPublishStaticWebAssetsByCopyOptions"
Condition=" '@(_PublishStaticWebAssetsIfDifferent)' != '' ">

<!--
Using SkipUnchangedFiles="true" because we want only differing files.
-->
<Copy SourceFiles="@(_PublishStaticWebAssetsIfDifferent)"
DestinationFiles="@(_PublishStaticWebAssetsIfDifferent->'$(PublishDir)%(TargetPath)')"
SkipUnchangedFiles="true"
OverwriteReadOnlyFiles="$(OverwriteReadOnlyFiles)"
Retries="$(CopyRetryCount)"
RetryDelayMilliseconds="$(CopyRetryDelayMilliseconds)"
UseHardlinksIfPossible="$(CreateHardLinksForPublishFilesIfPossible)"
UseSymboliclinksIfPossible="$(CreateSymbolicLinksForPublishFilesIfPossible)">

<Output TaskParameter="DestinationFiles" ItemName="FileWrites"/>

</Copy>

</Target>

<Target Name="CopyStaticWebAssetsEndpointsManifest" DependsOnTargets="GenerateStaticWebAssetsPublishManifest"
AfterTargets="CopyStaticWebAssetsToPublishDirectory">
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24 changes: 23 additions & 1 deletion src/StaticWebAssetsSdk/Targets/Microsoft.NET.Sdk.StaticWebAssets.targets
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Original file line number Diff line number Diff line change
Expand Up @@ -498,6 +498,7 @@ Copyright (c) .NET Foundation. All rights reserved.
<ItemGroup>
<_BuildStaticWebAssetsCopyAlways Include="@(_BuildStaticWebAssetsTargetPath)" Condition="'%(CopyToOutputDirectory)' == 'Always'" />
<_BuildStaticWebAssetsPreserveNewest Include="@(_BuildStaticWebAssetsTargetPath)" Condition="'%(CopyToOutputDirectory)' == 'PreserveNewest'" />
<_BuildStaticWebAssetsIfDifferent Include="@(_BuildStaticWebAssetsTargetPath)" Condition="'%(CopyToOutputDirectory)' == 'IfDifferent'" />
</ItemGroup>

</Target>
Expand Down Expand Up @@ -537,8 +538,29 @@ Copyright (c) .NET Foundation. All rights reserved.
</Copy>

</Target>

<Target Name="_BuildCopyStaticWebAssetsIfDifferent"
AfterTargets="_SplitStaticWebAssetsByCopyOptions">

<!--
Using SkipUnchangedFiles="true" because we want only differing files.
-->
<Copy SourceFiles="@(_BuildStaticWebAssetsIfDifferent)"
DestinationFiles="@(_BuildStaticWebAssetsIfDifferent->'%(TargetPath)')"
SkipUnchangedFiles="true"
OverwriteReadOnlyFiles="$(OverwriteReadOnlyFiles)"
Retries="$(CopyRetryCount)"
RetryDelayMilliseconds="$(CopyRetryDelayMilliseconds)"
UseHardlinksIfPossible="$(CreateHardLinksForPublishFilesIfPossible)"
UseSymboliclinksIfPossible="$(CreateSymbolicLinksForPublishFilesIfPossible)">

<Output TaskParameter="DestinationFiles" ItemName="FileWrites"/>

</Copy>

</Target>

<Target Name="WriteStaticWebAssetsUpToDateCheck" DependsOnTargets="_BuildCopyStaticWebAssetsPreserveNewest;_BuildCopyStaticWebAssetsAlways">
<Target Name="WriteStaticWebAssetsUpToDateCheck" DependsOnTargets="_BuildCopyStaticWebAssetsPreserveNewest;_BuildCopyStaticWebAssetsAlways;_BuildCopyStaticWebAssetsIfDifferent">

<ItemGroup>
<_UpToDateCheckStaticWebAssetCandidate Include="@(StaticWebAsset)" Condition="'%(SourceType)' == 'Discovered'" />
Expand Down
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