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Delete .pch after build on pipeline #3771

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merged 2 commits into from
Dec 13, 2019
Merged

Delete .pch after build on pipeline #3771

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42a3833
delete pch after build
licanhua Dec 13, 2019
ba7db6a
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licanhua Dec 13, 2019
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8 changes: 8 additions & 0 deletions change/react-native-windows-2019-12-13-11-33-23-PCHDelete.json
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Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
{
"type": "none",
"comment": "Delete .PCH ",
"packageName": "react-native-windows",
"email": "licanhua@live.com",
"commit": "42a383343b2b7624fb05efd5253064d9102746de",
"date": "2019-12-13T19:33:23.242Z"
}
22 changes: 22 additions & 0 deletions vnext/Directory.Build.targets
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Expand Up @@ -47,4 +47,26 @@
<Message Text="=> VCTargetsPath [$(VCTargetsPath)]" />
</Target>

<Target Name="_ComputePrecompToCleanUp">
<ItemGroup>
<PCHFileToClean Include="$(IntDir)\**\*.pch" />
<_PCHFileToCleanWithTimestamp Include="@(PCHFileToClean)" Condition="'%(Identity)' != ''">
<LastWriteTime>$([System.IO.File]::GetLastWriteTime('%(Identity)'))</LastWriteTime>
</_PCHFileToCleanWithTimestamp>
</ItemGroup>
</Target>
<!--
As a cppwinrt project, .pch is very big, and delete it in pipeline after build
Instead of outright deleting the PCHs, we want to trick the "project freshness detector" by
emitting empty files that look suspiciously like the PCHs it's expecting.
It's of utmost importance that their timestamps match up. -->
<Target Name="CleanUpPrecompHeaders"
DependsOnTargets="_ComputePrecompToCleanUp"
AfterTargets="AfterBuild"
Condition="'$(AGENT_ID)' != ''">
<!-- We just need to keep *ReactNativeWindows*'s PCHs because they get rebuilt more often. -->
<Delete Files="@(_PCHFileToCleanWithTimestamp)"/>
<Touch Files="@(_PCHFileToCleanWithTimestamp)" Time="%(LastWriteTime)" AlwaysCreate="true" />
<Message Text="PCH and Precomp object @(_PCHFileToCleanWithTimestamp) has been deleted for $(ProjectName)." />
</Target>
</Project>