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msvc: Only update generated headers when there are changes 

This fixes generating the headers casuing complete rebuilds,
even when the headere's content didn't really change.
This commit is contained in:
stijn 2014-05-28 16:03:38 +02:00
parent 813ed3bda6
commit 48d641e41a
1 changed files with 11 additions and 20 deletions
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31
windows/msvc/genhdr.targets
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@ -13,21 +13,6 @@
<MakeDir Directories="$(DestDir)"/>
</Target>
<!--don't let regenerating these files trigger builds-->
<UsingTask TaskName="MakeSameWriteTime" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll" >
<ParameterGroup>
<SourceFile Required="true" ParameterType="System.String"/>
<DestFile Required="true" ParameterType="System.String"/>
</ParameterGroup>
<Task>
<Code Type="Fragment" Language="cs">
<![CDATA[
System.IO.File.SetLastWriteTime( DestFile, System.IO.File.GetLastWriteTime( SourceFile ) );
]]>
</Code>
</Task>
</UsingTask>
<!--see py/py.mk under #qstr data-->
<Target Name="MakeQstrData" DependsOnTargets="MakeDestDir">
<PropertyGroup>
@ -35,9 +20,12 @@
<QstrDefs>$(MsBuildThisFileDirectory)..\..\unix\qstrdefsport.h</QstrDefs>
<DestFile>$(DestDir)qstrdefs.generated.h</DestFile>
</PropertyGroup>
<Exec Command="cl /I$(SrcDir) /I$(MsBuildThisFileDirectory).. /Fi$(PreProc) /P $(SrcDir)qstrdefs.h"/>
<Exec Command="python $(SrcDir)makeqstrdata.py $(PreProc) $(QstrDefs) > $(DestFile)"/>
<MakeSameWriteTime SourceFile="$(MsBuildThisFile)" DestFile="$(DestFile)"/>
<Exec Command="cl /nologo /I$(SrcDir) /I$(MsBuildThisFileDirectory).. /Fi$(PreProc) /P $(SrcDir)qstrdefs.h"/>
<Exec Command="python $(SrcDir)makeqstrdata.py $(PreProc) $(QstrDefs) > $(DestFile).tmp"/>
<Exec Command="fc /B $(DestFile).tmp $(DestFile) > NUL 2>&amp;1" IgnoreExitCode="true">
<Output TaskParameter="ExitCode" PropertyName="FilesDiffer" />
</Exec>
<Copy SourceFiles="$(DestFile).tmp" DestinationFiles="$(DestFile)" Condition="'$(FilesDiffer)'!='0'"/>
</Target>
<!--see py/py-version.sh-->
@ -69,8 +57,11 @@
<Lines Include="#define MICROPY_GIT_HASH &quot;$(GitHash)&quot;"/>
<Lines Include="#define MICROPY_BUILD_DATE &quot;$([System.DateTime]::Now.ToString(`yyyy-MM-dd`))&quot;"/>
</ItemGroup>
<WriteLinesToFile Lines="@(Lines)" File="$(DestFile)" Overwrite="true"/>
<MakeSameWriteTime SourceFile="$(MsBuildThisFile)" DestFile="$(DestFile)"/>
<WriteLinesToFile Lines="@(Lines)" File="$(DestFile).tmp" Overwrite="true"/>
<Exec Command="fc /B $(DestFile).tmp $(DestFile) > NUL 2>&amp;1" IgnoreExitCode="true">
<Output TaskParameter="ExitCode" PropertyName="FilesDiffer" />
</Exec>
<Copy SourceFiles="$(DestFile).tmp" DestinationFiles="$(DestFile)" Condition="'$(FilesDiffer)'!='0'"/>
</Target>
</Project>