diff options
| -rw-r--r-- | windows/msvc/genhdr.targets | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/windows/msvc/genhdr.targets b/windows/msvc/genhdr.targets index fe0abbe093..8001985b77 100644 --- a/windows/msvc/genhdr.targets +++ b/windows/msvc/genhdr.targets @@ -7,7 +7,6 @@ </Target> <PropertyGroup> - <SrcDir>$(PyBaseDir)py\</SrcDir> <DestDir>$(PyBuildDir)genhdr\</DestDir> </PropertyGroup> @@ -18,19 +17,18 @@ <!--see py/py.mk under #qstr data--> <Target Name="MakeQstrData" DependsOnTargets="MakeDestDir"> <PropertyGroup> + <PySrcDir>$(PyBaseDir)py\</PySrcDir> <PreProc>$(DestDir)qstrdefs.preprocessed.h</PreProc> <QstrDefs>$(PyBaseDir)unix\qstrdefsport.h</QstrDefs> <DestFile>$(DestDir)qstrdefs.generated.h</DestFile> + <TmpFile>$(DestFile).tmp</TmpFile> </PropertyGroup> <ItemGroup> <PyIncDirs Include="$(PyIncDirs)"/> </ItemGroup> - <Exec Command="cl /nologo /I@(PyIncDirs, ' /I') /Fi$(PreProc) /P $(SrcDir)qstrdefs.h"/> - <Exec Command="python $(SrcDir)makeqstrdata.py $(PreProc) $(QstrDefs) > $(DestFile).tmp"/> - <Exec Command="fc /B $(DestFile).tmp $(DestFile) > NUL 2>&1" IgnoreExitCode="true"> - <Output TaskParameter="ExitCode" PropertyName="FilesDiffer" /> - </Exec> - <Copy SourceFiles="$(DestFile).tmp" DestinationFiles="$(DestFile)" Condition="'$(FilesDiffer)'!='0'"/> + <Exec Command="cl /nologo /I@(PyIncDirs, ' /I') /Fi$(PreProc) /P $(PySrcDir)qstrdefs.h"/> + <Exec Command="python $(PySrcDir)makeqstrdata.py $(PreProc) $(QstrDefs) > $(TmpFile)"/> + <MSBuild Projects="$(MSBuildThisFileFullPath)" Targets="CopyFileIfDifferent" Properties="SourceFile=$(TmpFile);DestFile=$(DestFile)"/> </Target> <!--see py/py-version.sh--> @@ -55,6 +53,7 @@ </PropertyGroup> <PropertyGroup> <DestFile>$(DestDir)py-version.h</DestFile> + <TmpFile>$(DestFile).tmp</TmpFile> </PropertyGroup> <ItemGroup> <Lines Include="// This file was generated by $([System.IO.Path]::GetFileName(`$(MsBuildThisFile)`))"/> @@ -62,11 +61,19 @@ <Lines Include="#define MICROPY_GIT_HASH "$(GitHash)""/> <Lines Include="#define MICROPY_BUILD_DATE "$([System.DateTime]::Now.ToString(`yyyy-MM-dd`))""/> </ItemGroup> - <WriteLinesToFile Lines="@(Lines)" File="$(DestFile).tmp" Overwrite="true"/> - <Exec Command="fc /B $(DestFile).tmp $(DestFile) > NUL 2>&1" IgnoreExitCode="true"> + <WriteLinesToFile Lines="@(Lines)" File="$(TmpFile)" Overwrite="true"/> + <MSBuild Projects="$(MSBuildThisFileFullPath)" Targets="CopyFileIfDifferent" Properties="SourceFile=$(TmpFile);DestFile=$(DestFile)"/> + </Target> + + <!--Copies SourceFile to DestFile only if SourceFile's content differs from DestFile's. + We use this to 'touch' the generated files only when they are really newer + so a build is only triggered if the generated content actually changed, + and not just because the file date changed since the last build--> + <Target Name="CopyFileIfDifferent"> + <Exec Command="fc /B $(SourceFile) $(DestFile) > NUL 2>&1" IgnoreExitCode="true"> <Output TaskParameter="ExitCode" PropertyName="FilesDiffer" /> </Exec> - <Copy SourceFiles="$(DestFile).tmp" DestinationFiles="$(DestFile)" Condition="'$(FilesDiffer)'!='0'"/> + <Copy SourceFiles="$(SourceFile)" DestinationFiles="$(DestFile)" Condition="'$(FilesDiffer)'!='0'"/> </Target> </Project> |