Qt Moc在msbuild下并行处理多个文件 [英] Qt Moc'ing multiple files in parallel under msbuild

问题描述

使用Qt Visual Studio插件似乎可以几乎所有方式处理几乎所有事情.不幸的是，它使用msbuild中的CustomBuild步骤进行移动.这导致了一个接一个的串行移动.有没有办法说服msbuild并行执行它们-我已经厌倦了像我一样坐在它们的桂冠上的7个内核.

Using the Qt Visual studio plugin it seems to take care of most of almost everything in a seemless manner. Unfortunately it does the moc'ing using a CustomBuild step in msbuild. This results in a serial moc'ing, one after another. Is there a way to convince msbuild to do them in parallel - I'm tired of 7 cores sitting on their laurels like me.

我已经看过msbuild的BuildInParallel，但是我不确定如何在此处应用它.

I've seen msbuild's BuildInParallel, but I'm not sure how to make that apply here.

msbuild片段:

msbuild snippet:

<Project>
...
  <ItemGroup>
    <CustomBuild Include="a_class4.h">
      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(QTDIR)\bin\moc.exe;%(FullPath)</AdditionalInputs>
      <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Moc%27ing %(Identity)...</Message>
      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">.\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp</Outputs>
      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">"$(QTDIR)\bin\moc.exe"  "%(FullPath)" -o ".\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp"  -DUNICODE -DWIN32 -DQT_LARGEFILE_SUPPORT -DQT_CORE_LIB -DQT_GUI_LIB "-I." "-I.\GeneratedFiles" "-I$(QTDIR)\include" "-I.\GeneratedFiles\$(ConfigurationName)\." "-I$(QTDIR)\include\qtmain" "-I$(QTDIR)\include\QtCore" "-I$(QTDIR)\include\QtGui" "-I." "-I." "-I." "-I."</Command>
    </CustomBuild>
    <CustomBuild Include="a_class3.h">
      <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(QTDIR)\bin\moc.exe;%(FullPath)</AdditionalInputs>
      <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Moc%27ing %(Identity)...</Message>
      <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">.\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp</Outputs>
      <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">"$(QTDIR)\bin\moc.exe"  "%(FullPath)" -o ".\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp"  -DUNICODE -DWIN32 -DQT_LARGEFILE_SUPPORT -DQT_CORE_LIB -DQT_GUI_LIB "-I." "-I.\GeneratedFiles" "-I$(QTDIR)\include" "-I.\GeneratedFiles\$(ConfigurationName)\." "-I$(QTDIR)\include\qtmain" "-I$(QTDIR)\include\QtCore" "-I$(QTDIR)\include\QtGui" "-I." "-I." "-I." "-I."</Command>
    </CustomBuild>
  </ItemGroup>
 ...
</Project>

推荐答案

我对Visual Studio项目不是很熟悉，所以不知道"CustomBuild" ItemGroup名称及其元数据名称是否有意义.如果这样做，您可能需要

I am not very familiar with Visual Studio projects ... so don't know if the "CustomBuild" ItemGroup name and its metadata names bear significance. If they do, you might need to

1. 将ItemGroup名称修改为其他名称
2. 识别可处理该问题的msbuild目标文件并对其进行修复以进行并行处理

这是一个独立的msbuild文件，可以并行执行事务.

Here is a standalone msbuild file that can execute things in parallel.

注意:

1. 已添加ping -n 30 -w 1000 127.0.0.2>nul命令，以便我可以启动进程浏览器并找到足够的时间来计算产生了ping.exe实例的数量.
2. 我尝试ping 127.0.0.2，因为我希望ping不能更早完成.
3. 文件中没有发生任何实际有用的事情……仅回显属性作为概念证明.

1. The ping -n 30 -w 1000 127.0.0.2>nul command has been added so that I could launch process explorer and find enough time to count how many instances of ping.exe were spawned.
2. I was trying to ping 127.0.0.2 because I wanted ping not to finish earlier.
3. There is nothing practically useful happening in the file ... only echoing properties as a proof of concept.

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="RunMe">
    <ItemGroup>
        <CustomBuild Include="a_class4.h">
            <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(QTDIR)\bin\moc.exe;%(FullPath)</AdditionalInputs>
            <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Moc%27ing %(Identity)...</Message>
            <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">.\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp</Outputs>
            <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">"$(QTDIR)\bin\moc.exe"  "%(FullPath)" -o ".\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp"  -DUNICODE -DWIN32 -DQT_LARGEFILE_SUPPORT -DQT_CORE_LIB -DQT_GUI_LIB "-I." "-I.\GeneratedFiles" "-I$(QTDIR)\include" "-I.\GeneratedFiles\$(ConfigurationName)\." "-I$(QTDIR)\include\qtmain" "-I$(QTDIR)\include\QtCore" "-I$(QTDIR)\include\QtGui" "-I." "-I." "-I." "-I."</Command>
        </CustomBuild>
        <CustomBuild Include="a_class3.h">
            <AdditionalInputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">$(QTDIR)\bin\moc.exe;%(FullPath)</AdditionalInputs>
            <Message Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Moc%27ing %(Identity)...</Message>
            <Outputs Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">.\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp</Outputs>
            <Command Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">"$(QTDIR)\bin\moc.exe"  "%(FullPath)" -o ".\GeneratedFiles\$(ConfigurationName)\moc_%(Filename).cpp"  -DUNICODE -DWIN32 -DQT_LARGEFILE_SUPPORT -DQT_CORE_LIB -DQT_GUI_LIB "-I." "-I.\GeneratedFiles" "-I$(QTDIR)\include" "-I.\GeneratedFiles\$(ConfigurationName)\." "-I$(QTDIR)\include\qtmain" "-I$(QTDIR)\include\QtCore" "-I$(QTDIR)\include\QtGui" "-I." "-I." "-I." "-I."</Command>
        </CustomBuild>
    </ItemGroup>
    <Target Name="RunMe">
        <Message Text="First populate an ItemGroup such that we can use it for parallel processing"/>
        <ItemGroup>
            <InputForParallelInvoke Include="$(MSBuildThisFileFullPath)">
                <Properties>InputFile=%(CustomBuild.Identity);
                        AdditionalInputs=%(CustomBuild.AdditionalInputs);
                        Message=%(CustomBuild.Message);
                        Outputs=%(CustomBuild.Outputs);
                        Command=%(CustomBuild.Command)</Properties>

            </InputForParallelInvoke>
        </ItemGroup>
        <MSBuild Projects="@(InputForParallelInvoke)" Targets="InvokeInParallel" BuildInParallel="True" />
    </Target>
    <Target Name="InvokeInParallel">
        <Exec Command="ping -n 30 -w 1000 127.0.0.2>nul &amp; echo Properties=$(InputFile) ##### $(AdditionalInputs) ##### $(Message) ##### $(Outputs) ##### $(Command)"/>
    </Target>
</Project>

当我通过msbuild调用它时，msbuild /m \path\to\file /p:Configuration=Debug;Platform=Win32我看到了ping.exe的两个实例.

When I invoke it on via msbuild thus msbuild /m \path\to\file /p:Configuration=Debug;Platform=Win32 I see 2 instances of ping.exe.

希望这有助于解决您的问题.

Hope this helps solve your problem.

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