Msbuild ItemGroup意外地累積要複製的文件

我正在編寫一個msbuild腳本來部署多個目標。我正試圖重用一些元素，並獲得意想不到的行爲。Msbuild ItemGroup意外地累積要複製的文件

當我運行此文件凸出：從來源1目錄

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> 
    <Target Name="All" DependsOnTargets="DeployTarget1;DeployTarget2"> 
    </Target> 
    <Target Name="DeployTarget1"> 
    <PropertyGroup> 
     <RootDir>.\source1</RootDir> 
    </PropertyGroup> 
    <ItemGroup> 
     <DeployFiles Include="$(RootDir)\**\*.dll" Exclude="$(RootDir)\bin\C_*.xml" /> 
    </ItemGroup> 
    <Copy SourceFiles="@(DeployFiles)" DestinationFiles="@(DeployFiles->'D:\deploytest\dest1\%(RecursiveDir)%(Filename)%(Extension)')" /> 
    </Target> 
    <Target Name="DeployTarget2"> 
    <PropertyGroup> 
     <RootDir>.\source2</RootDir> 
    </PropertyGroup> 
    <ItemGroup> 
     <DeployFiles Include="$(RootDir)\**\*.dll" Exclude="$(RootDir)\bin\C_*.xml" /> 
    </ItemGroup> 
    <Copy SourceFiles="@(DeployFiles)" DestinationFiles="@(DeployFiles->'D:\deploytest\dest2\%(RecursiveDir)%(Filename)%(Extension)')" /> 
    </Target> 
</Project>

DeployTarget1將文件複製到遞歸作爲Dest1處我期待。

DeployTarget2副本都來源1 和源2到dest2，這不是我的預期。

D:\deploytest>msbuild /t:All test.proj 
Microsoft (R) Build Engine version 4.0.30319.17929 
[Microsoft .NET Framework, version 4.0.30319.18052] 
Copyright (C) Microsoft Corporation. All rights reserved. 

Build started 8/20/2013 2:37:17 PM. 
Project "D:\deploytest\test.proj" on node 1 (All target(s)). 
DeployTarget1: 
    Copying file from ".\source1\test1.dll" to "D:\deploytest\dest1\test1.dll". 
    copy /y ".\source1\test1.dll" "D:\deploytest\dest1\test1.dll" 
DeployTarget2: 
    Copying file from ".\source1\test1.dll" to "D:\deploytest\dest2\test1.dll". 
    copy /y ".\source1\test1.dll" "D:\deploytest\dest2\test1.dll" 
    Copying file from ".\source2\test2.dll" to "D:\deploytest\dest2\test2.dll". 
    copy /y ".\source2\test2.dll" "D:\deploytest\dest2\test2.dll" 
Done Building Project "D:\deploytest\test.proj" (All target(s)). 


Build succeeded. 
    0 Warning(s) 
    0 Error(s) 

Time Elapsed 00:00:00.06

有誰知道爲什麼會發生這種情況？
你能指點我關於這個「功能」的文檔嗎？

來源

2013-08-20 garrmark

ItemGroups are cummulative。每次引用項目組時，項目都會添加到現有組中。如果你想要明確的組，你需要給他們一個獨特的名字，或者你需要在使用前清除它們。

使用<DeployFiles Remove="**/*">

參見：https://stackoverflow.com/a/7915992/736079

來源

2013-08-20 19:08:55 jessehouwing

謝謝，我看到它在文檔中現在'項目「file2.cs」不更換的項目「file1.cs」;相反，文件名稱將附加到編譯項目類型的值列表中。在構建的評估階段，您無法從項目類型中移除項目。[MSBuild Items]（http://msdn.microsoft.com/zh-cn/library/ms171453.aspx） – garrmark

Msbuild ItemGroup意外地累積要複製的文件

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