双回路中的MSBuild？ [英] Double-Loop in msbuild?

问题描述

结果
我正在写的MSBuild这将使两批一步到位的脚本。结果
例如：2 ItemGroups

I'm writing a script for msbuild which should make two batches in one step.
Example: 2 ItemGroups

<ItemGroup>
 <GroupOne Include="1" />
 <GroupOne Include="2" />
</ItemGroup>

<ItemGroup>
 <GroupTwo Include="A" />
 <GroupTwo Include="B" />
</ItemGroup>

这两个组应在相互循环：

These two groups should be looped within each other:

<Message Text="%(GroupOne.Identity) %(GroupTwo.Identity)" />

我希望做的MSBuild的结果了两批给的

I hoped that msbuild makes the result up of both batches giving

1 A  
2 A  
1 B  
2 B  

作为结果。结果
但是，这并没有发生。相反，它返回以下没用的废物：

as result.
But that didn't happen. Instead, it returned the following useless crap:

1  
2  
  A  
  B  

做它像

<PropertyGroup>
  <GroupOneStep>%(GroupOne.Identity)</GroupOneStep>
</PropertyGroup>
<Message Text="$(GroupOneStep) %(GroupTwo.Identity)" />

品牌

2 A   
2 B

任何提示？我要疯了。 ： - （

Any hints? I'm going mad. :-(

PS：这里有一个关于该主题的博文 - 遗憾的是它并没有因为propsed那里工作：
<一href=\"http://blogs.msdn.com/b/giuliov/archive/2010/04/30/gotcha-msbuild-nested-loops-double-batching.aspx\">http://blogs.msdn.com/b/giuliov/archive/2010/04/30/gotcha-msbuild-nested-loops-double-batching.aspx

PS: Here's a blogpost about the topic - unfortunately it doesn't work as propsed there: http://blogs.msdn.com/b/giuliov/archive/2010/04/30/gotcha-msbuild-nested-loops-double-batching.aspx

推荐答案

尝试这个创建使用从组1中的身份，并从身份分配元数据到新的项目组组2的一个新的ItemGroup（或任何其它元数据）然后用配料遍历新组。

Try this to create a new ItemGroup using the identity from group 1 and assigning metadata to the new item group from the identity (or any other metadata) of group 2. Then use batching to iterate over the new group.

<CreateItem Include="@(GroupOne)" AdditionalMetadata="Option1=%(GroupTwo.Identity)">
    <Output ItemName="_Group_Merged" TaskParameter="Include"/>
</CreateItem>

<Message Text="%(_Group_Merged.Identity)-%(_Group_Merged.Option1)" />

如果你有两个以上的组，您可以添加createItem中的条目第三组并入_Group_Merged然后遍历，联合组。

If you have more than two groups you can add CreateItem entries to merge the third group into _Group_Merged and then iterate over that combined group.

<CreateItem Include="@(_Group_Merged)" AdditionalMetadata="Option2=%(GroupThree.Identity)">
    <Output ItemName="_Group_Merged2" TaskParameter="Include"/>
</CreateItem>

<Message Text="%(_Group_Merged2.Identity)-%(_Group_Merged2.Option1)-%(_Group_Merged2.Option2)" />

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