MSBuild ReadLinesFromFileFile一行上的所有文本 [英] MSBuild ReadLinesFromFile all text on one line

问题描述

当我在MSBUILD中的文件上执行ReadLinesFromFile并再次输出该文件时，我将所有文本都放在一行中。所有的回车和LineFeeds都被删除。

When I do a ReadLinesFromFile on a file in MSBUILD and go to output that file again, I get all the text on one line. All the Carriage returns and LineFeeds are stripped out.

<Project DefaultTargets = "Deploy"
xmlns="http://schemas.microsoft.com/developer/msbuild/2003" >
<Import  Project="$(MSBuildExtensionsPath)\MSBuildCommunityTasks\MSBuild.Community.Tasks.Targets"/>

<ItemGroup>
    <MyTextFile Include="$(ReleaseNotesDir)$(NewBuildNumber).txt"/>
</ItemGroup>

<Target Name="ReadReleaseNotes">
    <ReadLinesFromFile
        File="@(MyTextFile)" >
        <Output
            TaskParameter="Lines"
            ItemName="ReleaseNoteItems"/>
    </ReadLinesFromFile>
</Target>

<Target Name="MailUsers" DependsOnTargets="ReadReleaseNotes" >
    <Mail SmtpServer="$(MailServer)"
        To="$(MyEMail)"
        From="$(MyEMail)"
        Subject="Test Mail Task"
        Body="@(ReleaseNoteItems)" />
</Target>
<Target Name="Deploy">
    <CallTarget Targets="MailUsers" />
</Target>

</Project>

我得到的文件通常看起来像这样

I get the text from the file which normally looks like this

- New Deployment Tool for BLAH

- Random other stuff()""

像这样出来

- New Deployment Tool for BLAH;- Random other stuff()""

我知道ReadLinesFromFile的代码将一次拉一条线，并删除回车。

I know that the code for ReadLinesFromFile will pull the data in one line at a time and strip out the carriage returns.

有没有办法让他们回来？
所以我的电子邮件看起来都很好格式？

Is there a way to put them back in? So my e-mail looks all nicely formatted?

谢谢

推荐答案

这里的问题是您以不想要的方式使用 ReadLinesFromFile 任务。

ReadLinesFromFile任务

从文本文件中读取项目的列表。

所以不仅仅是从文件中读取所有的文本，而是从一个文件读取个别的项目并返回一个ITaskItems的项目组。每当您使用 @（）语法输出项目列表时，您将得到一个分隔的列表，其默认值为分号。这个例子说明了这个行为：

So it's not just reading all the text from a file, it's reading individual items from a file and returning an item group of ITaskItems. Whenever you output a list of items using the @() syntax you will get a separated list, the default of which is a semicolon. This example illustrates this behavior:

<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build"    xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="3.5">

    <ItemGroup>
        <Color Include="Red" />
        <Color Include="Blue" />
        <Color Include="Green" />
</ItemGroup>

<Target Name="Build">
        <Message Text="ItemGroup Color: @(Color)" />
</Target>

</Project>

输出如下所示：

  ItemGroup Color: Red;Blue;Green

最好的解决方案是编写一个MSBuild任务，将一个文件读入一个属性，作为一个不是项目列表的字符串，这不是你要求的。你问是否有一个方式将它们放回来，并且使用 MSBuild变换。

So while the best solution to your problem is to write an MSBuild task that reads a file into a property as a string an not a list of items, that's really not what you asked for. You asked if there was a way to put them back, and there is using MSBuild Transforms.

变换用于从另一个创建一个列表，并且还可以使用自定义分隔符进行转换。所以答案是使用 ReadItemsFromFile 将您的列表转换为带有换行符的另一个列表。这是一个例子：

Transforms are used to create one list from another and also have the ability to transform using a custom separator. So the answer is to transform your list read in using ReadItemsFromFile into another list with newlines. Here is an example that does just that:

<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="3.5">

    <ItemGroup>
        <File Include="$(MSBuildProjectDirectory)\Test.txt" />
    </ItemGroup>

    <Target Name="Build">
        <ReadLinesFromFile File="@(File)">
            <Output TaskParameter="Lines" ItemName="FileContents" />
        </ReadLinesFromFile>

        <Message Text="FileContents: @(FileContents)" />
        <Message Text="FileContents Transformed: @(FileContents->'%(Identity)', '%0a%0d')" />
    </Target>

</Project>

Test.text看起来像：

Test.text looks like:

Red
Green
Blue

输出如下所示：

[C:\temp]:: msbuild test.proj
Microsoft (R) Build Engine Version 3.5.21022.8
[Microsoft .NET Framework, Version 2.0.50727.1433]
Copyright (C) Microsoft Corporation 2007. All rights reserved.

Build started 11/8/2008 8:16:59 AM.
Project "C:\temp\test.proj" on node 0 (default targets).
  FileContents: Red;Green;Blue
  FileContents Transformed: Red
Green
Blue
Done Building Project "C:\temp\test.proj" (default targets).


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

Time Elapsed 00:00:00.03

这里发生了两件事。

@(FileContents->'%(Identity)', '%0a%0d')   

<我们正在使用相同的值（ Identity ）将列表从一个类型转换为另一个类型，但是自定义分隔符'％0a％0d'

• 我们正在使用 MSBuild Escaping 以转义换行符（％0a ）和回车符（％0d ）


• We are transforming the list from one type to another using the same values (Identity) but a custom separator '%0a%0d'
• We are using MSBuild Escaping to escape the line feed (%0a) and carriage return (%0d)

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