在dotnet corecsproj中的AssemblyInfo，其属性来自Target

Question

我试图设置一个csproj，汇编信息由编译日期时间和 mercurial修订版自动生成。

  <!-- assembly info -->
  <PropertyGroup>
    <!-- versioning number: Maj.Min.TimeStamp.Rev -->
    <Major>2</Major>
    <Minor>90</Minor>
    <!-- define Build based on the compilation date: yyddd that sould be integer in [0..65535] -->
    <Build>$([System.DateTime]::Now.ToString(`yy`))$([System.DateTime]::Now.DayOfYear.ToString(`000`))</Build>
    <Revision>0</Revision>
    <Version>$(Major).$(Minor).$(Build)</Version>
    <AssemblyVersion>$(Major).$(Minor).$(Build).$(Revision)</AssemblyVersion>
    <FileVersion>$(Major).$(Minor).$(Build).$(Revision)</FileVersion>
  </PropertyGroup>

  <Import Project="..\packages\MSBuild.Mercurial.1.2.1\build\MSBuild.Mercurial.targets" Condition="Exists('..\packages\MSBuild.Mercurial.1.2.1\build\MSBuild.Mercurial.targets')" />
  <Target Name="GetHgRev" BeforeTargets="GenerateAssemblyInfo" DependsOnTargets="PrepareForBuild">
    <HgVersion LocalPath="$(SolutionDir)" Timeout="5000">
      <Output TaskParameter="Revision" PropertyName="Revision" />
    </HgVersion>
    <Message Text="Last revision from HG: $(Revision)" Importance="High" />
    <Message Text="$(Major).$(Minor).$(Build).$(Revision)" Importance="High" />
  </Target>

在控制台输出中，我得到了一些一致的东西。2.90.20160.239But只有$(Build)在tmp AssemblyInfo.cs中被正确使用，$(Revision)基本为0。

在以前的csproj格式（2015年）中，我在BeforeBuild目标中用显式cmd就能完成工作。

  <PropertyGroup>
    <AssemblyCompany>AAA</AssemblyCompany>
    <MyAppName>BBB</MyAppName>
    <Major>2</Major>
    <Minor>90</Minor>
    <Build>0</Build>
    <Revision>0</Revision>
  </PropertyGroup>
  <Target Name="BeforeBuild">
    <!-- get the Mercurial revision no -->
    <HgVersion LocalPath="$(SolutionDir)" Timeout="5000">
      <Output TaskParameter="Revision" PropertyName="Revision" />
    </HgVersion>
    <Message Text="Last revision from HG: $(Revision), today date $([System.DateTime]::Now.ToString(`yyyy.MM.dd`)) -&gt; $([System.DateTime]::Now.ToString(`yy`))$([System.DateTime]::Now.DayOfYear.ToString(`000`))" Importance="High" />
    <!-- define Build based on the compilation date: yyddd that sould be integer in [0..65535] -->
    <CreateProperty Value="$([System.DateTime]::Now.ToString(`yy`))$([System.DateTime]::Now.DayOfYear.ToString(`000`))">
      <Output PropertyName="Build" TaskParameter="Value" />
    </CreateProperty>
    <!-- generate version file, i.e. AssemblyInfo.cs used later for compilation -->
    <Message Text="Creating Version File: $(Major).$(Minor).$(Build).$(Revision)" Importance="High" />
    <AssemblyInfo CodeLanguage="CS" OutputFile=".\Properties\AssemblyInfo.cs" AssemblyTitle="AAA" AssemblyDescription="BBB" AssemblyCompany="$(AssemblyCompany)" AssemblyProduct="CCC" AssemblyCopyright="Copyright © DDD $([System.DateTime]::Now.ToString(`yyyy`))" AssemblyVersion="$(Major).$(Minor).$(Build).$(Revision)" AssemblyFileVersion="$(Major).$(Minor).$(Build).$(Revision)" />
  </Target>

你看这个问题有什么解决方法吗？

新的测试。

  <Import Project="..\packages\MSBuild.Mercurial.1.2.1\build\MSBuild.Mercurial.targets" Condition="Exists('..\packages\MSBuild.Mercurial.1.2.1\build\MSBuild.Mercurial.targets')" />
  <Target Name="GetHgRev" BeforeTargets="GenerateAssemblyInfo" DependsOnTargets="PrepareForBuild">
    <HgVersion LocalPath="$(SolutionDir)" Timeout="5000">
      <Output TaskParameter="Revision" PropertyName="Revision" />
    </HgVersion>
    <Message Text="Proposed number: $(Major).$(Minor).$(Build).$(Revision)" Importance="High" />
    <Message Text="AssemblyVersion before: $(AssemblyVersion)" Importance="High" />
    <PropertyGroup>
      <AssemblyVersion>$(Major).$(Minor).$(Build).$(Revision)</AssemblyVersion>
    </PropertyGroup>
    <Message Text="AssemblyVersion after: $(AssemblyVersion)" Importance="High" />
  </Target>

Kind regards,Charles

Answer 1

工程文件的静态部分（所有在 <Target>)在开始运行实际的构建逻辑（由target组成）之前被完全评估。

属性就像一个字符串到字符串的字典，所以 Version 和其他将被设置为字符串值，$()替换将被评估为字符串中的值，但在逻辑上不被保留。

这意味着一旦目标运行，你还需要再次更新你现在需要改变的所有属性(Version, AssemblyVersion, FileVersion 等）。) 您可以通过添加一个 <PropertyGroup> 后的目标内 HgVersion 任务调用。