我正在尝试比较msbuild中的两个日期时间戳。我做了以下事情:
<CreateItem Include="@(Compile)->'@(Compile).cache'"
Condition="('%(Compile.ExcludeFromStyleCop)' != 'true') and ('%(Compile.ExcludeFromSourceAnalysis)' != 'true') and (@(Compile.ModifiedTime) > @(Compile.cache.ModifiedTime))">
<Output TaskParameter="Include" ItemName="StyleCopFiles"/>
</CreateItem>
然而,它引发了以下内容:
错误MSB4086:尝试进行数值比较 “@(Compile.ModifiedTime)”评估为“@(Compile.ModifiedTime)” 而不是数字,条件为“('%(Compile.ExcludeFromStyleCop)' !='true')和('%(Compile.ExcludeFromSourceAnalysis)'!='true')和 (@(Compile.ModifiedTime)&gt; @(Compile.cache.ModifiedTime))“。 [C:\ dev的\易于\ DotNetMvc \ SRC \ Apt.Lib.Data.Elmah \ Apt.Lib.Data.Elmah.csproj]
如何比较msbuild中的两个日期时间戳?
答案 0 :(得分:5)
尝试使用内联任务:(我想是msbuild v4 +)(我没有测试过)
<UsingTask
TaskName="CompareDates"
TaskFactory="CodeTaskFactory"
AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll" >
<ParameterGroup>
<FirstDate ParameterType="System.DateTime" Required="true" />
<SecondDate ParameterType="System.DateTime" Required="true" />
<Result ParameterType=" "System.Int32" Output="true" />
</ParameterGroup>
<Task>
<Using Namespace="System"/>
<Code Type="Fragment" Language="cs">
<![CDATA[
Log.LogMessage("First Date: " + FirstDate, MessageImportance.High);
Log.LogMessage("Second Date: " + SecondDate, MessageImportance.High);
Result = DateTime.Compare(FirstDate, SecondDate);
]]>
</Code>
</Task>
</UsingTask>
MsBuild脚本中的用法:
<CompareDates FirstDate="$(FirstDate)" SecondDate="$(SecondDate)">
<Output TaskParameter="Result" PropertyName="DateCompareResult"/>
</CompareDates>
<Copy Condition="$(DateCompareResult)=='0'" .../>
答案 1 :(得分:4)
这里更简单的解决方案是使用属性函数将DateTime对象转换为整数以访问Ticks属性。
对于命名文件:
$([System.IO.File]::GetLastWriteTime('SomeFile.bin').Ticks)
或来自项目元数据:
$([System.DateTime]::Parse('%(ItemGroup.ModifiedTime)').Ticks)
然后,您可以使用条件表达式比较项目,如下所示:
Condition="($([System.DateTime]::Parse('%(ItemGroup.ModifiedTime)').Ticks) > $([System.IO.File]::GetLastWriteTime('SomeFile').Ticks)))"
对于这里的问题,我认为这应该有效:
Condition="($([System.DateTime]::Parse('%(Compile.ModifiedTime)').Ticks) > ($([System.DateTime]::Parse('%(Compile.cache.ModifiedTime)').Ticks)"
答案 2 :(得分:1)
以下是我们的用途:
<UsingTask
TaskName="CompareDates"
TaskFactory="CodeTaskFactory"
AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll" >
<ParameterGroup>
<FileList ParameterType="Microsoft.Build.Framework.ITaskItem[]" Required="true" />
<CacheFile ParameterType="System.String" Required="true" />
<Result ParameterType="Microsoft.Build.Framework.ITaskItem[]" Output="true" />
</ParameterGroup>
<Task>
<Using Namespace="System"/>
<Code Type="Fragment" Language="cs">
<![CDATA[
var modifiedFiles = new List<ITaskItem>();
//If the cache file exists, only return files that have been edited more recently than it
if(File.Exists(CacheFile))
{
DateTime cacheTimeStamp = File.GetLastWriteTime(CacheFile);
foreach(var file in FileList)
{
if(DateTime.Compare(DateTime.Parse(file.GetMetadata("ModifiedTime")), cacheTimeStamp) > 0)
{
modifiedFiles.Add(file);
}
}
Result = modifiedFiles.ToArray();
}
//Otherwise, return all files
else
{
Result = FileList;
}
]]>
</Code>
</Task>
</UsingTask>
我们使用如下:
<CompareDates FileList="@(Compile)" CacheFile="My.StyleCop.Cache">
<Output TaskParameter="Result" ItemName="ChangedFiles"/>
</CompareDates>
更新缓存(执行stylecop任务后):
<Touch
Files="My.StyleCop.cache"
AlwaysCreate="true"
Condition="'$(StyleCopViolationCount)' == '0'"/>
<CreateItem Include="Apt.StyleCop.cache">`enter code here`
<Output TaskParameter="Include" ItemName="FileWrites"/>
</CreateItem>