Library.Common.tasks

<?xml version="1.0" encoding="utf-8"?>
<Project>
  <!-- Waits for a maximum period of time until a file exists. -->
  <UsingTask
    TaskName="WaitFileExists"
    TaskFactory="CodeTaskFactory"
    AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.Core.dll">
    <ParameterGroup>
      <Filename Required="true" />
      <TimeoutSeconds ParameterType="System.Int32" Required="true" />
    </ParameterGroup>
    <Task>
      <Using Namespace="System.Threading"/>
      <Using Namespace="System.IO"/>
      <Code Type="Fragment" Language="cs">
        <![CDATA[
        while (!File.Exists(Filename) && TimeoutSeconds > 0)
        {
            Thread.Sleep(1000);
            TimeoutSeconds--;
        }
        ]]>
      </Code>
    </Task>
  </UsingTask>

  <!-- Generates a build number. -->
  <UsingTask
    TaskName="CreateBuildNumber"
    TaskFactory="CodeTaskFactory"
    AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.Core.dll">
    <ParameterGroup>
      <Result ParameterType="System.Int32" Output="true" />
    </ParameterGroup>
    <Task>
      <Code Type="Fragment" Language="cs">
        <![CDATA[
        DateTime now = DateTime.UtcNow;
        int daysFromPriorYear = (int)(now.Date - new DateTime(now.Year - 1, 1, 1).Date).TotalDays;
        int secondsSinceMidnight = (int)now.TimeOfDay.TotalSeconds;
        Result = daysFromPriorYear * 1000000 + secondsSinceMidnight;
        ]]>
      </Code>
    </Task>
  </UsingTask>

  <!-- Loads XML elements from the specified files and returns them as task items. -->
  <UsingTask
    TaskName="GetXmlElements"
    TaskFactory="CodeTaskFactory"
    AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.Core.dll" >
    <ParameterGroup>
      <Files ParameterType="Microsoft.Build.Framework.ITaskItem[]" Required="true" />
      <ElementName Required="true" />
      <IdentityAttributeName Required="true" />
      <Result ParameterType="Microsoft.Build.Framework.ITaskItem[]" Output="true" />
    </ParameterGroup>
    <Task>
      <Reference Include="System.Xml"/>
      <Reference Include="System.Xml.Linq"/>
      <Using Namespace="System.Collections.Generic"/>
      <Using Namespace="System.Xml.Linq"/>
      <Code Type="Fragment" Language="cs">
        <![CDATA[
    var results = new List<ITaskItem>();

    for (int i = 0; i < Files.Length; i++)
    {
        ITaskItem fileItem = Files[i];
        string path = fileItem.GetMetadata("FullPath");
        XElement xml = XElement.Load(path);
        var elements = xml.Descendants(ElementName);

        foreach (XElement element in elements)
        {
            XAttribute identityAttribute = element.Attribute(IdentityAttributeName);
        
            if (identityAttribute == null) continue;

            var item = new TaskItem(identityAttribute.Value);

            foreach (XAttribute attribute in element.Attributes())
            {
                item.SetMetadata(attribute.Name.LocalName, attribute.Value);
            }

            foreach (XElement childElement in element.Elements())
            {
                item.SetMetadata(childElement.Name.LocalName, childElement.Value);
            }

            results.Add(item);
        }
    }
    
    Result = results.ToArray();
]]>
      </Code>
    </Task>
  </UsingTask>
</Project>