<!-- defines the Zip task -->
<UsingTask TaskName="Zip" TaskFactory="CodeTaskFactory" AssemblyFile="$(MSBuildToolsPath)\Microsoft.Build.Tasks.v4.0.dll">
<ParameterGroup>
<InputFileNames ParameterType="Microsoft.Build.Framework.ITaskItem[]" Required="true" />
<OutputFileName ParameterType="System.String" Required="true" />
<OverwriteExistingFile ParameterType="System.Boolean" Required="false" />
</ParameterGroup>
<Task>
<Reference Include="System.IO.Compression" />
<Using Namespace="System.IO.Compression" />
<Code Type="Fragment" Language="cs">
<![CDATA[
const int BufferSize = 64 * 1024;
var buffer = new byte[BufferSize];
var fileMode = OverwriteExistingFile ? FileMode.Create : FileMode.CreateNew;
using (var outputFileStream = new FileStream(OutputFileName, fileMode))
{
using (var archive = new ZipArchive(outputFileStream, ZipArchiveMode.Create))
{
foreach (var inputFileName in InputFileNames.Select(f => f.ItemSpec))
{
var archiveEntry = archive.CreateEntry(Path.GetFileName(inputFileName));
using (var fs = new FileStream(inputFileName, FileMode.Open))
{
using (var zipStream = archiveEntry.Open())
{
int bytesRead = -1;
while ((bytesRead = fs.Read(buffer, 0, BufferSize)) > 0)
{
zipStream.Write(buffer, 0, bytesRead);
}
}
}
}
}
}
]]>
</Code>
</Task>
</UsingTask>