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// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
namespace WixToolset.Core.WindowsInstaller.Unbind
{
using System;
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using WixToolset.Core.Native;
using WixToolset.Data;
using WixToolset.Data.WindowsInstaller;
using WixToolset.Data.WindowsInstaller.Rows;
using WixToolset.Msi;
internal class ExtractCabinetsCommand
{
public ExtractCabinetsCommand(Output output, Database database, string inputFilePath, string exportBasePath, string intermediateFolder, bool treatOutputAsModule = false)
{
this.Output = output;
this.Database = database;
this.InputFilePath = inputFilePath;
this.ExportBasePath = exportBasePath;
this.IntermediateFolder = intermediateFolder;
this.TreatOutputAsModule = treatOutputAsModule;
}
public string[] ExtractedFiles { get; private set; }
private Output Output { get; }
private Database Database { get; }
private string InputFilePath { get; }
private string ExportBasePath { get; }
private string IntermediateFolder { get; }
public bool TreatOutputAsModule { get; }
public void Execute()
{
var databaseBasePath = Path.GetDirectoryName(this.InputFilePath);
var cabinetFiles = new List<string>();
var embeddedCabinets = new SortedList();
// index all of the cabinet files
if (OutputType.Module == this.Output.Type || this.TreatOutputAsModule)
{
embeddedCabinets.Add(0, "MergeModule.CABinet");
}
else if (null != this.Output.Tables["Media"])
{
foreach (MediaRow mediaRow in this.Output.Tables["Media"].Rows)
{
if (null != mediaRow.Cabinet)
{
if (OutputType.Product == this.Output.Type ||
(OutputType.Transform == this.Output.Type && RowOperation.Add == mediaRow.Operation))
{
if (mediaRow.Cabinet.StartsWith("#", StringComparison.Ordinal))
{
embeddedCabinets.Add(mediaRow.DiskId, mediaRow.Cabinet.Substring(1));
}
else
{
cabinetFiles.Add(Path.Combine(databaseBasePath, mediaRow.Cabinet));
}
}
}
}
}
// extract the embedded cabinet files from the database
if (0 < embeddedCabinets.Count)
{
using (var streamsView = this.Database.OpenView("SELECT `Data` FROM `_Streams` WHERE `Name` = ?"))
{
foreach (int diskId in embeddedCabinets.Keys)
{
using (var record = new Record(1))
{
record.SetString(1, (string)embeddedCabinets[diskId]);
streamsView.Execute(record);
}
using (var record = streamsView.Fetch())
{
if (null != record)
{
// since the cabinets are stored in case-sensitive streams inside the msi, but the file system is not case-sensitive,
// embedded cabinets must be extracted to a canonical file name (like their diskid) to ensure extraction will always work
var cabinetFile = Path.Combine(this.IntermediateFolder, String.Concat("Media", Path.DirectorySeparatorChar, diskId.ToString(CultureInfo.InvariantCulture), ".cab"));
// ensure the parent directory exists
Directory.CreateDirectory(Path.GetDirectoryName(cabinetFile));
using (var fs = File.Create(cabinetFile))
{
int bytesRead;
var buffer = new byte[512];
while (0 != (bytesRead = record.GetStream(1, buffer, buffer.Length)))
{
fs.Write(buffer, 0, bytesRead);
}
}
cabinetFiles.Add(cabinetFile);
}
else
{
// TODO: warning about missing embedded cabinet
}
}
}
}
}
// extract the cabinet files
if (0 < cabinetFiles.Count)
{
// delete the directory and its files to prevent cab extraction due to an existing file
if (Directory.Exists(this.ExportBasePath))
{
Directory.Delete(this.ExportBasePath, true);
}
// ensure the directory exists or extraction will fail
Directory.CreateDirectory(this.ExportBasePath);
foreach (var cabinetFile in cabinetFiles)
{
try
{
var cabinet = new Cabinet(cabinetFile);
cabinet.Extract(this.ExportBasePath);
}
catch (FileNotFoundException)
{
throw new WixException(ErrorMessages.FileNotFound(new SourceLineNumber(this.InputFilePath), cabinetFile));
}
}
this.ExtractedFiles = Directory.GetFiles(this.ExportBasePath);
}
else
{
this.ExtractedFiles = new string[0];
}
}
}
}
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