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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.Bind
{
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using WixToolset.Data;
using WixToolset.Extensibility;
using WixToolset.Extensibility.Data;
internal class FileResolver
{
private const string BindPathOpenString = "!(bindpath.";
private FileResolver(IEnumerable<BindPath> bindPaths)
{
this.BindPaths = (bindPaths ?? Array.Empty<BindPath>()).ToLookup(b => b.Stage);
this.RebaseTarget = this.BindPaths[BindStage.Target].Any();
this.RebaseUpdated = this.BindPaths[BindStage.Updated].Any();
}
public FileResolver(IEnumerable<BindPath> bindPaths, IEnumerable<IResolverExtension> extensions) : this(bindPaths)
{
this.ResolverExtensions = extensions ?? Array.Empty<IResolverExtension>();
}
public FileResolver(IEnumerable<BindPath> bindPaths, IEnumerable<ILibrarianExtension> extensions) : this(bindPaths)
{
this.LibrarianExtensions = extensions ?? Array.Empty<ILibrarianExtension>();
}
private ILookup<BindStage, BindPath> BindPaths { get; }
public bool RebaseTarget { get; }
public bool RebaseUpdated { get; }
private IEnumerable<IResolverExtension> ResolverExtensions { get; }
private IEnumerable<ILibrarianExtension> LibrarianExtensions { get; }
public string Resolve(SourceLineNumber sourceLineNumbers, IntermediateTupleDefinition tupleDefinition, string source)
{
foreach (var extension in this.LibrarianExtensions)
{
var resolved = extension.Resolve(sourceLineNumbers, tupleDefinition, source);
if (null != resolved)
{
return resolved;
}
}
return this.ResolveUsingBindPaths(source, tupleDefinition, sourceLineNumbers, BindStage.Normal);
}
/// <summary>
/// Resolves the source path of a file using binder extensions.
/// </summary>
/// <param name="source">Original source value.</param>
/// <param name="type">Optional type of source file being resolved.</param>
/// <param name="sourceLineNumbers">Optional source line of source file being resolved.</param>
/// <param name="bindStage">The binding stage used to determine what collection of bind paths will be used</param>
/// <returns>Should return a valid path for the stream to be imported.</returns>
public string ResolveFile(string source, IntermediateTupleDefinition tupleDefinition, SourceLineNumber sourceLineNumbers, BindStage bindStage)
{
foreach (var extension in this.ResolverExtensions)
{
var resolved = extension.ResolveFile(source, tupleDefinition, sourceLineNumbers, bindStage);
if (null != resolved)
{
return resolved;
}
}
return this.ResolveUsingBindPaths(source, tupleDefinition, sourceLineNumbers, bindStage);
}
private string ResolveUsingBindPaths(string source, IntermediateTupleDefinition tupleDefinition, SourceLineNumber sourceLineNumbers, BindStage bindStage)
{
string resolved = null;
// If the file exists, we're good to go.
if (CheckFileExists(source))
{
resolved = source;
}
else if (Path.IsPathRooted(source)) // path is rooted so bindpaths won't help, bail since the file apparently doesn't exist.
{
resolved = null;
}
else // not a rooted path so let's try applying all the different source resolution options.
{
string bindName = String.Empty;
var path = source;
string pathWithoutSourceDir = null;
if (source.StartsWith(BindPathOpenString, StringComparison.Ordinal))
{
int closeParen = source.IndexOf(')', BindPathOpenString.Length);
if (-1 != closeParen)
{
bindName = source.Substring(BindPathOpenString.Length, closeParen - BindPathOpenString.Length);
path = source.Substring(BindPathOpenString.Length + bindName.Length + 1); // +1 for the closing brace.
path = path.TrimStart('\\'); // remove starting '\\' char so the path doesn't look rooted.
}
}
else if (source.StartsWith("SourceDir\\", StringComparison.Ordinal) || source.StartsWith("SourceDir/", StringComparison.Ordinal))
{
pathWithoutSourceDir = path.Substring(10);
}
var bindPaths = this.BindPaths[bindStage];
foreach (var bindPath in bindPaths)
{
if (!String.IsNullOrEmpty(pathWithoutSourceDir))
{
var filePath = Path.Combine(bindPath.Path, pathWithoutSourceDir);
if (CheckFileExists(filePath))
{
resolved = filePath;
}
}
if (String.IsNullOrEmpty(resolved))
{
var filePath = Path.Combine(bindPath.Path, path);
if (CheckFileExists(filePath))
{
resolved = filePath;
}
}
}
}
if (null == resolved)
{
throw new WixFileNotFoundException(sourceLineNumbers, source, tupleDefinition.Name);
}
// Didn't find the file.
return resolved;
}
private static bool CheckFileExists(string path)
{
try
{
return File.Exists(path);
}
catch (ArgumentException)
{
throw new WixException(ErrorMessages.IllegalCharactersInPath(path));
}
}
}
}
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