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Copy pathFakeFileSystemTree.cs
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Copy pathFakeFileSystemTree.cs
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341 lines (283 loc) · 11.1 KB
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using Cake.Core;
using Cake.Core.IO;
namespace Cake.Testing
{
internal sealed class FakeFileSystemTree
{
private readonly FakeDirectory _root;
public PathComparer Comparer { get; }
public FakeFileSystemTree(ICakeEnvironment environment)
{
if (environment == null)
{
throw new ArgumentNullException(nameof(environment));
}
if (environment.WorkingDirectory == null)
{
throw new ArgumentException("Working directory not set.");
}
if (environment.WorkingDirectory.IsRelative)
{
throw new ArgumentException("Working directory cannot be relative.");
}
Comparer = new PathComparer(environment.Platform.IsUnix());
_root = new FakeDirectory(this, "/") { Exists = true, LastWriteTime = DateTime.Now };
_root.Create();
}
public FakeDirectory CreateDirectory(DirectoryPath path)
{
return CreateDirectory(new FakeDirectory(this, path));
}
public FakeDirectory CreateDirectory(FakeDirectory directory)
{
var path = directory.Path;
var queue = new Queue<string>(path.Segments);
FakeDirectory current = null;
var children = _root.Content;
while (queue.Count > 0)
{
// Get the segment.
var currentSegment = queue.Dequeue();
var parent = current;
// Calculate the current path.
path = parent != null ? parent.Path.Combine(currentSegment) : new DirectoryPath(currentSegment);
if (!children.Directories.ContainsKey(path))
{
current = queue.Count == 0 ? directory : new FakeDirectory(this, path);
current.Parent = parent ?? _root;
current.Hidden = false;
children.Add(current);
}
else
{
current = children.Directories[path];
}
current.Exists = true;
current.LastWriteTime = DateTime.Now;
children = current.Content;
}
return directory;
}
public void CreateFile(FakeFile file)
{
// Get the directory that the file exists in.
var directory = FindDirectory(file.Path.GetDirectory());
if (directory == null)
{
file.Exists = false;
throw new DirectoryNotFoundException(string.Format(CultureInfo.InvariantCulture, "Could not find a part of the path '{0}'.", file.Path.FullPath));
}
if (!directory.Content.Files.ContainsKey(file.Path))
{
// Add the file to the directory.
file.Exists = true;
file.LastWriteTime = DateTime.Now;
directory.Content.Add(file);
}
}
public void DeleteDirectory(FakeDirectory fakeDirectory, bool recursive)
{
var root = new Stack<FakeDirectory>();
var result = new Stack<FakeDirectory>();
if (fakeDirectory.Exists)
{
root.Push(fakeDirectory);
}
while (root.Count > 0)
{
var node = root.Pop();
result.Push(node);
var directories = node.Content.Directories;
if (directories.Count > 0 && !recursive)
{
throw new IOException("The directory is not empty.");
}
foreach (var child in directories)
{
root.Push(child.Value);
}
}
while (result.Count > 0)
{
var directory = result.Pop();
var files = directory.Content.Files.Select(x => x).ToArray();
if (files.Length > 0 && !recursive)
{
throw new IOException("The directory is not empty.");
}
foreach (var file in files)
{
// Delete the file.
DeleteFile(file.Value);
}
// Delete the directory.
directory.Parent.Content.Remove(directory);
directory.Exists = false;
}
}
public void DeleteFile(FakeFile file)
{
if (!file.Exists)
{
throw new FileNotFoundException("File does not exist.", file.Path.FullPath);
}
if (file.Attributes.HasFlag(FileAttributes.ReadOnly))
{
throw new IOException($"Cannot delete readonly file '{file.Path.FullPath}'.");
}
// Find the directory.
var directory = FindDirectory(file.Path.GetDirectory());
// Remove the file from the directory.
directory.Content.Remove(file);
// Reset all properties.
file.Exists = false;
file.Content = null;
file.ContentLength = 0;
}
public FakeDirectory FindDirectory(DirectoryPath path)
{
// Want the root?
if (path.Segments.Length == 0)
{
return _root;
}
var queue = new Queue<string>(path.Segments);
FakeDirectory current = null;
var children = _root.Content;
while (queue.Count > 0)
{
// Set the parent.
var parent = current;
// Calculate the current path.
var segment = queue.Dequeue();
path = parent != null ? parent.Path.Combine(segment) : new DirectoryPath(segment);
// Find the current path.
if (!children.Directories.ContainsKey(path))
{
return null;
}
current = children.Directories[path];
children = current.Content;
}
return current;
}
public FakeFile FindFile(FilePath path)
{
var directory = FindDirectory(path.GetDirectory());
if (directory != null)
{
if (directory.Content.Files.ContainsKey(path))
{
return directory.Content.Files[path];
}
}
return null;
}
public void CopyFile(FakeFile file, FilePath destination, bool overwrite)
{
if (!file.Exists)
{
throw new FileNotFoundException("File does not exist.");
}
// Already exists?
var destinationFile = FindFile(destination);
if (destinationFile != null)
{
if (!overwrite)
{
const string format = "{0} exists and overwrite is false.";
var message = string.Format(CultureInfo.InvariantCulture, format, destination.FullPath);
throw new IOException(message);
}
}
// Directory exists?
var directory = FindDirectory(destination.GetDirectory());
if (directory == null || !directory.Exists)
{
throw new DirectoryNotFoundException("The destination path {0} does not exist.");
}
// Make sure the file exist.
if (destinationFile == null)
{
destinationFile = new FakeFile(this, destination);
}
// Copy the data from the original file to the destination.
using (var input = file.OpenRead())
using (var output = destinationFile.OpenWrite())
{
input.CopyTo(output);
}
}
public void MoveFile(FakeFile fakeFile, FilePath destination)
{
// Copy the file to the new location.
CopyFile(fakeFile, destination, false);
// Delete the original file.
fakeFile.Delete();
}
public void MoveDirectory(FakeDirectory fakeDirectory, DirectoryPath destination)
{
var root = new Stack<FakeDirectory>();
var result = new Stack<FakeDirectory>();
if (string.IsNullOrEmpty(destination.FullPath))
{
throw new ArgumentException("The destination directory is empty.");
}
if (fakeDirectory.Path.Equals(destination))
{
throw new IOException("The directory being moved and the destination directory have the same name.");
}
if (FindDirectory(destination) != null)
{
throw new IOException("The destination directory already exists.");
}
string destinationParentPathStr = string.Join("/", destination.Segments.Take(destination.Segments.Length - 1).DefaultIfEmpty("/"));
DirectoryPath destinationParentPath = new DirectoryPath(destinationParentPathStr == string.Empty ? "/" : destinationParentPathStr);
if (FindDirectory(destinationParentPath) == null)
{
throw new DirectoryNotFoundException("The parent destination directory " + destinationParentPath.FullPath + " could not be found.");
}
if (fakeDirectory.Exists)
{
root.Push(fakeDirectory);
}
// Create destination directories and move files
while (root.Count > 0)
{
var node = root.Pop();
result.Push(node);
// Create destination directory
DirectoryPath relativePath = fakeDirectory.Path.GetRelativePath(node.Path);
DirectoryPath destinationPath = destination.Combine(relativePath);
CreateDirectory(destinationPath);
var files = node.Content.Files.Select(x => x).ToArray();
foreach (var file in files)
{
// Move the file.
MoveFile(file.Value, destinationPath.CombineWithFilePath(file.Key.GetFilename()));
}
var directories = node.Content.Directories;
foreach (var child in directories)
{
root.Push(child.Value);
}
}
// Delete source directories
while (result.Count > 0)
{
var directory = result.Pop();
// Delete the directory.
directory.Parent.Content.Remove(directory);
directory.Exists = false;
}
}
}
}
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