90 lines
3.0 KiB
C#
90 lines
3.0 KiB
C#
using Umbraco.Cms.Core.Logging;
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using Umbraco.Extensions;
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namespace Umbraco.Cms.Core.Composing;
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/// <summary>
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/// Determines the runtime hash based on file system paths to scan
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/// </summary>
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public class RuntimeHash : IRuntimeHash
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{
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private readonly IProfilingLogger _logger;
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private readonly RuntimeHashPaths _paths;
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private string? _calculated;
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public RuntimeHash(IProfilingLogger logger, RuntimeHashPaths paths)
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{
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_logger = logger;
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_paths = paths;
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}
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public string GetHashValue()
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{
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if (_calculated != null)
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{
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return _calculated;
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}
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IEnumerable<(FileSystemInfo, bool)> allPaths = _paths.GetFolders()
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.Select(x => ((FileSystemInfo)x, false))
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.Concat(_paths.GetFiles().Select(x => ((FileSystemInfo)x.Key, x.Value)));
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_calculated = GetFileHash(allPaths);
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return _calculated;
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}
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/// <summary>
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/// Returns a unique hash for a combination of FileInfo objects.
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/// </summary>
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/// <param name="filesAndFolders">A collection of files.</param>
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/// <returns>The hash.</returns>
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/// <remarks>
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/// Each file is a tuple containing the FileInfo object and a boolean which indicates whether to hash the
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/// file properties (false) or the file contents (true).
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/// </remarks>
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private string GetFileHash(IEnumerable<(FileSystemInfo fileOrFolder, bool scanFileContent)> filesAndFolders)
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{
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using (!_logger.IsEnabled(Logging.LogLevel.Debug) ? null : _logger.DebugDuration<RuntimeHash>("Determining hash of code files on disk", "Hash determined"))
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{
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// get the distinct file infos to hash
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var uniqInfos = new HashSet<string>();
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var uniqContent = new HashSet<string>();
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using var generator = new HashGenerator();
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foreach ((FileSystemInfo fileOrFolder, var scanFileContent) in filesAndFolders)
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{
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if (scanFileContent)
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{
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// add each unique file's contents to the hash
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// normalize the content for cr/lf and case-sensitivity
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if (uniqContent.Add(fileOrFolder.FullName))
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{
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if (File.Exists(fileOrFolder.FullName) == false)
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{
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continue;
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}
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using (FileStream fileStream = File.OpenRead(fileOrFolder.FullName))
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{
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var hash = fileStream.GetStreamHash();
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generator.AddCaseInsensitiveString(hash);
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}
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}
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}
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else
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{
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// add each unique folder/file to the hash
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if (uniqInfos.Add(fileOrFolder.FullName))
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{
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generator.AddFileSystemItem(fileOrFolder);
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}
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}
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}
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return generator.GenerateHash();
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}
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}
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}
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