/// <summary>
/// Returns a unique hash for a combination of FileInfo objects.
/// </summary>
/// <param name="filesAndFolders">A collection of files.</param>
/// <param name="logger">A profiling logger.</param>
/// <returns>The hash.</returns>
// internal for tests
public static string GetFileHash(IEnumerable <FileSystemInfo> filesAndFolders, IProfilingLogger logger)
{
using (logger.DebugDuration <TypeLoader>("Determining hash of code files on disk", "Hash determined"))
{
using (var generator = new HashGenerator())
{
// get the distinct file infos to hash
var uniqInfos = new HashSet <string>();
foreach (var fileOrFolder in filesAndFolders)
{
if (uniqInfos.Contains(fileOrFolder.FullName))
{
continue;
}
uniqInfos.Add(fileOrFolder.FullName);
generator.AddFileSystemItem(fileOrFolder);
}
return(generator.GenerateHash());
}
}
}
/// <summary>
/// Returns a unique hash for a combination of FileInfo objects.
/// </summary>
/// <param name="filesAndFolders">A collection of files.</param>
/// <param name="logger">A profiling logger.</param>
/// <returns>The hash.</returns>
/// <remarks>Each file is a tuple containing the FileInfo object and a boolean which indicates whether to hash the
/// file properties (false) or the file contents (true).</remarks>
private static string GetFileHash(IEnumerable <Tuple <FileSystemInfo, bool> > filesAndFolders, IProfilingLogger logger)
{
using (logger.DebugDuration <TypeLoader>("Determining hash of code files on disk", "Hash determined"))
{
// get the distinct file infos to hash
var uniqInfos = new HashSet <string>();
var uniqContent = new HashSet <string>();
using (var generator = new HashGenerator())
{
foreach (var fileOrFolder in filesAndFolders)
{
var info = fileOrFolder.Item1;
if (fileOrFolder.Item2)
{
// add each unique file's contents to the hash
// normalize the content for cr/lf and case-sensitivity
if (uniqContent.Add(info.FullName))
{
if (File.Exists(info.FullName) == false)
{
continue;
}
var content = RemoveCrLf(File.ReadAllText(info.FullName));
generator.AddCaseInsensitiveString(content);
}
}
else
{
// add each unique folder/file to the hash
if (uniqInfos.Add(info.FullName))
{
generator.AddFileSystemItem(info);
}
}
}
return(generator.GenerateHash());
}
}
}