// Include-exclude files enumerator for .net 3.5
public class IncludeExcludeFileEnumerator : IEnumerator<String>
{
private string excludeRegExPattern;
private readonly Regex
regexSeparateFilePath;
private readonly Regex excludeRegex = null;
private int currentPatternIndex;
private IEnumerator filesEnum;
private string[] files;
bool isNext = true;
private readonly List<TupleStringStringSearchOption> incPatternsList;
class TupleStringStringSearchOption
{
public
TupleStringStringSearchOption(string fullPathPattern, string pathPattern, SearchOption searchOption)
{
this.fullPathPattern = fullPathPattern;
this.pathPattern = pathPattern;
this.searchOption = searchOption;
}
public string fullPathPattern { get; set; }
public string pathPattern { get; set; }
public SearchOption searchOption { get; set; }
}
public
IncludeExcludeFileEnumerator(string baseDirectory, string includePattern, string excludePattern)
{
// Split comma separated string to array of
include patterns
var initIncludePatterns = includePattern.Split(',');
regexSeparateFilePath = new Regex(@"(.*)[\\/]([^\\/]*$)", RegexOptions.Compiled);
// Prepare include patterns
incPatternsList =
initIncludePatterns.ToList().ConvertAll(
(incPattern) =>
{
incPattern =
incPattern.Trim();
var matches =
regexSeparateFilePath.Matches(incPattern);
string pathPattern;
string filePattern;
if (matches.Count == 0)
{
pathPattern = "";
filePattern =
incPattern;
}
else
{
pathPattern =
matches[0].Groups[1].Value;
filePattern =
matches[0].Groups[2].Value;
}
SearchOption searchOption = SearchOption.TopDirectoryOnly;
if
(filePattern.Contains("**"))
{
filePattern =
filePattern.Replace("**", "*");
searchOption = SearchOption.AllDirectories;
}
var fullPathPattern = Path.Combine(baseDirectory,
pathPattern);
// Returns tuple
{PathPattern, FilePattern, SearchOption}
return new TupleStringStringSearchOption(fullPathPattern,
filePattern, searchOption);
});
// Prepare regular expression for exclude
case (all in one, concatinated by (| - or) separator)
if (!(String.IsNullOrEmpty(excludePattern)))
{
var excPatterns = excludePattern.Replace(".", @"\.");
excPatterns =
excPatterns.Replace("*", ".*");
excludeRegExPattern =
excPatterns.Replace(",", "|");
excludeRegex = new Regex(excludeRegExPattern, RegexOptions.Compiled);
}
Reset();
}
public string Current
{
get { return (string)filesEnum.Current; }
}
public void Dispose()
{
}
object System.Collections.IEnumerator.Current
{
get { return (Object)this.Current; }
}
public bool MoveNext()
{
do
{
if ((filesEnum == null) &&
(incPatternsList.Count < currentPatternIndex + 2))
{
return false;
}
if ((filesEnum == null) || (isNext == false))
{
TupleStringStringSearchOption tuple =
incPatternsList[++currentPatternIndex];
files = Directory.GetFileSystemEntries(tuple.fullPathPattern,
tuple.pathPattern);
filesEnum =
files.GetEnumerator();
isNext = true;
}
while (isNext)
{
isNext =
filesEnum.MoveNext();
if (isNext)
{
if (excludeRegex == null) return true;
if (!excludeRegex.Match((string)filesEnum.Current).Success)
return true;
// else continue;
}
else
{
filesEnum = null;
}
}
} while (true);
}
public void Reset()
{
currentPatternIndex = -1;
filesEnum = null;
}
}
public class IncludeExcludeFileEnumerable : IEnumerable<string>
{
private string baseDirectory;
private string includePattern;
private string excludePattern;
public
IncludeExcludeFileEnumerable(string baseDirectory, string includePattern, string excludePattern)
{
this.baseDirectory = baseDirectory;
this.includePattern = includePattern;
this.excludePattern = excludePattern;
}
public IEnumerator<string> GetEnumerator()
{
return new IncludeExcludeFileEnumerator(baseDirectory,
includePattern, excludePattern);
}
System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
{
return (IEnumerator)this.GetEnumerator();
}
}
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