private static GlobNode ParseNode(GlobParserContext context)
{
if (context.CurrentToken?.Kind == GlobTokenKind.Wildcard)
{
var next = context.Peek();
if (next != null && next.Kind == GlobTokenKind.Wildcard)
{
context.Accept(GlobTokenKind.Wildcard);
context.Accept(GlobTokenKind.Wildcard);
return(new RecursiveWildcardNode());
}
}
else if (context.CurrentToken?.Kind == GlobTokenKind.Parent)
{
context.Accept(GlobTokenKind.Parent);
return(new ParentDirectoryNode());
}
else if (context.CurrentToken?.Kind == GlobTokenKind.Current)
{
context.Accept(GlobTokenKind.Current);
return(new CurrentDirectoryNode());
}
var items = new List <PathSegment>();
while (true)
{
switch (context.CurrentToken?.Kind)
{
case GlobTokenKind.Text:
case GlobTokenKind.CharacterWildcard:
case GlobTokenKind.Wildcard:
case GlobTokenKind.BracketWildcard:
case GlobTokenKind.BraceExpansion:
items.Add(ParsePathSegment(context));
continue;
}
break;
}
return(new PathNode(items, context.Options));
}
private GlobNode ParseRoot(GlobParserContext context)
{
if (context.CurrentToken == null)
{
return(new RelativeRootNode());
}
if (_environment.Platform.IsUnix())
{
// Starts with a separator?
if (context.CurrentToken.Kind == GlobTokenKind.PathSeparator)
{
return(new UnixRootNode());
}
}
else
{
// Starts with a separator?
if (context.CurrentToken.Kind == GlobTokenKind.PathSeparator)
{
if (context.Peek()?.Kind == GlobTokenKind.PathSeparator)
{
context.Accept();
return(new UncRootNode(string.Empty));
}
// Get the drive from the working directory.
var workingDirectory = _environment.WorkingDirectory;
var root = workingDirectory.FullPath.Split(':').First();
return(new WindowsRootNode(root));
}
// Is this a drive?
if (context.CurrentToken.Kind == GlobTokenKind.Text &&
context.CurrentToken.Value.Length == 1 &&
context.Peek()?.Kind == GlobTokenKind.WindowsRoot)
{
var identifier = ParseText(context);
context.Accept(GlobTokenKind.WindowsRoot);
return(new WindowsRootNode(identifier.Value));
}
}
// Starts with an identifier?
if (context.CurrentToken.Kind == GlobTokenKind.Text)
{
// Is the identifier indicating a current directory?
if (context.CurrentToken.Value == ".")
{
context.Accept(GlobTokenKind.Text);
if (context.CurrentToken.Kind != GlobTokenKind.PathSeparator)
{
throw new InvalidOperationException();
}
context.Accept(GlobTokenKind.PathSeparator);
}
}
return(new RelativeRootNode());
}