/// <summary>
/// Searches file in load directories and then appends extensions.
/// </summary>
private ResolvedFile FindFile(string /*!*/ path, bool appendExtensions, string[] sourceFileExtensions)
{
Assert.NotNull(path);
bool isAbsolutePath;
#if SILVERLIGHT
{
#else
if (path.StartsWith("~/", StringComparison.Ordinal) || path.StartsWith("~\\", StringComparison.Ordinal))
{
path = RubyUtils.ExpandPath(_context.Platform, path);
isAbsolutePath = true;
}
else
{
#endif
try {
isAbsolutePath = Platform.IsAbsolutePath(path);
} catch (ArgumentException e) {
throw RubyExceptions.CreateLoadError(e);
}
}
string extension = RubyUtils.GetExtension(path);
// Absolute path -> load paths not consulted.
if (isAbsolutePath)
{
return(ResolveFile(path, extension, appendExtensions, sourceFileExtensions));
}
string[] loadPaths = GetLoadPathStrings();
if (loadPaths.Length == 0)
{
return(null);
}
// If load paths are non-empty and the path starts with .\ or ..\ then MRI also ignores the load paths.
if (path.StartsWith("./", StringComparison.Ordinal) ||
path.StartsWith("../", StringComparison.Ordinal) ||
path.StartsWith(".\\", StringComparison.Ordinal) ||
path.StartsWith("..\\", StringComparison.Ordinal))
{
return(ResolveFile(path, extension, appendExtensions, sourceFileExtensions));
}
foreach (var dir in loadPaths)
{
ResolvedFile result = ResolveFile(RubyUtils.CombinePaths(dir, path), extension, appendExtensions, sourceFileExtensions);
if (result != null)
{
return(result);
}
}
return(null);
}
/// <summary>
/// Appends extensions if applicable.
/// </summary>
private ResolvedFile ResolveFile(string /*!*/ path, string /*!*/ extension, bool appendExtensions, string[] /*!*/ knownExtensions)
{
Debug.Assert(RubyUtils.GetExtension(path) == extension);
string expandedPath = RubyUtils.ExpandPath(_context.Platform, path);
// MRI doesn't load file w/o .rb extension:
if (IsKnownExtension(extension, knownExtensions))
{
return(GetSourceUnit(path, expandedPath, extension, false));
}
if (_LibraryExtensions.IndexOf(extension, DlrConfiguration.FileExtensionComparer) != -1)
{
if (Platform.FileExists(expandedPath))
{
return(new ResolvedFile(expandedPath, null));
}
}
else if (!appendExtensions)
{
return(GetSourceUnit(path, expandedPath, extension, false));
}
if (appendExtensions)
{
List <string> matchingExtensions = GetExtensionsOfExistingFiles(expandedPath, knownExtensions);
if (matchingExtensions.Count == 1)
{
return(GetSourceUnit(path + matchingExtensions[0], expandedPath + matchingExtensions[0], matchingExtensions[0], true));
}
else if (matchingExtensions.Count > 1)
{
Exception e = new AmbiguousFileNameException(expandedPath + matchingExtensions[0], expandedPath + matchingExtensions[1]);
throw RubyExceptions.CreateLoadError(e);
}
foreach (string libExtension in _LibraryExtensions)
{
if (Platform.FileExists(expandedPath + libExtension))
{
return(new ResolvedFile(expandedPath + libExtension, libExtension));
}
}
}
return(null);
}
private bool LoadFromPath(Scope globalScope, object self, string /*!*/ path, RubyEncoding /*!*/ pathEncoding, LoadFlags flags, out object loaded)
{
Assert.NotNull(pathEncoding, path);
string[] sourceFileExtensions;
if ((flags & LoadFlags.AnyLanguage) != 0)
{
sourceFileExtensions = DomainManager.Configuration.GetFileExtensions();
}
else
{
sourceFileExtensions = DomainManager.Configuration.GetFileExtensions(_context);
}
ResolvedFile file = FindFile(path, (flags & LoadFlags.AppendExtensions) != 0, sourceFileExtensions);
// MRI 1.9: normalize the path
string normalizedPath;
if (_context.RubyOptions.Compatibility == RubyCompatibility.Ruby19)
{
normalizedPath = RubyUtils.ExpandPath(_context.Platform, path);
}
else
{
normalizedPath = path;
}
if (file == null)
{
// MRI: doesn't throw an exception if the path is in $" (performs resolution first though):
if (AlreadyLoaded(path, normalizedPath, flags, sourceFileExtensions))
{
loaded = null;
return(false);
}
throw RubyExceptions.CreateLoadError(String.Format("no such file to load -- {0}", path));
}
string pathWithExtension = path;
if (file.AppendedExtension != null)
{
normalizedPath += file.AppendedExtension;
pathWithExtension += file.AppendedExtension;
}
if (AlreadyLoaded(pathWithExtension, normalizedPath, flags) || _unfinishedFiles.Contains(normalizedPath))
{
if ((flags & LoadFlags.ResolveLoaded) != 0)
{
if (_context.RubyOptions.Compatibility < RubyCompatibility.Ruby19)
{
normalizedPath = RubyUtils.ExpandPath(_context.Platform, path);
}
if (file.SourceUnit != null)
{
Scope loadedScope;
if (!LoadedScripts.TryGetValue(normalizedPath, out loadedScope))
{
throw RubyExceptions.CreateLoadError(String.Format("no such file to load -- {0}", file.Path));
}
loaded = loadedScope;
}
else
{
loaded = Platform.LoadAssemblyFromPath(normalizedPath);
}
}
else
{
loaded = null;
}
return(false);
}
try {
// save path as is, no canonicalization nor combination with an extension or directory:
_unfinishedFiles.Push(normalizedPath);
if (file.SourceUnit != null)
{
AddScriptLines(file.SourceUnit);
ScriptCode compiledCode;
if (file.SourceUnit.LanguageContext == _context)
{
compiledCode = CompileRubySource(file.SourceUnit, flags);
}
else
{
compiledCode = file.SourceUnit.Compile();
}
loaded = Execute(globalScope, compiledCode);
}
else
{
Debug.Assert(file.Path != null);
try {
Assembly assembly = Platform.LoadAssemblyFromPath(Platform.GetFullPath(file.Path));
DomainManager.LoadAssembly(assembly);
loaded = assembly;
} catch (Exception e) {
throw RubyExceptions.CreateLoadError(e);
}
}
FileLoaded(MutableString.Create(normalizedPath, pathEncoding), flags);
} finally {
_unfinishedFiles.Pop();
}
return(true);
}