Here's a patch implementing function assembly::is-assembly(assemblyFilename).
I didn't not test it very extensively, so feedback welcome. Especially
I noticed (if I'm not wrong) undocumented behavior, as
AssemblyName.GetAssemblyName seems to throw a FileLoadException
sometimes, where msdn doesn't state this can happen.
cheers
Thibaut Barr�re
Index: src/NAnt.Core/Functions/AssemblyFunctions.cs
===================================================================
RCS file: /cvsroot/nant/nant/src/NAnt.Core/Functions/AssemblyFunctions.cs,v
retrieving revision 1.7
diff -u -r1.7 AssemblyFunctions.cs
--- src/NAnt.Core/Functions/AssemblyFunctions.cs 2 Oct 2004 08:50:25
-0000 1.7
+++ src/NAnt.Core/Functions/AssemblyFunctions.cs 22 Nov 2004 21:59:25
-0000
@@ -23,6 +23,7 @@
using System.Collections;
using System.Reflection;
using System.Globalization;
+using System.Security;
using NAnt.Core;
using NAnt.Core.Types;
@@ -93,7 +94,47 @@
public static Assembly LoadFromFile(string assemblyFile) {
return Assembly.LoadFrom(assemblyFile);
}
-
- #endregion Public Static Methods
- }
+
+ /// <summary>
+ /// Check if a given file is an assembly.
+ /// </summary>
+ /// <param name="assemblyFile">The name or path of the file to
be checked.</param>
+ /// <returns>True if the file is a valid assembly, false if
it's not or if the assembly seems corrupted (invalid headers or
metadata).</returns>
+ /// <exception cref="ArgumentNullException"><paramref
name="assemblyFile" /> is a null <see cref="string"/>.</exception>
+ /// <exception cref="ArgumentException"><paramref
name="assemblyFile" /> is an empty <see cref="string"/>.</exception>
+ /// <exception cref="FileNotFoundException"><paramref
name="assemblyFile" /> is not found, or the file you are trying to check does
not specify a filename extension.</exception>
+ /// <exception cref="SecurityException">The caller does not
have path discovery permission.</exception>
+ /// <exception cref="FileLoadException">The file could not be
loaded for some reason.</exception>
+ [Function("is-assembly")]
+ public static bool IsAssembly(string assemblyFile)
+ {
+ try
+ {
+ AssemblyName.GetAssemblyName(assemblyFile);
+ // no exception occurred, this is an assembly
+ return true;
+ }
+ catch (FileLoadException fle)
+ {
+ if ( (fle.InnerException!=null) &&
(fle.InnerException.GetType()==typeof(BadImageFormatException)) )
+ {
+ // this is probably not an assembly, or
it has invalid headers / metadata
+ return false;
+ }
+ // other exceptions should be thrown to the
end-user
+ throw;
+ }
+ catch (BadImageFormatException)
+ {
+ return false;
+ }
+ catch (Exception)
+ {
+ // other exceptions should be thrown to the
end-user
+ throw;
+ }
+ }
+
+ #endregion Public Static Methods
+ }
}
