[bug #51592] -[NSFileManager copyItemAtPath:toPath:error:] should not raise exceptions

URL:
  <http://savannah.gnu.org/bugs/?51592>

                 Summary: -[NSFileManager copyItemAtPath:toPath:error:] should
not raise exceptions
                 Project: GNUstep
            Submitted by: lcampbel
            Submitted on: Thu 27 Jul 2017 03:30:08 PM UTC
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

At the top of _copyFile:toFile:handler:, we have this:

  /* Assumes source is a file and exists! */
  NSAssert1 ([self fileExistsAtPath: source],
    @"source file '%@' does not exist!", source);

  attributes = [self fileAttributesAtPath: source traverseLink: NO];
  NSAssert1 (attributes, @"could not get the attributes for file '%@'",
    source);

However, any other error causes the handler (if any) to be called and NO to be
returned. I think these asserts should be replaced by something like:

if (!exists)
      return [self _proceedAccordingToHandler: handler
                                     forError: @"source file does not exist"
                                       inPath: source
                                     fromPath: source
                                       toPath: destination];





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