'json' command doesn't work with NSData objects

[snej]

I love the 'json' command, but most of the time I've got JSON stored in NSData objects, not NSStrings, and it barfs on those:

Traceback (most recent call last):
  File "/Users/snej/.lldb/MCSLLDBToolkit/mcslldb_helpers.py", line 61, in wrapper
    result = function(debugger, *args)
  File "/Users/snej/.lldb/MCSLLDBToolkit/mcslldb_commands.py", line 22, in json
    pretty_json_string = json_lib.dumps(json_lib.loads(json_string),
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/__init__.py", line 338, in loads
    return _default_decoder.decode(s)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 365, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/decoder.py", line 383, in raw_decode
    raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded

[narfdotpl]

Thanks, @snej.

Supporting NSData seems reasonable, but there are two problems with it:

1. You have to choose encoding (although I'm sure UTF8 is a pretty obvious default).
2. LLDB doesn't have access to NSUTF8StringEncoding enum.

I added NSData support in de48a31 commit on 1-json-nsdata branch. I'm not sure whether to merge it into master just yet, but you can check this change out. Quit Xcode and run:

cd ~/.lldb/MCSLLDBToolkit
git pull
git checkout 1-json-nsdata