CLI dies if output pipe is broken.

[binderjoe]

If cli output is attached to a broken pipe, it will crash. Example: 'az vm list | jfhksfh'
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/runpy.py", line 170, in _run_module_as_main
"main", mod_spec)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/Users/joe/azure-cli/src/azure/cli/main.py", line 5, in
sys.exit(azure.cli.main.main(sys.argv[1:]))
File "/Users/joe/azure-cli/src/azure/cli/main.py", line 47, in main
OutputProducer(formatter=formatter, file=file).out(cmd_result.result)
File "/Users/joe/azure-cli/src/azure/cli/_output.py", line 62, in out
print(self.formatter(obj), file=self.file)
BrokenPipeError: [Errno 32] Broken pipe

[derekbekoe]

Looking into this.

[mayurid]

@derekbekoe : Close the issue?

[derekbekoe]

This isn't resolved right now.
I looked at this but my associated PR (#61) is to be revisited as a different way of solving this was suggested.

[JasonRShaver]

Example from recent build:

jasonsha@JasonShaMBP: ~ $ az vm list | asdfasdf
-bash: asdfasdf: command not found
[Errno 32] Broken pipe
Traceback (most recent call last):
  File "/usr/local/az/envs/default/lib/python2.7/site-packages/azure/cli/main.py", line 55, in main
    OutputProducer(formatter=formatter, file=file).out(cmd_result)
  File "/usr/local/az/envs/default/lib/python2.7/site-packages/azure/cli/_output.py", line 74, in out
    print(output, file=self.file, end='')
IOError: [Errno 32] Broken pipe

[mayurid]

Closing as #770 is tracking this