Egad fails ungracefully if the output directory already exists

[Francis Bond]

If you have already created the output directory (maybe as a result of an interrupted run) then Egad crashes.

A warning and offer to change the directory name would be more friendly.

~$ python bzr/egad/Egad.py treebank/egad/jacy/090705/egad.xml
Traceback (most recent call last):
  File "bzr/egad/Egad.py", line 73, in <module>
    main()
  File "bzr/egad/Egad.py", line 70, in main
    instance = EgadCLI(job)
  File "bzr/egad/Egad.py", line 10, in __init__
    self.process_job(job)
  File "/home/bond/bzr/egad/egad/core.py", line 28, in process_job
    os.makedirs(output_dir)
  File "/usr/lib/python2.6/os.py", line 157, in makedirs
    mkdir(name, mode)
OSError: [Errno 17] File exists: '/home/bond/treebank/egad/jacy/090705/egad

[Michael Wayne Goodman (goodmami)]

Fixed in r12.

Egad now prompts if you want to overwrite the directory. If yes, the existing directory will be deleted and a new one will be created. Be careful not to overwrite directories you don't want to lose.

Alternatively, you can run Egad with the -F or --overwrite flags, thus avoiding the prompt, and forcing Egad to overwrite if necessary.

[Michael Wayne Goodman (goodmami)]

oops. r12 actually broke something (I moved a variable declaration and import into a function, and they fell out of scope in the main function). This is fixed in r13.