streamline the options parser

Created by: nanwu

Streamline the options parser:

1. Reformat the usage as: lambdapp [options] source_file [target_file]
2. Remove the -o option, put argument for output file at the end of command.
3. reconsolidate the handling for illegal options.

Created by: Blub

While I can understand the desire to be POSIXLY_CORRECT (the && !file part in the option loop) I don't see why -o should be removed even as an optional way. And removing the option-delimiter -- is never a good idea. Proper scripts are supposed to always make it clear what are options, and what are file parameters which could come from some place else and possibly even start with -. Invocations of the form somecommand --my --opts -- $USER_ARGS are common and good practice, and should be supported.

Created by: nanwu

Absolutely. I was trying to simplicate the procedure however misunderstood the purpose of "--".

closed