Global options

[suntong]

Hi 仕晋,

I'll enhance my code-gen further before I write the wiki. Meanwhile, another question,

Does CLI support global options? By "global options" I mean the options supplied before the sub commands. E.g., both apt-get and git have options before the sub commands:

$ apt-get 
apt 1.2.10 (amd64)
Usage: apt-get [options] command
       apt-get [options] install|remove pkg1 [pkg2 ...]
       apt-get [options] source pkg1 [pkg2 ...]
...

$ git 
usage: git [--version] [--help] [-C <path>] [-c name=value]
           [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
           [-p | --paginate | --no-pager] [--no-replace-objects] [--bare]
           [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
           <command> [<args>]
...

Any example that shows a sub command has global options and its own "private" options playing together?

On a very closely related question, when talking about global options, the most common request is for the application configuration, using something like -C config to override the defaults. Just like your 017-jsonfile example. My question is,

Would CLI allow the application to,

• define those application configuration defaults in the program
• and allow predefined configuration file to override those defaults. Most importantly, the user configuration file can be only a subset of the configurations. For all those not in the user configuration file, take the defaults from definition in the program
• and allow user to use environment var to specify a different configuration file to use
• and allow user to command line (e.g., -C config) to specify a different configuration file to use (just like your 017-jsonfile example)

Would CLI allow the above layered approach? How much it can do at present?

Thanks

[mkideal]

Global options is unsupported at present. I'm trying to think. I will consider every one of your suggestions. I really appreciate you.

[mkideal]

Global options is supported now. see exmaple 027-global-option and commit b9abefb

[suntong]

thanks. will try tomorrow.

[suntong]

PERFECT!!

Even better that I anticipated.

Well done. Thanks a bunch!