fix: display help info when no args provided

[huajijam]

before: after:

[ataradov]

I don't like then programs do this and this is not how command line tools usually behave.

Brief message telling you what to do is enough.

[huajijam]

I don't like then programs do this and this is not how command line tools usually behave.

Brief message telling you what to do is enough.

but, L144 will not trigger when no args provided,maybe ur os_check is broken?

I check with no args and a args begin with no “-” argc and last both are 1,but it just not happen

[huajijam]

[ataradov]

Yeah, that's a mistake. I'll fix that along with adding better debug info.