Opened 10 years ago

Closed 10 years ago

#11842 closed (fixed) should display help output when no arguments are given

Reported by: Jeff Forcier Owned by: nobody
Component: Core (Management commands) Version: master
Severity: Keywords:
Cc: Triage Stage: Ready for checkin
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no


Ticket #378 mentions having honor Unix traditions -- and yet if you invoke it with no arguments, you get a profoundly unfriendly and non-Unix-like message:

Type ' help' for usage.

Compare to, say, apt-get:

$ apt-get
apt 0.7.9ubuntu17.2 for i386 compiled on Apr 17 2009 16:29:24
Usage: apt-get [options] command
       apt-get [options] install|remove pkg1 [pkg2 ...]
       apt-get [options] source pkg1 [pkg2 ...]


or git:

$ git
usage: git [--version] [--exec-path[=GIT_EXEC_PATH]] [-p|--paginate|--no-pager] [--bare] [--git-dir=GIT_DIR] [--work-tree=GIT_WORK_TREE] [--help] COMMAND [ARGS]


I'm sure I didn't need to give examples, but I felt like being thorough :)

The code related to this has not changed significantly since the 1.0.X branch -- i.e. the (tiny) patch applies cleanly to the latest 1.0.X branch checkout, as well as the latest SVN.

I'm not seeing any tests that apply to at all, so not including one -- please point me to the right spot if I've missed something.

Attachments (1)

my.patch (524 bytes) - added by Jeff Forcier 10 years ago.

Download all attachments as: .zip

Change History (7)

Changed 10 years ago by Jeff Forcier

Attachment: my.patch added

comment:1 Changed 10 years ago by Jeff Forcier

Summary: `` should display `--help` output when no arguments are should display help output when no arguments are given

comment:2 Changed 10 years ago by sebastian.hillig

Triage Stage: UnreviewedAccepted

comment:3 Changed 10 years ago by Chris Beaven

Patch needs improvement: set

It should still use sys.exit(1)

comment:4 Changed 10 years ago by Jeff Forcier

It actually does still exit with return code of 1, see end-of-line comments added to below snippet:

            subcommand = self.argv[1]
        except IndexError:
            subcommand = 'help' # Here's what my patch changes, sets subcommand to 'help'

        if subcommand == 'help': # So this is then true
            if len(args) > 2: # This is almost definitely false
                self.fetch_command(args[2]).print_help(self.prog_name, args[2])
            else: # So we branch to here
                sys.stderr.write(self.main_help_text() + '\n')
                sys.exit(1) # And exit 1

Let me know if I'm still missing something :) (I note that we could theoretically put in logic to skip the len(args) check in this situation, which would add a bit more state -- but not sure if that's worth it.)

comment:5 Changed 10 years ago by Chris Beaven

Patch needs improvement: unset
Triage Stage: AcceptedReady for checkin

That's fine. I was only triaging the content of the patch, not actually looking at code :)


comment:6 Changed 10 years ago by Adrian Holovaty

Resolution: fixed
Status: newclosed

(In [12198]) Fixed #11842 -- now displays usage information if invoked with no arguments. Thanks, bitprophet

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