R devel - Oct 2017 - Rscript Bug Report (improper parsing of [args])

Hi,

A user of my `optparse` package discovered a bug in Rscript's parsing of
[args]. (https://github.com/trevorld/optparse/issues/24)

I've reproduced the bug on my machine including compiling and checking the
development version of R.  I couldn't find a mention of it in the Bug
Tracker or New Features.

Can be minimally reproduced on the UNIX command line with following
commands:

    bash$ touch test.R
    bash$ Rscript test.R -g 5

    WARNING: unknown gui '5', using X11

This is a bug because according to the documentation in ?Rscript besides
`-e` the only [options] Rscript should attempt to parse should

1) Come before the file i.e. `Rscript -g X11 test.R` and not `Rscript
test.R -g X11`
2) Begin with two dashes and not one i.e. `--` and not `-' i.e. `Rscript
--gui=X11 test.R` and not `Rscript -g X11 test.R` (although I'm not sure if
the command-line Rscript even needs to be supporting the gui option).

Thanks,

Trevor

	[[alternative HTML version deleted]]

Thanks for the report, fixed in R-devel.
Tomas

On 10/20/2017 08:09 PM, Trevor Davis wrote:
> Hi,
>
> A user of my `optparse` package discovered a bug in Rscript's parsing
of
> [args]. (https://github.com/trevorld/optparse/issues/24)
>
> I've reproduced the bug on my machine including compiling and checking
the
> development version of R.  I couldn't find a mention of it in the Bug
> Tracker or New Features.
>
> Can be minimally reproduced on the UNIX command line with following
> commands:
>
>      bash$ touch test.R
>      bash$ Rscript test.R -g 5
>
>      WARNING: unknown gui '5', using X11
>
> This is a bug because according to the documentation in ?Rscript besides
> `-e` the only [options] Rscript should attempt to parse should
>
> 1) Come before the file i.e. `Rscript -g X11 test.R` and not `Rscript
> test.R -g X11`
> 2) Begin with two dashes and not one i.e. `--` and not `-' i.e.
`Rscript
> --gui=X11 test.R` and not `Rscript -g X11 test.R` (although I'm not
sure if
> the command-line Rscript even needs to be supporting the gui option).
>
> Thanks,
>
> Trevor
>
> 	[[alternative HTML version deleted]]
>
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