[Rd] Making R CMD nicer

[Barry Rowlingson]

If you write a lot of R code to run as command line scripts then look at
Dirk E's "littler":

$ r --help

Usage: r [options] [-|file]

Launch GNU R to execute the R commands supplied in the specified file, or
from stdin if '-' is used. Suitable for so-called shebang '#!/'-line
scripts.

Options:
  -h, --help           Give this help list
      --usage          Give a short usage message
  -V, --version        Show the version number
  -v, --vanilla        Pass the '--vanilla' option to R
  -t, --rtemp          Use per-session temporary directory as R does
  -i, --interactive    Let interactive() return 'true' rather than 'false'
  -q, --quick          Skip autoload / delayed assign of default libraries
  -p, --verbose        Print the value of expressions to the console
  -l, --packages list  Load the R packages from the comma-separated 'list'
  -d, --datastdin      Prepend command to load 'X' as csv from stdin
  -L, --libpath dir    Add directory to library path via '.libPaths(dir)'
  -e, --eval expr      Let R evaluate 'expr'

available from an archive near you...


On Mon, Jul 1, 2019 at 8:58 AM Jason Xu <jasonx98 using gmail.com> wrote:

> In my humble personal opinion, I try to avoid bash scripts longer than a
> couple lines because I find the syntax so obtuse and unintuitive it's
> difficult to maintain and write less buggy code. But that is mostly a
> reflection of my personal inexperience.
> I think the only time a bash script is really needed is for maximum
> portability in systems _with bash_.
> (I would use python for a wrapper in personal projects, given python comes
> pre-installed on many linux systems and OS X, but I completely understand
> not wanting to burden Windows users with an extra python dependency to
> install.)
>
>
>
>
>
> On Sun, Jun 30, 2019 at 8:08 PM Abby Spurdle <spurdle.a using gmail.com> wrote:
>
> > In that case, I was wrong.
> > And I must apologize...
> >
> > In saying that, good to see Windows out performing Linux on the command
> > line...
> >
> >
> > On Mon, Jul 1, 2019 at 11:30 AM Gábor Csárdi <csardi.gabor using gmail.com>
> > wrote:
> > >
> > > For the record, this is Linux R-devel:
> > >
> > > root using 4bef68c16864:~# R CMD
> > > /opt/R-devel/lib/R/bin/Rcmd: 60: shift: can't shift that many
> > > root using 4bef68c16864:~# R CMD -h
> > > /opt/R-devel/lib/R/bin/Rcmd: 62: exec: -h: not found
> > > root using 4bef68c16864:~# R CMD --help
> > > /opt/R-devel/lib/R/bin/Rcmd: 62: exec: --help: not found
> > >
> > > This is R-release on macOS:
> > >
> > > ❯ R CMD
> > > /Library/Frameworks/R.framework/Resources/bin/Rcmd: line 62:
> > > /Library/Frameworks/R.framework/Resources/bin/: is a directory
> > > /Library/Frameworks/R.framework/Resources/bin/Rcmd: line 62: exec:
> > > /Library/Frameworks/R.framework/Resources/bin/: cannot execute:
> > > Undefined error: 0
> > > ❯ R CMD -h
> > > /Library/Frameworks/R.framework/Resources/bin/Rcmd: line 62: exec: -h:
> > > invalid option
> > > exec: usage: exec [-cl] [-a name] file [redirection ...]
> > > ❯ R CMD --help
> > > /Library/Frameworks/R.framework/Resources/bin/Rcmd: line 62: exec: --:
> > > invalid option
> > > exec: usage: exec [-cl] [-a name] file [redirection ...]
> > >
> > > On Windows you indeed get a useful list of commands and more helpful
> > tips.
> > >
> > > Gabor
> > >
> > >
> > > On Sun, Jun 30, 2019 at 11:36 PM Abby Spurdle <spurdle.a using gmail.com>
> > wrote:
> > > >
> > > > > First time posting in the R mailing lists so hopefully this works
> > well.
> > > > > I noticed when I type `R CMD` I get this unhelpful message:
> > > > > /usr/lib/R/bin/Rcmd: 60: shift: can't shift that many
> > > >
> > > > I wasn't able to reproduce this.
> > > > Maybe it's a Linux thing.
> > > > But then, I suspect you've omitted some of your input.
> > > >
> > > > > I also think it would be nice if `R CMD help` showed the usable
> > commands.
> > > >
> > > > What do you mean...
> > > > All of the following give you the "usable commands":
> > > >
> > > > > R CMD
> > > > > R CMD -h
> > > > > R CMD --help
> > > >
> > > >         [[alternative HTML version deleted]]
> > > >
> > > > ______________________________________________
> > > > R-devel using r-project.org mailing list
> > > > https://stat.ethz.ch/mailman/listinfo/r-devel
> >
>
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>
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