From g@bembecker @end|ng |rom gm@||@com  Tue Jun 11 18:49:17 2019
From: g@bembecker @end|ng |rom gm@||@com (Gabriel Becker)
Date: Tue, 11 Jun 2019 09:49:17 -0700
Subject: [Rd] [R] Open a file which name contains a tilde
In-Reply-To: <20190611100938.GA3588@debian64>
References: <20190605160714.GA24635@debian64>
 <20190606135957.0be4db10@trisector>
 <CABcYAdLgLrBwNW4A4EgYx0RwD9zjCo4Mpe7S05SeohoNmMQSGg@mail.gmail.com>
 <20190610165155.GA29855@debian64>
 <CABtg=Km4i9dsPoqC0sK=G9LvxbMd4FcHJ436usHkd+i7FPrR5Q@mail.gmail.com>
 <20190611100938.GA3588@debian64>
Message-ID: <CAD4oTHEqKpgxrV406fzqO2CYz2y7ccAsFBaU3TFt5ShVop1uXQ@mail.gmail.com>

Hi Frank,

I'm hesitant to be "that guy", but in case no one else has brought this up
to you, having files with a tilde in their names (generally but especially
on a linux system, where ~ in file names has a very important special
meaning in some cases, as we know) strikes me as an exceptionally bad
practice anyway. In light of that, the solution with the smallest amount of
pain for you is almost surely to just... not do that. Your filenames will
be better for it anyway.

There is a reason no one has complained about this before, and while I
haven't run a study or anything, I strongly suspect its that "everyone"
else is already on the "no tildes in filenames" bandwagon, so this
behavior, even if technically a bug, has no ability to cause them problems.

Best,
~G

On Tue, Jun 11, 2019 at 8:25 AM Frank Schwidom <schwidom at gmx.net> wrote:

> Hi,
>
> yes, I have seen this package and it has the same tilde expanding problem.
>
> Please excuse me I will cc this answer to r-help and r-devel to keep the
> discussion running.
>
> Kind regards,
> Frank Schwidom
>
> On 2019-06-11 09:12:36, G?bor Cs?rdi wrote:
> > Just in case, have you seen the fs package?
> > https://fs.r-lib.org/
> >
> > Gabor
> >
> > On Tue, Jun 11, 2019 at 7:51 AM Frank Schwidom <schwidom at gmx.net> wrote:
> > >
> > > Hi,
> > >
> > > to get rid of any possible filename modification I started a little
> project to cover my usecase:
> > >
> > > https://github.com/schwidom/simplefs
> > >
> > > This is my first R package, suggestions and a review are welcome.
> > >
> > > Thanks in advance
> > > Frank Schwidom
> > >
> > > On 2019-06-07 09:04:06, Richard O'Keefe wrote:
> > > >    How can expanding tildes anywhere but the beginning of a file
> name NOT be
> > > >    considered a bug?
> > > >    On Thu, 6 Jun 2019 at 23:04, Ivan Krylov <[1]
> krylov.r00t at gmail.com> wrote:
> > > >
> > > >      On Wed, 5 Jun 2019 18:07:15 +0200
> > > >      Frank Schwidom <[2]schwidom at gmx.net> wrote:
> > > >
> > > >      > +> path.expand("a ~ b")
> > > >      > [1] "a /home/user b"
> > > >
> > > >      > How can I switch off any file crippling activity?
> > > >
> > > >      It doesn't seem to be possible if readline is enabled and works
> > > >      correctly.
> > > >
> > > >      Calls to path.expand [1] end up [2] in R_ExpandFileName [3],
> which
> > > >      calls R_ExpandFileName_readline [4], which uses libreadline
> function
> > > >      tilde_expand [5]. tilde_expand seems to be designed to expand
> '~'
> > > >      anywhere in the string it is handed, i.e. operate on whole
> command
> > > >      lines, not file paths.
> > > >
> > > >      I am taking the liberty of Cc-ing R-devel in case this can be
> > > >      considered a bug.
> > > >
> > > >      --
> > > >      Best regards,
> > > >      Ivan
> > > >
> > > >      [1]
> > > >      [3]
> https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/main/names.c#L807
> > > >
> > > >      [2]
> > > >      [4]
> https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/main/platform.c#L1915
> > > >
> > > >      [3]
> > > >      [5]
> https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/unix/sys-unix.c#L147
> > > >
> > > >      [4]
> > > >      [6]
> https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/unix/sys-std.c#L494
> > > >
> > > >      [5]
> > > >      [7]
> https://git.savannah.gnu.org/cgit/readline.git/tree/tilde.c?h=devel#n187
> > > >
> > > >      ______________________________________________
> > > >      [8]R-help at r-project.org mailing list -- To UNSUBSCRIBE and
> more, see
> > > >      [9]https://stat.ethz.ch/mailman/listinfo/r-help
> > > >      PLEASE do read the posting guide
> > > >      [10]http://www.R-project.org/posting-guide.html
> > > >      and provide commented, minimal, self-contained, reproducible
> code.
> > > >
> > > > References
> > > >
> > > >    Visible links
> > > >    1. mailto:krylov.r00t at gmail.com
> > > >    2. mailto:schwidom at gmx.net
> > > >    3.
> https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/main/names.c#L807
> > > >    4.
> https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/main/platform.c#L1915
> > > >    5.
> https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/unix/sys-unix.c#L147
> > > >    6.
> https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/unix/sys-std.c#L494
> > > >    7.
> https://git.savannah.gnu.org/cgit/readline.git/tree/tilde.c?h=devel#n187
> > > >    8. mailto:R-help at r-project.org
> > > >    9. https://stat.ethz.ch/mailman/listinfo/r-help
> > > >   10. http://www.r-project.org/posting-guide.html
> > >
> > > ______________________________________________
> > > R-devel at r-project.org mailing list
> > > https://stat.ethz.ch/mailman/listinfo/r-devel
> >
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>

	[[alternative HTML version deleted]]



[Rd] [R] Open a file which name contains a tilde
Gabriel Becker