From tr@ver@c @end|ng |rom gm@||@com  Tue Jun 11 20:26:40 2019
From: tr@ver@c @end|ng |rom gm@||@com (Travers Ching)
Date: Tue, 11 Jun 2019 11:26:40 -0700
Subject: [Rd] [R] Open a file which name contains a tilde
In-Reply-To: <CAD4oTHEqKpgxrV406fzqO2CYz2y7ccAsFBaU3TFt5ShVop1uXQ@mail.gmail.com>
References: <20190605160714.GA24635@debian64>
 <20190606135957.0be4db10@trisector>
 <CABcYAdLgLrBwNW4A4EgYx0RwD9zjCo4Mpe7S05SeohoNmMQSGg@mail.gmail.com>
 <20190610165155.GA29855@debian64>
 <CABtg=Km4i9dsPoqC0sK=G9LvxbMd4FcHJ436usHkd+i7FPrR5Q@mail.gmail.com>
 <20190611100938.GA3588@debian64>
 <CAD4oTHEqKpgxrV406fzqO2CYz2y7ccAsFBaU3TFt5ShVop1uXQ@mail.gmail.com>
Message-ID: <CAPLMX9FrM2ZjuzjR6FEibZt0_KkujhwknQPXoWjfVfgFZNFYFQ@mail.gmail.com>

Hi Gabriel,

It may be bad practice, but you don't always have control over the file
name.

E.g. if someone shares a file with a tilde in it -- yes it is simple to
rename but it is extra time, and you might not bother to rename a file
without foreknowledge of this bug in the first place.

Even worse, if someone points you to a read only location on a shared
server, you won't even be able to rename the file, and copying might be
prohibitive if it's a large file.

There are also tilde files created automatically by other programs, notably
microsoft office.

Travers




On Tue, Jun 11, 2019 at 9:49 AM Gabriel Becker <gabembecker at gmail.com>
wrote:

> 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]]
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>

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[Rd] [R] Open a file which name contains a tilde
Travers Ching