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Open a file which name contains a tilde

Wed, Jun 12, 2019 5:15 AM

@ Gabriel:

"Avoid tilde in file names":
Not quite.
A tilde *suffix* is commonly used by *nix editors for backup files
https://unix.stackexchange.com/questions/76189/what-does-the-tilde-mean-at-the-end-of-a-filename

On Wed, Jun 12, 2019 at 2:43 AM Kurt Hornik <Kurt.Hornik at wu.ac.at> wrote:

Duncan Murdoch writes:

With c76695 in the trunk, we now only tilde expand file names starting
with a tilde also when using readline.

Best
-k

On 11/06/2019 4:34 p.m., William Dunlap via R-devel wrote:

Note that R treats tildes in file names differently on Windows and

Linux.

On Windows, it is only replaced if it it at the beginning of the line

and

is followed by a forward or backward slash or end-of-line.  On Linux it

is

replaced no matter where it is in the text and ~someUser will be

replaced

by someUser's home directory (if 'someUser' is a user with a home
directory).

That's not quite true:  On Linux the bug is in the code that uses
libreadline, which you don't have to use.  If you just specify
"--no-readline" when you start R, it will be fine on Linux, as far as I
can see.

I wouldn't choose that as the default way to run R (it's pretty
irritating not to have readline support), but it is a workaround for
this bug.

Duncan Murdoch

Hence, if you have a Windows machine that can look at the file system on
your Linux machine you can use file.rename on Windows to change the

names.

My inclination would be to use a bash script on Linux to change the

names,

but if you are not comfortable with bash try the Windows approach.

Bill Dunlap
TIBCO Software
wdunlap tibco.com


On Tue, Jun 11, 2019 at 1:13 PM Frank Schwidom <schwidom at gmx.net>

wrote:

Hi Gabriel,

I actually want to make renames over thousands of files. But if I am

not

able to express the source filename of the rename operation I will not

be

able to get the work done. Besides the fact that there are issues I

think

that R is qualified for solving my problem by the method how it can

handle

long vectors of strings, booleans and also lists.

Kind regards,
Frank

On 2019-06-11 09:49:17, Gabriel Becker 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 <[1]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?
[2]https://fs.r-lib.org/

Gabor

On Tue, Jun 11, 2019 at 7:51 AM Frank Schwidom <[3]

schwidom at gmx.net>

wrote:

Hi,

to get rid of any possible filename modification I started a

little

project to cover my usecase:

[4]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][5]krylov.r00t at gmail.com> wrote:

     On Wed, 5 Jun 2019 18:07:15 +0200
     Frank Schwidom <[2][6]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][7]

https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/main/names.c#L807

[2]

[4][8]

https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/main/platform.c#L1915

[3]

[5][9]

https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/unix/sys-unix.c#L147

[4]

[6][10]

https://github.com/wch/r-source/blob/12d1d2d232d84aa355e333348b81180a0e2c6f2f/src/unix/sys-std.c#L494

[5]

[7][11]

https://git.savannah.gnu.org/cgit/readline.git/tree/tilde.c?h=devel#n187

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References

Visible links
1. mailto:schwidom at gmx.net
2. https://fs.r-lib.org/
3. mailto:schwidom at gmx.net
4. https://github.com/schwidom/simplefs
5. mailto:krylov.r00t at gmail.com
6. mailto:schwidom at gmx.net
7.

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Thread (11 messages)

Frank Schwidom Open a file which name contains a tilde Jun 11 Gabriel Becker Open a file which name contains a tilde Jun 11 Travers Ching Open a file which name contains a tilde Jun 11 Frank Schwidom Open a file which name contains a tilde Jun 11 William Dunlap Open a file which name contains a tilde Jun 11 Duncan Murdoch Open a file which name contains a tilde Jun 11 Kurt Hornik Open a file which name contains a tilde Jun 12 Paul McQuesten Open a file which name contains a tilde Jun 12 Gabriel Becker Open a file which name contains a tilde Jun 12 Gabriel Becker Open a file which name contains a tilde Jun 13 Paul McQuesten Open a file which name contains a tilde Jun 13