escape io.fileseparator in Windows

escape io.fileseparator in Windows

[Pablo Rodriguez via ntg-context]

Dear list,

I have the following sample:

  \starttext
  \startluacode
  main_file = document.files[1]

  if file.pathpart(main_file) == "" then
    main_filename = file.nameonly(main_file)
    main_filename_win = main_filename
  else
    main_filename = file.pathpart(main_file):gsub(io.fileseparator, "/")
       .. "/" .. file.nameonly(main_file)
    docx_file = main_filename .. "-file.docx"
    epub_file = main_filename .. "-file.epub"
    if os.name == "windows" then
      main_filename_win = file.pathpart(main_file) .. io.fileseparator
        .. file.nameonly(main_file)
      docx_file_win = main_filename_win .. "-file.docx"
      epub_file_win = main_filename_win .. "-file.epub"
    end
  end

  if os.name=="windows" then
    context(docx_file_win)
    os.execute("copy " .. docx_file_win .. " aeae")
  else
    context(docx_file)
  end
  \stopluacode
  \stoptext

If I run it on Windows, context(docx_file_win) cannot deal with the
backslash, so I get:

  .document-file.docx

So it is impossible that os.execute may work with copy.

Running it with Linux, I get "./document-file.docx".

How can I get the io.fileseparator or escape the backslash in
main_filename_win above?

Many thanks for your help,

Pablo
--
http://www.ousia.tk
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Re: escape io.fileseparator in Windows

[Hans Hagen via ntg-context]

On 11/3/2021 7:49 PM, Pablo Rodriguez via ntg-context wrote:
> Dear list,
> 
> I have the following sample:
> 
>    \starttext
>    \startluacode
>    main_file = document.files[1]
> 
>    if file.pathpart(main_file) == "" then
>      main_filename = file.nameonly(main_file)
>      main_filename_win = main_filename
>    else
>      main_filename = file.pathpart(main_file):gsub(io.fileseparator, "/")
>         .. "/" .. file.nameonly(main_file)
>      docx_file = main_filename .. "-file.docx"
>      epub_file = main_filename .. "-file.epub"
>      if os.name == "windows" then
>        main_filename_win = file.pathpart(main_file) .. io.fileseparator
>          .. file.nameonly(main_file)
>        docx_file_win = main_filename_win .. "-file.docx"
>        epub_file_win = main_filename_win .. "-file.epub"
>      end
>    end
> 
>    if os.name=="windows" then
>      context(docx_file_win)
>      os.execute("copy " .. docx_file_win .. " aeae")
>    else
>      context(docx_file)
>    end
>    \stopluacode
>    \stoptext
> 
> If I run it on Windows, context(docx_file_win) cannot deal with the
> backslash, so I get:
> 
>    .document-file.docx
> 
> So it is impossible that os.execute may work with copy.
> 
> Running it with Linux, I get "./document-file.docx".
> 
> How can I get the io.fileseparator or escape the backslash in
> main_filename_win above?
(there are helpers for splitting names and combining paths)

- use locals
- wrap names in "" and use / : dir "c:/data"
- just use file.copy (with forward slashes), is faster too

so in the end there is no need to test for windows

Hans


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Re: escape io.fileseparator in Windows

[Pablo Rodriguez via ntg-context]

On 11/3/21 9:55 PM, Hans Hagen via ntg-context wrote:
> On 11/3/2021 7:49 PM, Pablo Rodriguez via ntg-context wrote:
>> [...]
>> How can I get the io.fileseparator or escape the backslash in
>> main_filename_win above?
> (there are helpers for splitting names and combining paths)
>
> - use locals
> - wrap names in "" and use / : dir "c:/data"

Many thanks for your reply, Hans.

I didn’t know that this was valid in Windows command prompt:

  command "d:/data/file.txt"

> - just use file.copy (with forward slashes), is faster too

copy was just a command sample, not the one I intend to use.

> so in the end there is no need to test for windows

I’m really suprised that Windows accepts slashes in paths.

Many thanks for your help again,

Pablo
--
http://www.ousia.tk
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Re: escape io.fileseparator in Windows

[Henning Hraban Ramm via ntg-context]

> Am 04.11.2021 um 15:54 schrieb Pablo Rodriguez via ntg-context <ntg-context@ntg.nl>:
> 
> I’m really suprised that Windows accepts slashes in paths.

It does at least since Windows NT.

Hraban
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