Print only vertical grid line

[Aaron-Rumpler]

At the moment, the only way to get the vertical grid line that separates the line numbers and the actual content seems to be with --style=gird, but this also prints the horizontal grid lines at the top and bottom of the page, like this:

─────┬──────────────────────────────────────────────────────────────────────────
   1 │ This is a test file with a few lines.
   2 │ Here is a line.
   3 │ Here is another line.
   4 │ And this is the last line.
─────┴──────────────────────────────────────────────────────────────────────────

It would be good to be able to print only the vertical line without the horizontal lines, like this:

   1 │ This is a test file with a few lines.
   2 │ Here is a line.
   3 │ Here is another line.
   4 │ And this is the last line.

And ideally, that should also work with --style=rule, to produce something like this when two files are passed in:

   1 │ This is a test file with a few lines.
   2 │ Here is a line.
   3 │ Here is another line.
   4 │ And this is the last line.
─────┼──────────────────────────────────────────────────────────────────────────
   1 │ This is another test file. It has lines in it.
   2 │ This is the second line. The line above was the first.
   3 │ And this is the third and final line.

[sharkdp]

Thank you for your feature request. May I ask what your use case is?

[Aaron-Rumpler]

Keeping the line numbers of the input matched to the line numbers of the output while still keeping the vertical separator between the line number and the line itself.

[t-mangoe]

I was just wondering, so let me ask you a simple question. Is it not enough to use nl command? For example, the command bat <filename> | nl -s " | " will print only vertical lines. (Or, does nl command not satisfy your requirements?)

[joshtriplett]

I would like something similar to this as well: I'd like a line between the line numbers and file content, and I'd like the line between the header and the file content, and lines between files, but I don't want a line before the first file or after the last file. That would allow more content to fit on one screen, while still keeping things separated.

[andrevmatos]

+1 This would be great for fzf preview windows with filename in preview label.