Re: Location list entries for unsaved buffer open a new buffer

Hi,

On Sat, Oct 21, 2023 at 7:09 AM Lifepillar <lifepillar@lifepillar.me> wrote:

I have a function that pipes a buffer into an external program, then
parses its output in a callback and adds the parsed results to
a location list. Simplified code for the callback:

    def Callback(channel: job, msg: string, winid: number, efm: string, cwd: string)
      silent execute "lcd" cwd
      var what = getqflist({"lines": [msg], "efm": efm})
      silent lcd -
      setloclist(winid, what.items, "a")
    enddef

The lines to be parsed have a pretty standard format:

    filename:line:col message

The program reads from stdin, hence `filename` is passed as an argument
to the program. The program simply puts whatever filename it gets into
its output messages.

This works fine for buffers backed up by a file: I pass the buffer's
name as the filename argument. My problem is that I don't know how to
create an entry in the location list for an unsaved buffer. Passing
something like '[No Name]', 'unnamed', or similar does not work. The
location list ends up having entries that look like this:

    unnamed|1 col 8 E123| some message

If the unsaved buffer ia buffer 1, then the message above is parsed as:

    {'items': [{'bufnr': 2, 'lnum': 1, 'col': 8, 'text': 'some message', ...}]}

Therefore, selecting such entries causes a new buffer 2 to be created.

How do I generate location list entries that refer to the proper unsaved
buffer?

There is a item in the  todo list for more than 20 years now for this:

-   Add %b to 'errorformat': buffer number. (Yegappan Lakshmanan / Suresh Govindachar)

- Yegappan

--
--
You received this message from the "vim_use" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php

---
You received this message because you are subscribed to the Google Groups "vim_use" group.
To unsubscribe from this group and stop receiving emails from it, send an email to vim_use+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/vim_use/CAAW7x7nVk9-jZ1f%2B-9hKuHUyBmvNLm56FG4-e02vuxHamvXX0g%40mail.gmail.com.