collapse other directories, but only open the directory of current buffer.

[zztczcx]

so when I jump between buffers, I only want the current buffer's nested directory to open and display in sidebar.
I don't want to have other directories open that is not belong to my current buffer.

the only solution I can think of is

run :NvimTreeCollapse first, then open NvimTree.

is there other better solution? without typing command.

[alex-courtis]

You could use a little bit of automation like this:

local nt_api = require("nvim-tree.api")

local function collapse_and_find(data)
  nt_api.tree.collapse_all()
  nt_api.tree.find_file(data.file)
end

vim.api.nvim_create_autocmd({ "BufEnter" }, { callback = collapse_and_find })

You could add some filtering of filetypes / buffer types etc. however I'll leave that as an exercise for the reader.

[zztczcx]

@alex-courtis , Thanks for your reply.
it is almost what I want. except it needs one small improvement.
For example, when I have two buffers.
when I jump between them, the nvim-tree only open its corresponding directories, which is very good.
however, if I [C-w H] jump to the nvim-tree. all directories collapse.
can I keep nvim-tree open directory of the current-butter ? (the one that displayed, I know on bufferline, there is no buffer focused).
should I bind the function to another autocmd?

[alex-courtis]

when I have two buffers. when I jump between them, the nvim-tree only open its corresponding directories, which is very good. however, if I [C-w H] jump to the nvim-tree. all directories collapse.

Ideas:

  -- only collapse when we have changed to a buffer with a real file on disk
  if vim.fn.filereadable(data.file) ~= 1 then
    return
  end

  -- don't collapse when entering nvim-tree
  if vim.bo[data.buf].buftype == "NvimTree" then
    return
  end

See #1669 (comment) for more ideas.

should I bind the function to another autocmd?

You could. There are probably better events to use than BufEnter.