[FEATURE] restore nvim-tree folder structure base on deepest restored buffer?

[tmpm697]

I have some buffers to restore at startup of nvim.
I also have nvim-tree setup and start when nvim start.

current behavior is that when i start nvim: nvim, auto-session will restore and put me/cursor to buffer of nvim-tree with all folders closed.

but i want the folders are expanded bases on the deepest buffer on the session.
i.e:

tree
fder1/file1
fder2/fder3/file3
fder4/fder5/fder6/fder7/file8
fder9/fder10/fder11/fder12/fder13/fder14/file15

so if after restore session i have file3 in buffer, i want nvim-tree also expand its folder structure to fder3/
if after restore session i have file8 in buffer, i want nvim-tree also expand its folder struture to fder8/

[rmagatti]

Hey 👋 auto-session has exactly zero control over how nvim-tree gets restored. You can try to use a post_restore hook to run whatever command makes nvim-tree do what you want it to do.

Relevant issue:
#105 (comment)

[tmpm697]

After doing some tests, this works for me on nvim v0.8.2:

lua << EOF
require("auto-session").setup{
  pre_save_cmds = {"NvimTreeClose"}
}
EOF

autocmd VimEnter * :NvimTreeToggle

With above config, worked means nvim-tree will expand to last open/focused buffer --> this is what i want.

Thanks.

[tmpm697]

@rmagatti : how can i restore nvimtree when i switch sessions?

I use auto-session with telescope-project.nvim and from your comment here I've set restore_upcoming_session = true,. I now can switch between projects by :Telescope project and then ctrl-l to switch to it.

It switched ok (all buffers restored ok) but I want nvim-tree also opened after switched to new project (despite of current/old session having nvim-tree open or not, switching to project always have nvim-tree closed)

I had this setup of auto-session:

    require("auto-session").setup({
      pre_save_cmds = { "NvimTreeClose" },
      pre_restore_cmds = { "NvimTreeOpen" },
      cwd_change_handling = {
        restore_upcoming_session = true,
        pre_restore_cmds = { "NvimTreeOpen" }, -- having this or not, still same result
      },
    })

note, this time i use lua instead of vimscript.
so how can i open nvimtree after switch project (or actually session)?

Basically i want to ask how to switch projects (sessions) and having it like exactly like you just restore a session? meaning switching == restoring behavior.

[rmagatti]

It's likely just a timing issue.

You're using pre_restore_cmds but that only runs before the session is in fact restored. You want to do post_restore_cmds so NvimTreeOpen runs after the session has already been restored.

Also, note cwd_change_handling doesn't take pre_restore_cmds.

[tmpm697]

tks but:

require("auto-session").setup({
  <..>
  post_restore_cmds = { "NvimTreeOpen" },
  <...>
})

will keep cursor at nvimtree buffer, that's not what i want, as i want: open nvim-tree at pre-restore -> restore -> cursor at last focused buffer ----> how can i do this?
or if use post_restore_cmds = { "NvimTreeOpen" }, how can i auto switch over buffer after switched to new project/session?

[rmagatti]

The cursor moves to the nvim-tree buffer because that's apparently the behaviour nvim-tree chooses. Auto Session has no control over what happens when you call NvimTreeOpen. You can try and check if there's a config in nvim-tree that disables auto-focusing the tree buffer.

[tmpm697]

thanks, nvim-tree does not have that feature close but not focus, switched to neotree for that and worked like a charm now.

[tmpm697]

I got this issue, step (clean up/remove all saved session files from cache):

1. use :Telescope project to create project/session A and B (with different directory)
2. cd "$(mktemp -d)"
3. nvim
4. :Telescope project and then ctrl-l to switch session A, and then open some buffers
5. same as 4 but with B
6. switch back and forth between A and B --> perfect, bufferline.nvim show its bar and buffers' name/title
7. exit nvim
8. nvim
9. select project A and B back and forth 
10. observe that there're no bufferline's bar exist --> bufferline completely not appear

why and how bufferline disappear when restore session and its' not happen in first session when create them. @rmagatti 

after 10 if i go to A project's folder and then start nvim, bufferline shows as usual.

[tmpm697]

after 8 if stay in one of project A or B and open nvim, and switch A and B back and forth, the issue is not happens. Only if i cd to a folder that is not current A or B, the issue is happen @rmagatti

EDIT: again this issue is not happens when i'm open nvim under exactly path of a project (sub or parent folder still have issue)

[tmpm697]

can you re-open this? or should i create a new one?

[rmagatti]

At this point, I don't think the issues you're seeing have anything to do with auto-session. If you'd like to open a discussion instead to get help with your config that should work better, or even reach out in the Neovim channel in Matrix. Happy to help with anything specific to auto-session though 👍

[tmpm697]

switched to https://github.com/noib3/nvim-cokeline and don't see this issue: akinsho/bufferline.nvim#655