DiffviewOpen throws an error if file already open

[mikesmithgh]

I often open a separate terminal (Kitty on OSX) to run Diffview on a project that I already have open. If files are already open and created a swap file, then DiffviewOpen will throw an error.

Steps to reproduce:

1. mkdir tempdir && cd tempdir && git init && echo "test" > test.txt
2. nvim test.txt
3. In a new terminal, nvim -c ":DiffviewOpen"
4. Nvim prompts that swap file exits
5. Type o
6. Diffview throws an error

   Error executing vim.schedule lua callback: ...ck/packer/start/plenary.nvim/lua/plenary/async/async.lua:18: The coroutine failed with this message: ...ack/packer/start/dif
   fview.nvim/lua/diffview/vcs/file.lua:138: Error executing lua: ...ack/packer/start/diffview.nvim/lua/diffview/vcs/file.lua:139: Vim(edit):E325: ATTENTION                 
   stack traceback:                                                                                                                                                          
       [C]: in function 'cmd'                                                                                                                                            
       ...ack/packer/start/diffview.nvim/lua/diffview/vcs/file.lua:139: in function <...ack/packer/start/diffview.nvim/lua/diffview/vcs/file.lua:138>                    
       [C]: in function 'resume'                                                                                                                                         
       ...ck/packer/start/plenary.nvim/lua/plenary/async/async.lua:45: in function <...ck/packer/start/plenary.nvim/lua/plenary/async/async.lua:44>                      
   stack traceback:                                                                                                                                                          
       [C]: in function 'error'                                                                                                                                          
       ...ck/packer/start/plenary.nvim/lua/plenary/async/async.lua:18: in function 'callback_or_next'                                                                    
       ...ck/packer/start/plenary.nvim/lua/plenary/async/async.lua:45: in function <...ck/packer/start/plenary.nvim/lua/plenary/async/async.lua:44> 

Workaround

Close open file to remove swap file before running DiffviewOpen or just use it in the same nvim session.

[sindrets]

Given that you:

1. Use swap files
2. Know the risk of editing a file with a swap from multiple editor instances
3. Want to do so anyway

... Have you considered just disabling the swap conflict warning?

In case you didn't know, you can do this by appending A to your 'shortmess':

set shortmess+=A

[sindrets]

Closing due to inactivity from OP.