paste setup sometimes fails to "set nopaste"

[firedev]

• nvim --version:

$ nvim --version
NVIM v0.2.3-24-gd9b3ebfed
Build type: Release
LuaJIT 2.0.5
Compilation: /usr/local/Homebrew/Library/Homebrew/shims/super/clang -Wconversion -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 -DNVIM_MSGPACK_HAS_FLOAT32 -DNVIM_UNIBI_HAS_VAR_FROM -DNDEBUG -DMIN_LOG_LEVEL=3 -Wall -Wextra -pedantic -Wno-unused-parameter -Wstrict-prototypes -std=gnu99 -Wimplicit-fallthrough -Wvla -fstack-protector-strong -fdiagnostics-color=auto -DINCLUDE_GENERATED_DECLARATIONS -I/tmp/neovim-20171125-11833-1ozpdpl/build/config -I/tmp/neovim-20171125-11833-1ozpdpl/src -I/usr/local/include -I/usr/local/include -I/usr/local/include -I/usr/local/include -I/usr/local/include -I/usr/local/include -I/usr/local/opt/gettext/include -I/usr/include -I/tmp/neovim-20171125-11833-1ozpdpl/build/src/nvim/auto -I/tmp/neovim-20171125-11833-1ozpdpl/build/include
Compiled by pain@nick.local

Features: +acl +iconv +jemalloc +tui
See ":help feature-compile"

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/usr/local/Cellar/neovim/HEAD-d9b3ebf/share/nvim"

Run :checkhealth for more info

• Operating system/version: macOS 10.13.3
• Terminal name/version: iTerm Build 3.1.20170717-nightly
• $TERM: screen-256color

Steps to reproduce using nvim -u NORC

Can't reproduce yet, it works without the config file.

Actual behaviour

I was reporting this before but the issue was renamed #6561

Finally caught it in the wild. Here is what I did:

1. Went to insert mode
2. Pasted something from Alfred clipboard history Cmd-Shift-V, Enter

Result:

1. The fragment was inserted with <Paste> at the end.
2. :verb set et? → noexpandtab

Expected behaviour

• expandtab should stay on.
• There should be no <Paste>

[justinmk]

This is a known issue (yes, it's quite bothersome). Workaround is to

:set nopaste

after pasting. (Edit: or do it automatically in a InsertLeave handler, see below)

[firedev]

Sorry, which issue is known? What about expandtab?

[justinmk]

noexpandtab is one of many side-effects of set paste (see :help 'paste'), which is basically what happens when a paste is detected. When the paste ends, Nvim should :set nopaste, but sometimes it doesn't.

[firedev]

Oh got it, this one was driving me crazy, thanks!

[languitar]

What is the reason for this behavior? I also sometimes see this.

[justinmk]

For those suffering from this, a workaround is to :set nopaste on InsertLeave to ensure that nopaste is always set:

au InsertLeave * set nopaste

(I won't use this workaround myself, else I might forget about the issue :)

[victoriastuart]

---

Update:

See my answer at https://stackoverflow.com/questions/53123297/disable-insert-paste-mode/53285805#53285805

TL/DR:

• disable (comment out or remove) set nopaste in ~/.vimrc
• add these to ~/.vimrc:
  • set clipboard+=unnamed
  • nnoremap p p`]<Esc>
• use p to paste (Normal mode)
• Insert blank line without entering insert mode:
  • above current line: nmap <A-CR> O<Esc>
  • below current line: nmap <CR> o<Esc>

---

Related discussion:

• Disable “Insert (paste)” mode  #9203
• https://www.reddit.com/r/neovim/comments/9ufg11/disable_insert_paste_mode/
• https://www.reddit.com/r/vim/comments/9uerhp/disable_insert_paste_mode/
• https://stackoverflow.com/questions/53123297/disable-insert-paste-mode/53285805#53285805

[frabjous]

I'm having a version of this problem, where if I use the terminal emulator's paste-from-clipboard short key (Ctrl-Shift-V for me) when in the command line in neovim, it'll then put me in -- INSERT (paste) -- mode and keep me in it until I manually set nopaste.
Even the workaround does not work for me. Neovim reports nopaste as being set, e.g., if I type in set paste?, but I always get INSERT (paste) mode anyway.