Install "nvim" on Ubuntu/Debian

install_neovim_ubuntu.sh

#!/bin/bash
#######################################################################
# Install "nvim" on Ubuntu/Debian
#
# Author:  lambdalisue
# License: MIt
#
#######################################################################
if ! which porg >/dev/null 2>&1; then
  echo 'A program manager "porg" is required.'
  echo 'Install it via the following command'
  echo ''
  echo '  curl -sL git.io/vXTo7 | bash'
  echo ''
  echo 'Ref: https://gist.github.com/lambdalisue/161aa84af9a9ff7d3bfe9decfabf656a'
  exit 1
fi
set -e

unset rep

atexit() {
  [[ -d "$rep" ]] && rm -rf $rep
}
trap atexit HUP INT QUIT TERM

sudo apt-get install -y libtool autoconf automake cmake g++ pkg-config unzip

# Latest Ubuntu/Debian also require 'libtool-bin'
set +e
sudo apt install -y libtool-bin > /dev/null 2>&1
set -e

rep=$(realpath $(mktemp -d nvim.XXXXXX))

# Clone the neovim repository
git clone --depth 1 --single-branch https://github.com/neovim/neovim $rep

cd $rep
make deps
make CMAKE_BUILD_TYPE=Releas -j $(grep -c '^processor' /proc/cpuinfo)
sudo porg -lp 'neovim' 'make install'

atexit

Porg installer you link in error message, did not worked for me, but the following did:

apt install porg

Also, i had to run it in

sudo -i

mode to avoid Permission issues.

Note here: this mode is not suggested as it's running every command in root, read throug any script you run like this!