make_neovim

#!/bin/bash
#
# Downloads the sources of neovim and builds them.

# Create target dir if it does not exist
mkdir -p target

cd "target"

nvim_dir="`pwd`/neovim"

color_green="\E[32m"
color_red="\E[31m"
color_reset="\E[0m"

# parameters:
# $1 - the message to print
function print_msg {
  printf "$color_green>>> $1$color_reset\n"
}

# parameters:
# $1 - the message to print
function print_err {
  printf "$color_red>>> $1$color_reset\n"
}

function build_nvim {
  print_msg "Building neovim."
  make
  build_ret=$?
  # Check the return value of the build
  if [[ $build_ret -eq 0 ]]; then
    print_msg "Building neovim succeeded."
  else
    print_err "Building neovim failed."
  fi
}

# Check if neovim directory exists
if [ -d "$nvim_dir" ]; then
  print_msg "Updating neovim repo."
  cd "$nvim_dir"
  git fetch origin
  merge_res=`git merge origin/master | head -n 1`
  # Check if a new head is available
  if [ "$merge_res" = "Already up-to-date." ]; then
    print_msg "No update needed."
  else
    build_nvim
  fi
else
  print_msg "Cloning neovim repo."
  git clone -b master git://github.com/neovim/neovim "$nvim_dir"
  cd "$nvim_dir"
  build_nvim
fi