Add neovim install script

run_once_install-neovim.sh.tmpl

@@ -0,0 +1,32 @@
+#!/bin/bash
+set -euo pipefail
+
+NVIM_DIR="${HOME}/apps/neovim"
+BUILD_TYPE="Debug"
+BRANCH="master"
+
+echo "Installing neovim from source"
+echo "Target folder: ${NVIM_DIR}"
+echo "Branch: ${BRANCH}"
+echo "Build type: ${BUILD_TYPE}"
+
+{{ if eq .chezmoi.osRelease.idLike "arch" }}
+sudo pacman -S --noconfirm --needed base-devel cmake ninja curl git
+{{ end }}
+
+mkdir -p "${HOME}/apps"
+
+if [[ -d "${NVIM_DIR}/src" ]]; then
+  cd "${NVIM_DIR}/src"
+  git fetch --all --prune
+  git checkout "${BRANCH}"
+  git pull
+else
+  git clone https://github.com/neovim/neovim.git "${NVIM_DIR}/src"
+  cd "${NVIM_DIR}/src"
+  git checkout "${BRANCH}"
+fi
+
+rm -r build/
+make CMAKE_EXTRA_FLAGS="-DCMAKE_INSTALL_PREFIX=${NVIM_DIR}"
+make install