neovim-config/install.sh

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#!/bin/sh
_usage() {
printf "%s" \
"Usage: sh ${0##*/} [ options ]
-h | --help => Show this help.
-i | --install => Install the config.
-u | --update => Update the existing config without removing existing stuff.
-b | --backup 'path' => Custom config backup path.
-nb | --no-backup => Don't take existing config backup. Use with caution.
"
exit 0
}
_check_install_dependencies() {
_error_dependencies() {
printf "%s\n" "Error: Install ${1} before proceeding."
exit 1
}
_GIT="$(command -v git)" || _error_dependencies git
_SED="$(command -v sed)" || _error_dependencies sed
return 0
}
_check_nvim_version() {
version_string="$(nvim --version | grep -Eo 'NVIM.*v[0-9.]+' -m 1 | grep -Eo '[0-9.]+')" || return 1
printf "%s\n" "${version_string}" | while IFS=. read -r num1 num2 num3; do
{ [ "${num1}" -ge 0 ] && [ "${num2}" -ge 5 ] && [ "${num3}" -ge 0 ]; } || return 1
done
}
_copy_config() {
printf "%s\n" "Linking config"
printf "%s\n" "Old nvim config will be changed to nvim.bak if exists! :0"
# copying config
if [ -d "${_CONFIG_PATH}" ]; then
printf "%s\n" "Nvim Directory exists"
if [ "${_NO_BACKUP}" = "true" ]; then
printf "%s\n" "Skipping backup as --no-backup flag was passed.."
[ "${_UPDATE}" = "false" ] && rm -rf "${_CONFIG_PATH}"
else
printf "%s\n" "Taking backup of existing config.."
mv "${_CONFIG_PATH}" "${_BACKUP_PATH}" || {
printf "\n%s\n" "Error: Cannot move ${_CONFIG_PATH} to ${_BACKUP_PATH}"
printf "\n%s\n" "Take backup manually or use -b/--backup to provide non-empty path or use -nb/--no-backup to skip backup."
exit 1
}
fi
else
printf "%s\n" "Nvim config doesn't exist, creating it now"
fi
mkdir -p "${_CONFIG_PATH}" || {
printf "%s\n" "Error: Cannot create folder ${_CONFIG_PATH}"
exit 1
}
{ cp -r init.lua lua "${_CONFIG_PATH}"/; } || {
printf "Error: Couldn't copy nvim config\n"
exit 1
}
return 0
}
_setup_terminal_shell() {
_mappings_file="${_CONFIG_PATH}/lua/mappings.lua"
# only ask for shellname if running in terminal
if [ -t 1 ]; then
printf "\n%s\n" "Which shell do you want to use? (Eg. 2)"
printf "\t%s\n" "[ Enter nothing for current shell ( $_CURRENT_SHELL ) ]"
grep '^/bin/' '/etc/shells' | nl
read -r shellNUM
fi
# don't try to do any changes user wants their default shell in nvim
if [ -n "$shellNUM" ]; then
shellpath=$(grep '^/bin/' '/etc/shells' | sed -n "$shellNUM p")
# Reference: https://stackoverflow.com/a/4247319
# \( & \) will use regex brackets (for later reference with \1)
# ( & ) will match text brackets
if "${_SED}" --posix -i'.bak' -e "s=^\(map(.* \+*terminal\) \(.*)\)=\1$shellpath \2=g" "${_mappings_file}"; then
printf "%s\n" "=> Neovim shell changed to $shellpath successfully!"
else
printf "%s\n" "Cannot edit with sed, edit ${_mappings_file} manually to replace bash with $shellpath."
fi
rm -f "${_mappings_file}".bak # delete backup file created by sed
fi
printf "%s\n\n" "=> Neovim shell will be ${shellpath:-${_CURRENT_SHELL}}"
return 0
}
_setup_arguments() {
# default variables to be used
_CONFIG_PATH="${HOME}/.config/nvim"
_UPDATE=""
_BACKUP_PATH="${_CONFIG_PATH}.bak"
_NO_BACKUP="false"
_CURRENT_SHELL="${SHELL##*/}"
_check_longoptions() {
[ -z "${2}" ] &&
printf '%s: %s: option requires an argument\nTry '"%s -h/--help"' for more information.\n' "${0##*/}" "${1}" "${0##*/}" &&
exit 1
return 0
}
while [ $# -gt 0 ]; do
case "${1}" in
-h | --help) _usage ;;
-i | --install) _UPDATE="false" ;;
-u | --update) _UPDATE="true" ;;
-b | --backup)
_check_longoptions "${1}" "${2}"
_BACKUP_PATH="${2}" && shift
;;
-nb | --nobackup) _NO_BACKUP="true" ;;
esac
shift
done
[ -z "${_UPDATE}" ] && {
printf "%s\n" "Error: Either -i/--install or -u/--update flag must be used."
printf "%s\n" "See -h/--help for more info."
exit 1
}
printf "%s\n" \
"CONFIG PATH: ${_CONFIG_PATH}
$(if [ "${_NO_BACKUP}" = "true" ]; then
printf "SKIPPING CONFIG BACKUP !\n"
else
printf "%s\n" "CONFIG BACKUP PATH: ${_BACKUP_PATH}"
fi)
CURRENT SHELL: ${_CURRENT_SHELL}
"
return 0
}
main() {
[ $# = 0 ] && _usage
_check_install_dependencies
_setup_arguments "${@}"
_copy_config
[ "${_UPDATE}" = "false" ] && _setup_terminal_shell
# install all plugins + compile them
if _NVIM="$(command -v nvim)"; then
if _check_nvim_version; then
printf "\n%s\n" "=> Neovim will now open." && sleep 1
"${_NVIM}" +"autocmd User PackerComplete ++once quitall" \
+":lua require 'pluginList' vim.cmd('PackerSync')"
"${_NVIM}"
else
printf "Error: Neovim is installed, but version is lower than 0.5.x, install Neovim >= 5.x and then run nvim & do :PackerSync\n."
fi
else
printf "Error: Neovim is not installed, install Neovim >= 5.x and then run neovim & do :PackerSync.\n"
fi
}
main "${@}"