install.sh

#!/bin/bash

set -Eeuo pipefail

NEOVIM_CONFIG="$HOME/.config/nvim"
NEOVIM_BACKUP="$NEOVIM_CONFIG.backup"
BACKUP_EXISTS=false

execute() {
	echo "$*"
	"$@"
}

log() {
	printf 'INFO: %s\n' "$1"
}

err() {
	printf 'ERROR: %s\n' "$1" >&2
}

restore_from_backup() {
	trap - ERR
	err "Something went wrong! Restoring Neovim config from backup..."
	execute rm -rf "$NEOVIM_CONFIG"
	execute mv "$NEOVIM_BACKUP" "$NEOVIM_CONFIG"
	log "Successfully restored Neovim from backup. Exiting..."
}

failure() {
	trap - ERR
	err "Something went wrong! Exiting..."
}

if test -e "$NEOVIM_BACKUP"; then
	err "A backup already exists at \`$NEOVIM_BACKUP\`. Move or delete it, then try again."
	exit 1
fi

if test -e "$NEOVIM_CONFIG"; then
	execute mv "$NEOVIM_CONFIG" "$NEOVIM_BACKUP"
	BACKUP_EXISTS=true
	trap restore_from_backup ERR
	log "Successfully created backup of current Neovim config at $NEOVIM_BACKUP"
else
	trap failure ERR
	log "No preexisting Neovim config found. Continuing without backup..."
fi

# Runtimes the language servers are built/run with, the tools Telescope and
# conform.nvim shell out to, and the archive tools Mason needs to unpack packages.
pkgs=(
	git
	neovim
	tree-sitter-cli
	dotnet-sdk
	go
	npm
	python
	jdk21-openjdk
	rust
	tar
	unzip
	curl
	ripgrep
	fd
	prettier
	stylua
	ruff
	clang
)

log "Installing dependencies: ${pkgs[*]}"

execute sudo pacman -Sy --needed --noconfirm "${pkgs[@]}"

# Not packaged for Arch; conform.nvim formats shell scripts with it.
if command -v shuck >/dev/null 2>&1; then
	log "shuck is already installed. Skipping..."
else
	log "Installing shuck (shell formatter) with cargo"
	execute cargo install shuck-cli
fi

log "Installing Neovim config"
execute git clone "https://github.com/borgaar/nvim" "$NEOVIM_CONFIG"

if $BACKUP_EXISTS; then
	log "DONE! Backup of previous config is at $NEOVIM_BACKUP"
	log "Exiting..."
else
	log "DONE! Exiting..."
fi