#!/bin/sh
# bootstrap/node
#
# Node-finding script for all `sh` environments, including Linux, MSYS2,
# Git for Windows, and GitHub Desktop. Invokable from CLI or automation.
#
# If a node.exe installed by `node_.ps1` is present, it will be used.
# Otherwise, this script requires a system `node` to be provided.
set -e

# Convenience variables
Bootstrap="$(dirname "$0")"
Cache="$Bootstrap/.cache"
if [ "$TG_BOOTSTRAP_CACHE" ]; then
	Cache="$TG_BOOTSTRAP_CACHE"
fi
OldPWD="$PWD"
cd "$Bootstrap/../.."
. ./dependencies.sh  # sets NODE_VERSION_PRECISE
cd "$OldPWD"
NodeVersion="$NODE_VERSION_PRECISE"
NodeFullVersion="node-v$NodeVersion-win-x64"
NodeDir="$Cache/$NodeFullVersion"
NodeExe="$NodeDir/node.exe"
Log="$Cache/last-command.log"

# If a bootstrapped Node is not present, search on $PATH.
if [ "$(uname)" = "Linux" ] || [ ! -f "$NodeExe" ]; then
	if [ "$TG_BOOTSTRAP_NODE_LINUX" ]; then
		NodeFullVersion="node-v$NodeVersion-linux-x64"
		NodeDir="$Cache/$NodeFullVersion/bin"
		NodeExe="$NodeDir/node"

		if [ ! -f "$NodeExe" ]; then
			mkdir -p "$Cache"
			Archive="$(realpath "$Cache/node-v$NodeVersion.tar.gz")"
			curl "https://nodejs.org/download/release/v$NodeVersion/$NodeFullVersion.tar.gz" -o "$Archive"
			(cd "$Cache" && tar xf "$Archive")
		fi
	elif command -v node >/dev/null 2>&1; then
		NodeExe="node"
	else
		echo
		if command -v apt-get >/dev/null 2>&1; then
			# Ubuntu advice
			echo "Please install Node using your system's package manager:"
			echo "    sudo apt-get install nodejs"
		elif uname | grep -q MSYS; then
			# MSYS2 (not packaged) or Git for Windows advice
			echo "Please run bootstrap/node.bat instead of bootstrap/node once"
			echo "to install Node automatically, or install it from https://nodejs.org/"
		elif command -v pacman >/dev/null 2>&1; then
			# Arch advice
			echo "Please install Node using your system's package manager:"
			echo "    sudo pacman -S nodejs"
		else
			# Generic advice
			echo "Please install Node from https://nodejs.org/ or using your system's package manager."
		fi
		echo
		exit 1
	fi
fi

# Cheap shell function if tee.exe is not available
if ! command -v tee >/dev/null 2>&1; then
	tee() {
		# Fudge: assume $1 is always "-a"
		while read -r line; do
			echo "$line" >> "$2"
			echo "$line"
		done
	}
fi

# Invoke Node with all command-line arguments
mkdir -p "$Cache"
printf '%s\n' "$NodeExe" "$@" > "$Log"
printf -- '---\n' >> "$Log"
exec 4>&1
PATH="$(readlink -f "$NodeDir"):$PATH"  # Set PATH so that recursive calls find it
exitstatus=$({ { set +e; "$NodeExe" "$@" 2>&1 3>&-; printf %s $? >&3; } 4>&- | tee -a "$Log" 1>&4; } 3>&1)
exec 4>&-
exit "$exitstatus"