luals_install.sh

#!/usr/bin/env bash

set -e
set -u
set -o pipefail
set -C

# Configuration
REPO="LuaLS/lua-language-server"
BIN_NAME="lua-language-server"
INSTALL_DIR="${HOME}/.local/share/${BIN_NAME}"
BIN_DIR="${HOME}/.local/bin"

echo "Detecting OS and Architecture..."
OS=$(uname -s | tr '[:upper:]' '[:lower:]')
ARCH=$(uname -m)

case "$OS" in
    linux) OS="linux" ;;
    darwin) OS="darwin" ;;
    *)
        echo "Error: Unsupported OS: $OS"
        exit 1
        ;;
esac

case "$ARCH" in
    x86_64) ARCH="x64" ;;
    aarch64) ARCH="arm64" ;;
    arm64) ARCH="arm64" ;;
    *)
        echo "Error: Unsupported Architecture: $ARCH"
        exit 1
        ;;
esac

echo "Fetching the latest version..."
# Get latest release tag name (e.g., 3.7.4)
REMOTE_VERSION=$(curl -s "https://api.github.com/repos/${REPO}/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')

if [ -z "$REMOTE_VERSION" ]; then
    echo "Error: Could not determine latest version."
    exit 1
fi

# --- Check existing installation ---
INSTALLED_BIN="${BIN_DIR}/${BIN_NAME}"
if [ -x "$INSTALLED_BIN" ]; then
    # Get local version.
    # Output format of lua-language-server --version is typically: "lua-language-server 3.7.4"
    # We extract the last field using awk.
    LOCAL_VERSION=$("$INSTALLED_BIN" --version 2>/dev/null | awk '{print $NF}')

    if [ "$LOCAL_VERSION" = "$REMOTE_VERSION" ]; then
        echo ""
        echo "Latest version (${REMOTE_VERSION}) is already installed."
        echo "Skipping installation."
        exit 0
    else
        echo "Update available: ${LOCAL_VERSION} -> ${REMOTE_VERSION}"
    fi
fi
# ----------------------------------

FILENAME="${BIN_NAME}-${REMOTE_VERSION}-${OS}-${ARCH}.tar.gz"
DOWNLOAD_URL="https://github.com/${REPO}/releases/download/${REMOTE_VERSION}/${FILENAME}"

echo "Installing ${BIN_NAME} ${REMOTE_VERSION}..."
echo "Platform: ${OS}-${ARCH}"
echo "URL: ${DOWNLOAD_URL}"

# Prepare directories
mkdir -p "$BIN_DIR"
mkdir -p "$INSTALL_DIR"

# Download and Extract
TEMP_DIR=$(mktemp -d)
echo "Downloading..."
curl -sL "$DOWNLOAD_URL" | tar xz -C "$TEMP_DIR"

# Move files to installation directory
# Remove old files to ensure clean update
rm -rf "${INSTALL_DIR:?}"/*

# The tarball usually extracts into a directory structure or directly.
# LuaLS tarballs typically contain: bin/, main.lua, meta/, script/, etc.
# We move everything from temp dir to install dir.
mv "${TEMP_DIR}"/* "${INSTALL_DIR}/"

# Cleanup
rm -rf "$TEMP_DIR"

# Create symlink
EXECUTABLE_PATH="${INSTALL_DIR}/bin/${BIN_NAME}"
if [ -f "$EXECUTABLE_PATH" ]; then
    chmod +x "$EXECUTABLE_PATH"
    ln -sf "$EXECUTABLE_PATH" "${BIN_DIR}/${BIN_NAME}"
    echo ""
    echo "Installation complete!"
    echo "Binary linked to: ${BIN_DIR}/${BIN_NAME}"
else
    echo "Error: Executable not found at ${EXECUTABLE_PATH}"
    exit 1
fi

echo ""
echo "Please ensure '${BIN_DIR}' is in your PATH."