add install.sh for local and remote installation

install.sh

@@ -0,0 +1,85 @@
+#!/bin/bash
+
+set -e
+
+# Change to script directory
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cd "$SCRIPT_DIR"
+
+# Function to check if running locally with proper module
+check_local_install() {
+    if [ -f "go.mod" ]; then
+        FIRST_LINE=$(head -n 1 go.mod)
+        if [ "$FIRST_LINE" = "module github.com/goplus/llgo" ]; then
+            return 0
+        fi
+    fi
+    return 1
+}
+
+# Function to get latest release version
+get_latest_version() {
+    curl --silent "https://api.github.com/repos/goplus/llgo/releases/latest" |
+    grep '"tag_name":' |
+    sed -E 's/.*"([^"]+)".*/\1/'
+}
+
+# Function to get system information
+get_system_info() {
+    ARCH=$(uname -m)
+    OS=$(uname -s | tr '[:upper:]' '[:lower:]')
+
+    case $ARCH in
+        x86_64) ARCH="amd64" ;;
+        aarch64) ARCH="arm64" ;;
+    esac
+
+    echo "${OS}-${ARCH}"
+}
+
+# Function to install from local source
+install_local() {
+    echo "Installing llgo from local source..."
+    cd compiler
+    go install ./cmd/llgo
+    echo "Local installation complete."
+    echo "llgo is now available in your GOPATH."
+}
+
+# Function to install from remote release
+install_remote() {
+    VERSION=$(get_latest_version)
+    VERSION_NO_V=${VERSION#v}  # Remove the 'v' prefix
+    SYSTEM=$(get_system_info)
+    INSTALL_DIR="$HOME/.llgo"
+    DOWNLOAD_URL="https://github.com/goplus/llgo/releases/download/${VERSION}/llgo${VERSION_NO_V}.${SYSTEM}"
+
+    echo "Installing llgo ${VERSION} for ${SYSTEM}..."
+
+    # Create installation directory
+    mkdir -p "$INSTALL_DIR"
+
+    # Download and extract
+    curl -L "$DOWNLOAD_URL.tar.gz" | tar xz -C "$INSTALL_DIR"
+
+    # Handle old package structures
+    if [ -f "$INSTALL_DIR/llgo" ]; then
+        mkdir -p "$INSTALL_DIR/bin"
+        mv "$INSTALL_DIR/llgo" "$INSTALL_DIR/bin/"
+    fi
+
+    echo "Installation complete!"
+    echo
+    echo "Please add the following line to your shell configuration file (.bashrc, .zshrc, etc.):"
+    echo "export PATH=\$PATH:$INSTALL_DIR/bin"
+    echo
+    echo "Then restart your shell or run:"
+    echo "source ~/.bashrc  # or source ~/.zshrc"
+}
+
+# Main installation logic
+if check_local_install; then
+    install_local
+else
+    install_remote
+fi