Fix broken shell integration with nvm for Zsh and Bash

src/shell-integration/startup-scripts/init-posix.sh

@@ -0,0 +1,81 @@
+
+function installIfCommandNotFound() {
+  local cmd="$1"
+  
+  # Check if the command already exists
+  if command -v "$cmd" > /dev/null 2>&1; then
+    return 0
+  fi
+  
+  # Check if Node.js version is below 18
+  # Safe-chain requires Node.js 18 or higher
+  local node_version=$(node -v | sed 's/v//' | cut -d'.' -f1)
+  if [ "$node_version" -lt 18 ]; then
+    return 2
+  fi
+  
+  # Command not found, ask user if they want to install safe-chain
+  printf "The command '%s' is not available. Do you want to install safe-chain to provide it? (y/N): " "$cmd"
+  read -r response
+  
+  if [[ "$response" =~ ^[Yy]$ ]]; then
+    printf "Installing safe-chain...\n"
+    installSafeChain
+    
+    if [ $? -ne 0 ]; then
+      printf "\nFailed to install safe-chain. Exiting.\n"
+      return 1
+    fi
+    
+    return 0
+  else
+    printf "Skipping safe-chain installation. Using original command instead.\n"
+    return 2
+  fi
+}
+
+function installSafeChain() {
+  command npm install -g @aikidosec/safe-chain
+  
+  if [ $? -ne 0 ]; then
+    return 1
+  fi
+
+  printf "------\n"
+}
+
+function wrapCommand() {
+  local original_cmd="$1"
+  local aikido_cmd="$2"
+
+  # Remove the first 2 arguments (original_cmd and aikido_cmd) from $@
+  # so that "$@" now contains only the arguments passed to the original command
+  shift 2
+  
+  installIfCommandNotFound "$aikido_cmd"
+  local install_result=$?
+  if [ $install_result -eq 2 ]; then
+    command "$original_cmd" "$@"
+  else
+    "$aikido_cmd" "$@"
+  fi
+}
+
+function npx() {
+  wrapCommand "npx" "aikido-npx" "$@"
+}
+
+function yarn() {
+  wrapCommand "yarn" "aikido-yarn" "$@"
+}
+
+function npm() {
+  if [[ "$1" == "-v" || "$1" == "--version" ]] && [[ $# -eq 1 ]]; then
+    # If args is just -v or --version and nothing else, just run the npm version command
+    # This is because nvm uses this to check the version of npm
+    command npm "$@"
+    return
+  fi
+
+  wrapCommand "npm" "aikido-npm" "$@"
+}