macOS App Version Finder Bash Script

#!/bin/bash
# Interactive App Version Finder for macOS with multi-search capability

# Define directories to search for applications.
APP_DIRS=("/Applications" "$HOME/Applications")

# Initialize an array to store found apps.
apps=()

# Search for .app directories (non-recursive) in defined directories.
for dir in "${APP_DIRS[@]}"; do
  if [ -d "$dir" ]; then
    while IFS= read -r -d $'\0' app; do
      apps+=("$app")
    done < <(find "$dir" -maxdepth 1 -type d -name "*.app" -print0)
  fi
done

# Check if any apps were found.
if [ ${#apps[@]} -eq 0 ]; then
  echo "No applications found in ${APP_DIRS[*]}."
  exit 1
fi

# Main interactive loop.
while true; do
  echo ""
  echo "Available Applications:"
  for i in "${!apps[@]}"; do
    echo "[$i] $(basename "${apps[$i]}")"
  done
  echo "[q] Quit"
  
  read -p "Enter the number of the app to check its version (or 'q' to quit): " input

  # Check for the quit option.
  if [[ "$input" =~ ^[Qq]$ ]]; then
    echo "Exiting."
    exit 0
  fi

  # Validate input is a number and within range.
  if ! [[ "$input" =~ ^[0-9]+$ ]] || [ "$input" -ge "${#apps[@]}" ]; then
    echo "Invalid selection. Please try again."
    continue
  fi

  APP_PATH="${apps[$input]}"
  APP_NAME=$(basename "$APP_PATH" .app)

  # Retrieve the version information from the app's Info.plist.
  VERSION=$(defaults read "$APP_PATH/Contents/Info" CFBundleShortVersionString 2>/dev/null)

  if [ -z "$VERSION" ]; then
    echo "Version information not found for $APP_NAME."
  else
    echo "$APP_NAME version: $VERSION"
  fi

  echo ""
  # Ask if the user wants to perform another search.
  read -p "Do you want to search for another app? (y/n): " answer
  if [[ ! "$answer" =~ ^[Yy]$ ]]; then
    echo "Exiting."
    exit 0
  fi
done