A dumb shell command cacher.

cache.sh

# Usage `cache ls` or `cache ./myScript.sh`
cache() {
  local expiry_minutes=20
  local command_name="$1"
  local command_hash=$(echo "$*" | md5sum | cut -d' ' -f1)

  local cache_dir="$HOME/.cache/cli_cache"
  local command_cache_dir="$cache_dir/$command_name"
  local cache_file="$cache_dir/$command_hash"

  # If command is "c" or "clear", clear the cache directory
  if [ "$command_name" = "clear" ] ||  [ "$command_name" = "c" ]; then
    # echo "Clearing cache: $cache_dir"
    rm -rf "$cache_dir"
    return
  fi

  # Create cache directory and file if they don't
  mkdir -p "$cache_dir"

  mod_time=$(stat -f %m "$cache_file" 2>/dev/null)
  current_time=$(date +%s)
  minutes_old=$(((current_time - mod_time) / 60))

  # Check if cache file exists and is not older than 20 minutes
  if [ "$minutes_old" -ge $expiry_minutes ]; then
    if [ -f "$cache_file" ]; then
      # echo "Cache file is $minutes_old minutes old (>=$expiry_minutes), updating cache: $cache_file"
    else
      # echo "Cache file does not exist, creating cache: $$cache_file"
      touch "$cache_file"
    fi

    # Supposedly does colors, but it doesn't seem to work for me
    script -q "$cache_file" "$*"

    # Doesn't do colors
    # "$@" > "$cache_file"

    # Doesn't do colors
    # "$@" | tee "$cache_file"
  else
    # echo "File is $minutes_old minutes old (<$expiry_minutes), using cache: $cache_file"
    cat "$cache_file"
  fi
}