create a local go playground

goplay.sh

#!/usr/bin/env bash 
# default root directory for goplay
GOPLAY_ROOT=""$HOME/goplay""

# fn:goplay:create a go playground
function goplay() {
  local module_name="${1:-anon}"
  local ts="$(date +%Y-%m-%d_%H%M%S)"
  local dirname="$GOPLAY_ROOT/$module_name-$ts"
  local go_version=$(go version | awk '{print $3}' | sed -e 's/go//' | awk -F. '{print $1"."$2}')
  mkdir -p "$dirname"
  echo "creating $dirname/main.go"
  cat <<EOF >"$dirname/main.go"
  package main

  import (
    "log"
    "os"
  )

  func main() {
    log.Println("your code here...")
    os.Exit(0)
  }
EOF

  echo "creating $dirname/go.mod"
  cat <<EOF >"$dirname/go.mod"
  module $module_name

  go $go_version
EOF

  cd "$dirname"
  echo "$dirname"
  ls -l
}

goplay $@