package mg

import (
	"os"
	"path/filepath"
	"runtime"
)

// CacheEnv is the environment variable that users may set to change the
// location where mage stores its compiled binaries.
const CacheEnv = "MAGEFILE_CACHE"

// verboseEnv is the environment variable that indicates the user requested
// verbose mode when running a magefile.
const verboseEnv = "MAGEFILE_VERBOSE"

// Verbose reports whether a magefile was run with the verbose flag.
func Verbose() bool {
	return os.Getenv(verboseEnv) != ""
}

// CacheDir returns the directory where mage caches compiled binaries.  It
// defaults to $HOME/.magefile, but may be overridden by the MAGEFILE_CACHE
// environment variable.
func CacheDir() string {
	d := os.Getenv(CacheEnv)
	if d != "" {
		return d
	}
	switch runtime.GOOS {
	case "windows":
		return filepath.Join(os.Getenv("HOMEDRIVE"), os.Getenv("HOMEPATH"), "magefile")
	default:
		return filepath.Join(os.Getenv("HOME"), ".magefile")
	}
}