util/utils.go

package util

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

// FileExists Checks if a file with the given file name exists
func FileExists(fileName string) bool {
	if _, err := os.Stat(fileName); os.IsNotExist(err) {
		return false
	}
	return true
}

// JoiningSlash joining http path elements
func JoiningSlash(elem ...string) string {
	return joiningSlash(elem)
}

func joiningSlash(elem []string) string {
	path := ""
	for _, e := range elem {
		if e != "" {
			if path == "" {
				path = e
			} else {
				path = singleJoiningSlash(path, e)
			}
		}
	}
	return path
}

func singleJoiningSlash(a, b string) string {
	filepath.Join(a, b)
	aslash := strings.HasSuffix(a, "/")
	bslash := strings.HasPrefix(b, "/")
	switch {
	case aslash && bslash:
		return a + b[1:]
	case !aslash && !bslash:
		return a + "/" + b
	}
	return a + b
}

// GetGlobalConfigurationFile returns OS specific file location
func GetGlobalConfigurationFile(appname string, file string) string {
	return filepath.Join(GetGlobalConfigurationDirectory(appname), file)
}