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utils.go
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/
utils.go
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/**
* Copyright (c) 2015 Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package main
import (
"encoding/json"
"fmt"
"log"
"os"
"strconv"
"time"
)
// ParseInt parses passed string into an Integer
func ParseInt(s string, d int) int {
if len(s) < 1 {
return d
}
//strconv.Btoi64
v, err := strconv.ParseUint(s, 0, 16)
if err != nil {
log.Fatalf("unable to parse int from %s: %v", s, err)
return d
}
return int(v)
}
// GetEnvVarAsString wrapper for env variable with defaults
func GetEnvVarAsString(k, d string) string {
if len(k) < 1 {
return d
}
s := os.Getenv(k)
if len(s) < 1 {
return d
}
return s
}
// GetEnvVarAsInt wrapper utility for env variabler as string
func GetEnvVarAsInt(k string, d int) int {
s := GetEnvVarAsString(k, "")
if len(s) < 1 {
return d
}
return ParseInt(s, d)
}
// SetWithEnvVar sets variable to the string value of the env variable envVariable
// if it is set. If no env variable by the name envVariable is found, variable
// is not changed.
func SetWithStringEnvVar(envVariable string, variable *string) {
envVarVal := os.Getenv(envVariable)
if len(envVarVal) > 0 {
*variable = envVarVal
}
}
// GetEnvVarAsBool wrapper for env variable as Bool
func GetEnvVarAsBool(k string, d bool) bool {
s := GetEnvVarAsString(k, "")
if len(s) < 1 {
return d
}
v, err := strconv.ParseBool(s)
if err != nil {
log.Fatalf("unable to parse bool from %s: %v", s, err)
return d
}
return v
}
// Trace outputs self to object as string
func Trace(str string, o interface{}) {
if args.Trace {
objStr, err := ToString(o)
if err != nil {
log.Printf("unable to marshal: %v", err.Error())
return
}
log.Printf("%s: %s", str, fmt.Sprintln(string(objStr)))
}
}
// ToString returns its representaiton as string
func ToString(o interface{}) (string, error) {
objStr, err := json.Marshal(o)
if err != nil {
log.Printf("unable to marshal: %v", o)
log.Panicln(err)
return "", err
}
return fmt.Sprintln(string(objStr)), nil
}
// GetNowInUtc wrapper for UTC timestamp
func GetNowInUtc() time.Time {
return time.Now().UTC()
}
// GetTime wrapper for time formater
func GetTime(f string) string {
if len(f) < 1 {
f = time.RFC850
}
return fmt.Sprintln(GetNowInUtc().Format(f))
}