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utils.go
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// Copyright 2015-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"). You may
// not use this file except in compliance with the License. A copy of the
// License is located at
//
// http://aws.amazon.com/apache2.0/
//
// or in the "license" file accompanying this file. This file 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 utils provides some utility functions. This is the kitchen sink.
package utils
import (
"fmt"
"os"
"github.com/aws/aws-sdk-go/aws/awserr"
)
const (
// ECSCLIResourcePrefix is prepended to the names of resources created through the ecs-cli
ECSCLIResourcePrefix = "amazon-ecs-cli-setup-"
)
// InSlice checks if the given string exists in the given slice:
func InSlice(str string, list []string) bool {
for _, s := range list {
if s == str {
return true
}
}
return false
}
// GetHomeDir returns the file path of the user's home directory.
func GetHomeDir() (string, error) {
// Can not use user.Current https://github.com/golang/go/issues/6376
homeDir := os.Getenv("HOME") // *nix
if homeDir == "" { // Windows
homeDir = os.Getenv("USERPROFILE")
}
if homeDir == "" {
return "", fmt.Errorf("user home directory not found")
}
return homeDir, nil
}
// EntityAlreadyExists returns true if an error indicates that the AWS resource already exists
func EntityAlreadyExists(err error) bool {
if awsErr, ok := err.(awserr.Error); ok {
return awsErr.Code() == "EntityAlreadyExists"
}
return false
}