utils.go

package main

import (
	"os"
	"strings"
)

func getEndpoint() (string, error) {
	defaultEndpoint := "unix:///var/run/docker.sock"
	if os.Getenv("DOCKER_HOST") != "" {
		defaultEndpoint = os.Getenv("DOCKER_HOST")
	}

	if endpoint != "" {
		defaultEndpoint = endpoint
	}

	_, _, err := parseHost(defaultEndpoint)
	if err != nil {
		return "", err
	}

	return defaultEndpoint, nil
}

// splitKeyValueSlice takes a string slice where values are of the form
// KEY, KEY=, KEY=VALUE  or KEY=NESTED_KEY=VALUE2, and returns a map[string]string where items
// are split at their first `=`.
func splitKeyValueSlice(in []string) map[string]string {
	env := make(map[string]string)
	for _, entry := range in {
		parts := strings.SplitN(entry, "=", 2)
		if len(parts) != 2 {
			parts = append(parts, "")
		}
		env[parts[0]] = parts[1]
	}
	return env

}

// pathExists returns whether the given file or directory exists or not
func pathExists(path string) (bool, error) {
	_, err := os.Stat(path)
	if err == nil {
		return true, nil
	}
	if os.IsNotExist(err) {
		return false, nil
	}
	return false, err
}