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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
package whisk
import (
// Sortable items are anything that needs to be sorted for listing purposes.
type Sortable interface {
// Compare(sortable) compares an two sortables and returns true
// if the item calling the Compare method is less than toBeCompared.
// Sorts alphabetically by default, can have other parameters to sort by
// passed by sortByName.
Compare(toBeCompared Sortable) bool
// Printable items are anything that need to be printed for listing purposes.
type Printable interface {
ToHeaderString() string // Prints header information of a Printable
ToSummaryRowString() string // Prints summary info of one Printable
// addOptions adds the parameters in opt as URL query parameters to s. opt
// must be a struct whose fields may contain "url" tags.
func addRouteOptions(route string, options interface{}) (*url.URL, error) {
Debug(DbgInfo, "Adding options %+v to route '%s'\n", options, route)
u, err := url.Parse(route)
if err != nil {
Debug(DbgError, "url.Parse(%s) error: %s\n", route, err)
errStr := wski18n.T("Unable to parse URL '{{.route}}': {{.err}}",
map[string]interface{}{"route": route, "err": err})
werr := MakeWskError(errors.New(errStr), EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
return nil, werr
v := reflect.ValueOf(options)
if v.Kind() == reflect.Ptr && v.IsNil() {
return u, nil
qs, err := query.Values(options)
if err != nil {
Debug(DbgError, "query.Values(%#v) error: %s\n", options, err)
errStr := wski18n.T("Unable to process URL query options '{{.options}}': {{.err}}",
map[string]interface{}{"options": fmt.Sprintf("%#v", options), "err": err})
werr := MakeWskError(errors.New(errStr), EXIT_CODE_ERR_GENERAL, DISPLAY_MSG, NO_DISPLAY_USAGE)
return nil, werr
u.RawQuery = qs.Encode()
Debug(DbgInfo, "Returning route options '%s' from input struct %+v\n", u.String(), options)
return u, nil
func PrintJSON(v interface{}) {
output, _ := prettyjson.Marshal(v)
fmt.Fprintln(color.Output, string(output))
func GetURLBase(host string, path string) (*url.URL, error) {
if len(host) == 0 {
errMsg := wski18n.T("An API host must be provided.\n")
whiskErr := MakeWskError(errors.New(errMsg), EXIT_CODE_ERR_GENERAL,
return nil, whiskErr
if !strings.HasPrefix(host, "http") {
host = "https://" + host
urlBase := fmt.Sprintf("%s%s", host, path)
url, err := url.Parse(urlBase)
if len(url.Scheme) == 0 || len(url.Host) == 0 {
urlBase = fmt.Sprintf("https://%s%s", host, path)
url, err = url.Parse(urlBase)
return url, err