add ability to set api url in template

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>

builder/digitalocean/api.go

@@ -8,7 +8,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"github.com/mitchellh/mapstructure"
 	"io/ioutil"
 	"log"
 	"net/http"
@@ -16,9 +15,9 @@ import (
 	"strconv"
 	"strings"
 	"time"
-)
 
-const DIGITALOCEAN_API_URL = "https://api.digitalocean.com"
+	"github.com/mitchellh/mapstructure"
+)
 
 type Image struct {
 	Id           uint
@@ -55,23 +54,23 @@ type DigitalOceanClient struct {
 	// The http client for communicating
 	client *http.Client
 
-	// The base URL of the API
-	BaseURL string
-
 	// Credentials
 	ClientID string
 	APIKey   string
+
+	// The base URL of the API
+	APIURL string
 }
 
 // Creates a new client for communicating with DO
-func (d DigitalOceanClient) New(client string, key string) *DigitalOceanClient {
+func (d DigitalOceanClient) New(client string, key string, url string) *DigitalOceanClient {
 	c := &DigitalOceanClient{
 		client: &http.Client{
 			Transport: &http.Transport{
 				Proxy: http.ProxyFromEnvironment,
 			},
 		},
-		BaseURL:  DIGITALOCEAN_API_URL,
+		APIURL:   url,
 		ClientID: client,
 		APIKey:   key,
 	}
@@ -229,7 +228,7 @@ func NewRequest(d DigitalOceanClient, path string, params url.Values) (map[strin
 	params.Set("client_id", d.ClientID)
 	params.Set("api_key", d.APIKey)
 
-	url := fmt.Sprintf("%s/%s?%s", DIGITALOCEAN_API_URL, path, params.Encode())
+	url := fmt.Sprintf("%s/%s?%s", d.APIURL, path, params.Encode())
 
 	// Do some basic scrubbing so sensitive information doesn't appear in logs
 	scrubbedUrl := strings.Replace(url, d.ClientID, "CLIENT_ID", -1)

builder/digitalocean/builder.go

@@ -6,13 +6,14 @@ package digitalocean
 import (
 	"errors"
 	"fmt"
+	"log"
+	"os"
+	"time"
+
 	"github.com/mitchellh/multistep"
 	"github.com/mitchellh/packer/common"
 	"github.com/mitchellh/packer/common/uuid"
 	"github.com/mitchellh/packer/packer"
-	"log"
-	"os"
-	"time"
 )
 
 // see https://api.digitalocean.com/images/?client_id=[client_id]&api_key=[api_key]
@@ -38,6 +39,7 @@ type config struct {
 
 	ClientID string `mapstructure:"client_id"`
 	APIKey   string `mapstructure:"api_key"`
+	APIURL   string `mapstructure:"api_url"`
 	RegionID uint   `mapstructure:"region_id"`
 	SizeID   uint   `mapstructure:"size_id"`
 	ImageID  uint   `mapstructure:"image_id"`
@@ -94,6 +96,11 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 		b.config.ClientID = os.Getenv("DIGITALOCEAN_CLIENT_ID")
 	}
 
+	if b.config.APIURL == "" {
+		// Default to environment variable for api_url, if it exists
+		b.config.APIURL = os.Getenv("DIGITALOCEAN_API_URL")
+	}
+
 	if b.config.Region == "" {
 		if b.config.RegionID != 0 {
 			b.config.Region = fmt.Sprintf("%v", b.config.RegionID)
@@ -153,6 +160,7 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 	templates := map[string]*string{
 		"client_id":     &b.config.ClientID,
 		"api_key":       &b.config.APIKey,
+		"api_url":       &b.config.APIURL,
 		"snapshot_name": &b.config.SnapshotName,
 		"droplet_name":  &b.config.DropletName,
 		"ssh_username":  &b.config.SSHUsername,
@@ -175,6 +183,10 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 			errs, errors.New("a client_id must be specified"))
 	}
 
+	if b.config.APIURL == "" {
+		b.config.APIURL = "https://api.digitalocean.com"
+	}
+
 	if b.config.APIKey == "" {
 		errs = packer.MultiErrorAppend(
 			errs, errors.New("an api_key must be specified"))
@@ -204,7 +216,7 @@ func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
 
 func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
 	// Initialize the DO API client
-	client := DigitalOceanClient{}.New(b.config.ClientID, b.config.APIKey)
+	client := DigitalOceanClient{}.New(b.config.ClientID, b.config.APIKey, b.config.APIURL)
 
 	// Set up the state
 	state := new(multistep.BasicStateBag)