Add an override for the DigitalOcean API URL

This allows you to change the default URL for accessing the DigitalOcean
API. It's similar to what you would do when overriding an endpoint in
the AWS provider, only with the DO API it's an all or nothing change.

digitalocean/config.go

@@ -6,6 +6,7 @@ import (
 	"log"
 	"net/http"
 	"net/http/httputil"
+	"net/url"
 	"strings"
 	"time"
 
@@ -20,9 +21,10 @@ import (
 )
 
 type Config struct {
-	Token     string
-	AccessID  string
-	SecretKey string
+	Token       string
+	APIEndpoint string
+	AccessID    string
+	SecretKey   string
 }
 
 type CombinedConfig struct {
@@ -65,6 +67,12 @@ func (c *Config) Client() (*CombinedConfig, error) {
 		return nil, err
 	}
 
+	apiURL, err := url.Parse(c.APIEndpoint)
+	if err != nil {
+		return nil, err
+	}
+	client.BaseURL = apiURL
+
 	if logging.IsDebugOrHigher() {
 		do.OnRequestCompleted(logRequestAndResponse)
 	}

digitalocean/provider.go

@@ -15,6 +15,12 @@ func Provider() terraform.ResourceProvider {
 				DefaultFunc: schema.EnvDefaultFunc("DIGITALOCEAN_TOKEN", nil),
 				Description: "The token key for API operations.",
 			},
+			"api_endpoint": {
+				Type:        schema.TypeString,
+				Required:    true,
+				DefaultFunc: schema.EnvDefaultFunc("DIGITALOCEAN_API_URL", "https://api.digitalocean.com"),
+				Description: "The URL to use for the DigitalOcean API.",
+			},
 			"spaces_access_id": {
 				Type:        schema.TypeString,
 				Optional:    true,
@@ -71,9 +77,10 @@ func Provider() terraform.ResourceProvider {
 
 func providerConfigure(d *schema.ResourceData) (interface{}, error) {
 	config := Config{
-		Token:     d.Get("token").(string),
-		AccessID:  d.Get("spaces_access_id").(string),
-		SecretKey: d.Get("spaces_secret_key").(string),
+		Token:       d.Get("token").(string),
+		APIEndpoint: d.Get("api_endpoint").(string),
+		AccessID:    d.Get("spaces_access_id").(string),
+		SecretKey:   d.Get("spaces_secret_key").(string),
 	}
 
 	return config.Client()