feat/provider: read .scwrc

scaleway/provider.go

@@ -1,10 +1,15 @@
 package scaleway
 
 import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
 	"sync"
 
 	"github.com/hashicorp/terraform/helper/schema"
 	"github.com/hashicorp/terraform/terraform"
+	homedir "github.com/mitchellh/go-homedir"
 )
 
 var mu = sync.Mutex{}
@@ -23,16 +28,41 @@ func Provider() terraform.ResourceProvider {
 			"token": {
 				Type:     schema.TypeString,
 				Required: true,
-				DefaultFunc: schema.MultiEnvDefaultFunc([]string{
-					"SCALEWAY_TOKEN",
-					"SCALEWAY_ACCESS_KEY",
-				}, nil),
+				DefaultFunc: schema.SchemaDefaultFunc(func() (interface{}, error) {
+					for _, k := range []string{"SCALEWAY_TOKEN", "SCALEWAY_ACCESS_KEY"} {
+						if os.Getenv(k) != "" {
+							return k, nil
+						}
+					}
+					if path, err := homedir.Expand("~/.scwrc"); err == nil {
+						scwAPIKey, _, err := readScalewayConfig(path)
+						if err != nil {
+							return nil, err
+						}
+						return scwAPIKey, nil
+					}
+					return nil, errors.New("No token found")
+				}),
 				Description: "The API key for Scaleway API operations.",
 			},
 			"organization": {
-				Type:        schema.TypeString,
-				Required:    true,
-				DefaultFunc: schema.EnvDefaultFunc("SCALEWAY_ORGANIZATION", nil),
+				Type:     schema.TypeString,
+				Required: true,
+				DefaultFunc: schema.SchemaDefaultFunc(func() (interface{}, error) {
+					for _, k := range []string{"SCALEWAY_ORGANIZATION"} {
+						if os.Getenv(k) != "" {
+							return k, nil
+						}
+					}
+					if path, err := homedir.Expand("~/.scwrc"); err == nil {
+						_, scwOrganization, err := readScalewayConfig(path)
+						if err != nil {
+							return nil, err
+						}
+						return scwOrganization, nil
+					}
+					return nil, errors.New("No token found")
+				}),
 				Description: "The Organization ID (a.k.a. 'access key') for Scaleway API operations.",
 			},
 			"region": {
@@ -68,6 +98,26 @@ func Provider() terraform.ResourceProvider {
 	}
 }
 
+type scalewayConfig struct {
+	Organization string `json:"organization"`
+	Token        string `json:"token"`
+	Version      string `json:"version"`
+}
+
+func readScalewayConfig(path string) (string, string, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return "", "", err
+	}
+	defer f.Close()
+
+	var data scalewayConfig
+	if err := json.NewDecoder(f).Decode(&data); err != nil {
+		return "", "", err
+	}
+	return data.Token, data.Organization, nil
+}
+
 func providerConfigure(d *schema.ResourceData) (interface{}, error) {
 	apiKey := ""
 	if v, ok := d.Get("token").(string); ok {
@@ -78,8 +128,21 @@ func providerConfigure(d *schema.ResourceData) (interface{}, error) {
 		}
 	}
 
+	organization := d.Get("organization").(string)
+
+	if apiKey == "" {
+		if path, err := homedir.Expand("~/.scwrc"); err == nil {
+			scwAPIKey, scwOrganization, err := readScalewayConfig(path)
+			if err != nil {
+				return nil, fmt.Errorf("Error loading credentials from SCW: %s", err)
+			}
+			apiKey = scwAPIKey
+			organization = scwOrganization
+		}
+	}
+
 	config := Config{
-		Organization: d.Get("organization").(string),
+		Organization: organization,
 		APIKey:       apiKey,
 		Region:       d.Get("region").(string),
 	}

scaleway/provider_test.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/hashicorp/terraform/helper/schema"
 	"github.com/hashicorp/terraform/terraform"
+	homedir "github.com/mitchellh/go-homedir"
 )
 
 var testAccProviders map[string]terraform.ResourceProvider
@@ -30,6 +31,16 @@ func TestProvider_impl(t *testing.T) {
 
 func testAccPreCheck(t *testing.T) {
 	if v := os.Getenv("SCALEWAY_ORGANIZATION"); v == "" {
+		if path, err := homedir.Expand("~/.scwrc"); err == nil {
+			scwAPIKey, scwOrganization, err := readScalewayConfig(path)
+			if err != nil {
+				t.Fatalf("failed falling back to %s: %v", path, err)
+			}
+			if scwAPIKey == "" && scwOrganization == "" {
+				t.Fatal("SCALEWAY_TOKEN must be set for acceptance tests")
+			}
+			return
+		}
 		t.Fatal("SCALEWAY_ORGANIZATION must be set for acceptance tests")
 	}
 	tokenFromAccessKey := os.Getenv("SCALEWAY_ACCESS_KEY")

website/docs/index.html.markdown

@@ -107,6 +107,8 @@ provider "scaleway" {
 - **SCALEWAY_TOKEN**: Your API access `token`, generated by you
 - **SCALEWAY_REGION**: The Scaleway region
 
+Alternatively the `~/.scwrc` will be parsed to load your Scaleway CLI configuration, if it exists.
+
 ## Volume usage
 
 You can add volumes to bare metal instances.