Vendor all dependencies w/ Godep

* Remove `make updatedeps` from Travis build. We'll follow up with more
   specific plans around dependency updating in subsequent PRs.
 * Update all `make` targets to set `GO15VENDOREXPERIMENT=1` and to
   filter out `/vendor/` from `./...` where appropriate.
 * Temporarily remove `vet` from the `make test` target until we can
   figure out how to get it to not vet `vendor/`. (Initial
   experimentation failed to yield the proper incantation.)

Everything is pinned to current master, with the exception of:

 * Azure/azure-sdk-for-go which is pinned before the breaking change today
 * aws/aws-sdk-go which is pinned to the most recent tag

The documentation still needs to be updated, which we can do in a follow
up PR. The goal here is to unblock release.

vendor/github.com/rackspace/gophercloud/openstack/utils/choose_version.go

@@ -0,0 +1,114 @@
+package utils
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/rackspace/gophercloud"
+)
+
+// Version is a supported API version, corresponding to a vN package within the appropriate service.
+type Version struct {
+	ID       string
+	Suffix   string
+	Priority int
+}
+
+var goodStatus = map[string]bool{
+	"current":   true,
+	"supported": true,
+	"stable":    true,
+}
+
+// ChooseVersion queries the base endpoint of an API to choose the most recent non-experimental alternative from a service's
+// published versions.
+// It returns the highest-Priority Version among the alternatives that are provided, as well as its corresponding endpoint.
+func ChooseVersion(client *gophercloud.ProviderClient, recognized []*Version) (*Version, string, error) {
+	type linkResp struct {
+		Href string `json:"href"`
+		Rel  string `json:"rel"`
+	}
+
+	type valueResp struct {
+		ID     string     `json:"id"`
+		Status string     `json:"status"`
+		Links  []linkResp `json:"links"`
+	}
+
+	type versionsResp struct {
+		Values []valueResp `json:"values"`
+	}
+
+	type response struct {
+		Versions versionsResp `json:"versions"`
+	}
+
+	normalize := func(endpoint string) string {
+		if !strings.HasSuffix(endpoint, "/") {
+			return endpoint + "/"
+		}
+		return endpoint
+	}
+	identityEndpoint := normalize(client.IdentityEndpoint)
+
+	// If a full endpoint is specified, check version suffixes for a match first.
+	for _, v := range recognized {
+		if strings.HasSuffix(identityEndpoint, v.Suffix) {
+			return v, identityEndpoint, nil
+		}
+	}
+
+	var resp response
+	_, err := client.Request("GET", client.IdentityBase, gophercloud.RequestOpts{
+		JSONResponse: &resp,
+		OkCodes:      []int{200, 300},
+	})
+
+	if err != nil {
+		return nil, "", err
+	}
+
+	byID := make(map[string]*Version)
+	for _, version := range recognized {
+		byID[version.ID] = version
+	}
+
+	var highest *Version
+	var endpoint string
+
+	for _, value := range resp.Versions.Values {
+		href := ""
+		for _, link := range value.Links {
+			if link.Rel == "self" {
+				href = normalize(link.Href)
+			}
+		}
+
+		if matching, ok := byID[value.ID]; ok {
+			// Prefer a version that exactly matches the provided endpoint.
+			if href == identityEndpoint {
+				if href == "" {
+					return nil, "", fmt.Errorf("Endpoint missing in version %s response from %s", value.ID, client.IdentityBase)
+				}
+				return matching, href, nil
+			}
+
+			// Otherwise, find the highest-priority version with a whitelisted status.
+			if goodStatus[strings.ToLower(value.Status)] {
+				if highest == nil || matching.Priority > highest.Priority {
+					highest = matching
+					endpoint = href
+				}
+			}
+		}
+	}
+
+	if highest == nil {
+		return nil, "", fmt.Errorf("No supported version available from endpoint %s", client.IdentityBase)
+	}
+	if endpoint == "" {
+		return nil, "", fmt.Errorf("Endpoint missing in version %s response from %s", highest.ID, client.IdentityBase)
+	}
+
+	return highest, endpoint, nil
+}

vendor/github.com/rackspace/gophercloud/openstack/utils/choose_version_test.go

@@ -0,0 +1,118 @@
+package utils
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/rackspace/gophercloud"
+	"github.com/rackspace/gophercloud/testhelper"
+)
+
+func setupVersionHandler() {
+	testhelper.Mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprintf(w, `
+			{
+				"versions": {
+					"values": [
+						{
+							"status": "stable",
+							"id": "v3.0",
+							"links": [
+								{ "href": "%s/v3.0", "rel": "self" }
+							]
+						},
+						{
+							"status": "stable",
+							"id": "v2.0",
+							"links": [
+								{ "href": "%s/v2.0", "rel": "self" }
+							]
+						}
+					]
+				}
+			}
+		`, testhelper.Server.URL, testhelper.Server.URL)
+	})
+}
+
+func TestChooseVersion(t *testing.T) {
+	testhelper.SetupHTTP()
+	defer testhelper.TeardownHTTP()
+	setupVersionHandler()
+
+	v2 := &Version{ID: "v2.0", Priority: 2, Suffix: "blarg"}
+	v3 := &Version{ID: "v3.0", Priority: 3, Suffix: "hargl"}
+
+	c := &gophercloud.ProviderClient{
+		IdentityBase:     testhelper.Endpoint(),
+		IdentityEndpoint: "",
+	}
+	v, endpoint, err := ChooseVersion(c, []*Version{v2, v3})
+
+	if err != nil {
+		t.Fatalf("Unexpected error from ChooseVersion: %v", err)
+	}
+
+	if v != v3 {
+		t.Errorf("Expected %#v to win, but %#v did instead", v3, v)
+	}
+
+	expected := testhelper.Endpoint() + "v3.0/"
+	if endpoint != expected {
+		t.Errorf("Expected endpoint [%s], but was [%s] instead", expected, endpoint)
+	}
+}
+
+func TestChooseVersionOpinionatedLink(t *testing.T) {
+	testhelper.SetupHTTP()
+	defer testhelper.TeardownHTTP()
+	setupVersionHandler()
+
+	v2 := &Version{ID: "v2.0", Priority: 2, Suffix: "nope"}
+	v3 := &Version{ID: "v3.0", Priority: 3, Suffix: "northis"}
+
+	c := &gophercloud.ProviderClient{
+		IdentityBase:     testhelper.Endpoint(),
+		IdentityEndpoint: testhelper.Endpoint() + "v2.0/",
+	}
+	v, endpoint, err := ChooseVersion(c, []*Version{v2, v3})
+	if err != nil {
+		t.Fatalf("Unexpected error from ChooseVersion: %v", err)
+	}
+
+	if v != v2 {
+		t.Errorf("Expected %#v to win, but %#v did instead", v2, v)
+	}
+
+	expected := testhelper.Endpoint() + "v2.0/"
+	if endpoint != expected {
+		t.Errorf("Expected endpoint [%s], but was [%s] instead", expected, endpoint)
+	}
+}
+
+func TestChooseVersionFromSuffix(t *testing.T) {
+	testhelper.SetupHTTP()
+	defer testhelper.TeardownHTTP()
+
+	v2 := &Version{ID: "v2.0", Priority: 2, Suffix: "/v2.0/"}
+	v3 := &Version{ID: "v3.0", Priority: 3, Suffix: "/v3.0/"}
+
+	c := &gophercloud.ProviderClient{
+		IdentityBase:     testhelper.Endpoint(),
+		IdentityEndpoint: testhelper.Endpoint() + "v2.0/",
+	}
+	v, endpoint, err := ChooseVersion(c, []*Version{v2, v3})
+	if err != nil {
+		t.Fatalf("Unexpected error from ChooseVersion: %v", err)
+	}
+
+	if v != v2 {
+		t.Errorf("Expected %#v to win, but %#v did instead", v2, v)
+	}
+
+	expected := testhelper.Endpoint() + "v2.0/"
+	if endpoint != expected {
+		t.Errorf("Expected endpoint [%s], but was [%s] instead", expected, endpoint)
+	}
+}