Return an entire options struct

pkg/minikube/machine/cache_binaries.go

@@ -57,19 +57,26 @@ func releaseURL(binaryName, version, osName, archName string) string {
 	return fmt.Sprintf("https://storage.googleapis.com/kubernetes-release/release/%s/bin/%s/%s/%s", version, osName, archName, binaryName)
 }
 
-// checksumVerifier returns the binary checksum URL and hash method
-func checksumVerifier(binaryName, version, osName, archName string) (string, crypto.Hash, error) {
-	binURL := releaseURL(binaryName, version, osName, archName)
+// downloadOptions returns appropriate download options for a
+func downloadOptions(url string, version string) (download.FileOptions, error) {
+	fo := download.FileOptions{
+		Mkdirs: download.MkdirAll,
+		Options: download.Options{
+			ChecksumHash: crypto.SHA1,
+			Checksum:     url + ".sha1",
+		},
+	}
 
 	v, err := semver.Make(version[1:])
 	if err != nil {
-		return "", 0, err
+		return fo, err
 	}
 
 	if v.GTE(semver.MustParse("1.17.0")) {
-		return binURL + ".sha256", crypto.SHA256, nil
+		fo.ChecksumHash = crypto.SHA256
+		fo.Checksum = url + ".sha256"
 	}
-	return binURL + ".sha1", crypto.SHA1, nil
+	return fo, nil
 }
 
 // CacheBinary will cache a binary on the host
@@ -94,17 +101,10 @@ func CacheBinary(binary, version, osName, archName string) (string, error) {
 		return "", errors.Wrapf(err, "mkdir %s", targetDir)
 	}
 
-	options := download.FileOptions{
-		Mkdirs: download.MkdirAll,
-	}
-
-	ckURL, ckAlgo, err := checksumVerifier(binary, version, osName, archName)
+	options, err := downloadOptions(url, version)
 	if err != nil {
-		return "", errors.Wrap(err, "verifier")
+		return "", errors.Wrap(err, "options")
 	}
-	options.Checksum = ckURL
-	options.ChecksumHash = ckAlgo
-
 	glog.Infof("Downloading %s: options: %+v", url, options)
 
 	out.T(out.FileDownload, "Downloading {{.name}} {{.version}}", out.V{"name": binary, "version": version})

pkg/minikube/machine/cache_binaries_test.go

@@ -17,12 +17,15 @@ limitations under the License.
 package machine
 
 import (
+	"crypto"
 	"fmt"
 	"io/ioutil"
 	"os"
 	"runtime"
 	"testing"
 
+	"github.com/google/go-cmp/cmp"
+	"github.com/jimmidyson/go-download"
 	"k8s.io/minikube/pkg/minikube/assets"
 	"k8s.io/minikube/pkg/minikube/bootstrapper"
 	"k8s.io/minikube/pkg/minikube/command"
@@ -215,3 +218,57 @@ func TestCacheBinary(t *testing.T) {
 		})
 	}
 }
+
+func TestDownloadOptions(t *testing.T) {
+	var tc = []struct {
+		url     string
+		version string
+		want    download.FileOptions
+	}{
+		{
+			url:     "https://s/kubernetes-release/release/v1.16.0/bin/amd64/kubectl",
+			version: "v1.16.0",
+			want: download.FileOptions{
+				download.Options{
+					Checksum:     "https://s/kubernetes-release/release/v1.16.0/bin/amd64/kubectl.sha1",
+					ChecksumHash: crypto.SHA1,
+				},
+				download.MkdirAll,
+			},
+		},
+		{
+			url:     "https://s/kubernetes-release/release/v1.10.0/bin/hp9k/kubeadm",
+			version: "v1.10.0",
+			want: download.FileOptions{
+				download.Options{
+					Checksum:     "https://s/kubernetes-release/release/v1.10.0/bin/hp9k/kubeadm.sha1",
+					ChecksumHash: crypto.SHA1,
+				},
+				download.MkdirAll,
+			},
+		},
+		{
+			url:     "https://s/kubernetes-release/release/v1.18.0/bin/arm64/kubelet",
+			version: "v1.18.0",
+			want: download.FileOptions{
+				download.Options{
+					Checksum:     "https://s/kubernetes-release/release/v1.18.0/bin/arm64/kubelet.sha256",
+					ChecksumHash: crypto.SHA256,
+				},
+				download.MkdirAll,
+			},
+		},
+	}
+	for _, test := range tc {
+		t.Run(test.version, func(t *testing.T) {
+			got, err := downloadOptions(test.url, test.version)
+			if err != nil {
+				t.Fatalf("unexpected error %v", err)
+			}
+
+			if diff := cmp.Diff(test.want, got); diff != "" {
+				t.Errorf("unexpected options(-want +got):\n%s", diff)
+			}
+		})
+	}
+}