Add new `registry update` command.

Part of #237.
Signed-off-by: Oren Shomron <shomron@gmail.com>

.dockerignore

@@ -5,3 +5,4 @@ dist
 */debug
 ks
 ks.exe
+tags

.gitignore

@@ -28,3 +28,6 @@ _testmain.go
 *.exe
 *.test
 *.prof
+
+# gotags
+tags

pkg/actions/registry_list.go

@@ -60,7 +60,7 @@ func NewRegistryList(m map[string]interface{}) (*RegistryList, error) {
 	return rl, nil
 }
 
-// Run runs the env list action.
+// Run runs the registry list action.
 func (rl *RegistryList) Run() error {
 	registries, err := rl.registryListFn(rl.app)
 	if err != nil {

pkg/actions/registry_update.go

+// Copyright 2018 The ksonnet authors
+//
+//
+//    Licensed under the Apache License, Version 2.0 (the "License");
+//    you may not use this file except in compliance with the License.
+//    You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS,
+//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//    See the License for the specific language governing permissions and
+//    limitations under the License.
+
+package actions
+
+import (
+	"io"
+	"os"
+
+	"github.com/ksonnet/ksonnet/pkg/app"
+	"github.com/ksonnet/ksonnet/pkg/registry"
+	"github.com/pkg/errors"
+	log "github.com/sirupsen/logrus"
+)
+
+// RunRegistryUpdate runs `env list`
+func RunRegistryUpdate(m map[string]interface{}) error {
+	ru, err := NewRegistryUpdate(m)
+	if err != nil {
+		return err
+	}
+
+	ol := newOptionLoader(m)
+	name := ol.LoadString(OptionName)
+	version := ol.LoadString(OptionVersion)
+
+	if ol.err != nil {
+		return ol.err
+	}
+
+	return ru.run(name, version)
+}
+
+type LocateFn func(app.App, *app.RegistryRefSpec) (registry.Updater, error)
+
+// RegistryUpdate lists available registries
+type RegistryUpdate struct {
+	app      app.App
+	listFn   func(ksApp app.App) ([]registry.Registry, error)
+	locateFn LocateFn
+	out      io.Writer
+}
+
+// NewRegistryUpdate creates an instance of RegistryUpdate
+func NewRegistryUpdate(m map[string]interface{}) (*RegistryUpdate, error) {
+	ol := newOptionLoader(m)
+
+	ru := &RegistryUpdate{
+		app: ol.LoadApp(),
+
+		listFn:   registry.List,
+		locateFn: defaultLocate,
+		out:      os.Stdout,
+	}
+
+	if ol.err != nil {
+		return nil, ol.err
+	}
+
+	return ru, nil
+}
+
+// defaultLocate passes-through to registry.Locate, but constrains the interface
+// to just `registry.Updater`. The concrete type of registry.Updater is determined
+// by the `spec` argument.
+func defaultLocate(ksApp app.App, spec *app.RegistryRefSpec) (registry.Updater, error) {
+	return registry.Locate(ksApp, spec)
+}
+
+// resolveUpdateSet returns a list of registries (by name) to update, based on user input.
+// If a name was given, that registry will be the sole member of the updateSet.
+// Otherwise, a list of all currently configured registries will be returned.
+func (ru *RegistryUpdate) resolveUpdateSet(name string) ([]string, error) {
+	if ru == nil {
+		return nil, errors.Errorf("nil receiver")
+	}
+
+	// Empty registry name == all
+	updateSet := make([]string, 0)
+
+	specs, err := ru.app.Registries()
+	if err != nil {
+		return nil, errors.Wrap(err, "error retrieving configured registries")
+	}
+
+	switch name {
+	case "":
+		// The user asked to update all registries
+		for regName := range specs {
+			updateSet = append(updateSet, regName)
+		}
+
+	default:
+		// The user asked to update a specific registry -
+		// ensure it is valid.
+		if _, ok := specs[name]; !ok {
+			return nil, errors.Errorf("`unknown` registry: %v", name)
+		}
+
+		updateSet = append(updateSet, name)
+	}
+	return updateSet, nil
+}
+
+// verifyRegistryExists verifies that a registry of a given name is
+// configured in the current application.
+func (ru *RegistryUpdate) verifyRegistryExists(name string) (bool, error) {
+	if ru == nil {
+		return false, errors.Errorf("nil receiver")
+	}
+
+	if name == "" {
+		return false, errors.Errorf("registry name required")
+	}
+
+	if ru.app == nil {
+		return false, errors.Errorf("missing application")
+	}
+
+	// NOTE: app.Registries() does not currently cache app configuration
+	specs, err := ru.app.Registries()
+	if err != nil {
+		return false, errors.Wrap(err, "error retrieving configured registries")
+	}
+
+	_, ok := specs[name]
+	return ok, nil
+}
+
+// run runs the registry update command.
+// Both name and version are optional.
+// Empty name means all registries rather than a specific one.
+// Empty version means try to use the latest version matching the registry's spec.
+func (ru *RegistryUpdate) run(name string, version string) error {
+	if ru == nil {
+		return errors.Errorf("nil receiver")
+	}
+
+	// Figure our which registries to update.
+	updateSet, err := ru.resolveUpdateSet(name)
+	if err != nil {
+		return errors.Wrap(err, "failed to resolve registry update set")
+	}
+
+	if len(updateSet) < 1 {
+		return errors.Errorf("no registries to update")
+	}
+
+	log.Debugf("Updating registries: %v\n", updateSet)
+	return doUpdate(ru.app, ru.locateFn, updateSet, version)
+}
+
+// doUpdate updates the provided registries. The optional version will be used if provided.
+// Otherwise, latest versions matching the current registry specs will be used.
+func doUpdate(app app.App, locateFn LocateFn, updateSet []string, version string) error {
+	if app == nil {
+		return errors.Errorf("missing application")
+	}
+
+	if locateFn == nil {
+		return errors.Errorf("missing registry locator function")
+	}
+
+	if len(updateSet) == 0 {
+		return errors.Errorf("nothing to update")
+	}
+
+	registries, err := app.Registries()
+	if err != nil {
+		return errors.Wrap(err, "failed to retrieve registries")
+	}
+
+	for _, name := range updateSet {
+		// Resolve the registry by name
+		rs, ok := registries[name]
+		if !ok {
+			return errors.Errorf("registry not found: %v", name)
+		}
+
+		log.Debugf("updating registry %v", name)
+		regUpdate, err := locateFn(app, rs)
+		if err != nil {
+			return errors.Wrapf(err, "could not locate registry by spec: %v", rs.Name)
+		}
+
+		_, err = doUpdateRegistry(app, regUpdate, rs, version)
+		if err != nil {
+			return errors.Wrapf(err, "error updating registry: %v", rs.Name)
+		}
+	}
+
+	return nil
+}
+
+// doUpdateRegisrty updates a single registry.
+// `app` maps registries by name. It will be updated with the new version if a change has occured.
+// `regUpdate` is an updatable registry. It will resolve the new version if `version` was not provided.
+// `rs` is a registry spec representing the current name and version of the registry, prior to update.
+// `version` is the optional desired version. When none is provided, the registry will attempt to resolve
+//           to the latest version matching the registry specifier.
+// Returns new version after update, and optional error.
+func doUpdateRegistry(a app.App, regUpdate registry.Updater, rs *app.RegistryRefSpec, version string) (string, error) {
+	if a == nil {
+		return "", errors.Errorf("missing application")
+	}
+
+	if rs == nil {
+		return "", errors.Errorf("nothing to update")
+	}
+
+	if version != "" {
+		return "", errors.Errorf("TODO not implemented")
+	}
+
+	newVersion, err := regUpdate.Update(version)
+	if err != nil {
+		return "", errors.Wrapf(err, "update failed for registry: %v", rs.Name)
+	}
+
+	// If changed, update app.yaml to point to new version
+	var oldVersion string
+	if rs.GitVersion != nil {
+		oldVersion = rs.GitVersion.CommitSHA
+	}
+
+	if oldVersion != newVersion {
+		log.Debugf("[update] registry %v version updated from '%v' to '%v'",
+			rs.Name, oldVersion, newVersion)
+
+		// Make a new registryRefSpec. Create GitVersion even if there was none previously.
+		newRS := *rs
+		var newGitVersion app.GitVersionSpec
+		if rs.GitVersion != nil {
+			newGitVersion = *(rs.GitVersion)
+		}
+		newGitVersion.CommitSHA = newVersion
+		newRS.GitVersion = &newGitVersion
+
+		if err := a.UpdateRegistry(&newRS); err != nil {
+			return "", errors.Wrapf(err, "error updating app registry pointer: %v", rs.Name)
+		}
+	} else {
+		log.Debugf("[update] registry %v version unchanged: %v", rs.Name, newVersion)
+		// TODO where does helm store its versions?
+	}
+
+	return newVersion, nil
+}

pkg/actions/registry_update_test.go

+// Copyright 2018 The ksonnet authors
+//
+//
+//    Licensed under the Apache License, Version 2.0 (the "License");
+//    you may not use this file except in compliance with the License.
+//    You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS,
+//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//    See the License for the specific language governing permissions and
+//    limitations under the License.
+
+package actions
+
+import (
+	"sort"
+	"testing"
+
+	"github.com/ksonnet/ksonnet/pkg/app"
+	amocks "github.com/ksonnet/ksonnet/pkg/app/mocks"
+	"github.com/ksonnet/ksonnet/pkg/registry"
+	rmocks "github.com/ksonnet/ksonnet/pkg/registry/mocks"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
+)
+
+func TestRegistryUpdate_requires_app(t *testing.T) {
+	in := make(map[string]interface{})
+	_, err := NewRegistryUpdate(in)
+	require.Error(t, err)
+}
+
+// Generate spec->registry.Updater locators with customized mock registries
+func mockRegistryLocator(oldVersion string, newVersion string) LocateFn {
+	return func(app.App, *app.RegistryRefSpec) (registry.Updater, error) {
+		u := new(rmocks.Updater)
+		u.On("Update", oldVersion).Return(func(v string) (string, error) {
+			return newVersion, nil
+		})
+		return u, nil
+	}
+}
+
+func mockUpdater(oldVersion string, newVersion string) registry.Updater {
+	u := new(rmocks.Updater)
+	u.On("Update", oldVersion).Return(newVersion, nil)
+	return u
+}
+
+// Test that a set of registries to update can be resolved, one specific or all if unspecified.
+func TestRegistryUpdate_resolveUpdateSet(t *testing.T) {
+	a := new(amocks.App)
+	a.On("Registries").Return(
+		app.RegistryRefSpecs{
+			"custom":    nil,
+			"helm":      nil,
+			"incubator": nil,
+		},
+		nil,
+	)
+	ru := &RegistryUpdate{
+		app: a,
+	}
+
+	tests := []struct {
+		caseName  string
+		name      string
+		expected  []string
+		expectErr bool
+	}{
+		{
+			caseName:  "all registries",
+			name:      "",
+			expected:  []string{"custom", "helm", "incubator"},
+			expectErr: false,
+		},
+		{
+			caseName:  "specific registry",
+			name:      "incubator",
+			expected:  []string{"incubator"},
+			expectErr: false,
+		},
+		{
+			caseName:  "unknown registry",
+			name:      "unknown",
+			expected:  []string{},
+			expectErr: true,
+		},
+	}
+
+	for _, tc := range tests {
+		result, err := ru.resolveUpdateSet(tc.name)
+		if tc.expectErr {
+			require.Errorf(t, err, "test: %v", tc.name)
+		} else {
+			require.NoErrorf(t, err, "test: %v", tc.name)
+		}
+
+		// Don't make assertions about return value if error was returned
+		if err != nil {
+			continue
+		}
+
+		sort.Strings(result)
+		assert.Equal(t, tc.expected, result)
+	}
+}
+
+func TestRegistryUpdate_doUpdateRegistry(t *testing.T) {
+	// Helpers
+	makeApp := func(newVersion string) *amocks.App {
+		a := new(amocks.App)
+		a.On("UpdateRegistry",
+			mock.MatchedBy(func(spec *app.RegistryRefSpec) bool {
+				if spec == nil {
+					t.Errorf("spec is nil")
+					return false
+				}
+				if spec.GitVersion == nil {
+					t.Errorf("spec.GitVersion is nil")
+					return false
+				}
+				if spec.GitVersion.CommitSHA != newVersion {
+					t.Errorf("unexpected version argument: expected %v, got %v", newVersion, spec.GitVersion.CommitSHA)
+					return false
+				}
+				return true
+			}),
+		).Return(nil).Once()
+		return a
+	}
+
+	makeSpec := func(version string) *app.RegistryRefSpec {
+		return &app.RegistryRefSpec{
+			GitVersion: &app.GitVersionSpec{
+				CommitSHA: version,
+			},
+		}
+	}
+
+	tests := []struct {
+		name             string
+		app              *amocks.App
+		updater          registry.Updater
+		rs               *app.RegistryRefSpec
+		requestedVersion string
+		expected         string
+		shouldUpdate     bool
+		expectErr        bool
+	}{
+		{
+			name:             "normal update",
+			app:              makeApp("newVersion"),
+			updater:          mockUpdater("", "newVersion"),
+			rs:               makeSpec("currentVersion"),
+			requestedVersion: "",
+			expected:         "newVersion",
+			shouldUpdate:     true,
+			expectErr:        false,
+		},
+		{
+			name:             "no change, shouldn't update",
+			app:              makeApp("XXXX"),
+			updater:          mockUpdater("", "currentVersion"),
+			rs:               makeSpec("currentVersion"),
+			requestedVersion: "",
+			expected:         "currentVersion",
+			shouldUpdate:     false,
+			expectErr:        false,
+		},
+		{
+			name:             "doesn't support targeted version yet",
+			app:              makeApp("newVersion"),
+			updater:          mockUpdater("", "newVersion"),
+			rs:               makeSpec("currentVersion"),
+			requestedVersion: "someVersion",
+			expected:         "someVersion",
+			shouldUpdate:     false,
+			expectErr:        true,
+		},
+		// {
+		// 	name:             "nil app returns error",
+		// 	app:              nil,
+		// 	updater:          mockUpdater("", "newVersion"),
+		// 	rs:               makeSpec("currentVersion"),
+		// 	requestedVersion: "",
+		// 	expected:         "",
+		// 	shouldUpdate:     false,
+		// 	expectErr:        true,
+		// },
+		{
+			name:             "no registrySpec returns error",
+			app:              makeApp("newVersion"),
+			updater:          mockUpdater("", "newVersion"),
+			rs:               nil,
+			requestedVersion: "",
+			expected:         "",
+			shouldUpdate:     false,
+			expectErr:        true,
+		},
+		{
+			name:             "missing rs.GitVersion still updates app",
+			app:              makeApp("newVersion"),
+			updater:          mockUpdater("", "newVersion"),
+			rs:               &app.RegistryRefSpec{},
+			requestedVersion: "",
+			expected:         "newVersion",
+			shouldUpdate:     true,
+			expectErr:        false,
+		},
+	}
+
+	for _, tc := range tests {
+		result, err := doUpdateRegistry(tc.app, tc.updater, tc.rs, tc.requestedVersion)
+		if tc.expectErr {
+			require.Errorf(t, err, "test: %v", tc.name)
+		} else {
+			require.NoErrorf(t, err, "test: %v", tc.name)
+		}
+
+		// Don't make assertions about return value if error was returned
+		if err != nil {
+			continue
+		}
+
+		assert.Equal(t, tc.expected, result)
+
+		// Assert app.UpdateRegistry gets called with the new, updated version,
+		// when there is a newer version found.
+		if tc.shouldUpdate {
+			newRS := makeSpec(tc.expected)
+			tc.app.AssertCalled(t, "UpdateRegistry", newRS)
+		} else {
+			tc.app.AssertNumberOfCalls(t, "UpdateRegistry", 0)
+		}
+	}
+}
+
+// func TestRegistryUpdate_doUpdate(t *testing.T) {
+// 	a := new(amocks.App)
+// 	spec := &app.RegistryRefSpec{
+// 		GitVersion: &app.GitVersionSpec{
+// 			CommitSHA: "oldversion"
+// 		}
+// 	}
+// 	a.On("Registries").Return(
+// 		app.RegistryRefSpecs{
+// 			"incubator": spec,
+// 		},
+// 		nil,
+// 	)
+// 	ru := &RegistryUpdate{
+// 		app:      a,
+// 		locateFn: mockRegistryLocator("oldversion", "newversion"),
+// 	}
+
+// }

pkg/app/app.go

@@ -89,6 +89,8 @@ type App interface {
 	UpdateTargets(envName string, targets []string) error
 	// UpdateLib updates a library.
 	UpdateLib(name string, spec *LibraryRefSpec) error
+	// UpdateRegistry updates a registry.
+	UpdateRegistry(spec *RegistryRefSpec) error
 	// Upgrade upgrades an application to the current version.
 	Upgrade(dryRun bool) error
 }

pkg/app/base_app.go

@@ -202,6 +202,42 @@ func (ba *baseApp) UpdateLib(name string, libSpec *LibraryRefSpec) error {
 	return ba.save()
 }
 
+// UpdateRegistry updates a registry spec and persists in app[.override].yaml
+func (ba *baseApp) UpdateRegistry(spec *RegistryRefSpec) error {
+	if err := ba.load(); err != nil {
+		return errors.Wrap(err, "load configuration")
+	}
+
+	if spec.Name == "" {
+		return ErrRegistryNameInvalid
+	}
+
+	// Figure out where the registry is defined (app or override)
+	var ok, okOverride bool
+	if ba.config != nil {
+		_, ok = ba.config.Registries[spec.Name]
+	}
+	if ba.overrides != nil {
+		_, okOverride = ba.overrides.Registries[spec.Name]
+	}
+
+	if !ok && !okOverride {
+		return errors.Errorf("registry not found: %v", spec.Name)
+	}
+
+	if ok && okOverride {
+		return errors.Errorf("registry %v found in both app.yaml and app.override.yaml", spec.Name)
+	}
+
+	if ok {
+		ba.config.Registries[spec.Name] = spec
+	} else {
+		ba.overrides.Registries[spec.Name] = spec
+	}
+
+	return ba.save()
+}
+
 func (ba *baseApp) Fs() afero.Fs {
 	return ba.fs
 }

pkg/app/base_app_test.go

@@ -122,6 +122,62 @@ func Test_baseApp_AddRegistry_override_existing(t *testing.T) {
 	require.NoError(t, err)
 }
 
+func Test_baseApp_UpdateRegistry(t *testing.T) {
+	tests := []struct {
+		name           string
+		regSpec        RegistryRefSpec
+		appFilePath    string