feat: Automatic inferring of registry from image prefix

Makefile

@@ -62,6 +62,9 @@ mod-vendor:
 test:
 	go test -coverprofile coverage.out `go list ./... | egrep -v '(test|mocks|ext/)'`
 
+test-race:
+	go test -race -coverprofile coverage.out `go list ./... | egrep -v '(test|mocks|ext/)'`
+
 .PHONY: prereq
 prereq:
 	mkdir -p dist

pkg/argocd/update_test.go

@@ -839,11 +839,11 @@ func Test_UpdateApplication(t *testing.T) {
 		assert.Equal(t, 0, res.NumImagesUpdated)
 	})
 
-	t.Run("Error - unknown registry", func(t *testing.T) {
+	t.Run("Update from infered registry", func(t *testing.T) {
 		mockClientFn := func(endpoint *registry.RegistryEndpoint, username, password string) (registry.RegistryClient, error) {
 			regMock := regmock.RegistryClient{}
 			regMock.On("NewRepository", mock.Anything).Return(nil)
-			regMock.On("Tags", mock.Anything).Return([]string{"1.0.1"}, nil)
+			regMock.On("Tags", mock.Anything).Return([]string{"1.0.1", "1.0.2"}, nil)
 			return &regMock, nil
 		}
 
@@ -863,7 +863,7 @@ func Test_UpdateApplication(t *testing.T) {
 					Source: v1alpha1.ApplicationSource{
 						Kustomize: &v1alpha1.ApplicationSourceKustomize{
 							Images: v1alpha1.KustomizeImages{
-								"example.io/jannfis/foobar:1.0.1",
+								"example.io/jannfis/example:1.0.1",
 							},
 						},
 					},
@@ -872,13 +872,13 @@ func Test_UpdateApplication(t *testing.T) {
 					SourceType: v1alpha1.ApplicationSourceTypeKustomize,
 					Summary: v1alpha1.ApplicationSummary{
 						Images: []string{
-							"example.io/jannfis/foobar:1.0.1",
+							"example.io/jannfis/example:1.0.1",
 						},
 					},
 				},
 			},
 			Images: image.ContainerImageList{
-				image.NewFromIdentifier("example.io/jannfis/foobar:1.0.1"),
+				image.NewFromIdentifier("example.io/jannfis/example:1.0.x"),
 			},
 		}
 		res := UpdateApplication(&UpdateConfiguration{
@@ -888,11 +888,11 @@ func Test_UpdateApplication(t *testing.T) {
 			UpdateApp:  appImages,
 			DryRun:     false,
 		}, NewSyncIterationState())
-		assert.Equal(t, 1, res.NumErrors)
+		assert.Equal(t, 0, res.NumErrors)
 		assert.Equal(t, 0, res.NumSkipped)
 		assert.Equal(t, 1, res.NumApplicationsProcessed)
 		assert.Equal(t, 1, res.NumImagesConsidered)
-		assert.Equal(t, 0, res.NumImagesUpdated)
+		assert.Equal(t, 1, res.NumImagesUpdated)
 	})
 
 	t.Run("Test error on generic registry client failure", func(t *testing.T) {

pkg/registry/config.go

@@ -23,13 +23,20 @@ type RegistryConfiguration struct {
 	Insecure    bool          `yaml:"insecure,omitempty"`
 	DefaultNS   string        `yaml:"defaultns,omitempty"`
 	Limit       int           `yaml:"limit,omitempty"`
+	IsDefault   bool          `yaml:"default,omitempty"`
 }
 
 // RegistryList contains multiple RegistryConfiguration items
 type RegistryList struct {
 	Items []RegistryConfiguration `yaml:"registries"`
 }
 
+func clearRegistries() {
+	registryLock.Lock()
+	registries = make(map[string]*RegistryEndpoint)
+	registryLock.Unlock()
+}
+
 // LoadRegistryConfiguration loads a YAML-formatted registry configuration from
 // a given file at path.
 func LoadRegistryConfiguration(path string, clear bool) error {
@@ -43,20 +50,35 @@ func LoadRegistryConfiguration(path string, clear bool) error {
 	}
 
 	if clear {
-		registryLock.Lock()
-		registries = make(map[string]*RegistryEndpoint)
-		registryLock.Unlock()
+		clearRegistries()
 	}
 
+	haveDefault := false
+
 	for _, reg := range registryList.Items {
 		tagSortMode := TagListSortFromString(reg.TagSortMode)
 		if tagSortMode != TagListSortUnsorted {
 			log.Warnf("Registry %s has tag sort mode set to %s, meta data retrieval will be disabled for this registry.", reg.ApiURL, tagSortMode)
 		}
-		err = AddRegistryEndpoint(reg.Prefix, reg.Name, reg.ApiURL, reg.Credentials, reg.DefaultNS, reg.Insecure, tagSortMode, reg.Limit, reg.CredsExpire)
-		if err != nil {
+		ep := NewRegistryEndpoint(reg.Prefix, reg.Name, reg.ApiURL, reg.Credentials, reg.DefaultNS, reg.Insecure, tagSortMode, reg.Limit, reg.CredsExpire)
+		if reg.IsDefault {
+			if haveDefault {
+				dep := GetDefaultRegistry()
+				if dep == nil {
+					panic("unexpected: default registry should be set, but is not")
+				}
+				return fmt.Errorf("cannot set registry %s as default - only one default registry allowed, currently set to %s", ep.RegistryPrefix, dep.RegistryPrefix)
+			}
+		}
+
+		if err := AddRegistryEndpoint(ep); err != nil {
 			return err
 		}
+
+		if reg.IsDefault {
+			SetDefaultRegistry(ep)
+			haveDefault = true
+		}
 	}
 
 	log.Infof("Loaded %d registry configurations from %s", len(registryList.Items), path)
@@ -106,8 +128,12 @@ func ParseRegistryConfiguration(yamlSource string) (RegistryList, error) {
 func RestoreDefaultRegistryConfiguration() {
 	registryLock.Lock()
 	defer registryLock.Unlock()
+	defaultRegistry = nil
 	registries = make(map[string]*RegistryEndpoint)
-	for k, v := range defaultRegistries {
+	for k, v := range registryTweaks {
 		registries[k] = v.DeepCopy()
+		if v.IsDefault {
+			SetDefaultRegistry(registries[k])
+		}
 	}
 }

pkg/registry/config_test.go

@@ -75,10 +75,12 @@ registries:
 }
 
 func Test_LoadRegistryConfiguration(t *testing.T) {
+	RestoreDefaultRegistryConfiguration()
+
 	t.Run("Load from valid location", func(t *testing.T) {
-		err := LoadRegistryConfiguration("../../config/example-config.yaml", false)
+		err := LoadRegistryConfiguration("../../config/example-config.yaml", true)
 		require.NoError(t, err)
-		assert.Len(t, registries, 5)
+		assert.Len(t, registries, 4)
 		reg, err := GetRegistryEndpoint("gcr.io")
 		require.NoError(t, err)
 		assert.Equal(t, "pullsecret:foo/bar", reg.Credentials)
@@ -91,4 +93,18 @@ func Test_LoadRegistryConfiguration(t *testing.T) {
 		require.NoError(t, err)
 		assert.Equal(t, "", reg.Credentials)
 	})
+
+	t.Run("Load from invalid location", func(t *testing.T) {
+		err := LoadRegistryConfiguration("../../test/testdata/registry/config/does-not-exist.yaml", true)
+		require.Error(t, err)
+		require.Contains(t, err.Error(), "no such file or directory")
+	})
+
+	t.Run("Two defaults defined in same config", func(t *testing.T) {
+		err := LoadRegistryConfiguration("../../test/testdata/registry/config/two-defaults.yaml", true)
+		require.Error(t, err)
+		require.Contains(t, err.Error(), "cannot set registry")
+	})
+
+	RestoreDefaultRegistryConfiguration()
 }