fix: settings API should not fail if repo server is not available

assets/swagger.json

@@ -3588,6 +3588,29 @@
         }
       }
     },
+    "/api/v1/settings/plugins": {
+      "get": {
+        "tags": [
+          "SettingsService"
+        ],
+        "summary": "Get returns Argo CD plugins",
+        "operationId": "SettingsService_GetPlugins",
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "$ref": "#/definitions/clusterSettingsPluginsResponse"
+            }
+          },
+          "default": {
+            "description": "An unexpected error response.",
+            "schema": {
+              "$ref": "#/definitions/runtimeError"
+            }
+          }
+        }
+      }
+    },
     "/api/v1/stream/applications": {
       "get": {
         "tags": [
@@ -4342,6 +4365,17 @@
         }
       }
     },
+    "clusterSettingsPluginsResponse": {
+      "type": "object",
+      "properties": {
+        "plugins": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/clusterPlugin"
+          }
+        }
+      }
+    },
     "gpgkeyGnuPGPublicKeyCreateResponse": {
       "type": "object",
       "title": "Response to a public key creation request",

server/settings/settings.go

@@ -4,11 +4,11 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/argoproj/argo-cd/v2/reposerver/apiclient"
-	ioutil "github.com/argoproj/argo-cd/v2/util/io"
+	"github.com/ghodss/yaml"
 	"github.com/golang/protobuf/ptypes/empty"
 
-	"github.com/ghodss/yaml"
+	"github.com/argoproj/argo-cd/v2/reposerver/apiclient"
+	ioutil "github.com/argoproj/argo-cd/v2/util/io"
 
 	sessionmgr "github.com/argoproj/argo-cd/v2/util/session"
 
@@ -62,7 +62,7 @@ func (s *Server) Get(ctx context.Context, q *settingspkg.SettingsQuery) (*settin
 	if err != nil {
 		return nil, err
 	}
-	plugins, err := s.plugins(ctx)
+	plugins, err := s.plugins(ctx, false)
 	if err != nil {
 		return nil, err
 	}
@@ -158,29 +158,41 @@ func (s *Server) Get(ctx context.Context, q *settingspkg.SettingsQuery) (*settin
 	return &set, nil
 }
 
-func (s *Server) plugins(ctx context.Context) ([]*settingspkg.Plugin, error) {
-	in, err := s.mgr.GetConfigManagementPlugins()
+// GetPlugins returns a list of plugins
+func (s *Server) GetPlugins(ctx context.Context, q *settingspkg.SettingsQuery) (*settingspkg.SettingsPluginsResponse, error) {
+	plugins, err := s.plugins(ctx, true)
 	if err != nil {
 		return nil, err
 	}
-	closer, client, err := s.repoClient.NewRepoServerClient()
-	if err != nil {
-		return nil, fmt.Errorf("error creating repo server client: %w", err)
-	}
-	defer ioutil.Close(closer)
+	return &settingspkg.SettingsPluginsResponse{Plugins: plugins}, nil
+}
 
-	pluginList, err := client.ListPlugins(ctx, &empty.Empty{})
+func (s *Server) plugins(ctx context.Context, includeV2Plugins bool) ([]*settingspkg.Plugin, error) {
+	in, err := s.mgr.GetConfigManagementPlugins()
 	if err != nil {
-		return nil, fmt.Errorf("failed to list sidecar plugins from reposerver: %w", err)
+		return nil, err
 	}
-	out := []*settingspkg.Plugin{}
+	var out []*settingspkg.Plugin
 	for _, p := range in {
 		out = append(out, &settingspkg.Plugin{Name: p.Name})
-
 	}
-	if pluginList != nil && len(pluginList.Items) > 0 {
-		for _, p := range pluginList.Items {
-			out = append(out, &settingspkg.Plugin{Name: p.Name})
+
+	if includeV2Plugins {
+		closer, client, err := s.repoClient.NewRepoServerClient()
+		if err != nil {
+			return nil, fmt.Errorf("error creating repo server client: %w", err)
+		}
+		defer ioutil.Close(closer)
+
+		pluginList, err := client.ListPlugins(ctx, &empty.Empty{})
+		if err != nil {
+			return nil, fmt.Errorf("failed to list sidecar plugins from reposerver: %w", err)
+		}
+
+		if pluginList != nil && len(pluginList.Items) > 0 {
+			for _, p := range pluginList.Items {
+				out = append(out, &settingspkg.Plugin{Name: p.Name})
+			}
 		}
 	}
 
@@ -189,7 +201,11 @@ func (s *Server) plugins(ctx context.Context) ([]*settingspkg.Plugin, error) {
 
 // AuthFuncOverride disables authentication for settings service
 func (s *Server) AuthFuncOverride(ctx context.Context, fullMethodName string) (context.Context, error) {
-	// this authenticates the user, but ignores any error, so that we have claims populated
-	ctx, _ = s.authenticator.Authenticate(ctx)
-	return ctx, nil
+	ctx, err := s.authenticator.Authenticate(ctx)
+	if fullMethodName == "/cluster.SettingsService/Get" {
+		// SettingsService/Get API is used by login page.
+		// This authenticates the user, but ignores any error, so that we have claims populated
+		err = nil
+	}
+	return ctx, err
 }

server/settings/settings.proto

@@ -48,6 +48,10 @@ message GoogleAnalyticsConfig {
     bool anonymizeUsers = 2;
 }
 
+message SettingsPluginsResponse {
+    repeated Plugin plugins = 1;
+}
+
 // Help settings
 message Help {
     // the URL for getting chat help, this will typically be your Slack channel for support
@@ -64,7 +68,6 @@ message Plugin {
     string name = 1;
 }
 
-
 message DexConfig {
     repeated Connector connectors = 1;
 }
@@ -88,7 +91,11 @@ service SettingsService {
 
     // Get returns Argo CD settings
     rpc Get(SettingsQuery) returns (Settings) {
-		option (google.api.http).get = "/api/v1/settings";
-	}
+        option (google.api.http).get = "/api/v1/settings";
+    }
 
+    // Get returns Argo CD plugins
+    rpc GetPlugins(SettingsQuery) returns (SettingsPluginsResponse) {
+        option (google.api.http).get = "/api/v1/settings/plugins";
+    }
 }

ui/src/app/applications/components/application-parameters/application-parameters.tsx

@@ -4,7 +4,7 @@ import {FieldApi, FormApi, FormField as ReactFormField, Text, TextArea} from 're
 
 import {ArrayInputField, CheckboxField, EditablePanel, EditablePanelItem, Expandable, TagsInputField} from '../../../shared/components';
 import * as models from '../../../shared/models';
-import {ApplicationSourceDirectory, AuthSettings} from '../../../shared/models';
+import {ApplicationSourceDirectory, Plugin} from '../../../shared/models';
 import {services} from '../../../shared/services';
 import {ImageTagFieldEditor} from './kustomize';
 import * as kustomize from './kustomize-image';
@@ -258,9 +258,9 @@ export const ApplicationParameters = (props: {
             title: 'NAME',
             view: source.plugin && source.plugin.name,
             edit: (formApi: FormApi) => (
-                <DataLoader load={() => services.authService.settings()}>
-                    {(settings: AuthSettings) => (
-                        <FormField formApi={formApi} field='spec.source.plugin.name' component={FormSelect} componentProps={{options: (settings.plugins || []).map(p => p.name)}} />
+                <DataLoader load={() => services.authService.plugins()}>
+                    {(plugins: Plugin[]) => (
+                        <FormField formApi={formApi} field='spec.source.plugin.name' component={FormSelect} componentProps={{options: plugins.map(p => p.name)}} />
                     )}
                 </DataLoader>
             )

ui/src/app/shared/models.ts

@@ -461,7 +461,6 @@ export interface AuthSettings {
         chatText: string;
         binaryUrls: Record<string, string>;
     };
-    plugins: Plugin[];
     userLoginsDisabled: boolean;
     kustomizeVersions: string[];
     uiCssURL: string;

ui/src/app/shared/services/auth-service.ts

@@ -1,8 +1,12 @@
-import {AuthSettings} from '../models';
+import {AuthSettings, Plugin} from '../models';
 import requests from './requests';
 
 export class AuthService {
     public settings(): Promise<AuthSettings> {
         return requests.get('/settings').then(res => res.body as AuthSettings);
     }
+
+    public plugins(): Promise<Plugin[]> {
+        return requests.get('/settings/plugins').then(res => (res.body.plugins || []) as Plugin[]);
+    }
 }