CodeLens to apply and delete a k8s YAML file

Closes #2873

Signed-off-by: David Thompson <davthomp@redhat.com>

Author: datho7561

package.json

@@ -190,6 +190,7 @@
 		"onCommand:openshift.oc.about",
 		"onCommand:openshift.output",
 		"onCommand:openshift.create",
+		"onCommand:openshift.delete",
 		"onCommand:openshift.open.developerConsole",
 		"onCommand:openshift.open.developerConsole.palette",
 		"onCommand:openshift.explorer.addCluster",
@@ -263,6 +264,11 @@
 				"title": "Create",
 				"category": "OpenShift"
 			},
+			{
+				"command": "openshift.delete",
+				"title": "Delete",
+				"category": "OpenShift"
+			},
 			{
 				"command": "clusters.openshift.build.start",
 				"title": "Start Build",

src/extension.ts

@@ -31,6 +31,7 @@ import { setupWorkspaceDevfileContext } from './util/workspace';
 import { registerCommands } from './vscommand';
 import { OpenShiftTerminalManager } from './webview/openshift-terminal/openShiftTerminal';
 import { WelcomePage } from './welcomePage';
+import { registerYamlHandlers } from './yaml/yamlDocumentFeatures';
 
 import fsx = require('fs-extra');
 
@@ -104,6 +105,7 @@ export async function activate(extensionContext: ExtensionContext): Promise<unkn
         ComponentsTreeDataProvider.instance.createTreeView('openshiftComponentsView'),
         setupWorkspaceDevfileContext(),
         window.registerWebviewViewProvider('openShiftTerminalView', OpenShiftTerminalManager.getInstance(), { webviewOptions: { retainContextWhenHidden: true, } }),
+        ...registerYamlHandlers(),
     ];
     disposable.forEach((value) => extensionContext.subscriptions.push(value));
 

src/oc/ocWrapper.ts

@@ -124,6 +124,17 @@ export class Oc {
         );
     }
 
+    /**
+     * Delete the Kubernetes object described by the given file.
+     *
+     * @param file the file containing the spec of the kubernetes object to delete
+     */
+    public async deleteKubernetesObjectFromFile(file: string): Promise<void> {
+        await CliChannel.getInstance().executeTool(
+            new CommandText('oc', 'delete', [new CommandOption('-f', file)])
+        );
+    }
+
     /**
      * Returns the username of the current user.
      *

src/yaml/yamlDocumentFeatures.ts

@@ -0,0 +1,65 @@
+/*-----------------------------------------------------------------------------------------------
+ *  Copyright (c) Red Hat, Inc. All rights reserved.
+ *  Licensed under the MIT License. See LICENSE file in the project root for license information.
+ *-----------------------------------------------------------------------------------------------*/
+
+import { KubernetesObject } from '@kubernetes/client-node';
+import { load as loadYaml } from 'js-yaml';
+import * as vscode from 'vscode';
+
+const YAML_SELECTOR: vscode.DocumentSelector = {
+    language: 'yaml',
+    scheme: 'file'
+};
+
+const RANGE: vscode.Range = new vscode.Range(new vscode.Position(0, 0), new vscode.Position(0, 1));
+
+export function registerYamlHandlers(): vscode.Disposable[] {
+    const disposables: vscode.Disposable[] = [];
+    disposables.push(
+        vscode.languages.registerCodeLensProvider(YAML_SELECTOR, new YamlCodeLensProvider()));
+    return disposables;
+}
+
+class YamlCodeLensProvider implements vscode.CodeLensProvider {
+    provideCodeLenses(document: vscode.TextDocument, _token: vscode.CancellationToken): vscode.ProviderResult<vscode.CodeLens[]> {
+
+        try {
+
+            const objectTexts: string[] = document.getText().split(/(?:^---\r?\n)|(?:\n---\r?\n)/).filter(text => text && text.length > 0);
+
+            for (const objectText of objectTexts) {
+                const yaml = loadYaml(objectText) as KubernetesObject;
+
+                // heuristic to check if it's a k8s yaml
+                if (!yaml.apiVersion || !yaml.kind || !yaml.metadata) {
+                    return [];
+                }
+            }
+
+        } catch (e) {
+            return [];
+        }
+
+        return [
+            {
+                isResolved: true,
+                range: RANGE,
+                command: {
+                    command: 'openshift.create',
+                    title: 'Apply YAML to cluster',
+                    tooltip: 'Performs `kubectl apply -f` on this file'
+                }
+            },
+            {
+                isResolved: true,
+                range: RANGE,
+                command: {
+                    command: 'openshift.delete',
+                    title: 'Delete YAML from cluster',
+                    tooltip: 'Performs `kubectl delete -f` on this file'
+                }
+            }
+        ];
+    }
+}

src/yamlFileCommands.ts

@@ -54,4 +54,47 @@ export class YamlFileCommands {
         await OcWrapper.Instance.createKubernetesObjectFromFile(document.fileName);
         return 'Resources were successfully created.';
     }
+
+    @vsCommand('openshift.delete')
+    @clusterRequired()
+    public static async delete(): Promise<string | null> {
+        const document = window.activeTextEditor ? window.activeTextEditor.document : undefined;
+        const pleaseSave = 'Please save your changes before executing \'OpenShift: Delete\' command.';
+        let message: string;
+
+        if (!document
+            || !(document.fileName.endsWith('.yaml') || document.fileName.endsWith('.json'))) {
+            message =
+                '\'OpenShift: Delete\' command requires a .yaml or a .json file opened in editor.';
+        }
+
+        if (!message && document.isUntitled) {
+            message = pleaseSave;
+        }
+
+        if (!message && document.isDirty) {
+            const save = 'Save';
+            const action = await window.showInformationMessage('Editor has unsaved changes.', save);
+            if (action !== save) {
+                message = pleaseSave;
+            } else {
+                await document.save();
+            }
+        }
+
+        const activeProject = await YamlFileCommands.odo.getActiveProject();
+
+        if (!message && !activeProject) {
+            message = '\'OpenShift: Delete\' requires setting a project as active, and none is currently set.';
+        }
+
+        if (message) {
+            void window.showWarningMessage(message);
+            return null;
+        }
+
+        await OcWrapper.Instance.deleteKubernetesObjectFromFile(document.fileName);
+        return 'Resources were successfully deleted.';
+    }
+
 }

test/integration/ocWrapper.test.ts

@@ -152,6 +152,13 @@ suite('./oc/ocWrapper.ts', function () {
             const deployments = await Oc.Instance.getKubernetesObjects('Deployment');
             expect(deployments).to.have.length(0);
         });
+
+        test('deleteKubernetesObjectFromFile()', async function() {
+            await Oc.Instance.createKubernetesObjectFromFile(yamlFile);
+            await Oc.Instance.deleteKubernetesObjectFromFile(yamlFile);
+            const deployments = await Oc.Instance.getKubernetesObjects('Deployment');
+            expect(deployments).to.have.length(0);
+        });
     });
 
     test('getConsoleInfo()', async function() {