feat(argocd): implement manager (#9771)

lib/manager/api.ts

 import * as ansible from './ansible';
 import * as ansibleGalaxy from './ansible-galaxy';
+import * as argoCD from './argocd';
 import * as azurePipelines from './azure-pipelines';
 import * as batect from './batect';
 import * as batectWrapper from './batect-wrapper';
@@ -65,6 +66,7 @@ export default api;
 
 api.set('ansible', ansible);
 api.set('ansible-galaxy', ansibleGalaxy);
+api.set('argocd', argoCD);
 api.set('azure-pipelines', azurePipelines);
 api.set('batect', batect);
 api.set('batect-wrapper', batectWrapper);

lib/manager/argocd/__fixtures__/malformedApplications.yml

+---
+# malformed application as the source section is missing
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+spec:
+  target:
+    namespace: testing
+---
+# malformed application as the source section is missing
+apiVersion: argoproj.io/v1alpha1
+kind: Application

lib/manager/argocd/__fixtures__/randomManifest.yml

+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  labels:
+    app: nginx
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: nginx
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+        - name: nginx
+          image: nginx:1.14.2
+          ports:
+            - containerPort: 80

lib/manager/argocd/__fixtures__/validApplication.yml

+---
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+spec:
+  source:
+    chart: kube-state-metrics
+    repoURL: https://prometheus-community.github.io/helm-charts
+    targetRevision: 2.4.1
+---
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+spec:
+  source:
+    chart: traefik
+    helm:
+      values: |
+        traefik:
+          service:
+            spec:
+              loadBalancerIP: 1.2.3.4
+    repoURL: gs://helm-charts-internal
+    targetRevision: 0.0.2
+---
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+spec:
+  source:
+    repoURL: https://git.example.com/foo/bar.git
+    targetRevision: v1.2.0
+---
+# malformed application as the source section is missing
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+spec:
+  target:
+    namespace: testing

lib/manager/argocd/__snapshots__/extract.spec.ts.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`manager/argocd/extract extractPackageFile() full test 1`] = `
+Array [
+  Object {
+    "currentValue": "2.4.1",
+    "datasource": "helm",
+    "depName": "kube-state-metrics",
+    "registryUrls": Array [
+      "https://prometheus-community.github.io/helm-charts",
+    ],
+  },
+  Object {
+    "currentValue": "0.0.2",
+    "datasource": "helm",
+    "depName": "traefik",
+    "registryUrls": Array [
+      "gs://helm-charts-internal",
+    ],
+  },
+  Object {
+    "currentValue": "v1.2.0",
+    "datasource": "git-tags",
+    "depName": "https://git.example.com/foo/bar.git",
+  },
+]
+`;

lib/manager/argocd/extract.spec.ts

+import { getName, loadFixture } from '../../../test/util';
+import { extractPackageFile } from './extract';
+
+const validApplication = loadFixture('validApplication.yml');
+const malformedApplication = loadFixture('malformedApplications.yml');
+const randomManifest = loadFixture('randomManifest.yml');
+
+describe(getName(), () => {
+  describe('extractPackageFile()', () => {
+    it('returns null for empty', () => {
+      expect(extractPackageFile('nothing here', 'applications.yml')).toBeNull();
+    });
+
+    it('return null for kubernetes manifest', () => {
+      const result = extractPackageFile(randomManifest, 'applications.yml');
+      expect(result).toBeNull();
+    });
+
+    it('return null if deps array would be empty', () => {
+      const result = extractPackageFile(
+        malformedApplication,
+        'applications.yml'
+      );
+      expect(result).toBeNull();
+    });
+
+    it('full test', () => {
+      const result = extractPackageFile(validApplication, 'applications.yml');
+      expect(result).not.toBeNull();
+      expect(result.deps).toBeArrayOfSize(3);
+      expect(result.deps).toMatchSnapshot();
+    });
+  });
+});

lib/manager/argocd/extract.ts

+import { safeLoadAll } from 'js-yaml';
+import * as gitTags from '../../datasource/git-tags';
+import * as helm from '../../datasource/helm';
+import type { ExtractConfig, PackageDependency, PackageFile } from '../types';
+import type { ApplicationDefinition } from './types';
+import { fileTestRegex } from './util';
+
+function createDependency(
+  definition: ApplicationDefinition
+): PackageDependency {
+  const source = definition.spec?.source;
+
+  if (source == null) {
+    return null;
+  }
+
+  // a chart variable is defined this is helm declaration
+  if (source.chart) {
+    return {
+      depName: source.chart,
+      registryUrls: [source.repoURL],
+      currentValue: source.targetRevision,
+      datasource: helm.id,
+    };
+  }
+  return {
+    depName: source.repoURL,
+    currentValue: source.targetRevision,
+    datasource: gitTags.id,
+  };
+}
+
+export function extractPackageFile(
+  content: string,
+  fileName: string,
+  config?: ExtractConfig
+): PackageFile | null {
+  // check for argo reference. API version for the kind attribute is used
+  if (fileTestRegex.test(content) === false) {
+    return null;
+  }
+
+  const definitions: ApplicationDefinition[] = safeLoadAll(content);
+
+  const deps = definitions
+    .map((definition) => createDependency(definition))
+    .filter(Boolean);
+
+  return deps.length ? { deps } : null;
+}

lib/manager/argocd/index.ts

+export { extractPackageFile } from './extract';
+
+export const defaultConfig = {
+  fileMatch: [],
+};

lib/manager/argocd/readme.md

+The `argocd` manager has no `fileMatch` default patterns, so it won't match any files until you configure it with a pattern. This is because there is no commonly accepted file/directory naming convention for argocd YAML files and we don't want to check every single `*.yaml` file in repositories just in case any of them contain ArgoCD definitions.
+
+If most `.yaml` files in your repository are argocd ones, then you could add this to your config:
+
+```json
+{
+  "argocd": {
+    "fileMatch": ["\\.yaml$"]
+  }
+}
+```
+
+If instead you have them all inside a `argocd/` directory, you would add this:
+
+```json
+{
+  "argocd": {
+    "fileMatch": ["argocd/.+\\.yaml$"]
+  }
+}
+```
+
+Or if it's just a single file then something like this:
+
+```json
+{
+  "argocd": {
+    "fileMatch": ["^config/applications\\.yaml$"]
+  }
+}
+```
+
+If you need to change the versioning format, read the [versioning](https://docs.renovatebot.com/modules/versioning/) documentation to learn more.

lib/manager/argocd/types.ts

+export interface ApplicationDefinition {
+  spec: {
+    source: {
+      chart?: string;
+      repoURL: string;
+      targetRevision: string;
+    };
+  };
+}

lib/manager/argocd/util.ts

+export const keyValueExtractionRegex = /^\s*(?<key>[^\s]+):\s+"?(?<value>[^"\s]+)"?\s*$/;
+// looks for `apiVersion: argoproj.io/
+export const fileTestRegex = /\s*apiVersion:\s*argoproj.io\/\s*/;