✨ Add Jenkins Node (#2345)

* feat: initial jenkins setup

* feat: trigger job functionality

* feat: copy a job

* feat: basic Jenkins instance operations

* feat: create job from xml

* feat: trigger with params

* feat: basic build list

* feat: list build with params

* feat: basic credentials test

* chore: linting fixes

* feat: use baseUrl from credentials

* chore: naming fixes

* feat: filters collection for getall buils

* fix: better ui and credentials

* chore: alphabetize params and fix typos

* ⚡ Small changes

* ⚡ Improvements

* ⚡ Improvements

* ⚡ Improvements

* ⚡ Improvements

* ⚡ Improvements

* ⚡ Improvements

* ⚡ Some improvements

Co-authored-by: ricardo <ricardoespinoza105@gmail.com>
Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>

packages/nodes-base/nodes/Jenkins/GenericFunctions.ts

@@ -0,0 +1,45 @@
+import {
+	OptionsWithUri,
+} from 'request';
+
+import {
+	IExecuteFunctions,
+	IExecuteSingleFunctions,
+	IHookFunctions,
+	ILoadOptionsFunctions,
+} from 'n8n-core';
+
+import {
+	IDataObject,
+	NodeApiError,
+} from 'n8n-workflow';
+
+export async function jenkinsApiRequest(this: IHookFunctions | IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, method: string, uri: string, qs: IDataObject = {}, body: any = '', option: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
+	const credentials = await this.getCredentials('jenkinsApi') as IDataObject;
+	let options: OptionsWithUri = {
+		headers: {
+			'Accept': 'application/json',
+		},
+		method,
+		auth: {
+			username: credentials.username as string,
+			password: credentials.apiKey as string,
+		},
+		uri: `${tolerateTrailingSlash(credentials.baseUrl as string)}${uri}`,
+		json: true,
+		qs,
+		body,
+	};
+	options = Object.assign({}, options, option);
+	try {
+		return await this.helpers.request!(options);
+	} catch (error) {
+		throw new NodeApiError(this.getNode(), error);
+	}
+}
+
+export function tolerateTrailingSlash(baseUrl: string) {
+	return baseUrl.endsWith('/')
+		? baseUrl.substr(0, baseUrl.length - 1)
+		: baseUrl;
+}