Add groovy script for git credentials configuration

jenkins/Dockerfile

@@ -13,6 +13,11 @@ RUN chown -R jenkins:jenkins /var/cache/jenkins
 ARG VERSION=18.09
 RUN curl -fsSL https://get.docker.com -o get-docker.sh | sh
 
+# Generates an SSH key-pair to use with Gitlab
+# TODO: replace placeholder email (note that this is not really necessary)
+RUN mkdir -p "/home/jenkins/.ssh"
+RUN ssh-keygen -t ed25519 -C "example@email.com" -N "" -f "/home/jenkins/.ssh/gitlab-ssh"
+
 USER jenkins
 
 # Security configuration scripts

jenkins/configuration/credentials.groovy

@@ -0,0 +1,52 @@
+// This script is based on the sources listed bellow:
+// https://gist.github.com/hayderimran7/d6ab8a6a770cb970349e
+// https://gist.github.com/ivan-pinatti/de063b610d1bdf2da229c7874968f4d9
+// https://support.cloudbees.com/hc/en-us/articles/217708168-create-credentials-from-groovy
+
+import jenkins.model.Jenkins
+import com.cloudbees.jenkins.plugins.sshcredentials.impl.*
+import com.cloudbees.plugins.credentials.*
+import com.cloudbees.plugins.credentials.common.*
+import com.cloudbees.plugins.credentials.domains.Domain
+import com.cloudbees.plugins.credentials.impl.*
+import hudson.util.Secret
+import java.nio.file.Files
+import net.sf.json.JSONObject
+import org.jenkinsci.plugins.plaincredentials.impl.*
+
+String privateKeyFilePath = "/home/jenkins/.ssh/gitlab-ssh"
+File privateKeyFile = new File(privateKeyFilePath)
+String privateKeyString = privateKeyFile.text
+
+def gitlabSSHKeyParameters = [
+  description:  'Gitlab SSH Key',
+  id:           'gitlab-ssh-key',
+  secret:       '',
+  userName:     'jenkins',
+  key:          new BasicSSHUserPrivateKey.DirectEntryPrivateKeySource(privateKeyString)
+]
+
+// Gets Jenkins instance
+Jenkins jenkins = Jenkins.getInstance()
+
+// Gets credentials domain
+def globalDomain = Domain.global()
+
+// Gets credentials store
+def credentialsStore = jenkins.getExtensionList('com.cloudbees.plugins.credentials.SystemCredentialsProvider')[0].getStore()
+
+// Defines private key
+def privatKey = new BasicSSHUserPrivateKey(
+  CredentialsScope.GLOBAL,
+  gitlabSSHKeyParameters.id,
+  gitlabSSHKeyParameters.username,
+  gitlabSSHKeyParameters.key,
+  gitlabSSHKeyParameters.secret,
+  gitlabSSHKeyParameters.description
+)
+
+// Adds credential to store
+credentialsStore.addCredentials(globalDomain, privatKey)
+
+// Saves to disk
+jenkins.save()

jenkins/plugins.txt

@@ -24,10 +24,12 @@ blueocean-rest
 blueocean-rest-impl
 blueocean-web
 bouncycastle-api
+bouncycastle-api.bak
 branch-api
 cloudbees-bitbucket-branch-source
 cloudbees-folder
 command-launcher
+command-launcher.bak
 credentials
 credentials-binding
 display-url-api
@@ -41,10 +43,12 @@ git-server
 github
 github-api
 github-branch-source
+gitlab-plugin
 handy-uri-templates-2-api
 htmlpublisher
 jackson2-api
 jdk-tool
+jdk-tool.bak
 jenkins-design-language
 jira
 jquery-detached

utility-scripts/printJenkinsGitlabSSHPublicKey.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+docker exec -it jenkins cat "/home/jenkins/.ssh/gitlab-ssh.pub"