manage artifacts

Jenkinsfile

@@ -13,7 +13,7 @@ pipeline {
         withDockerRegistry([ credentialsId: registry_credentials, url: "https://"+registry ]) {
           echo 'Starting to build docker image'
           script {
-            def customImage = docker.build(registry+'/'+repo+'/'+project, "--build-arg VERSION=$version --build-arg DATE=$timeStamp .")
+            def customImage = docker.build(registry+'/'+repo+'/'+project, "--pull --build-arg VERSION=$version --build-arg DATE=$timeStamp .")
             customImage.push(version)
             customImage.push(version.split(/\./)[0,1].join('.'))
             customImage.push(version.split(/\./)[0])
@@ -43,8 +43,36 @@ pipeline {
   }
 
   post {
+    success {
+      sh """docker rmi -f \$(docker images -q $registry/$repo/$project:$version)"""
+      sh """for image in \$(grep FROM Dockerfile | cut -d ' ' -f 2); do docker rmi -f \$(docker images -q \${image}); done"""
+    }
     always {
       emailext body: 'build finished', subject: '[jenkins] docker '+project+': ' + currentBuild.result, to: 'cg@zknt.org', from: 'sysadm@zknt.org', attachLog: true
     }
   }
+  options {
+    buildDiscarder(BuildHistoryManager([
+      [
+        conditions: [
+          BuildResult(matchFailure: true)
+        ],
+        matchAtMost: 4,
+        continueAfterMatch: false
+      ],
+      [
+        conditions: [
+          BuildResult(matchSuccess: true)
+        ],
+        matchAtMost: 4,
+        continueAfterMatch: false
+      ],
+      [
+        conditions: [
+          BuildResult(matchSuccess: true, matchFailure: true)
+        ],
+        actions: [DeleteBuild()]
+      ]
+    ]))
+  }
 }