add send mail as post action

Jenkinsfile

@@ -10,6 +10,14 @@ pipeline {
     agent {
         label 'CD'
     }
+    
+    environment {
+        AGENT_ROOT_FOLDER = "${agent_root_folder}"
+        PIPELINE_BUILD_NUMBER = "${env.BUILD_NUMBER}"
+        WALKER_NOTES = "${agent_root_folder}/walker_notes.${pipeline_build_number}.md"
+    }
+    
+    
     parameters {
         string(name: 'jenkins_project',
                 defaultValue: '',
@@ -69,6 +77,34 @@ pipeline {
             }
         }
     }
+        // post-build actions
+    post {
+        always {
+            script {
+                sh '''
+                  cp $WALKER_NOTES ./walker_notes.${PIPELINE_BUILD_NUMBER}.md
+                  cat ./$WALKER_NOTES
+                  '''
+            }
+        }
+        success {
+            echo 'The dependencies walker pipeline worked!'
+            emailext to: 'jenkinsbuilds@d4science.org',
+                    subject: "[Jenkins WalkerPipeline D4S] build ${currentBuild.fullDisplayName} worked",
+                    body: "Build time: ${currentBuild.durationString}. See ${env.BUILD_URL}"
+            emailext attachmentsPattern: "**/walker_notes.${PIPELINE_BUILD_NUMBER}.md",
+                    to: 'jenkinsreleases@d4science.org',
+                    subject: "Walker Dependencies for gCube component ${inputProject} (build #${PIPELINE_BUILD_NUMBER})",
+                    body: "Release notes extracted from the CHANGELOG.md(s) of the released components. See ${env.BUILD_URL}"
+        }
+        failure {
+            echo 'The dependencies walker pipeline has failed'
+            emailext attachLog: true,
+                    to: 'jenkinsbuilds@d4science.org',
+                    subject: "[JenkinsDependenciesWalker D4S] build ${currentBuild.fullDisplayName} failed",
+                    body: "Something is wrong with ${env.BUILD_URL}"
+        }
+    }
 
 }
 // look for modules that use this artifact
@@ -145,6 +181,42 @@ def printReport(report) {
     }
     println text
 }
+
+// print the final report
+def saveReport(report) {
+    def text = ''
+    def indent = '\t'
+    text += "Dependency Report for ${report['project']}"
+    text += "\n\n"
+    text += "|--Project Maven Modules\n"
+    report['downstream_modules'].each { depth, artifacts ->
+        artifacts.each { name, data ->
+            text += "${indent}|--Module: ${name}\n"
+            text += "${indent * 2}|--Deepest Dependency Level: ${depth}\n"
+            text += "${indent * 2}|--Used by (Maven Modules)\n"
+            data['dependencies'].each { d ->
+                text += "${indent * 3}|--${d}"
+                text += "\n"
+            }
+            text += "${indent * 2}|--Referred by (Jenkins Projects)\n"
+            data['projects'].each { p ->
+                text += "${indent * 3}|--${p}"
+                text += "\n"
+            }
+        }
+    }
+
+    text += "\n\n"
+    text += "|--All Downstream Projects\n"
+    report['downstream_projects'].unique().sort()
+    report['downstream_projects'].each { p ->
+        text += "${indent}|--${p}"
+        text += "\n"
+    }
+    text >  WALKER_NOTES
+}
+
+
 // debug job
 def printJob(job) {
     println("fullname ${job.fullName}")