Resume from a given report number.

Jenkinsfile

@@ -5,7 +5,7 @@ import org.yaml.snakeyaml.Yaml
 def (options, maven_local_repo_path, maven_settings_file, maven_parent_file) = ['', '', '', '']
 def agent_root_folder = '/var/lib/jenkins/.m2'
 def verbose = true
-def resume = params.resume
+def resume = params.resume_from
 if (params.Type == 'SNAPSHOT-DRY-RUN') {
     echo "Configure Maven for SNAPSHOT-DRY-RUN artifacts"
     options = ''
@@ -70,12 +70,14 @@ if (verbose) {
     jsonConfig.gCube_release.Components.each { println it.key }
 }
 
-def report_number = env.BUILD_NUMBER -1
-def previous_report_file = "${agent_root_folder}/build_jobs.${report_number}.csv"
-echo "Previous report file: ${previous_report_file}"
-def jobs = parseJobs(previous_report_file)
-for (job in jobs)
-    println job
+def jobs = [:]
+if (resume_from) {
+    def previous_report_file = "${agent_root_folder}/build_jobs.${resume_from}.csv"
+    echo "Previous report file: ${previous_report_file}"
+    jobs = parseJobs(previous_report_file)
+    for (job in jobs)
+        println job
+}
 
 
 pipeline {
@@ -122,9 +124,9 @@ pipeline {
                 defaultValue: true,
                 description: 'Wipe out the local maven repository before the builds?')
 
-         booleanParam(name: 'resume',
-                defaultValue: false,
-                description: 'Resume from previous build?')
+         string(name: 'resume_from',
+                defaultValue: '',
+                description: 'Resume from a previous build identified by the build number.')
     }
 
     //see https://jenkins.io/doc/book/pipeline/syntax/#stages