Fix bug that was cleaning up the levels too early

Jenkinsfile

@@ -2,7 +2,7 @@ def projects2artifacts = [:]
 def artifacts2projects = [:]
 def modules2deps = [:]
 def alreadyInTheTree = []
-def inputProject = params.jenkins_project
+def inputProject = params.jenkins_project.trim()
 def report = [:]
 report['project'] = inputProject
 
@@ -52,7 +52,7 @@ pipeline {
                     def downstreamdeps = [:]
                     report['downstream_modules'] = [:]
                     report['downstream_projects'] = []
-                    report['downstream_modules']['L1'] = [:]
+                    for ( level in 1..50 ) report['downstream_modules']["L${level}"] = [:] // can't initialize with withDefault closure in jenkins
                     projects2artifacts[inputProject].each { a ->
                          if (a.split(':').length > 1) { //skip the parent (only groupId)
                             report = analyzeDependency(modules2deps, alreadyInTheTree, artifacts2projects, report, a, 1) }
@@ -76,7 +76,7 @@ def findDownstreamDependencies(modules2deps, artifact) {
     def downdeps = []
     //println "Looking for users of ${artifact}"
     modules2deps.each { k, v -> if (v.contains("${artifact}")) downdeps << k }
-    downdeps
+    return downdeps
 }
 
 //build the report of the given dependency, go recursive on its dependencies
@@ -98,16 +98,15 @@ def analyzeDependency(modules2deps, alreadyInTheTree, artifacts2projects, report
     }
 
     // then we look for the projects that build the downstream dependencies and finally we go recursive
-    if (downdeps) {
+    if (downdeps.size() > 0) {
         def nextDepth = ++depth
-        report['downstream_modules']["L${nextDepth}"] = [:]
         downdeps.each { d ->
             if (!skipTree) {
                 report['downstream_modules'][level][artifact]['projects'] << artifacts2projects[d]
                 report['downstream_projects'] << artifacts2projects[d]
             }
             // go recursive
-            analyzeDependency(modules2deps, alreadyInTheTree, artifacts2projects, report, d, nextDepth)
+            report = analyzeDependency(modules2deps, alreadyInTheTree, artifacts2projects, report, d, nextDepth)
         }
     }
     report