jjb: Fix crash when trying to launch a job that is not defined

Original error:

```
Launching job: baremetal_tests_kmaster_lmaster
ERROR: Build step failed with exception
java.lang.NullPointerException: Cannot invoke method getProperty() on null object
	at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:91)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:47)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
	at org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:34)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
	at hudson.model.Job$getProperty$0.call(Unknown Source)
	at Script1$_run_closure8.doCall(Script1.groovy:273)
...
```

After applying this correction, a run with undefined jobs would look
like this:

```
Launching job: baremetal_tests_kmaster_lmaster
Failed to find job by name 'baremetal_tests_klinux-6.1.y_lmaster'
Launching job: baremetal_tests_klinux-5.15.y_lmaster
...
```

Change-Id: Idedb693816c4928a5318397a724a6096dd544f7d

diff --git a/scripts/system-tests/system-trigger.groovy b/scripts/system-tests/system-trigger.groovy
index fd5b901cedd095e1bee178077128e243baaf021f..c4013daabdf73d3a9f50f656fd1505dd822a608d 100644 (file)
--- a/scripts/system-tests/system-trigger.groovy
+++ b/scripts/system-tests/system-trigger.groovy
@@ -269,6 +269,10 @@ def CraftJobName = { jobType, linuxBranch, lttngBranch ->
 
 def LaunchJob = { jobName, jobInfo ->
   def job = Hudson.instance.getJob(jobName)
+  if (job == null) {
+    println(String.format("Failed to find job by name '%s'", jobName))
+    return null;
+  }
   def params = []
   for (paramdef in job.getProperty(ParametersDefinitionProperty.class).getParameterDefinitions()) {
     // If there is a default value for this parameter, use it. Don't use empty
@@ -451,7 +455,7 @@ while (ongoingJobs > 0) {
 
     // The isCancelled() method checks if the run was cancelled before
     // execution. We consider such run as being aborted.
-    if (jobBuild.isCancelled()) {
+    if (jobBuild == null || jobBuild.isCancelled()) {
       println("${jobName} was cancelled before launch.")
       isAborted = true;
       abortedRuns.add(jobName);