Jenkins Build Pipeline fileLoad in library files not working - jenkins

Question

I'm using the Workflow Remote Loader plugin's fileLoad function to load dependencies for my build script. In my main file, I have the following:
build-app.groovy
def java
def util
node {
stage "Setup"
fileLoader.withGit('git#github.com:myorg/build-scripts.git', 'master', '234720asdf8ed1a2', '') {
java = fileLoader.load('lib/java.groovy');
util = fileLoader.load('lib/util.groovy');
}
util.checkIfFileExists('myFile.txt')
def version = java.getJarVersion("api")
}
util.checkIfFileExists() works perfectly, but a problem occurs when java.getJarVersion is called. In getJarVersion there is also a dependency on util. My java lib is as follows:
java.groovy
def util = fileLoader.load('lib/util.groovy')
def getJarVersion() {
...
util.checkIfFileExists('myFile.txt')
...
}
This gives the following error when I run in Jenkins:
groovy.lang.MissingPropertyException: No such property: util for class: groovy.lang.Binding
at groovy.lang.Binding.getVariable(Binding.java:62)
at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onGetProperty(SandboxInterceptor.java:224)
at org.kohsuke.groovy.sandbox.impl.Checker$4.call(Checker.java:241)
at org.kohsuke.groovy.sandbox.impl.Checker.checkedGetProperty(Checker.java:238)
at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.getProperty(SandboxInvoker.java:23)
at com.cloudbees.groovy.cps.impl.PropertyAccessBlock.rawGet(PropertyAccessBlock.java:17)
at Script4.checkIfFileExists(Script4.groovy:39)
at Script4.getJarVersion(Script4.groovy:23)
at WorkflowScript.run(WorkflowScript:18)
at ___cps.transform___(Native Method)
at com.cloudbees.groovy.cps.impl.PropertyishBlock$ContinuationImpl.get(PropertyishBlock.java:62)
at com.cloudbees.groovy.cps.LValueBlock$GetAdapter.receive(LValueBlock.java:30)
at com.cloudbees.groovy.cps.impl.PropertyishBlock$ContinuationImpl.fixName(PropertyishBlock.java:54)
at sun.reflect.GeneratedMethodAccessor254.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
at com.cloudbees.groovy.cps.impl.ConstantBlock.eval(ConstantBlock.java:21)
at com.cloudbees.groovy.cps.Next.step(Next.java:58)
at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:154)
at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:18)
at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:32)
at org.jenkinsci.plugins.workflow.cps.SandboxContinuable$1.call(SandboxContinuable.java:29)
at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.GroovySandbox.runInSandbox(GroovySandbox.java:108)
at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:29)
at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:164)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:276)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$000(CpsThreadGroup.java:78)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:185)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:183)
at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:47)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
The plugin's doc says:
Use static initializers within the Groovy file of the loaded file to
load more context from neighbor files.
I've tried static def util = fileLoader.load('lib/util.groovy'), but this produced the same error. I've also tried a variety of other combinations to no avail. Maybe this is some lack of understanding of the groovy language? Not really sure.
Thanks in advance!

Answer 1

For those coming here from Google on a similar error message, you have to install the Pipeline Remote Loader plugin. Otherwise it will give you:
groovy.lang.MissingPropertyException: No such property: fileLoader for class: groovy.lang.Binding

Answer 2

OK, after much trial and error, I figured out the issue.
java.groovy before:
def util = fileLoader.load('lib/util.groovy')
def getJarVersion() {
...
util.checkIfFileExists('myFile.txt')
...
}
return this;
java.groovy after:
def getJarVersion() {
...
util.checkIfFileExists('myFile.txt')
...
}
this.util = fileLoader.load('lib/util.groovy')
return this;
The return this; line was omitted from the original post because it was in the documentation of the remote file loader plugin, but it's key. When java.groovy is loaded from build.groovy it is using the returned this as the scope the calls made to java.groovy. This scope did not include util when it was defined as def util = fileLoader.load('lib/util.groovy'). Adding it to this before returning it put util in scope for all function calls in the file.