Remember that in groovy

if ("false") {
 println("Hello world")
}

will indeed echo Hello world

Use

if (clean.toBoolean()) {
  sh "echo clean"
}

should work better for you.

Vincent

2015-02-19 10:05 GMT+01:00 <sebastien.barthel...@gmail.com>:

> Hello,
>
> I would like to add a build parameter "clean" which is true by default,
> but, when false, make the job skip the clean step.
>
> Here is my script
>
> echo "clean: ${clean}"
>> node("qisrc") {
>>   echo "clean: ${clean}"
>>   if (clean) {
>>     sh "echo clean"
>>   }
>>   sh "echo build"
>> }
>>
>
> Here is what happens when I build with clean parameter unchecked:
>
> Running: Print Message
>> clean: false
>> Running: Allocate node : Start
>> Running on qisrc in /home/jenkins/jenkins/workspace/workflow
>> Running: Allocate node : Body : Start
>> Running: Print Message
>> clean: false
>> Running: Shell Script
>> [workflow] Running shell script
>> + echo clean
>> clean
>> Running: Shell Script
>> [workflow] Running shell script
>> + echo build
>> build
>> Running: Allocate node : Body : End
>> Running: Allocate node : End
>> Running: End of Workflow
>> Finished: SUCCESS
>>
>>
> As you can see, the variable "clean" is false as expected, but the sh
> "echo clean" command is ran anyway.
>
> Is it expected?
>
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