Did make use of the "Replay" feature at all to troubleshoot your script,
Norbert? Just curious.

https://jenkins.io/blog/2016/04/14/replay-with-pipeline/



On Wed, Apr 27, 2016 at 3:34 PM, Brian Ray <[email protected]> wrote:

> Nice hackaround. I will try that in the uncooperative parts of my script.
>
> Ah yes, *def x* vs *x*. On the face of it the two declarations should be
> identical--roughly typing *x* as an *Object*. But there are different
> scoping implications
> <http://stackoverflow.com/questions/15619216/groovy-scope-how-to-access-script-variable-in-a-method>
> for each.
>
>
> On Wednesday, April 27, 2016 at 3:00:43 PM UTC-7, Norbert Lange wrote:
>>
>> Hi Brian,
>>
>> every single method in the "final foo...." - including the String
>> Constructor requires approval. I was hoping for a proper subset that would
>> work within the sandbox.
>> What I ended with (several dozen "Builds" later ) is using a helper
>> function squeezing the map into a list, seems the most sane aproach so far
>> =(
>>
>> Btw, whats the difference of using "def x" vs "x"?
>>
>> node {
>>     ....
>>     for (it2 in mapToList(depmap)) {
>>         name = it2[0]
>>         revision = it2[1]
>>     }
>> }
>> @NonCPS
>> def mapToList(depmap) {
>>     def dlist = []
>>     for (entry in depmap) {
>>         dlist.add([entry.key, entry.value])
>>     }
>>     dlist
>> }
>>
>>
>>
>>
>> Am Mittwoch, 27. April 2016 18:26:51 UTC+2 schrieb Brian Ray:
>>>
>>> FWIW I recently replaced several C-style loops with *for ( x in y )*
>>> for iterating over both lists and maps in CPS code and for the most part
>>> conversion went fine. There were a couple of CPS sections where I could not
>>> use that construct and had to fall back on the C-loops and further do a
>>> torturous cast to avoid a serialization error getting keys and values from
>>> the map. I want to say *Set<Map.Entry<K,V>>* caused the exception
>>> because *AbstractMap.SimpleEntry* and *.SimpleImmutableEntry* are
>>> serializable, while *Set *is not, per the JDK.
>>>
>>> for ( int i = 0; i < myMap.size(); i++ ) {
>>>
>>>   // hacktacular String() cloning to avoid NotSerializableException;
>>> also
>>>   // hacktacular Map > Set > Array morph to enable C-style looping
>>>   final foo = new String( myMap.entrySet().toArray()[i].value )
>>>
>>>   // do stuff with foo...
>>>
>>> }
>>>
>>>
>>> Nonetheless as mentioned in another part of the script I had no problem
>>> using the shorter alternative, nor accessing keys and values using
>>> *myMap.key* and *myMap.value*. Not sure what the difference is with my
>>> more stubborn loop.
>>>
>>> On Wednesday, April 27, 2016 at 8:21:45 AM UTC-7, Norbert Lange wrote:
>>>>
>>>>
>>>>
>>>> Am Mittwoch, 27. April 2016 16:41:40 UTC+2 schrieb Jesse Glick:
>>>>>
>>>>> On Tuesday, April 26, 2016 at 7:18:55 PM UTC-4, Norbert Lange wrote:
>>>>>>
>>>>>> There seem to be some arcane rules on how to iterate over some
>>>>>> builtin Groovy/Java Types within a sandbox. I haven`t found a way
>>>>>> that
>>>>>> works without manually allowing the function.
>>>>>
>>>>>
>>>>> Which methods did you need to approve? We can easily add them to the
>>>>> default whitelist in the Script Security plugin. But anyway
>>>>>
>>>>> The map`s each (at least)
>>>>
>>>>
>>>>>
>>>>>> 2) Serialization issues for iterators.
>>>>>>
>>>>>
>>>>> `for (x : list) {…}` works as of `workflow-cps` 2.x. Other iterators
>>>>> do not yet work (outside a `@NonCPS` method). Probably fixing them is not
>>>>> hard, just have not gotten to it yet
>>>>>
>>>>
>>>> Yes, these issues I can very likely work around. For someone who is new
>>>> to Groovy and Jenkins sandboxing, a list of preferred methods would be very
>>>> welcome (the examples from the workflow libs are rather simple). There are
>>>> atleast 3 different ways to iterate over containers, and several variations
>>>> of those for maps.
>>>>
>>>>
>>>>>
>>>>>
>>>>>>
>>>>>> take the createDList
>>>>>> which seems to execute the code differently (throws errrors, need to
>>>>>> define a explicit variable)
>>>>>>
>>>>>
>>>>> Not sure what this is about. If you find something you think should
>>>>> work which does not work in a minimal reproducible script, please file a
>>>>> bug report for it.
>>>>>
>>>> Where? Is that a feature-not-bug of Groovy, an issue in Jenkins or some
>>>> Plugin? I was hoping for some feedback as I am not proficient in either of
>>>> those to pinpoint issues.
>>>> The code above should be able to explain the issue, the exact same
>>>> method body in the node scope works fine, the call will result in some
>>>> message about "it not defined". Similary there seems some issues with name
>>>> clashes (if variables in functions are named like those in the node scope),
>>>> but it mightve been some flukes during trial-and-error
>>>>
>>>>
>>>>>
>>>>>
>>>>>>
>>>>>> Are variables from Closures global?
>>>>>>
>>>>>
>>>>> Local `def` variables in a closure? Not sure what you are referring to
>>>>> here.
>>>>>
>>>> See last point, and the code were I can access the it variable after
>>>> the closure were its used (Noted with "// Weird !" )
>>>>
>>>>>
>>>>> The main problem you are presumably hitting is the well-known
>>>>> JENKINS-26481 <https://issues.jenkins-ci.org/browse/JENKINS-26481>.
>>>>> We are working on a fix, but in the meantime, do not use any method built
>>>>> into Groovy which takes a closure argument, such as `list.each {x -> …}` 
>>>>> or
>>>>> `someText.eachLine {line -> …}`. Rather use a Java-style loop. (To be on
>>>>> the safe side, also avoid iterators, meaning use a C- or JDK 1.4-style 
>>>>> loop
>>>>> with an index.)
>>>>>
>>>> Could you please post me the preferable code for iterating a map in
>>>> this way? (Not sure I fully understand the bug )
>>>>
>>>>
>>>>> Incidentally `it` does not currently work in closures as noted in
>>>>> JENKINS-33468
>>>>> <https://www.google.com/url?q=https%3A%2F%2Fissues.jenkins-ci.org%2Fbrowse%2FJENKINS-33468&sa=D&sntz=1&usg=AFQjCNHCpckU-LtRXqq1a2tEPCzNrYhPTw>;
>>>>> use an explicit parameter name instead.
>>>>>
>>>> That seems to be one of the issues I am fighting with, and might be
>>>> that the supposed name-clashes came from unfocused variations of the code.
>>>> Strangely it does seem to somewhat work in the node body?
>>>>
>>>> Kind Regards,
>>>> Norbert
>>>>
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-- 

Patrick Wolf
Sr. Product Manager
CloudBees

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