This is fair; no problem. Based on your list, I certainly agree that #3 and #4 
are complications best not dealt with :) 

--Misagh

----- Original Message -----
> From: "Francesco Chicchiriccò" <[email protected]>
> To: "dev" <[email protected]>
> Sent: Wednesday, September 25, 2019 1:50:24 PM
> Subject: Re: [DISCUSS] Enabling Apache Maven wrapper

> On 25/09/19 10:05, Misagh Moayyed wrote:
>> Hello all,
>>
>> I have proposed a pull request [1] to enable the maven wrapper plugin for
>> Syncope. This is a plugin that allows one to build and run Syncope from 
>> source
>> without having to install Maven locally. It's able to download and configure
>> the appropriate maven version automatically, and then proceeds as if it was
>> locally installed and available.
>>
>> There are a number of advantages to using the wrapper:
>>
>> - Contributors to Syncope do not have to have Maven downloaded/installed
>> locally, though nothing would prevent them from doing so.
>> - This should also prevent conflicts by allowing usage a specific install of
>> maven for Syncope, in case one might need different maven versions on their
>> system for different projects, etc.
>> - The wrapper makes sure the correct version of maven is downloaded and
>> installed, removing potential confusing around "If I do install maven 
>> locally,
>> what version of Maven do I need?"
>> - The maven version is controlled by the project for CI tests, and not by 
>> the CI
>> system itself, which is useful in case CI decides to change/update versions 
>> or
>> goes outdated for any reason.
>> - The maintenance and overhead of the change is very minimal where future
>> changes to the maven version are controlled with a simple properties file.
>>
>> How do others feel about this change?
> Hi Misagh,
> thanks for bringing this to discussion.
> 
> Honestly, I don't see much value added by this:
> 
> 1. Syncope does not simply require "a specific Maven version"; rather, we run
> the maven-enforcer-plugin as part of the build, which checks Maven version is
> >= 3.50 and JDK version
> 
> 2. We've never had troubles with CIs due to Maven version
> 
> 3. Apache RAT analysis has failed on your PR [3], and I suspect this is 
> because
> of non-compliant [4] or missing [5] license headers - I am wondering whether
> these can be changed, or we are not allowed simply because we are importing
> source files from a different entity than ASF
> 
> 4. We would be adding binary files [6] to our source tree; this would imply
> changing our root LICENSE / NOTICE files + adjusting the source package
> management during release process
> 
> 5. I haven't made an extensive search, but I could not find any usage of Maven
> wrapper in any of the ASF projects I am involved in
> 
> 6. <hyperbolic_mode>Why limit to Maven? Why not bundling JDK? Or operating
> system?</hyperbolic_mode>
> 
> Summarizing: I don't find enough reasons to be -1 against such proposed 
> change,
> but I would rather avoid the amount of troubles it brings (especially for
> releases), as I see the trade-off with benefits extremely low.
> 
> Regards.
> 
>> [1] https://github.com/apache/syncope/pull/122
> [2] https://github.com/apache/syncope/blob/master/pom.xml#L2123-L2145
> [3] https://travis-ci.org/apache/syncope/jobs/588979502
> [4]
> https://github.com/apache/syncope/pull/122/files#diff-59a310fc0b8358d0c91a717f18f7cfedR1-R15
> [5]
> https://github.com/apache/syncope/pull/122/files#diff-de2bfeb3d4c0f4a0b3af8d261a26a21aR1
> [6]
> https://github.com/apache/syncope/pull/122/files#diff-2e0bce82bce59a26bc532fbc92db892e
> 
> --
> Francesco Chicchiriccò
> 
> Tirasa - Open Source Excellence
> http://www.tirasa.net/
> 
> Member at The Apache Software Foundation
> Syncope, Cocoon, Olingo, CXF, OpenJPA, PonyMail
> http://home.apache.org/~ilgrosso/

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