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From Raul Kripalani <ra...@apache.org>
Subject Re: New module for C++/.Net integration.
Date Sat, 22 Aug 2015 12:28:58 GMT
On Fri, Aug 21, 2015 at 4:47 PM, Vladimir Ozerov <vozerov@gridgain.com>

> 1) We have 4 distinct parts: Java supporting code, common CPP/JNI layer
> which depends on Java, .Net implementation which depends on Java and JNI,
> CPP platform implementation which depends on Java and JNI. And very often
> it is necessary to update several of  them in scope of a single ticket. It
> will be a nightmare to update them in different repos - tons of patches
> and/or pull requests.

I see what you mean; if I understood, it's a matter of (1) convenience and
(2) being able to push commits that contain all changes to support a given
functionality across all platforms.

Have you considered Git Subtrees? With that approach I think you can get
the best of both worlds (separation in different Git repos, and mapping of
"satellite" repos into directories of a core repo). In my mind, we would be
having 3 repos:

* Repo "ignite" => Ignite (Java) + CPP/JNI layer. This is essentially
Ignite + the contract and interop layer for other languages to leverage
* Repo "ignite-cpp" => platform implementation for Ignite in C++.
* Repo "ignite-dotnet" =>  platform implementation for .NET.

The ignite repo would map the ignite-cpp and ignite-dotnet repos into the
source tree via git subtree.


* Folks only wanting to interact only with ignite's Java code would not
need to fetch the ignite-cpp and ignite-dotnet repos. Most people will fall
in this category, I assume.
* Git subtree automatically takes care of splitting commits that span
multiple repos, for them to be applied individually to each repo.
* Tagging commits with JIRA ticket ids allow us to group commits across a
number of repos under the "umbrella" of a single functionality.

For those people who are not familiar with Git subtrees, this is a nice
walkthrough: [1].

[1] https://medium.com/@v/git-subtrees-a-tutorial-6ff568381844

*Raúl Kripalani*
Apache Camel PMC Member & Committer | Enterprise Architect, Open Source
Integration specialist
http://about.me/raulkripalani | http://www.linkedin.com/in/raulkripalani
http://blog.raulkr.net | twitter: @raulvk

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