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Hi,

== Background
I have been maintaining ruby_1_9_1 and ruby_1_9_2 branch.
Ruby 1.9 is now stable as Ruby 1.8 was, but it has not yet reached to
the bugless nirvana. So Ruby 1.9 needs continuous maintenance.

But actually ruby_1_9_1 is no longer well-maintained. My backports to
ruby_1_9_? tend to be late. There is a bottle-neck.

The bottle-neck is review process for commits in trunk.
A few bug is branch-specific. Most of bugs in Ruby 1.9.x reproduce
with trunk too. So I rarely need to write a branch specific patch.
Just backporting from trunk fixes most of bugs in Ruby 1.9.x.
But I need to read a commit carefully and run unit tests before
backport the commit. This review process takes really really long.
That's why patch level releases have been late.

== Proposal
Let's parallelize the bottle-neck.
Review and tests are necessary for stability and compatibility of
released branches but these processes can be parallelized.
I propose the following process:

* A committer who fixed a bug in trunk should also check if the bug
  reproduces with other active branches. If reproduces, (s)he should
  create a backport request on the Redmine.
  * Or anyone who want us to backport a commit in trunk can create a
    backport request.
* Another committer review the request. This reviewer checks if this
  commit is good enough and backport it to the older branch.
* Any committer who thinks the backport breaks compatiblity can revert
  it.
  * Eventually the maintainer of the branch decides to revert or not.

CI and a new Redmine plugin can help this process.
* Automatic request triggered by commit message?

And the branch maintainer can have time to plan the next patch-level
release.

- -- 
Regards,
Yuki Yugui Sonoda <yugui / yugui.jp>
http://yugui.jp
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