Provided by: libdancer-perl_1.3521+dfsg-1_all 
NAME
Dancer::Development::Integration - guide for Dancer's core-team members
VERSION
version 1.3521
DESCRIPTION
This documentation describes the procedure used for integrators to review and merge
contributions sent via pull-requests.
Every core-team member should read and apply the procedures described here. This will
allow for a better history and more consistency in our ways of handling the (increasing
number!) of pull requests.
TERMS
We will first define the most important terms used in this documentation:
• PR
Acronym for Pull Request
• Contributor
A GitHub user who had forked and cloned the official Dancer's repo, and who has sent a
PR.
• Integration branch
This branch is the branch used to merge all contributions. This is a git-flow
convention. In Dancer, our integration branch is "devel".
As explained in Dancer::Development, every PR should be based on the integration
branch. If not, this is enough to refuse the PR (it makes the life of the integrator
much harder if this is not the case).
• Integrator
A member of Dancer's core-team who is responsible for reviewing and either rejecting
the PR, or merging it into the integration branch.
PROCEDURES
Processing a Pull Request
This procedure describes how an integrator should process a PR.
Let's say the user $user has sent a PR, he has followed the instructions described in
Dancer::Development so his work is based on the integration branch ("devel").
All the procedure described here is designed to avoid unnecessary recursive-merge, in
order to keep a clean and flat history in the integration branch.
Of course, we could just pull from $user into our "devel" branch, but this would shift the
history because of recursive merge, most of the time.
To avoid that, we're going to pull the commits of $user into a temporary branch, and then
cherry-pick the commits we want.
In order to have a clean history, like the one we got with git-flow when working on a
feature, we're going to do that in a topic branch, named "review/$user". Then, this branch
will be merged into "devel" and we will just have to drop it.
First, we make sure we are in sync with "origin/devel"
git checkout devel
git pull origin devel
Then, from that branch we create a temp sandbox
git checkout -b temp
We pull here from $user
git pull <user repo> <pr/branch>
Here, either the pull was run as a fast-forward or as a recursive merge. If we have a FF,
we can forget about the temp branch and do the pull directly in "devel". If not, we'll
have to cherry-pick the commits by hand.
From devel, we first create the final "review" branch:
git checkout devel
git checkout -b review/$user
Then we cherry-pick all the commits we want. To know them, we just have to go into temp
and inspect the history (with "git log").
When we have the list of commits we want:
for commit in C1 C2 C3 ... CN
do
git cherry-pick $commit
done
(Another option is to use "git rebase -i" to manually select the list of commits to
cherry-pick/rebase.)
Then we can review the code, do whatever we want, maybe add some commits to change
something.
When we're happy with the change set, we can merge into devel:
git checkout devel
git merge --no-ff review/$user
Note the "--no-ff" switch is used to make sure we'll see a nice commit named "Merge branch
'review/$user' into devel". This is on purpose and mimic the behaviour of git-flow.
Your local "devel" branch is now merged, and can be pushed to the remote.
$ git push origin devel
RELEASE CYCLES
We have one main release cycle. This is the release cycle based on the devel branch. We
use this branch to build new releases, with new stuff all the new shiny commits we want.
Those release are built with git-flow (with "git-flow release") and are then uploaded to
CPAN.
Since Dancer 1.2, we also have another parallel release cycle which is what we call the
frozen branch. It's a maintenance-only release cycle. That branch is created from the tag
of the first release of a stable version (namely a release series with an even minor
number).
This branch must be used only for bug-fixing the stable releases. Nothing new should occur
in that branch.
Let's take an example with Dancer 1.2003 and Dancer 1.3002.
• Dancer 1.2003 is the last stable release of Dancer. Its codebase is handled in the
frozen branch, that has been created from the tag 1.2000.
• Dancer 1.3002 is the last release of Dancer. As it belongs to a development series, it
can provide new features, code refactoring and deprecations. Its codebase is handled
by the integration branch, "devel".
• When a bug is found in 1.2xxx, it's fixed in the "frozen" branch, and a new release is
built from here and then uploaded to CPAN.
• Whenever the team wants to, they can release new versions of 1.3xxx from the devel
branch, using "git-flow release start".
• When the team finds that the current state of devel (namely, the last version of
1.3xxx) is stable and mature enough. They can decide it will be the new stable
version.
Then, a release 1.4000_01 is built from devel, an upload is done to CPAN, and when
ready, the 1.40001 can be uploaded the same way.
From that moment, the master branch is merged into frozen in order to be able to
hotfix the frozen branch in the future.
It's now possible for the team to continue working on new stuff in devel, bumping the
version number to 1.5000_01
AUTHOR
This documentation has been written by Alexis Sukrieh "<sukria@sukria.net>".
AUTHOR
Dancer Core Developers
COPYRIGHT AND LICENSE
This software is copyright (c) 2010 by Alexis Sukrieh.
This is free software; you can redistribute it and/or modify it under the same terms as
the Perl 5 programming language system itself.