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This page describes the branching model we want to apply for development at Magnolia.

The model

The model is basically the same as described in a blog post.

Differences

  • We'll not use hotfix branches
  • We'll use the term develop branch (not integration branch)

Continuous integration (Hudson)

The following branches will have a continuous integration job running

  • master
  • release branches
  • develop

Build (maven)

  • same snapshot version (develop and master)?
    • see open Issues

Maintenance

  • no changes
  • no hot fix branches (for the moment)

Feature branches

  • remove them after the final merge
  • list of feature branches --> things we are actively working on or are waiting
  • how to remove the branches?

Rules

  • central repo
    • no feature branches
  • merging at the end of the sprint (develop -> master)
    • scrum masters
  • on develop branch
    • revert immediately as soon it fails

Open Issues

Sharing feature branches [Daniel]

  • how to share them without having them on the central repo
    • ppl could define remote repos on others computers
      • spider net! - over time every dev will work with every other...
      • no out-of-the-box backup
      • hard to track what's being worked on
    • According to Greg nothing speaks against having them in central repo!

Version conflicts for snapshots [Daniel/Gregory]

  • do we need a special version?
  • other repository?
  • dev classifier?
  • something has to guarantee that not the wrong versions are used on the master!

Continuous integration

  • Need frequent (daily) merge back to development branch
  • conflicts will otherwise be hit too late

Branching effort

Creating branches and merging is cheap in git - but if you have to touch lot's of modules it might no longer be the case

  • As we almost have a one git-repo per module setup feature branching might involve quite an effort in maintaining branches
    • e.g. for metadata-as-mixin we have to create (later merge then delete) branches for magnolia_main, magnolia_ui, ce-bundle, stk?, etk?, demo-project?,...

Links

By the way: feature branching vs. continuous integration has heavily been debated - mainly because of Martin Fowler's vote to not go for feature branches. Here's a bunch of links around it:

 

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