Great we have found several schema.org types là gì năm 2024

This model was conceived in 2010, now more than 10 years ago, and not very long after Git itself came into being. In those 10 years, git-flow (the branching model laid out in this article) has become hugely popular in many a software team to the point where people have started treating it like a standard of sorts — but unfortunately also as a dogma or panacea.

During those 10 years, Git itself has taken the world by a storm, and the most popular type of software that is being developed with Git is shifting more towards web apps — at least in my filter bubble. Web apps are typically continuously delivered, not rolled back, and you don't have to support multiple versions of the software running in the wild.

This is not the class of software that I had in mind when I wrote the blog post 10 years ago. If your team is doing continuous delivery of software, I would suggest to adopt a much simpler workflow (like GitHub flow) instead of trying to shoehorn git-flow into your team.

If, however, you are building software that is explicitly versioned, or if you need to support multiple versions of your software in the wild, then git-flow may still be as good of a fit to your team as it has been to people in the last 10 years. In that case, please read on.

To conclude, always remember that panaceas don't exist. Consider your own context. Don't be hating. Decide for yourself.

In this post I present the development model that I’ve introduced for some of my projects (both at work and private) about a year ago, and which has turned out to be very successful. I’ve been meaning to write about it for a while now, but I’ve never really found the time to do so thoroughly, until now. I won’t talk about any of the projects’ details, merely about the branching strategy and release management.

Great we have found several schema.org types là gì năm 2024

Why git?

For a thorough discussion on the pros and cons of Git compared to centralized source code control systems, see the web. There are plenty of flame wars going on there. As a developer, I prefer Git above all other tools around today. Git really changed the way developers think of merging and branching. From the classic CVS/Subversion world I came from, merging/branching has always been considered a bit scary (“beware of merge conflicts, they bite you!”) and something you only do every once in a while.

But with Git, these actions are extremely cheap and simple, and they are considered one of the core parts of your daily workflow, really. For example, in CVS/Subversion books, branching and merging is first discussed in the later chapters (for advanced users), while in every Git book, it’s already covered in chapter 3 (basics).

As a consequence of its simplicity and repetitive nature, branching and merging are no longer something to be afraid of. Version control tools are supposed to assist in branching/merging more than anything else.

Enough about the tools, let’s head onto the development model. The model that I’m going to present here is essentially no more than a set of procedures that every team member has to follow in order to come to a managed software development process.

Decentralized but centralized

The repository setup that we use and that works well with this branching model, is that with a central “truth” repo. Note that this repo is only considered to be the central one (since Git is a DVCS, there is no such thing as a central repo at a technical level). We will refer to this repo as

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

1, since this name is familiar to all Git users.

Great we have found several schema.org types là gì năm 2024

Each developer pulls and pushes to origin. But besides the centralized push-pull relationships, each developer may also pull changes from other peers to form sub teams. For example, this might be useful to work together with two or more developers on a big new feature, before pushing the work in progress to

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

1 prematurely. In the figure above, there are subteams of Alice and Bob, Alice and David, and Clair and David.

Technically, this means nothing more than that Alice has defined a Git remote, named

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

3, pointing to Bob’s repository, and vice versa.

The main branches

Great we have found several schema.org types là gì năm 2024

At the core, the development model is greatly inspired by existing models out there. The central repo holds two main branches with an infinite lifetime:

  • $ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop 4
  • $ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop 5

The

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 branch at

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

1 should be familiar to every Git user. Parallel to the

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 branch, another branch exists called

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5.

We consider

$ git checkout -b release-1.2 develop Switched to a new branch "release-1.2" $ ./bump-version.sh 1.2 Files modified successfully, version bumped to 1.2. $ git commit -a -m "Bumped version number to 1.2" [release-1.2 74d9424] Bumped version number to 1.2 1 files changed, 1 insertions(+), 1 deletions(-)

0 to be the main branch where the source code of

$ git checkout -b release-1.2 develop Switched to a new branch "release-1.2" $ ./bump-version.sh 1.2 Files modified successfully, version bumped to 1.2. $ git commit -a -m "Bumped version number to 1.2" [release-1.2 74d9424] Bumped version number to 1.2 1 files changed, 1 insertions(+), 1 deletions(-)

1 always reflects a production-ready state.

We consider

$ git checkout -b release-1.2 develop Switched to a new branch "release-1.2" $ ./bump-version.sh 1.2 Files modified successfully, version bumped to 1.2. $ git commit -a -m "Bumped version number to 1.2" [release-1.2 74d9424] Bumped version number to 1.2 1 files changed, 1 insertions(+), 1 deletions(-)

2 to be the main branch where the source code of

$ git checkout -b release-1.2 develop Switched to a new branch "release-1.2" $ ./bump-version.sh 1.2 Files modified successfully, version bumped to 1.2. $ git commit -a -m "Bumped version number to 1.2" [release-1.2 74d9424] Bumped version number to 1.2 1 files changed, 1 insertions(+), 1 deletions(-)

1 always reflects a state with the latest delivered development changes for the next release. Some would call this the “integration branch”. This is where any automatic nightly builds are built from.

When the source code in the

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 branch reaches a stable point and is ready to be released, all of the changes should be merged back into

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 somehow and then tagged with a release number. How this is done in detail will be discussed further on.

Therefore, each time when changes are merged back into

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4, this is a new production release by definition. We tend to be very strict at this, so that theoretically, we could use a Git hook script to automatically build and roll-out our software to our production servers everytime there was a commit on

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4.

Supporting branches

Next to the main branches

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 and

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5, our development model uses a variety of supporting branches to aid parallel development between team members, ease tracking of features, prepare for production releases and to assist in quickly fixing live production problems. Unlike the main branches, these branches always have a limited life time, since they will be removed eventually.

The different types of branches we may use are:

  • Feature branches
  • Release branches
  • Hotfix branches

Each of these branches have a specific purpose and are bound to strict rules as to which branches may be their originating branch and which branches must be their merge targets. We will walk through them in a minute.

By no means are these branches “special” from a technical perspective. The branch types are categorized by how we use them. They are of course plain old Git branches.

Feature branches

Great we have found several schema.org types là gì năm 2024

May branch off from:

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 Must merge back into:

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 Branch naming convention: anything except

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4,

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5,

$ git checkout master Switched to branch 'master' $ git merge --no-ff release-1.2 Merge made by recursive. (Summary of changes) $ git tag -a 1.2

4, or

$ git checkout master Switched to branch 'master' $ git merge --no-ff release-1.2 Merge made by recursive. (Summary of changes) $ git tag -a 1.2

5

Feature branches (or sometimes called topic branches) are used to develop new features for the upcoming or a distant future release. When starting development of a feature, the target release in which this feature will be incorporated may well be unknown at that point. The essence of a feature branch is that it exists as long as the feature is in development, but will eventually be merged back into

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 (to definitely add the new feature to the upcoming release) or discarded (in case of a disappointing experiment).

Feature branches typically exist in developer repos only, not in

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

1.

Creating a feature branch

When starting work on a new feature, branch off from the

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 branch.

$ git checkout -b myfeature develop Switched to a new branch "myfeature"

Incorporating a finished feature on develop

Finished features may be merged into the

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 branch to definitely add them to the upcoming release:

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

The

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff release-1.2 Merge made by recursive. (Summary of changes)

0 flag causes the merge to always create a new commit object, even if the merge could be performed with a fast-forward. This avoids losing information about the historical existence of a feature branch and groups together all commits that together added the feature. Compare:

Great we have found several schema.org types là gì năm 2024

In the latter case, it is impossible to see from the Git history which of the commit objects together have implemented a feature—you would have to manually read all the log messages. Reverting a whole feature (i.e. a group of commits), is a true headache in the latter situation, whereas it is easily done if the

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff release-1.2 Merge made by recursive. (Summary of changes)

0 flag was used.

Yes, it will create a few more (empty) commit objects, but the gain is much bigger than the cost.

Release branches

May branch off from:

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 Must merge back into:

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 and

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 Branch naming convention:

$ git checkout master Switched to branch 'master' $ git merge --no-ff release-1.2 Merge made by recursive. (Summary of changes) $ git tag -a 1.2

4

Release branches support preparation of a new production release. They allow for last-minute dotting of i’s and crossing t’s. Furthermore, they allow for minor bug fixes and preparing meta-data for a release (version number, build dates, etc.). By doing all of this work on a release branch, the

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 branch is cleared to receive features for the next big release.

The key moment to branch off a new release branch from

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 is when develop (almost) reflects the desired state of the new release. At least all features that are targeted for the release-to-be-built must be merged in to

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 at this point in time. All features targeted at future releases may not—they must wait until after the release branch is branched off.

It is exactly at the start of a release branch that the upcoming release gets assigned a version number—not any earlier. Up until that moment, the

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 branch reflected changes for the “next release”, but it is unclear whether that “next release” will eventually become 0.3 or 1.0, until the release branch is started. That decision is made on the start of the release branch and is carried out by the project’s rules on version number bumping.

Creating a release branch

Release branches are created from the

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 branch. For example, say version 1.1.5 is the current production release and we have a big release coming up. The state of

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 is ready for the “next release” and we have decided that this will become version 1.2 (rather than 1.1.6 or 2.0). So we branch off and give the release branch a name reflecting the new version number:

$ git checkout -b release-1.2 develop Switched to a new branch "release-1.2" $ ./bump-version.sh 1.2 Files modified successfully, version bumped to 1.2. $ git commit -a -m "Bumped version number to 1.2" [release-1.2 74d9424] Bumped version number to 1.2 1 files changed, 1 insertions(+), 1 deletions(-)

After creating a new branch and switching to it, we bump the version number. Here,

$ git branch -d release-1.2 Deleted branch release-1.2 (was ff452fe).

2 is a fictional shell script that changes some files in the working copy to reflect the new version. (This can of course be a manual change—the point being that some files change.) Then, the bumped version number is committed.

This new branch may exist there for a while, until the release may be rolled out definitely. During that time, bug fixes may be applied in this branch (rather than on the

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 branch). Adding large new features here is strictly prohibited. They must be merged into

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5, and therefore, wait for the next big release.

Finishing a release branch

When the state of the release branch is ready to become a real release, some actions need to be carried out. First, the release branch is merged into

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 (since every commit on

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 is a new release by definition, remember). Next, that commit on

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 must be tagged for easy future reference to this historical version. Finally, the changes made on the release branch need to be merged back into

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5, so that future releases also contain these bug fixes.

The first two steps in Git:

$ git checkout master Switched to branch 'master' $ git merge --no-ff release-1.2 Merge made by recursive. (Summary of changes) $ git tag -a 1.2

The release is now done, and tagged for future reference.

Edit: You might as well want to use the

$ git branch -d release-1.2 Deleted branch release-1.2 (was ff452fe).

9 or

$ git checkout -b hotfix-1.2.1 master Switched to a new branch "hotfix-1.2.1" $ ./bump-version.sh 1.2.1 Files modified successfully, version bumped to 1.2.1. $ git commit -a -m "Bumped version number to 1.2.1" [hotfix-1.2.1 41e61bb] Bumped version number to 1.2.1 1 files changed, 1 insertions(+), 1 deletions(-)

0 flags to sign your tag cryptographically.

To keep the changes made in the release branch, we need to merge those back into

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5, though. In Git:

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff release-1.2 Merge made by recursive. (Summary of changes)

This step may well lead to a merge conflict (probably even, since we have changed the version number). If so, fix it and commit.

Now we are really done and the release branch may be removed, since we don’t need it anymore:

$ git branch -d release-1.2 Deleted branch release-1.2 (was ff452fe).

Hotfix branches

Great we have found several schema.org types là gì năm 2024

May branch off from:

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 Must merge back into:

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 and

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 Branch naming convention:

$ git checkout master Switched to branch 'master' $ git merge --no-ff release-1.2 Merge made by recursive. (Summary of changes) $ git tag -a 1.2

5

Hotfix branches are very much like release branches in that they are also meant to prepare for a new production release, albeit unplanned. They arise from the necessity to act immediately upon an undesired state of a live production version. When a critical bug in a production version must be resolved immediately, a hotfix branch may be branched off from the corresponding tag on the master branch that marks the production version.

The essence is that work of team members (on the

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 branch) can continue, while another person is preparing a quick production fix.

Creating the hotfix branch

Hotfix branches are created from the

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 branch. For example, say version 1.2 is the current production release running live and causing troubles due to a severe bug. But changes on

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 are yet unstable. We may then branch off a hotfix branch and start fixing the problem:

$ git checkout -b hotfix-1.2.1 master Switched to a new branch "hotfix-1.2.1" $ ./bump-version.sh 1.2.1 Files modified successfully, version bumped to 1.2.1. $ git commit -a -m "Bumped version number to 1.2.1" [hotfix-1.2.1 41e61bb] Bumped version number to 1.2.1 1 files changed, 1 insertions(+), 1 deletions(-)

Don’t forget to bump the version number after branching off!

Then, fix the bug and commit the fix in one or more separate commits.

$ git commit -m "Fixed severe production problem" [hotfix-1.2.1 abbe5d6] Fixed severe production problem 5 files changed, 32 insertions(+), 17 deletions(-)

Finishing a hotfix branch

When finished, the bugfix needs to be merged back into

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4, but also needs to be merged back into

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5, in order to safeguard that the bugfix is included in the next release as well. This is completely similar to how release branches are finished.

First, update

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

4 and tag the release.

$ git checkout master Switched to branch 'master' $ git merge --no-ff hotfix-1.2.1 Merge made by recursive. (Summary of changes) $ git tag -a 1.2.1

Edit: You might as well want to use the

$ git branch -d release-1.2 Deleted branch release-1.2 (was ff452fe).

9 or

$ git checkout -b hotfix-1.2.1 master Switched to a new branch "hotfix-1.2.1" $ ./bump-version.sh 1.2.1 Files modified successfully, version bumped to 1.2.1. $ git commit -a -m "Bumped version number to 1.2.1" [hotfix-1.2.1 41e61bb] Bumped version number to 1.2.1 1 files changed, 1 insertions(+), 1 deletions(-)

0 flags to sign your tag cryptographically.

Next, include the bugfix in

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5, too:

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff hotfix-1.2.1 Merge made by recursive. (Summary of changes)

The one exception to the rule here is that, when a release branch currently exists, the hotfix changes need to be merged into that release branch, instead of

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5. Back-merging the bugfix into the release branch will eventually result in the bugfix being merged into

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 too, when the release branch is finished. (If work in

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 immediately requires this bugfix and cannot wait for the release branch to be finished, you may safely merge the bugfix into

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

5 now already as well.)

Finally, remove the temporary branch:

$ git checkout develop Switched to branch 'develop' $ git merge --no-ff myfeature Updating ea1b82a..05e9557 (Summary of changes) $ git branch -d myfeature Deleted branch myfeature (was 05e9557). $ git push origin develop

0

Summary

While there is nothing really shocking new to this branching model, the “big picture” figure that this post began with has turned out to be tremendously useful in our projects. It forms an elegant mental model that is easy to comprehend and allows team members to develop a shared understanding of the branching and releasing processes.

A high-quality PDF version of the figure is provided here. Go ahead and hang it on the wall for quick reference at any time.

Update: And for anyone who requested it: here’s the gitflow-model.src.key of the main diagram image (Apple Keynote).