# Git Flow

We use the `develop/master` variation of the [OneFlow](https://www.endoflineblog.com/oneflow-a-git-branching-model-and-workflow) git flow

## Add New Features
We use feature (topic) branches to implement new features

1. Pull the latest develop 
```bash
git checkout develop
git pull
```
1. Create your feature branch
```bash
git checkout -b feature/feature1
```
1. Add, modify or delete the necessary files to add your new feature
1. Update the [change log](../../change-log) (`docs/change-log.md`)
2. Stage and commit your changes using VS Code git GUI or the following commands
```bash
git add modified-file1 modified-file2
git commit -m "Add my new feature" # use a concise description
```
1. Integrate your new feature to `develop`

    === "Internal Developer"
        You are an internal developer if you have writing permissions to the repository.
        
        Most feature branches are never pushed to the repo, only do so if you expect that its development will take days (to avoid losing your work if you computer is damaged). Otherwise follow the following instructions to locally rebase your feature branch into `develop` and push those rebased changes online.

        ```bash
        git checkout feature/feature1
        git fetch origin develop
        git rebase -i develop
        git checkout develop
        git merge --no-ff feature/feature1 # (use the default merge message)
        git push origin develop
        git branch -d feature/feature1
        ```

    === "External Developer"
        You are an external developer if you do NOT have writing permissions to the repository.

        Push your feature branch online
        ```bash
        git push --set-upstream origin feature/external-test
        ```
        Then open a pull request to the `develop` branch using Github's GUI

## Release a New Version

1. Pull the latest develop 
```bash
git checkout develop
git pull
```
1. Create a new release branch
```bash
git describe --abbrev=0 --tags # Bump the release (0.1.0 to 0.2.0 => NEW_HOTFIX)
git checkout -b release/v[NEW_RELEASE] develop
```
1. Add new tag
```bash
git tag v[NEW_RELEASE]
```
1. Merge and push the release branch
```bash
git checkout develop
git merge release/v[NEW_RELEASE]
git push --tags origin develop
git branch -d release/v[NEW_RELEASE]
```
1. Fast-forward master
```
git checkout master
git merge --ff-only develop
git push
```
1. Go to [GitHub](https://github.com/carissalow/rapids/tags) and create a new release based on the newest tag `v[NEW_RELEASE]` (remember to add the change log)

## Release a Hotfix
1. Pull the latest master
```bash
git checkout master
git pull
```
1. Start a hotfix branch
```bash
git describe --abbrev=0 --tags # Bump the hotfix (0.1.0 to 0.1.1 => NEW_HOTFIX)
git checkout -b hotfix/v[NEW_HOTFIX] master
```
1. Fix whatever needs to be fixed
1. Update the change log
1. Tag and merge the hotfix
```bash
git tag v[NEW_HOTFIX]
git checkout develop
git merge hotfix/v[NEW_HOTFIX]
git push --tags origin develop
git branch -d hotfix/v[NEW_HOTFIX]
```
1. Fast-forward master
```
git checkout master
git merge --ff-only v[NEW_HOTFIX]
git push
```
1. Go to [GitHub](https://github.com/carissalow/rapids/tags) and create a new release based on the newest tag `v[NEW_HOTFIX]` (remember to add the change log)
