Git
===

# Subtree Example

1.  Add sub-project as remote
    ```bash
    git remote add -f RemoteName RemoteUrl
    ```

2.  Run `git subtree` command
    ```bash
    git subtree add --prefix Path/To/Put/Code NameOfRemote master --squash
    ```

3.  Pull subtree as needed
    ```bash
    git fetch NameOfRemote master
    git subtree pull --prefix Path/To/Put/Code NameOfRemote master --squash
    ```

## Reference

* http://blogs.atlassian.com/2013/05/alternatives-to-git-submodule-git-subtree

# Create a branch without a parent

Very useful when you are updating a project that you are rewriting. For example, say you are using semantic versioning and are wanting to start a new major version.

```bash
git checkout --orphan BRANCH
```

# Delete All Branches that have been merged

Great for cleaning up local branches that aren't being used any more.

```bash
git checkout master
git branch --merged | grep -v "\*" | xargs -n 1 git branch -d
```

# Ignore changes to a file that is being tracked

Ignore:

```bash
git update-index --assume-unchanged [directory|file]
```

Unignore:

```bash
git update-index --no-assume-unchanged [directory|file]
```

# How to ignore dirty submodules

Edit your ``.git/config`` and add ``ignore = dirty``.

```text
[submodule "path/to/submodule"]
    path = path/to/submodule
    url = git://github.com/username/repo.git
    ignore = dirty
```

# Clone a repo and give name other than origin

```bash
git clone -o upstream https://repo.git
```