debian-mirror-gitlab/doc/university/training/user_training.md

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---
comments: false
---
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# GitLab Git Workshop
---
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## Agenda
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1. Brief history of Git.
1. GitLab walkthrough.
1. Configure your environment.
1. Workshop.
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---
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## Git introduction
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<https://git-scm.com/about>
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- Distributed version control.
- Does not rely on connection to a central server.
- Many copies of the complete history.
- Powerful branching and merging.
- Adapts to nearly any workflow.
- Fast, reliable and stable file format.
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---
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## Help!
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Use the tools at your disposal when you get stuck.
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- Use '`git help <command>`' command.
- Use Google.
- Read documentation at <https://git-scm.com>.
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---
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## GitLab Walkthrough
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![fit](logo.png)
---
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## Configure your environment
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- Windows: Install 'Git for Windows'
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> <https://git-for-windows.github.io>
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- Mac: Type '`git`' in the Terminal application.
> If it's not installed, it will prompt you to install it.
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- Debian: '`sudo apt-get install git-all`' or Red Hat '`sudo yum install git-all`'
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---
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## Git Workshop
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### Overview
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1. Configure Git.
1. Configure SSH Key.
1. Create a project.
1. Committing.
1. Feature branching.
1. Merge requests.
1. Feedback and Collaboration.
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---
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## Configure Git
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One-time configuration of the Git client:
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```sh
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git config --global user.name "Your Name"
git config --global user.email you@example.com
```
---
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## Configure SSH Key
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```sh
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ssh-keygen -t rsa -b 4096 -C "you@computer-name"
```
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```sh
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# You will be prompted for the following information. Press enter to accept the defaults. Defaults appear in parentheses.
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/you/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /Users/you/.ssh/id_rsa.
Your public key has been saved in /Users/you/.ssh/id_rsa.pub.
The key fingerprint is:
39:fc:ce:94:f4:09:13:95:64:9a:65:c1:de:05:4d:01 you@computer-name
```
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Copy your public key and add it to your GitLab profile:
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```sh
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cat ~/.ssh/id_rsa.pub
```
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```sh
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ssh-rsa AAAAB3NzaC1yc2EAAAADAQEL17Ufacg8cDhlQMS5NhV8z3GHZdhCrZbl4gz you@example.com
```
---
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## Create a project
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- Create a project in your user namespace.
- Choose to import from 'Any Repo by URL' and use <https://gitlab.com/gitlab-org/training-examples.git>.
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- Create a '`development`' or '`workspace`' directory in your home directory.
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- Clone the '`training-examples`' project.
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---
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## Commands (project)
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```sh
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mkdir ~/development
cd ~/development
-or-
mkdir ~/workspace
cd ~/workspace
git clone git@gitlab.example.com:<username>/training-examples.git
cd training-examples
```
---
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## Git concepts
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### Untracked files
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New files that Git has not been told to track previously.
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### Working area
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Files that have been modified but are not committed.
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### Staging area
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Modified files that have been marked to go in the next commit.
---
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## Committing
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1. Edit '`edit_this_file.rb`' in '`training-examples`'.
1. See it listed as a changed file (working area).
1. View the differences.
1. Stage the file.
1. Commit.
1. Push the commit to the remote.
1. View the git log.
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---
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## Commands (committing)
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```sh
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# Edit `edit_this_file.rb`
git status
git diff
git add <file>
git commit -m 'My change'
git push origin master
git log
```
---
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## Feature branching
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- Efficient parallel workflow for teams.
- Develop each feature in a branch.
- Keeps changes isolated.
- Consider a 1-to-1 link to issues.
- Push branches to the server frequently.
- Hint: This is a cheap backup for your work-in-progress code.
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---
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## Feature branching steps
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1. Create a new feature branch called 'squash_some_bugs'.
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1. Edit '`bugs.rb`' and remove all the bugs.
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1. Commit.
1. Push.
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---
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## Commands (feature branching)
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```sh
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git checkout -b squash_some_bugs
# Edit `bugs.rb`
git status
git add bugs.rb
git commit -m 'Fix some buggy code'
git push origin squash_some_bugs
```
---
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## Merge requests
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- When you want feedback create a merge request.
- Target is the default branch (usually master).
- Assign or mention the person you would like to review.
- Add 'WIP' to the title if it's a work in progress.
- When accepting, always delete the branch.
- Anyone can comment, not just the assignee.
- Push corrections to the same branch.
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---
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## Merge requests steps
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Create your first merge request:
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1. Use the blue button in the activity feed.
1. View the diff (changes) and leave a comment.
1. Push a new commit to the same branch.
1. Review the changes again and notice the update.
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---
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## Feedback and Collaboration
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- Merge requests are a time for feedback and collaboration.
- Giving feedback is hard.
- Be as kind as possible.
- Receiving feedback is hard.
- Be as receptive as possible.
- Feedback is about the best code, not the person. You are not your code.
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---
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## Feedback and Collaboration resources
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Review the Thoughtbot code-review guide for suggestions to follow when reviewing merge requests:
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<https://github.com/thoughtbot/guides/tree/master/code-review>.
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See GitLab merge requests for examples: <https://gitlab.com/gitlab-org/gitlab-ce/merge_requests>.
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---
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## Explore GitLab projects
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![fit](logo.png)
- Dashboard
- User Preferences
- ReadMe, Changelog, License shortcuts
- Issues
- Milestones and Labels
- Manage project members
- Project settings
---
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## Tags
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- Useful for marking deployments and releases.
- Annotated tags are an unchangeable part of Git history.
- Soft/lightweight tags can be set and removed at will.
- Many projects combine an annotated release tag with a stable branch.
- Consider setting deployment/release tags automatically.
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---
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## Tags steps
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1. Create a lightweight tag.
1. Create an annotated tag.
1. Push the tags to the remote repository.
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Additional resources: <http://git-scm.com/book/en/Git-Basics-Tagging>.
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---
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## Commands (tags)
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```sh
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git checkout master
# Lightweight tag
git tag my_lightweight_tag
# Annotated tag
git tag -a v1.0 -m Version 1.0
git tag
git push origin --tags
```
---
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## Merge conflicts
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- Happen often.
- Learning to fix conflicts is hard.
- Practice makes perfect.
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- Force push after fixing conflicts. Be careful!
---
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## Merge conflicts steps
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1. Checkout a new branch and edit `conflicts.rb`. Add 'Line4' and 'Line5'.
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1. Commit and push.
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1. Checkout master and edit `conflicts.rb`. Add 'Line6' and 'Line7' below 'Line3'.
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1. Commit and push to master.
1. Create a merge request.
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---
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## Merge conflicts commands
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After creating a merge request you should notice that conflicts exist. Resolve
the conflicts locally by rebasing.
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```sh
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git rebase master
# Fix conflicts by editing the files.
git add conflicts.rb
git commit -m 'Fix conflicts'
git rebase --continue
git push origin <branch> -f
```
---
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## Rebase with squash
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You may end up with a commit log that looks like this:
```
Fix issue #13
Test
Fix
Fix again
Test
Test again
Does this work?
```
Squash these in to meaningful commits using an interactive rebase.
---
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## Rebase with squash commands
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Squash the commits on the same branch we used for the merge conflicts step.
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```sh
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git rebase -i master
```
In the editor, leave the first commit as 'pick' and set others to 'fixup'.
---
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## Questions?
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![fit](logo.png)
Thank you for your hard work!
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## Additional Resources
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- GitLab Documentation: <http://docs.gitlab.com/>.
- GUI Clients: <http://git-scm.com/downloads/guis>.
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- Pro git book: <http://git-scm.com/book>.
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- Platzi Course: <https://courses.platzi.com/courses/git-gitlab/>.
- Code School tutorial: <http://try.github.io/>.
- Contact us at `subscribers@gitlab.com`.