2025-05-12 (3 VO): C++ “Door” Exercise Recap, Some Git#

C++ Material #

Strongly Typed enum

Some Git #

Add/Commit #

View changes

Current working directory somewhere inside the tree,
```
$ git status
...
```

git add changes: stage for next commit

$ git add file.h file.cpp
...

Review repo situation

$ git status
...

git commit what you staged

Either non-interactive (giving the commit message as a commandline parameter)
```
$ git commit -m 'frobozz the foobar'
```
Or letting git pop up your favorite $EDITOR
```
$ git commit
```

Access Github Over SSH Not HTTPS #

This is simpler. HTTPS requires two factor auth and jumping through hoops.

Deploy SSH public on GH ⟶ homework. On Github, You -> Settings -> SSH and GPG Keys. Paste your public key.

Change `origin`, And Push #

../../../../../../../_images/git-workflow.jpg

origin is the default for git pull and git push. We want that these operation always go to something where we have write access - our own “fork”.

On Github (jfasch/FH-STECE2023), fork the project into something where you have write access; say, you/FH-STECE2023.git. Press the “Fork” button and follow the instructions.
Change origin of your clone to be your fork
```
$ git remote set-url origin git@github.com:you/FH-STECE2023.git
```
Note the SSH URL, starting with git@github.com:.
Pull changes that you don’t have. Reason: between the time you cloned your repo (remember, from jfasch/FH-STECE2023), and the time you created the fork, some commits have been pushed to jfasch/FH-STECE2023.
```
$ git pull
... an editor will pop up. accept the prefilled "this is a merge commit" message ...
```
Push your repo; this will now go into your new repo git@github.com:you/FH-STECE2023.git
```
$ git push
```

Homework #

Local C++ Transformation #

Complete the C++ transformation according to the example in lib/push-button.h and lib/push-button.cpp

See door sketch in Door Exercise. For all the components in your exercise/firstname.lastname/lib directory, change its implementation from C struct to C++ class.
- PushButton
- LightBarrier
- Motor
- Door (the C struct has pointer members, and this does not change in the C++ class)
Make sure the tests still run
Make clean commits in your local repo that you cloned from jfasch/FH-STECE2023.git the other day

Fork on Github, And Change Your `origin`#

Following the procedure outlined in Change origin, And Push,

Create a fork of our project
In your clone from earlier days, change origin to that fork.
Push your repo to the new origin

Submission: Pull Request #

To submit, send me a pull request.