# `TF003` Use Git for versionning

Setup a git repo with the current files, to be able to revert any change if desired

:::{dropdown} Is a test for
:open: 
:icon: check-circle-fill
:color: primary

[`SF004` Version controlled](/requirements/SF004)
:::

## Initial state
The expected state is the final state of
[`TF002` Generate a PDF](/tests/TF002)
## Procedure
### Step 1
Initialize a git repository
```console
$ git init
Initialized empty Git repository in [...]
```
### Step 2
Start tracking the specification files
```console
$ git add spec.yaml specification.typ
```
### Step 3
Save current files version
```console
$ git commit -m "Initial commit: first 2 requirements and 1 test"

```
### Step 4
Give a name to that version
```console
$ git tag 0.0.1
```
### Step 5
Delete a requirement in spec.yaml
```console
$ cat spec.yaml
```
```yaml
kind: requirements
category: functional
requirements:
- id: S01
  short: Lorem ipsum
  long: The first requirement

```
### Step 6
Confirm the requirement is gone
```console
$ typst compile specification.typ && open specification.pdf
```
### Step 7
Revert the deletion
```console
$ git checkout -- .

```
### Step 8
Confirm the requirement is back
```console
$ typst compile specification.typ && open specification.pdf
```