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#1706 scorecard - address review comments in docs
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Signed-off-by: Nigel Jones <[email protected]>
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planetf1 committed Jun 27, 2024
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35 changes: 16 additions & 19 deletions docs/PROCEDURES.md
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Expand Up @@ -8,36 +8,31 @@ dependencies they use:
* to ensure reproducibility
* to reduce the risk for rogue dependency updates to compromise software

It's important to note that this requires any changes to dependencies are properly review, and
It's important to note that this requires any changes to dependencies are properly reviewed, and
these changes, by design, should not be automatic in themselves, though automated tools may provide recommendations.

### Python dependencies

Python dependencies used in the build process should be pinned to a specific version to ensure reproducibility.
Python dependencies used in the build process such as within `.github/workflows` should be pinned to a specific version to ensure reproducibility.

This is done by:
* Using the `--require-hashes` option on any `pip install` command line
* Adding the required hash in the `requirements.txt`
This is achieved by:

Currently this is used within `.github/workflows` but the same principle applies elsewhere.
* Ensuring the required hash is in the `requirements.txt`.
* Using the `--require-hashes` option on any `pip install` command line which causes pip to require hashes for all dependencies.

To make this easier, a version of the `requirements.txt` without hashes has been saved as `requirements.in`. This is
to make maintenance easier, but it is not used at script execution time.
To add a new, or changed dependency:

The `pip-compile` tool must be installed via the [pip-tools](https://pypi.org/project/pip-tools/) package.

To add a new, or changed dependency:
```
pip-compile --generate-hashes --output-file=requirements.txt requirements.in
```
* Ensure the `pip-compile` tool is installed via the [pip-tools](https://pypi.org/project/pip-tools/) package.
* Update `requirements.in` with added, modified, or deleted dependencies.
* Update requirements.txt using `pip-compile --generate-hashes --output-file=requirements.txt requirements.in`.
* Verify correct functionality.
* Check in both `requirements.txt` and `requirements.in`.

This will update requirements.txt with the correct hashes.

Correct functionality should be verified, and then both `requirements.txt` and `requirements.in` checked in.
Note: `requirements.in` acts purely as a template in this process. It is not used during the installation of a dependency.

### Github Actions

All actions used in `.github/worfklows' should pin the exact version of the action they are using, for
All actions used in `.github/worfklows` should pin the exact version of the action they are using, for
example a step such as:

```yaml
Expand All @@ -54,10 +49,12 @@ by, for example, running:
pin-github-action unix.yml
```

This will add the appropriate hash if not present, and also update each hash in accordance with the comment.
This will add the appropriate hash if not present, along with a comment, and also update each hash in accordance with any existing comment.

For major updates, update the comment ie `pin@v4` to `pin@v5` and the tool will attempt to find the new hash.

The comment should not be removed, and should exclusively be used for updating the version.

A full explanation of how the tool operates can be found in the [documentation](https://github.com/mheap/pin-github-action).

To help in explanation here's an example of a similar code fragment between tool executions:
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