# Python Image for Continuous Delivery

This project involves creating a Docker image that automates continuous delivery by pulling code from a Git repository's master branch and running a Python script from that branch. Additionally, it provides a Git hook route where a Githook can post notifications about changes on the master branch. The system stops the Python script, pulls the latest changes, and then restarts the script.

## Use Cases

The primary use case is to simplify hosting and updating a webserver. Development can take place on a development branch, and when everything is working fine locally, merging changes into the master branch will trigger an automatic server update.

## Implementation

To achieve this, an entry script is used to clone the specified Git repository and start two scripts. One is a Flask web server that listens for POST requests to trigger updates, and the other is a Python script from the Git repository. Both scripts are managed by Supervisord.

### Entry Script (entryscript.sh)

The entry script performs the following steps:
1. Clones the specified Git repository.
2. Starts Supervisord to manage the two scripts.

### Supervisord Configuration (supervisord.conf)

The Supervisord configuration sets up the management of the two scripts:
- `/home/githook/githook.py`: A script for handling Git hooks.
- `/home/app/app.py`: The main Python script from the Git repository.

### Githook Configuration (githook.py)

The Githook script listens on port 5000 for incoming Git hook notifications.

## How to Build

To build the Docker image, use the following command:

```bash
docker build -t [your_image_name] .
```

## How to Run

To run the Docker container and initiate the continuous delivery process, use the following command:

```bash
docker run -it --rm -p 5000:5000 -e GIT_REPO=http://some-repo.url/path/to/repo [your_image_name]:latest
```

## Logging

If necessary, Supervisord can log output to `/var/log`. You can mount a volume to access these log files if needed.

## Parameters

The following parameters are relevant to the Docker image and environment:

- `/app.py`: The starting script in the Git repository.
- `GIT_REPO`: A Docker environment variable specifying the Git repository URL.
- `5000`: The port used to listen for Githook POST requests.
- `/var/log/`: The path to log files.