dsd-pythonanywhere 0.1.1

A plugin for django-simple-deploy, supporting deployments to PythonAnywhere.

dsd-pythonanywhere

A plugin for deploying Django projects to PythonAnywhere, using django-simple-deploy.

For full documentation, see the documentation for django-simple-deploy.

Current status: In active development. Not yet recommended for actual deployments yet.

• Motivation
• Quickstart
• Approach
• Plugin Development
  • Automated Tests
  • Releasing

Motivation

This plugin hopes to provide a deployment option for django-simple-deploy that doesn't require a credit card to get started. PythonAnywhere offers a free tier that allows users to deploy small Django apps and may be a helpful way to get small Django apps online without financial commitment.

Quickstart

Deployment to PythonAnywhere with this plugin requires a few prerequisites:

• You must use Git to track your project and push your code to a remote repository (e.g. GitHub, GitLab, Bitbucket).
• You must track dependencies with a requirements.txt file.
• Create a PythonAnywhere Beginner account, which is a limited account with one web app, but requires no credit card.
• Generate an API token
• Stay logged in to PythonAnywhere in your default browser.

With those prerequisites met, and if you're coming from the Django Girls tutorial Deploy section, you can deploy your project with the following steps:

1. Export your PythonAnywhere API credentials and install dsd-pythonanywhere:

# Export your PythonAnywhere API credentials as environment variables
export API_USER=[your_pythonanywhere_username]
export API_TOKEN=[your_pythonanywhere_api_token]
# Install dsd-pythonanywhere (which also installs django-simple-deploy)
pip install dsd-pythonanywhere

2. Add django-simple-deploy to your INSTALLED_APPS in settings.py:

diff --git a/mysite/settings.py b/mysite/settings.py
index 8bf8f39..b288aa1 100644
--- a/mysite/settings.py
+++ b/mysite/settings.py
@@ -38,6 +38,7 @@ INSTALLED_APPS = [
     "django.contrib.messages",
     "django.contrib.staticfiles",
     "blog",
+    "django_simple_deploy",
 ]

3. Run the deployment command:

python manage.py deploy --automate-all

This command can take several minutes as it creates the web app, installs dependencies, etc. You should see progress in your browser console on PythonAnywhere as well.

If you run into issues and need to re-run the deployment, you may need to reset your local and remote repositories to a clean state first:

# Stash any local changes
git stash --include-untracked
# Go back to step 2 since settings.py was reverted

Approach

PythonAnywhere provides a pa_autoconfigure_django.py helper script, currently used in the Django Girls tutorial. However, it's designed to run directly on PythonAnywhere, which presents challenges: using a web-based console, changes not being committed/pushed to version control, etc.

This plugin integrates with django-simple-deploy to provide a more familiar local workflow, though with some caveats due to free tier limitations (primarily lack of SSH access and required browser interaction).

sequenceDiagram
    participant User as Local Machine
    participant Browser
    participant GitHub
    participant PA as PythonAnywhere

    User->>GitHub: Commit & push changes

    User->>PA: Bash Console API: create console
    User->>Browser: Open console URL
    Note over Browser,PA: Browser connection starts bash process

    User->>PA: Bash Console API: clone repo
    PA->>GitHub: git clone
    PA->>PA: Install dependencies & create .env

    User->>PA: Webapp API: create webapp
    User->>PA: Bash Console API: copy wsgi.py

    PA-->>User: 🎉 App deployed!

Note: Users should stay logged into PythonAnywhere in their default browser during deployment.

Additionally:

• If a PythonAnywhere bash console isn't already running, the plugin will programmatically open your browser to the console URL. This is required because the PythonAnywhere API creates console objects but doesn't start the actual process. Only connecting to the console in a browser will do that (per the API documentation).

Plugin Development

To set up a development environment for working on this plugin alongside django-simple-deploy, follow these steps. This will create a directory structure that looks like this:

dsd-dev/
├── django-simple-deploy             # ← parent project needed to run integration tests
├── dsd-pythonanywhere               # ← our plugin development directory
└── dsd-dev-project_[random_string]  # ← sample project for testing deployments

1. Create a parent directory to hold your development work:

mkdir dsd-dev
cd dsd-dev/

2. Clone dsd-pythonanywhere for development:

# Clone dsd-pythonanywhere for development (and switch to branch being worked on)
git clone [e-mail]:caktus/dsd-pythonanywhere.git

3. Clone django-simple-deploy and create the blog sample project

git clone [e-mail]:django-simple-deploy/django-simple-deploy.git
cd django-simple-deploy/
# Builds a copy of the sample project in parent dir for testing (../dsd-dev-project_[random_string]/)
uv run python tests/e2e_tests/utils/build_dev_env.py

4. Setup the development environment:

cd ../
cd dsd-dev-project_[random_string]/
source .venv/bin/activate
# Install dsd-pythonanywhere plugin in editable mode
pip install -e "../dsd-pythonanywhere/[dev]"

Your development environment is now configured to use your local copy of django-simple-deploy and the dsd-pythonanywhere plugin in editable mode. Verify with:

pip show django_simple_deploy dsd_pythonanywhere | grep Editable

5. Create a new public repository on GitHub.

6. Push the sample project to your new repository:

git remote add origin [e-mail]:[your_github_username]/[your_new_repo_name].git
git branch -M main
git push -u origin main

7. Configure environment variables for PythonAnywhere API access:

export API_USER=[your_pythonanywhere_username]
export API_TOKEN=[your_pythonanywhere_api_token]

If desired, you can add these lines to a .env file in the parent directory to more easily load them when working on the project:

source ../.env

8. You can now make changes to dsd-pythonanywhere in the cloned directory and test them by running deployments from the sample project:

python manage.py deploy
# To reset your sample project to a clean state between tests
python ./reset_project.py
# (**CAUTION**) If using --automate-all, you may need to force push to reset the remote changes
git push origin main --force

9. (Optional) Forward local ports for script debugging on PythonAnywhere:

To debug scripts/setup.sh that's run on PythonAnywhere during deployment, you can use a service like ngrok to expose your local dsd_pythonanywhere development code to the remote environment. First, start ngrok to forward a local port (e.g., 8000):

# In a new terminal
ngrok http 8000 --url https://<your_ngrok_subdomain>.ngrok-free.app

Then run a local HTTP server to serve your dsd_pythonanywhere code:

# In another terminal in the dsd-pythonanywhere directory
uv run python -m http.server 8000

Finally, set the REMOTE_SETUP_SCRIPT_URL environment variable in your sample project to point to the ngrok URL for scripts/setup.sh:

export REMOTE_SETUP_SCRIPT_URL="https://<your_ngrok_subdomain>.ngrok-free.app/scripts/setup.sh"

Automated Tests

To run the unit tests for this plugin, run:

cd dsd-pythonanywhere/
uv run pytest

To run the integration tests (and unit tests), which exercise the mechanics of python manage.py deploy locally without actually deploying to PythonAnywhere, run:

cd django-simple-deploy/
# Install dsd-pythonanywhere plugin in editable mode
uv add --editable "../dsd-pythonanywhere[dev]"
uv run pytest
# To skip platform_agnostic_tests for faster feedback during plugin development:
uv run pytest --ignore=tests/integration_tests/platform_agnostic_tests

Releasing

1. Bump the version in pyproject.toml:

   uv version --bump patch  # or --bump minor/major
   

2. Add release notes to CHANGELOG.md

3. Create a new release on GitHub:

   • Tag the version (e.g., v0.2.1)
   • Add the same release notes
   • Publish the release

   When the release is published, CI automatically builds and publishes the package to PyPI.

Test Release

If you're testing a release, you can use test.pypi.org with a command like:

op run --env-file ../.testpypi -- uv publish --publish-url https://test.pypi.org/legacy/