### Checking Python Version Files

Source: https://context7.com/cloudfoundry/bosh-package-python-release/llms.txt

Example of how to verify the installed Python version by checking the version file within the package directory.

```bash
# Check which version to use by examining the version file
# packages/python-3.12/version contains: 3.12.13
# packages/python-3.11/version contains: 3.11.15
# packages/python-3.10/version contains: 3.10.20
```

--------------------------------

### Install Packages from Local Dependencies

Source: https://context7.com/cloudfoundry/bosh-package-python-release/llms.txt

Use `bosh_pip_local` in your packaging script to install Python packages from vendored tarballs stored locally in the `deps/` directory. This avoids network access during compilation.

```bash
# In your packaging script with offline/local dependencies

source /var/vcap/packages/python-3.12/bosh/compile.env

# Install packages from local deps directory (no network access)
# Packages should be placed in deps/ directory as .tar.gz files
bosh_pip_local requests flask

# Generate runtime environment
bosh_generate_runtime_env
```

--------------------------------

### Using Compile Environment Helper Functions

Source: https://context7.com/cloudfoundry/bosh-package-python-release/llms.txt

Helper functions for installing Python packages and generating runtime environment files during BOSH compilation.

```bash
#!/bin/bash -eu
source /var/vcap/packages/python-3.12/bosh/compile.env

# bosh_pip - Install from PyPI
# Installs packages with --prefix set to BOSH_INSTALL_TARGET
bosh_pip numpy pandas scikit-learn

# bosh_pip_local - Install from local files
# Looks for packages in ./deps directory, no network access
# Place wheel/tarball files in deps/ folder of your package
bosh_pip_local my-internal-package

# bosh_generate_runtime_env - Create runtime.env
# Generates runtime.env in BOSH_INSTALL_TARGET/bosh/
# Sets PATH and PYTHONPATH for your installed packages
bosh_generate_runtime_env
```

--------------------------------

### Configure compilation environment

Source: https://github.com/cloudfoundry/bosh-package-python-release/blob/main/README.md

Source the compile.env file in your packaging script to enable the Python environment for pip installations.

```bash
#!/bin/bash -eu
source /var/vcap/packages/python-2.7/bosh/compile.env
pip install ...
```

--------------------------------

### Environment Variables Reference

Source: https://context7.com/cloudfoundry/bosh-package-python-release/llms.txt

Environment files export PATH and PYTHONPATH to ensure Python and installed packages are accessible. The compile environment includes additional helper functions.

```bash
# Runtime environment (/var/vcap/packages/python-3.12/bosh/runtime.env)
export PATH=/var/vcap/packages/python-3.12/bin:$PATH
export PYTHONPATH=/var/vcap/packages/python-3.12/lib/python3.12/site-packages:$PYTHONPATH

# Compile environment includes additional helpers:
# -bosh_pip: Install packages from PyPI
# -bosh_pip_local: Install packages from local deps directory
# -bosh_generate_runtime_env: Generate runtime.env for your package
```

--------------------------------

### Source Compile Environment in Packaging Script

Source: https://context7.com/cloudfoundry/bosh-package-python-release/llms.txt

Source the Python compile environment in your packaging script to set up PATH, PYTHONPATH, and access helper functions for installing Python packages during BOSH package compilation.

```bash
# In your packaging script (packages/my-package/packaging)

# Source the Python compile environment
source /var/vcap/packages/python-3.12/bosh/compile.env

# Install packages from PyPI using bosh_pip helper
bosh_pip requests flask gunicorn

# Install specific versions
bosh_pip "requests==2.31.0" "flask>=2.0,<3.0"

# Generate runtime.env for your package
bosh_generate_runtime_env
```

--------------------------------

### Deploy Test Manifest

Source: https://context7.com/cloudfoundry/bosh-package-python-release/llms.txt

The deployment manifest defines instance groups that run Python test jobs. It demonstrates referencing the Python release and packages within the `instance_groups` configuration.

```yaml
---
name: my-deployment

releases:
- name: python
  version: latest
- name: my-release
  version: latest

stemcells:
- alias: default
  os: ubuntu-noble
  version: latest

update:
  canaries: 1
  max_in_flight: 1
  canary_watch_time: 5000-60000
  update_watch_time: 5000-60000

instance_groups:
- name: python-app
  azs: [z1]
  instances: 1
  jobs:
  - name: my-python-job
    release: my-release
    properties:
      my_python_job:
        port: 8080
  vm_type: default
  stemcell: default
  networks:
  - name: default
```

--------------------------------

### Vendor Python package

Source: https://github.com/cloudfoundry/bosh-package-python-release/blob/main/README.md

Use this command to vendor a specific Python package version into your BOSH release.

```bash
$ bosh vendor-package python-2.7 ~/workspace/bosh-packages/python-release
```

--------------------------------

### Create Job Spec Using Python Package

Source: https://context7.com/cloudfoundry/bosh-package-python-release/llms.txt

Define your job configuration in `jobs/my-python-job/spec`, including required packages like `python-3.12` and `my-python-app`, and specify template files.

```yaml
---
# jobs/my-python-job/spec
name: my-python-job

templates:
  run.erb: bin/run
  config.yml.erb: config/config.yml

packages:
- python-3.12
- my-python-app

properties:
  my_python_job.port:
    description: "Port to listen on"
    default: 8080
```

--------------------------------

### Vendor Python Package into Release

Source: https://context7.com/cloudfoundry/bosh-package-python-release/llms.txt

Use `bosh vendor-package` to copy the desired Python version into your BOSH release. This makes it available for compilation and runtime.

```bash
bosh vendor-package python-3.12 ~/workspace/bosh-packages/python-release
```

```bash
bosh vendor-package python-3.11 ~/workspace/bosh-packages/python-release
```

```bash
bosh vendor-package python-3.10 ~/workspace/bosh-packages/python-release
```

--------------------------------

### Source Runtime Environment in Job Templates

Source: https://context7.com/cloudfoundry/bosh-package-python-release/llms.txt

Source the Python runtime environment in your job template to configure PATH and PYTHONPATH for running Python applications. Ensure your application's runtime environment is also sourced.

```bash
# In your job template (jobs/my-job/templates/run.erb)

# Source the Python runtime environment
source /var/vcap/packages/python-3.12/bosh/runtime.env

# Source your application's runtime environment
source /var/vcap/packages/my-python-app/bosh/runtime.env

# Run your Python application
exec python3 /var/vcap/packages/my-python-app/app.py
```

--------------------------------

### Define Package Spec with Python Dependency

Source: https://context7.com/cloudfoundry/bosh-package-python-release/llms.txt

Declare a dependency on a Python package in your `packages/my-python-app/spec` file. This ensures the Python package is compiled and available before your package.

```yaml
---
# packages/my-python-app/spec
name: my-python-app

dependencies:
- python-3.12

files:
- my-python-app/**/*
```

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