#!/usr/bin/env bash
set -eo pipefail

# 1. CHECK IF APPLICABLE
if [ ! -f "requirements.txt" ] && [ ! -f "setup.py" ]; then
    exit 100
fi

# 2. GET ARGS
plan_path=$2

# 3. GET CONFIGURATION
version=3.9.7
if [[ -f .python-version ]]; then
    version=$(tr <.python-version -d '[:space:] | python-')
fi

# 4. DECLARE DEPENDENCIES
cat >>"${plan_path}" <<EOL
# Buildpack provides this dependency
#
# NOTE: The dependency is provided during the 'build' process.
#
[[provides]]
name = "python"

# Buildpack requires this dependency
#
# NOTE: Everything aside from 'name' is simply additional information that the providing buildpack can use to resolve
#       the dependency.
#
[[requires]]
name = "python"
version = "${version}"
EOL