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

# 1. CHECK IF APPLICABLE
if [[ ! -f Gemfile ]]; then
    exit 100
fi

# 2. GET ARGS
plan_path=$2

# 3. GET CONFIGURATION
version=3.0.2
if [[ -f .ruby-version ]]; then
    version=$(tr <.ruby-version -d '[:space:]')
fi

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

# 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 = "ruby"
version = "${version}"
EOL