File parsers

File parsers take a set of dependency files and extract a list of dependencies for the project.

There is a Dependabot::FileParsers class for each language Dependabot supports.

Public API

Each Dependabot::FileParsers class implements the following methods:

Method	Description
#parse	Returns an array of Dependabot::Dependency instances, representing the dependencies for the project. Each Dependabot::Dependency has a name, version and a requirements array

An integration might look as follows:

require 'dependabot/file_parsers'

files = fetcher.files

parser_class = Dependabot::FileParsers::Ruby::Bundler
source = Dependabot::Source.new(provider: 'github', repo: "gocardless/business")
parser = parser_class.new(dependency_files: files, source: source)

dependencies = parser.parse

puts "Found the following dependencies: #{dependencies.map(&:name)}"

Writing a file parser for a new language

All new file parsers should inherit from Dependabot::FileParsers::Base and implement the following methods:

Method	Description
#parse	See Public API section.
#check_required_files	Raise a runtime error unless an appropriate set of files is provided. Private.

To ensure the above are implemented, you should include it_behaves_like "a dependency file parser" in your specs for the new file parser.