Exists tests for the presence of a comply configuration file.

ProjectRoot is the fully-qualified path to the root directory.

SetPandoc records pandoc availability during initialization.

SetProjectRoot is used by the test suite.

WhichPandoc indicates which pandoc invocation path should be used.

YAML is the parsed contents of ProjectRoot()/config.yml.

UseDocker invokes pandoc within Docker.

UsePandoc invokes pandoc directly.

Config is the parsed contents of ProjectRoot()/config.yml.