EnvironmentOf creates a new `Environment` initialized with the givne `Fetcher`, "f".

NewFrom returns a new `*config.Configuration` that reads both its Git and Enviornment-level values from the ones provided instead of the actual `.gitconfig` file or `os.Getenv`, respectively.

NewOsFetcher returns a new *OsFetcher.

Determins the LocalWorkingDir, LocalGitDir etc.

SortExtensions sorts a map of extensions in ascending order by Priority.

parent of index / config / hooks etc.

parent of objects/lfs (may be same as LocalGitDir but may not).

alternative local media dir (relative to clone reference repo).

An Extension describes how to manipulate files during smudge and clean.

FetchPruneConfig collects together the config options that control fetching and pruning.

OsFetcher is an implementation of the Fetcher type for communicating with the system's environment.

Values is a convenience type used to call the NewFromValues function.

An Environment adds additional behavior to a Fetcher, such a type conversion, and default values.

Fetcher provides an interface to get typed information out of a configuration "source".