CheckPath cleans the filesystem path of special characters.

CheckURL cleans the URL.

DurationBounds allows setting a floor and ceiling on a value.

EnsureDir checks a file could be written to a path, creates the directories as needed.

Example is a dummy that returns always no error, use as a prototype.

FileExists reports whether the named file or directory exists.

Float64Bounds allows setting a floor and ceiling on a value.

IntBounds allows setting a floor and ceiling on a value.

Join joins together a path and filename.

MinUint32 is a helper function to return the minimum of two uint32s.

NewApp returns a new App note that this by default includes a datadir for saving the flags defined for the app and a version subcommand (in addition to the flags).

UintBounds allows setting a floor and ceiling on a value.