There are two main parts to configuring TaskForest: configuring the Family files that specify job dependencies, and setting the options that determine TaskForest's behavior.
All settings (required and optional) may be specified in a variety of ways: command line, environment variable and config file. The order of preferences is this: Most options have default values. Settings specified in the config file override those defaults. Settings specified in environment variables take override those specified in the config file and the default values. Setting specified on the command line override those specified in envrionment variables, and those specified in the config files and the default values.
The names of the environment variable are the same as the names of the settings on the command line (or in the config file), but they should be in UPPER CASE, with ``TF_'' prepended. For example, the environment variable name for the 'run_wrapper' setting is 'TF_RUN_WRAPPER'.