AddHostEnv processes given key and returns if the environment variable should be added to the container or not.

FileMap returns a map of KEY=VAL env vars from an environment file f.

HostEnvMap returns a map of host env vars to pass into the container.

MergeMap merges two maps of environment variables, with values in b replacing values also set in a.

SetContainerEnv cleans environment variables before running the container.

SetFromList sets environment variables from environ argument list.

SingularityEnvMap returns a map of SINGULARITYENV_ prefixed env vars to their values.

DefaultPath defines default value for PATH environment variable.

SingularityEnvPrefix defines the environment variable prefix SINGULARITYENV_.

SingularityPrefix defines the environment variable prefix SINGULARITY_.

AlwaysOmitKeys lists environment variables that are never passed from the host into the container, with a boolean to indicate whether the key can be overridden by a user-specificed SINGULARITYENV_ / --env / --env-file value.

AlwaysPassKeys lists environment variables that are always passed from the host into the container.