For developers only: get the environment where a
target runs its command. Designed to be called
while the target is running. The environment
tar_envir(default = parent.frame())
Environment, value to return if
If called from a running target,
the environment where the target runs its command.
If called outside a pipeline, the return value is
whatever the user supplies to
(which defaults to
Most users should not use
tar_envir() because accidental
parent.env(tar_envir()) could break the pipeline.
tar_envir() only exists in order to support third-party interface
packages, and even then the returned environment is not modified.
tar_envir()#> <environment: 0x55bec1478f88>#> <environment: 0x55bec158e2c0>