chore(tox): Pass environment variables

Author: effigies

tox.ini

@@ -27,6 +27,20 @@ labels = test
 pip_pre =
   pre: true
 pass_env =
+  TEMPLATEFLOW_HOME
+  # Freesurfer variables searched for
+  FREESURFER_HOME
+  SUBJECTS_DIR
+  FS_LICENSE
+  # CI variables
+  TEST_DATA_HOME
+  TEST_OUTPUT_DIR
+  TEST_WORK_DIR
+  FMRIPREP_REGRESSION_SOURCE
+  CACHED_WORK_DIRECTORY
+  # CircleCI-specific
+  CIRCLE_NPROCS
+  SAVE_CIRCLE_ARTIFACTS
   # getpass.getuser() sources for Windows:
   LOGNAME
   USER
@@ -92,7 +106,6 @@ set_env =
   # https://github.com/pypa/pip/issues/11684
   # https://github.com/pypa/pip/issues/12243
   strict: PYTHONWARNINGS=error,once:pkg_resources is deprecated as an API.:DeprecationWarning:pip._internal.metadata.importlib._envs,once:Unimplemented abstract methods {'locate_file'}:DeprecationWarning:pip._internal.metadata.importlib._dists
-commands_pre =
 commands =
   python -m build
   python -m twine check dist/*