-# Copyright (c) 2021 Cisco and/or its affiliates.
+# Copyright (c) 2022 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
# See the License for the specific language governing permissions and
# limitations under the License.
-This directory contains checker scripts and other files they need.
-Each checker script is assumed to be run from tox,
+This directory contains tox scripts and other files they need.
+Generally, a tox script is either a checker (suitable for automated verify)
+or a fixer (manually started, risky as uncommitted edits can be lost).
+Each tox script is assumed to be run from tox,
when working directory is set to ${CSIT_DIR}.
-Each script should:
+
+Each checker script should:
+ Return nonzero exit code when it fails.
++ The tox might ignore the code when the check is not blocking.
+ Write less verbose output to stderr.
++ The level of "less verbose" depends on check and state of codebase.
+ TODO: Should we carefully document which files are
whitelisted/blacklisted for a particulat check?
+
+Each fixer script should:
++ Perform edits on current filesystem
++ Not assume git is clean (there may be uncommitted edits).
++ Use "git diff HEAD~" to get both comitted and uncomitted edits to analyze.
++ Output whatever it wants (possibly nothing).
+
+TODO: Should checkers be named differently than fixers?
+ E.g. both scripts and tox environments start with fix_?