Use separate cache dir for test isolation

[pinch] / test.sh

#!/bin/sh

set -e

PARALLELISM=4

find . -name '*.py' -print0 | xargs -0 mypy --strict --ignore-missing-imports

for test in tests/*;do
  if [ ! -d "$test" ];then
    "$test"
  fi
done

find . -name '*_test.py' -print0 | xargs -0 -r -n1 python3

find . -name '*.py' -print0 | xargs -0 pylint --reports=n --persistent=n --ignore-imports=y -d fixme,invalid-name,missing-docstring,subprocess-run-check,too-few-public-methods

formatting_needs_fixing=$(
  find . -name '*.py' -print0 |
    xargs -P "$PARALLELISM" -0 -n1 autopep8 --diff -aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
)
if [[ "$formatting_needs_fixing" ]];then
  echo "Formatting needs fixing:"
  echo "$formatting_needs_fixing"
  exit 1
fi