add pre-commit

scripts/run-in-env.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -eu
+
+# Activate pyenv and virtualenv if present, then run the specified command
+
+# pyenv, pyenv-virtualenv
+if [ -s .python-version ]; then
+    PYENV_VERSION=$(head -n 1 .python-version)
+    export PYENV_VERSION
+fi
+
+# other common virtualenvs
+my_path=$(git rev-parse --show-toplevel)
+
+for venv in venv .venv .; do
+  if [ -f "${my_path}/${venv}/bin/activate" ]; then
+    . "${my_path}/${venv}/bin/activate"
+  fi
+done
+
+exec "$@"