Introduce Chars

This improves the implementation by introducing a class to manage the characters

pull_and_optimize.sh

@@ -2,9 +2,19 @@
 # This script was written to streamline a remote development workflow. We work on the
 # code on a computer, that is well equipped for that task. The committed and pushed
 # code then gets processed on another machine, which uses this script, to update its
-# code base and run the parameters handed over. It is designed to have the script
-# name for execution with a Python interpreter and PySCIPOpt as the only parameter, e.g.
-# $ ./pull_and_optimize.sh ilp_optimize.py
+# code base and run the parameters handed over. It is designed to be called without
+# parameters to execute the optimize module of the latest version released on
+# Test.PyPI.org.
+#
+# $ ./pull_and_optimize.sh
+#
+# Alternatively you could invoke any other command in the Python interpreter by
+# appending any command, normally appended to 'python <YOUR_COMMAND>' to the script.
+# i.e.
+#
+#
+# $ ./pull_and_optimize.sh -m pytest
+#
 # The execution requires the Docker image of our repository
 # https://github.com/BjoernLudwigPTB/docker_pyscipopt to be built in advance.
 SCRIPT_PATH="${BASH_SOURCE}"
@@ -15,10 +25,9 @@ while [ -L "${SCRIPT_PATH}" ]; do
 done
 SCRIPT_PATH="$(readlink -f "${SCRIPT_PATH}")"
 SCRIPT_DIR="$(cd -P "$(dirname -- "${SCRIPT_PATH}")" >/dev/null 2>&1 && pwd)"
-set -x
-cd ${SCRIPT_DIR}
-git pull
-docker build -t ilp_keyboard_layout_optimization:latest docker/
+cd ${SCRIPT_DIR} && \
+git pull && \
+docker build --no-cache -t ilp_keyboard_layout_optimization:latest docker/ && \
 docker run -it --rm ilp_keyboard_layout_optimization \
-  -m ilp_keyboard_layout_optimization.optimize
+  ${1:--m ilp_keyboard_layout_optimization.optimize}