Create a script to set-up the virtual environment inside a TF1.15 singularity containe.

video_prediction_tools/env_setup/install_venv_container.sh

+#
+# __authors__ = Bing Gong, Michael Langguth
+# __date__  = '2021_10_28'
+# __last_update__  = '2021_10_28' by Michael Langguth
+#
+# **************** Description ****************
+# This auxiliary script sets up the virtual environment within a singularity container.
+# **************** Description ****************
+
+# sanity checks
+# check if we are running in a container
+if [ -z "${SINGULARITY_NAME}" ]; then
+  echo "ERROR: install_venv_container.sh must be called within a running singularity container."
+  exit
+fi
+
+# check if directory to virtual environment is parsed
+if [[ -z "$1" ]]; then
+  echo "ERROR: Provide a name to set up the virtual environment."
+  exit
+fi
+
+# check if virtual environment is not already existing
+if [ -d "$1" ]; then
+  echo "ERROR: Target directory of virtual environment ${1} already exists. Chosse another directory path."
+  exit
+fi
+
+# check for requirement-file
+if [ ! -d "${BASE_DIR}/requirements_container.txt" ]; then
+  echo "ERROR: Cannot find requirement-file ${BASE_DIR}/requirements_container.txt to set up virtual environment."
+  exit
+fi
+
+BASE_DIR=`pwd`
+VENV_BASE=$1
+VENV_NAME="$(dirname "$ENV_SETUP_DIR")"
+VENV_DIR=${VENV_BASE}/${VENV_NAME}
+
+# create basic target directory for virtual environment
+mkdir "${VENV_BASE}"
+# Install virtualenv in this directory
+pip install --target="${VENV_BASE}/" virtualenv
+# Change into the directory...
+cd "${VENV_BASE}" || exit
+# .. to set-up virtual environment therein
+python -m virtualenv -p /usr/bin/python --system-site-packages "${VENV_NAME}"
+# Activate virtual environment and install required packages
+echo "Actiavting virtual environment ${ENV_DIR} to install required Python modules..."
+source "${VENV_DIR}/bin/activate"
+pip install -r "${BASE_DIR}/requirements_container.txt"
+
+# get back to basic directory
+cd "${BASE_DIR}" || exit
+
+
+