RASCSI/python/oled/start.sh

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#!/usr/bin/env bash
set -e
# set -x # Uncomment to Debug
cd "$(dirname "$0")"
# verify packages installed
ERROR=0
if ! command -v dpkg -l i2c-tools &> /dev/null ; then
echo "i2c-tools could not be found"
echo "Run 'sudo apt install i2c-tools' to fix."
ERROR=1
fi
if ! command -v python3 &> /dev/null ; then
echo "python3 could not be found"
echo "Run 'sudo apt install python3' to fix."
ERROR=1
fi
if ! python3 -m venv --help &> /dev/null ; then
echo "venv could not be found"
echo "Run 'sudo apt install python3-venv' to fix."
ERROR=1
fi
# Dep to build Pillow
if ! dpkg -l python3-dev &> /dev/null; then
echo "python3-dev could not be found"
echo "Run 'sudo apt install python3-dev' to fix."
ERROR=1
fi
if ! dpkg -l libjpeg-dev &> /dev/null; then
echo "libjpeg-dev could not be found"
echo "Run 'sudo apt install libjpeg-dev' to fix."
ERROR=1
fi
if ! dpkg -l libpng-dev &> /dev/null; then
echo "libpng-dev could not be found"
echo "Run 'sudo apt install libpng-dev' to fix."
ERROR=1
fi
if ! dpkg -l libopenjp2-7-dev &> /dev/null; then
echo "libopenjp2-7-dev could not be found"
echo "Run 'sudo apt install libopenjp2-7-dev' to fix."
ERROR=1
fi
if [ $ERROR = 1 ] ; then
echo
echo "Fix errors and re-run ./start.sh"
exit 1
fi
if pgrep -f "python3 src/piscsi_oled_monitor.py" &> /dev/null; then
echo "Detected active piscsi_oled_monitor.py process"
echo "Terminating before launching a new one."
sudo pkill -f "python3 src/piscsi_oled_monitor.py"
fi
if ! i2cdetect -y 1 &> /dev/null ; then
echo "i2cdetect -y 1 did not find a screen."
exit 2
fi
# Compiler flags needed for gcc v10 and up
if [[ `gcc --version | awk '/gcc/' | awk -F ' ' '{print $3}' | awk -F '.' '{print $1}'` -ge 10 ]]; then
COMPILER_FLAGS="-fcommon"
fi
# Test for two known broken venv states
if test -e venv; then
GOOD_VENV=true
if ! test -e venv/bin/activate; then
GOOD_VENV=false
else
source venv/bin/activate
pip3 list 1> /dev/null
test $? -eq 1 && GOOD_VENV=false
fi
if ! "$GOOD_VENV"; then
echo "Deleting bad python venv"
sudo rm -rf venv
fi
fi
# Create the venv if it doesn't exist
if ! test -e venv; then
echo "Creating python venv for OLED Screen"
python3 -m venv venv
echo "Activating venv"
source venv/bin/activate
echo "Installing requirements.txt"
pip3 install wheel
CFLAGS="$COMPILER_FLAGS" pip3 install -r requirements.txt
set +e
git rev-parse --is-inside-work-tree &> /dev/null
if [[ $? -eq 0 ]]; then
git rev-parse HEAD > current
fi
set -e
fi
source venv/bin/activate
# Detect if someone updates the git repo - we need to re-run pip3 install.
set +e
git rev-parse --is-inside-work-tree &> /dev/null
if [[ $? -eq 0 ]]; then
set -e
if ! test -e current; then
git rev-parse > current
elif [ "$(cat current)" != "$(git rev-parse HEAD)" ]; then
echo "New version detected, updating libraries from requirements.txt"
CFLAGS="$COMPILER_FLAGS" pip3 install -r requirements.txt
git rev-parse HEAD > current
fi
else
echo "Warning: Not running from a valid git repository. Will not be able to update the code."
fi
set -e
# parse arguments
while [ "$1" != "" ]; do
PARAM=$(echo "$1" | awk -F= '{print $1}')
VALUE=$(echo "$1" | awk -F= '{print $2}')
case $PARAM in
-r | --rotation)
ROTATION="--rotation $VALUE"
;;
-h | --height)
HEIGHT="--height $VALUE"
;;
-i | --refresh_interval)
INTERVAL="--refresh_interval $VALUE"
;;
-P | --password)
PASSWORD="--password $VALUE"
;;
*)
echo "ERROR: unknown parameter \"$PARAM\""
exit 1
;;
esac
shift
done
echo "Starting OLED Screen..."
if [ -z ${ROTATION+x} ]; then
echo "No screen rotation parameter given; falling back to the default."
else
echo "Starting with parameter $ROTATION"
fi
if [ -z ${HEIGHT+x} ]; then
echo "No screen height parameter given; falling back to the default."
else
echo "Starting with parameter $HEIGHT"
fi
PYTHON_COMMON_PATH=$(dirname $PWD)/common/src
export PYTHONPATH=$PWD/src:${PYTHON_COMMON_PATH}
python3 src/piscsi_oled_monitor.py ${ROTATION} ${HEIGHT} ${INTERVAL} ${PASSWORD}