install-linux-ubuntu.sh

#!/bin/bash
set -e
echo "This script contains the sudo command and will prompt for your password."
echo "It needs to be run with a user authorized for sudo, but it shall not be run using sudo!"
echo ""

# read target user name
echo "The program will be set up for user $USER. Press enter to continue"
# compgen -u || true
read USER_CONFIRM
TARGET_USER="$USER"

echo "Do you want to install using snap or downloaded script?"
echo "Type \"snap\" to continue with snap and anything else to continue with script downloaded from nodesource.com"
read INSTALL_VIA_SNAP
if [[ $INSTALL_VIA_SNAP == "snap" ]]
then
  echo "Installing node using snap"
  sudo snap install node
else
  echo "Installing node using script downloaded from nodesource.com"
  LANG=en_US.utf8 curl -fsSL https://deb.nodesource.com/setup_16.x > temp_setup_16.sh
  echo "if your distribution is not supported, add it to the check_alt commands"
  sudo bash temp_setup_16.sh
  rm temp_setup_16.sh
fi

sudo apt-get update
sudo apt-get install -y openssh-server vim nodejs mpg123 net-tools wireless-tools
sudo npm install -g react-scripts

# enable ssh access from outside
sudo systemctl status ssh
sudo systemctl enable ssh

# build node-dj
npm install

# build node-dj-controller
cd frontend && npm install && npm run build && cd ..

# query mechanism for starting program at boot time
echo "How do you want to make the program start at boot time?"
echo "Type \"cron\" to continue with cron setup or anything else for systemd (default)"
read MECHANISM_FOR_RUNNING_AT_BOOT_TIME

# query _unmute and set volume at boot_ type
echo "Do you want the device's volume to be set to _unmuted_ and 100% at boot time?"
echo "Type \"yes\" to continue with setting volume at boot time or anything else for not setting volume (default)"
read SET_VOLUME_AT_BOOT_TIME

# query optional maxoldspacesize parameter
echo "Do you want the run script to set the max-old-space-size parameter to solve npm install bugs?"
echo "Type \"setparam\" to continue with max-old-space-size parameter or anything else for no (default)"
read SET_MAX_OLD_SPACE_SIZE_PARAM

# query whether there should be a wait when starting
echo "Do you want the run script to contain a _sleep_ command to allow the system to boot completely?"
echo "Type \"yes\" to continue with sleep command or anything else for no (default)"
read ADD_SLEEP_COMMAND

# Generate run.sh
echo "Please enter the library root path:"
read LIBRARY_PATH
rm run.sh 2> /dev/null || true
touch run.sh 2> /dev/null || true
echo "#!/bin/bash" >> run.sh
echo '' >> run.sh
echo '# check for workingdir, might be ~ due to crontab execution' >> run.sh
echo 'WORKINGDIR=$(pwd)' >> run.sh
if [[ $MECHANISM_FOR_RUNNING_AT_BOOT_TIME == "cron" ]]
then
  echo '# add PATH to in case cron doesnt have it' >> run.sh
  echo "export PATH=\"$PATH\"" >> run.sh
  echo "export XDG_RUNTIME_DIR=\"/run/user/1000\"" >> run.sh
fi
echo 'MSG_WHEN_STARTING_PROGRAM=""' >> run.sh
echo 'if [ "$WORKINGDIR" == "*node-dj" ]' >> run.sh
echo 'then' >> run.sh
echo '    MSG_WHEN_STARTING_PROGRAM="Already in folder $WORKINGDIR"' >> run.sh
echo 'else' >> run.sh
echo "    cd /home/$TARGET_USER/node-dj" >> run.sh
echo '    MSG_WHEN_STARTING_PROGRAM="Switched to node-dj folder from $WORKINGDIR"' >> run.sh
echo 'fi' >> run.sh


echo 'DATE=$(date "+%Y-%m-%d_%H-%M-%S")' >> run.sh
echo '' >> run.sh
echo '# manage run.log and run_archive.log' >> run.sh
echo 'touch run_archive.log || true' >> run.sh
echo 'echo "" >> run_archive.log' >> run.sh
echo 'echo "============================================================" >> run_archive.log' >> run.sh
echo 'echo "" >> run_archive.log' >> run.sh
echo 'cat run.log >> run_archive.log' >> run.sh
if [[ $ADD_SLEEP_COMMAND == "yes" ]]
then
  echo "" >> run.sh
  echo '# sleep command for allowing boot up' >> run.sh
  echo "sleep 30" >> run.sh
  echo "" >> run.sh
fi
echo '' >> run.sh
echo '# program start and debugging messages' >> run.sh
echo 'echo "Starting run.sh at $DATE as $USER" > run.log' >> run.sh
echo 'echo "$MSG_WHEN_STARTING_PROGRAM" >> run.log' >> run.sh
echo "pwd >> run.log" >> run.sh
echo '' >> run.sh
echo 'LSHWNET=$(lshw -C network 2> /dev/null)' >> run.sh
echo 'if [[ "$LSHWNET"'" = *\"Wireless interface\"* ]]" >> run.sh
echo 'then' >> run.sh
echo '    echo "USB wifi adapter found" >> run.log' >> run.sh
echo 'else' >> run.sh
echo '    echo "USB wifi adapter not found!" >> run.log' >> run.sh
echo 'fi' >> run.sh
echo 'echo "Network configuration:" >> run.log' >> run.sh
echo 'ifconfig -a >> run.log 2>> run.log || true' >> run.sh
echo '' >> run.sh
echo '# check for newer versions' >> run.sh
echo 'echo "Pulling latest version from server..." >> run.log' >> run.sh
echo "git pull >> run.log 2>> run.log || true" >> run.sh
echo 'echo "Finished pulling latest version from server. Booting node-dj..." >> run.log' >> run.sh
echo '' >> run.sh
echo '# run the program' >> run.sh
if [[ $SET_MAX_OLD_SPACE_SIZE_PARAM == "setparam" ]]
then
  echo '# set param to solve mystery bug in npm install' >> run.sh
  echo 'export NODE_OPTIONS="--max-old-space-size=8192"' >> run.sh
fi
echo "npm run start \"/\" \"$LIBRARY_PATH\" >> run.log 2>> run.log" >> run.sh
chmod +x run.sh

# How to start program at boot time
if [[ $MECHANISM_FOR_RUNNING_AT_BOOT_TIME == "cron" ]]
then
	echo "Please enter into crontab:"
  echo "SHELL=/bin/bash"
  echo "'@reboot /home/$TARGET_USER/node-dj/run.sh'"
  echo "Press enter to continue..."
  read UNUSED
  crontab -e
  sudo update-rc.d cron defaults # activate crontab (will prompt for password)
else
  echo "Setting up systemd..."
  SYSTEMD_SERVICE_FILE="/etc/systemd/system/nodedj.service"
  sudo touch $SYSTEMD_SERVICE_FILE
  sudo sh -c "echo \"[Unit]\" >> $SYSTEMD_SERVICE_FILE"

  sudo sh -c "echo \"Description=Jukebox for playing music\" >> $SYSTEMD_SERVICE_FILE"
  sudo sh -c "echo \"After=network.target\" >> $SYSTEMD_SERVICE_FILE"

  sudo sh -c "echo \"[Service]\" >> $SYSTEMD_SERVICE_FILE"
  sudo sh -c "echo \"ExecStart=/bin/bash /home/altin/node-dj/run.sh\" >> $SYSTEMD_SERVICE_FILE"
  sudo sh -c "echo \"RestartSec=10\" >> $SYSTEMD_SERVICE_FILE"
  sudo sh -c "echo \"User=$TARGET_USER\" >> $SYSTEMD_SERVICE_FILE"

  sudo sh -c "echo \"[Install]\" >> $SYSTEMD_SERVICE_FILE"
  sudo sh -c "echo \"WantedBy=default.target\" >> $SYSTEMD_SERVICE_FILE"
  sudo systemctl enable nodedj
fi

# Set volume to unmute and 100% at boot time
if [[ $SET_VOLUME_AT_BOOT_TIME == "yes" ]]
then
	echo "Please enter into crontab:"
  echo "SHELL=/bin/bash"
  echo "'@reboot amixer -c 0 set Master playback 99% unmute'"
  echo "Press enter to continue..."
  read UNUSED
  crontab -e
  sudo update-rc.d cron defaults # activate crontab (will prompt for password)
fi

echo "Do you want to write ~/.asoundrc to avoid playback errors when switching songs?"
echo "Type \"yes\" to continue"
read WRITE_ASOUNDRC
if [[ $WRITE_ASOUNDRC == "yes" ]]
then
  rm /home/$TARGET_USER/.asoundrc 2> /dev/null || true
  touch /home/$TARGET_USER/.asoundrc 2> /dev/null || true
  echo "pcm.!default {" >> /home/$TARGET_USER/.asoundrc
  echo "        type hw" >> /home/$TARGET_USER/.asoundrc
  echo "        card 1" >> /home/$TARGET_USER/.asoundrc
  echo "}" >> /home/$TARGET_USER/.asoundrc
  echo "" >> /home/$TARGET_USER/.asoundrc
  echo "ctl.!default {" >> /home/$TARGET_USER/.asoundrc
  echo "        type hw" >> /home/$TARGET_USER/.asoundrc
  echo "        card 0" >> /home/$TARGET_USER/.asoundrc
  echo "}" >> /home/$TARGET_USER/.asoundrc
	echo "Finished writing ~/.asoundrc"
fi

echo "Are you running the program on Ubuntu mate for raspberry?"
echo "Type \"yes\" to continue"
read IS_UBUNTU_RPI
if [[ $IS_UBUNTU_RPI == "yes" ]]
then
	echo "Continuing with ubuntu mate raspberry specific setup"
else
  echo "Finished setup."
	exit 0
fi

#
# FROM HERE ON: UBUNTU MATE FOR RASPBERRY SPECIFIC!
#

# see dedoimedo.com/computers/rpi4-ubuntu-mate-audio.html
echo "Add the following line to /boot/firmware/usercfg.txt"
echo "dtparam=audio=on"
echo "Press enter to edit file"
read UNUSED
sudo vim /boot/firmware/usercfg.txt

sudo usermod -a -G audio "$TARGET_USER"

# aplay -l # for checking alsa device list

# not necessary, sound already working.
# 1 for headphones, but gives error:
# amixer: cannot find the given element from control default
# sudo amixer cset numid=3 1

# not necessary, sound already working.
# as seen on raspberrypi.stackexchange.com/questions/113997/sound-output-stuck-on-hdmi-working
# echo "Add the following line"
# echo "hdmi_ignore_edid_audio=1"
# echo "Press enter to continue"
# read UNUSED
# sudo vim /boot/config.txt

# see stackoverflow.com/questions/62585077/how-do-i-get-amixer-pcm-numid-3-to-work-on-raspberry-pi-4
# sudo bash -c 'echo -e " defaults.pcm.card 1 \ndefaults.ctl.card 1"> /etc/asound.conf'