Script to install Spreed WebRTC. Will not work by itself.

install_spreed_webrtc.sh

#!/bin/bash

# The repo for Spreed WebRTC will not work, therefore:
ASK_INSTALL_SPREED=2

CPUS=$(grep ^processor /proc/cpuinfo | wc -l)

do_install_spreed_webrtc() {
  if [ -f $LOCK_DIR/spreed_webrtc-installed.lock ]; then
    echo && echo "Spreed WebRTC is already installed and configured. Continuing..." && echo && sleep 1
  else
    # https://help.nextcloud.com/t/install-collabora-and-spreed-me/9532/6
    # https://www.c-rieger.de/enable-spreed-me-in-nextcloud/
    do_ask_install_go
    do_ask_install_nodejs
    do_ask_install_spreed
    
    # First we gonna make go available on our system.
    if [[ $ASK_INSTALL_GO -eq 0 ]]; then
      apt-get$QUIET_APT install -y golang-go
    else
      VERSION_GO=go1.8.linux-armv6l
      SOURCE_GO=https://storage.googleapis.com/golang/
      GPATH=/usr/local/src
      do_install_go_source
    fi
    go version
    
    # Node.js
    if [[ $ASK_INSTALL_NODE -eq 2 ]]; then
      curl -sL https://deb.nodesource.com/setup_7.x | sudo -E bash -
    fi
    apt-get$QUIET_APT install -y git nodejs make automake
    
    
    # Install Spreed WebRTC
    if [[ $ASK_INSTALL_SPREED -eq 0 ]]; then
      apt-get$QUIET_APT install -y software-properties-common
      apt-add-repository ppa:strukturag/spreed-webrtc
      apt-get$QUIET_APT update
      apt-get install spreed-webrtc
    else
      VERSION_SPREED=master
      SOURCE_SPREED=https://github.com/strukturag/spreed-webrtc/archive/
      BPATH=/opt
      do_install_spreed_webrtc_source
      SPREED_ROOT=/opt/spreed-webrtc-$VERSION_SPREED
    fi
    
    # Download the Spreed.ME app, unzip the package, rename it to spreedme and remove the master.zip
    # Name of latest version of the package
    VERSION_SPREED_APP=master
    # URL to the source directory
    SOURCE_SPREED_APP=https://github.com/strukturag/nextcloud-spreedme/archive/
    cd /var/www/nextcloud/apps
    wget -P /var/www/nextcloud/apps $SOURCE_SPREED_APP$VERSION_SPREED_APP.tar.gz
    tar -xzf $VERSION_SPREED_APP.tar.gz
    rm $VERSION_SPREED_APP.tar.gz
    mv nextcloud-spreedme-$VERSION_SPREED spreedme
    
    do_load_php_conf
    OCC="sudo -u www-data $PHP_BIN /var/www/nextcloud/occ"
    $OCC app:enable spreedme
    
    # Configure
    cp $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf.in $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    SHARED_SECRET=$($OCC config:app:get spreedme SPREED_WEBRTC_SHAREDSECRET)
    
    #nano $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    if [[ $ASK_INSTALL_SPREED -eq 2 ]]; then
      sed -i "s~;root = /usr/share/spreed-webrtc-server/www~root = /opt/spreed-webrtc-$VERSION_SPREED~" $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    fi
    sed -i 's~;basePath = /some/sub/path/~basePath = /webrtc/~' $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    sed -i "s/sessionSecret = the-default-secret-do-not-keep-me/sessionSecret = $(openssl rand -hex 32)/" $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    sed -i "s/encryptionSecret = tne-default-encryption-block-key/encryptionSecret = $(openssl rand -hex 32)/" $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    sed -i "s/;authorizeRoomJoin = false/authorizeRoomJoin = true/" $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    sed -i 's~;extra = /usr/share/spreed-webrtc-server/extra~extra = /var/www/nextcloud/apps/spreedme/extra~' $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    sed -i 's~;plugin = extra/static/myplugin.js~plugin = extra/static/owncloud.js~' $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    sed -i 's/;stunURIs = stun:stun.spreed.me:443/stunURIs = stun:stun.spreed.me:443/' $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    sed -i 's/enabled = false/enabled = true/' $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    sed -i 's/;mode = sharedsecret/mode = sharedsecret/' $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    sed -i "s/;sharedsecret_secret = some-secret-do-not-keep/sharedsecret_secret = $SHARED_SECRET/" $BPATH/spreed-webrtc-$VERSION_SPREED/server.conf
    
    
    do_configure_spreed_webrtc_gateway
    
    sleep 1
    #touch $LOCK_DIR/spreed_webrtc-installed.lock
  fi
}

do_install_spreed_webrtc_source() {
  # Compile Spreed WebRTC
  cd $BPATH
  wget -P $BPATH $SOURCE_SPREED$VERSION_SPREED.tar.gz
  tar -xzf $VERSION_SPREED.tar.gz
  rm $VERSION_SPREED.tar.gz
  
  cd $BPATH/spreed-webrtc-$VERSION_SPREED
  ./autogen.sh
  ./configure
  make -j $CPUS
  
  # https://help.nextcloud.com/t/spreed-me-howto-autorun-spreed-webrtc-server-step-by-step/7721
  # Create a system user spreed:www-data, that will be used to start the spreed server later by the systemd unit
  adduser --quiet --system --ingroup "www-data" --home "/opt/spreed-webrtc-$VERSION_SPREED" --no-create-home --disabled-login "spreed" 2>/dev/null || true
  
  # Create a log file and chown it to our new user to be able to write it
  touch /var/log/spreed.log
  chown spreed:www-data /var/log/spreed.log
  
  #We will now make the whole spreed server directory executable to the user.
  #It might be possible to just make a few files executable, but at least the two binaries in server root and /bin, as well as the folders itself are not enough.
  chmod -R 755 /opt/spreed-webrtc-$VERSION_SPREED
  
  # Now we will create the environment file for the systemd script, adding the information about the user, files and folders we just created:
  #nano /etc/default/spreed
  cat > /etc/default/spreed << EOF
      # Defaults for spreed-webrtc initscripts
WEBRTC_USER='spreed'
WEBRTC_GROUP='www-data'
WEBRTC_CONF='/opt/spreed-webrtc-$VERSION_SPREED/server.conf'
WEBRTC_LOG='/var/log/spreed.log'
WEBRTC_GOMAXPROCS=1
WEBRTC_NOFILE=1024
EOF
  # Create the systemd unit itself and enable it to establish the service
  #nano /etc/systemd/system/spreed.service
  cat > /etc/systemd/system/spreed.service << EOF
[Unit]
Description=Spreed WebRTC server
After=network.target

[Service]
Type=simple
EnvironmentFile=/etc/default/spreed
# TODO: These values should come from the EnvironmentFile.
Environment=GOMAXPROCS=1
LimitNOFILE=1024
User=spreed
Group=www-data
PermissionsStartOnly=true
ExecStart=/opt/spreed-webrtc-$VERSION_SPREED/bin/spreed-webrtc-server -c ${WEBRTC_CONF} -l ${WEBRTC_LOG}
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF
  systemctl enable spreed.service
  
  ## Add the init script
  #wget -O /etc/init.d/spreed-webrtc https://github.com/spreedbox-packaging/spreed-webrtc-debian/raw/5837478fd33089bc7cc8a4323ed736a669b60b7a/debian/spreed-webrtc.init.d
  #sed -i "s~/usr/local/php7~$PHP7_DIR~g" /etc/init.d/php7-fpm
  #chmod +x /etc/init.d/spreed-webrtc
  #
  #wget -O /etc/systemd/system/spreed-webrtc.service https://github.com/spreedbox-packaging/spreed-webrtc-debian/raw/ubuntu/trusty/debian/spreed-webrtc.service
  #sed -i "s~/usr/local/php7~$PHP7_DIR~g" /etc/systemd/system/php-fpm.service
  #
  ## Reload systemd
  #systemctl daemon-reload
  #systemctl enable spreed-webrtc
  ## Start Spreed WebRTC
  #systemctl start spreed-webrtc
}

do_install_go_source() {
  do_ask_username
  mkdir -p $GPATH
  cd $GPATH
  # Download Go
  wget -P $GPATH $SOURCE_GO$VERSION_GO.tar.gz
  tar -xzf $VERSION_GO.tar.gz
  mv $GPATH/go/ /usr/local
  #nano /etc/profile
  sed -i 's~export PATH~PATH=$PATH:/usr/local/go/bin\nexport PATH~g' /etc/profile
  export PATH=$PATH:/usr/local/go/bin
}

do_configure_spreed_webrtc_gateway() {
  if [ ! -f $LOCK_DIR/configure_gateway-installed.lock ]; then
    echo && echo "Please try configuring Spreed WebRTC gateway again after setting up the gateway. Skipping..." && echo && sleep 1
  elif [ -f $LOCK_DIR/spreed_webrtc-gateway-installed.lock ]; then
    echo && echo "Spreed WebRTC gateway is already installed and configured. Continuing..." && echo && sleep 1
  else
    #nano /etc/nginx/conf.d/gateway.conf
    ex /etc/nginx/conf.d/gateway.conf << END_EX_COMMANDS
" Find the mark
/NEW_SITE
" Delete the marker line
d
" Add the complex, multi-line text
a
    #### Spreed WebRTC ####
    location ^~ /webrtc {
        proxy_pass http://127.0.0.1:8080;
        proxy_http_version 1.1;
        proxy_set_header Upgrade \$http_upgrade;
        proxy_set_header Connection \$connection_upgrade;
        proxy_set_header X-Forwarded-Proto \$scheme;
        proxy_set_header Host \$http_host;
        proxy_set_header X-Real-IP \$remote_addr;
        proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
        proxy_buffering             on;
        proxy_ignore_client_abort   off;
        proxy_redirect              off;
        proxy_connect_timeout       90;
        proxy_send_timeout          90;
        proxy_read_timeout          90;
        proxy_buffer_size           4k;
        proxy_buffers               4 32k;
        proxy_busy_buffers_size     64k;
        proxy_temp_file_write_size  64k;
        proxy_next_upstream         error timeout invalid_header http_502 http_503 http_504;
    }
    
    
    # NEW_SITE
    
.
" The '.' terminates the a-command. Write out changed file.
w!
q
END_EX_COMMANDS
    service nginx restart && service spreed restart
    
    sleep 1
    touch $LOCK_DIR/spreed_webrtc-gateway-installed.lock
  fi
}