scripts: Add octopi installation scripts

Add a system startup script so that Klipper can automatically start at
boot time.  Create an installation script that will install the system
dependencies and the startup script.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

scripts/install-octopi.sh

@@ -0,0 +1,102 @@
+#!/bin/bash
+# This script installs Klipper on a Raspberry Pi machine running the
+# OctoPi distribution.
+
+PYTHONDIR="${HOME}/klippy-env"
+
+# Step 1: Install system packages
+install_packages()
+{
+    # Packages for python cffi
+    PKGLIST="libffi-dev"
+    # kconfig requirements
+    PKGLIST="${PKGLIST} libncurses-dev"
+    # hub-ctrl
+    PKGLIST="${PKGLIST} libusb-dev"
+    # AVR chip installation and building
+    PKGLIST="${PKGLIST} avrdude gcc-avr binutils-avr avr-libc"
+    # ARM chip installation and building
+    PKGLIST="${PKGLIST} bossa-cli libnewlib-arm-none-eabi"
+
+    # Update system package info
+    report_status "Running apt-get update..."
+    sudo apt-get update
+
+    # Install desired packages
+    report_status "Installing packages..."
+    sudo apt-get install --yes ${PKGLIST}
+}
+
+# Step 2: Create python virtual environment
+create_virtualenv()
+{
+    report_status "Updating python virtual environment..."
+
+    # Create virtualenv if it doesn't already exist
+    [ ! -d ${PYTHONDIR} ] && virtualenv ${PYTHONDIR}
+
+    # Install/update dependencies
+    ${PYTHONDIR}/bin/pip install cffi==1.6.0 pyserial==3.2.1 greenlet==0.4.10
+}
+
+# Step 3: Install startup script
+install_script()
+{
+    report_status "Installing system start script..."
+    sudo cp "${SRCDIR}/scripts/klipper-start.sh" /etc/init.d/klipper
+    sudo update-rc.d klipper defaults
+}
+
+# Step 4: Install startup script config
+install_config()
+{
+    DEFAULTS_FILE=/etc/default/klipper
+    [ -f $DEFAULTS_FILE ] && return
+
+    report_status "Installing system start configuration..."
+    sudo /bin/sh -c "cat > $DEFAULTS_FILE" <<EOF
+# Configuration for /etc/init.d/klipper
+
+KLIPPY_USER=$USER
+
+KLIPPY_EXEC=${PYTHONDIR}/bin/python
+
+KLIPPY_ARGS="${SRCDIR}/klippy/klippy.py ${HOME}/printer.cfg -l /tmp/klippy.log"
+
+EOF
+}
+
+# Step 5: Start host software
+start_software()
+{
+    report_status "Launching Klipper host software..."
+    sudo /etc/init.d/klipper restart
+}
+
+# Helper functions
+report_status()
+{
+    echo -e "\n\n###### $1"
+}
+
+verify_ready()
+{
+    if [ "$EUID" -eq 0 ]; then
+        echo "This script must not run as root"
+        exit -1
+    fi
+}
+
+# Force script to exit if an error occurs
+set -e
+
+# Find SRCDIR from the pathname of this script
+SRCDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )"/.. && pwd )"
+
+# Run installation steps defined above
+verify_ready
+install_packages
+create_virtualenv
+install_script
+install_config
+start_software

scripts/klipper-start.sh

@@ -0,0 +1,54 @@
+#!/bin/sh
+# System startup script for Klipper 3d-printer host code
+
+### BEGIN INIT INFO
+# Provides:          klipper
+# Required-Start:    $local_fs
+# Required-Stop:
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Klipper daemon
+# Description:       Starts the Klipper daemon.
+### END INIT INFO
+
+PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
+DESC="klipper daemon"
+NAME="klipper"
+DEFAULTS_FILE=/etc/default/klipper
+PIDFILE=/var/run/klipper.pid
+
+. /lib/lsb/init-functions
+
+# Read defaults file
+[ -r $DEFAULTS_FILE ] && . $DEFAULTS_FILE
+
+case "$1" in
+start)  log_daemon_msg "Starting klipper" $NAME
+        start-stop-daemon --start --quiet --exec $KLIPPY_EXEC \
+                          --background --pidfile $PIDFILE --make-pidfile \
+                          --chuid $KLIPPY_USER --user $KLIPPY_USER \
+                          -- $KLIPPY_ARGS
+        log_end_msg $?
+        ;;
+stop)   log_daemon_msg "Stopping klipper" $NAME
+        killproc -p $PIDFILE $KLIPPY_EXEC
+        RETVAL=$?
+        [ $RETVAL -eq 0 ] && [ -e "$PIDFILE" ] && rm -f $PIDFILE
+        log_end_msg $RETVAL
+        ;;
+restart) log_daemon_msg "Restarting klipper" $NAME
+        $0 stop
+        $0 start
+        ;;
+reload|force-reload)
+        log_daemon_msg "Reloading configuration not supported" $NAME
+        log_end_msg 1
+        ;;
+status)
+        status_of_proc -p $PIDFILE $KLIPPY_EXEC $NAME && exit 0 || exit $?
+        ;;
+*)      log_action_msg "Usage: /etc/init.d/klipper {start|stop|status|restart|reload|force-reload}"
+        exit 2
+        ;;
+esac
+exit 0