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>

Author: KevinOConnor

docs/Installation.md

@@ -16,40 +16,29 @@ Raspberry Pi computer. Use OctoPi v0.13.0 or later - see the
 [octopi releases](https://github.com/guysoft/OctoPi/releases) for
 release information. One should verify that OctoPi boots and that the
 OctoPrint web server works. After connecting to the OctoPrint web
-page, follow the prompt to upgrade OctoPrint to v1.3.0 or later.
+page, follow the prompt to upgrade OctoPrint to v1.3.2 or later.
 
 After installing OctoPi and upgrading OctoPrint, ssh into the target
 machine (ssh pi@octopi -- password is "raspberry") and run the
 following commands:
 
 ```
-sudo apt-get update
-sudo apt-get install libncurses-dev libusb-dev
-sudo apt-get install avrdude gcc-avr binutils-avr avr-libc # AVR toolchain
-sudo apt-get install bossa-cli libnewlib-arm-none-eabi # ARM toolchain
-```
-
-The host software (Klippy) requires a one-time setup - run as the
-regular "pi" user:
-
-```
-virtualenv ~/klippy-env
-~/klippy-env/bin/pip install cffi==1.6.0 pyserial==3.2.1 greenlet==0.4.10
+git clone https://github.com/KevinOConnor/klipper
+./klipper/scripts/install-octopi.sh
 ```
 
-Building Klipper
-================
-
-To obtain Klipper, run the following command on the target machine:
+The above will download Klipper, install some system dependencies,
+setup Klipper to run at system startup, and start the Klipper host
+software. It will require an internet connection and it may take a few
+minutes to complete.
 
-```
-git clone https://github.com/KevinOConnor/klipper
-cd klipper/
-```
+Building the micro-controller code
+==================================
 
 To compile the micro-controller code, start by configuring it:
 
 ```
+cd ~/klipper/
 make menuconfig
 ```
 
@@ -118,21 +107,10 @@ Enter the Settings tab again and under "Serial Connection" change the
 "Serial Port" setting to "/tmp/printer". Change the Baudrate field to
 250000 (this buad rate field is not related to the firmware baudrate
 and may be safely left at 250000). Unselect the "Not only cancel
-ongoing prints but also disconnect..." checkbox.
-
-Running the host software
-=========================
-
-The host software is executed by running the following as the regular
-"pi" user:
-
-```
-~/klippy-env/bin/python ~/klipper/klippy/klippy.py ~/printer.cfg -l /tmp/klippy.log < /dev/null > /dev/null 2>&1 &
-```
+ongoing prints but also disconnect..." checkbox. Click "Save".
 
-Once Klippy is running, use a web-browser and navigate to the
-OctoPrint web site. Under the "Connection" tab (on the left of the
-main page) make sure the "Serial Port" is set to "/tmp/printer" and
+From the main page, under the "Connection" window (at the top left of
+the page) make sure the "Serial Port" is set to "/tmp/printer" and
 click "Connect". (If "/tmp/printer" is not an available selection then
 try reloading the page.)
 
@@ -142,7 +120,9 @@ the Klippy config file was successfully read, and the micro-controller
 was successfully found and configured, then this command will report
 that the printer is ready. Klippy reports error messages via this
 terminal tab. The "status" command can be used to re-report error
-messages.
+messages. The default Klipper startup script also places a log in
+**/tmp/klippy.log** which may provide more detailed information should
+an error occur.
 
 In addition to common g-code commands, Klippy supports a few extended
 commands - "status" is an example of one of these commands. Use the

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