#! /bin/zsh
#
# this file:
#   https://dataswamp.org/~incal/conf/.zsh/terror
#
#      --------------------------------------
#      terror-3 - the Lisp terror
#      Emacs on the Lego Mindstorms ev3 droid
#      by Emanuel Berg <incal@dataswamp.org>
#      https://dataswamp.org/~incal/#terror
#      updated 2022-11-17
#      --------------------------------------
#
# droid photos:
#   https://dataswamp.org/~incal/terror-3/img/terror-3.jpg
#   https://dataswamp.org/~incal/terror-3/img/terror.jpg
#
# interface screenshot:
#   https://dataswamp.org/~incal/terror-3/img/terror-cmd-loop.png
#
# project history and source:
#   terror    C       https://dataswamp.org/~incal/terror/
#   Terror 2  Prolog  https://dataswamp.org/~incal/terror-2/
#   terror-3  Elisp   https://dataswamp.org/~incal/terror-3/
#
# hardware notes:
#   https://dataswamp.org/~incal/terror-3/PORTS
#   https://dataswamp.org/~incal/terror-3/FILES
#
# facts for fans:
#   The droid is named Terror after a vehicle in the
#   Jules Verne novel "Master of the World", 1904.
#
# tramp:
#   (find-file "/-:incal@ev3dev:.zshrc")
#   (find-file "/-:incal@ev3dev:.irssi/config")
#
# setup ssh:
#
#   1. Verify that the droid is connected to WiFi as shown on
#      the brick's screen under "Wireless and Networks".
#      Note that it should say "Online" and not "Connected".
#
#   2. Then set up a shared connection from your computer:
#
#        $ nmcli                        # get MAC
#        $ nmcli con show               # check for existent connection
#        $ nmcli con edit type ethernet # edit Ethernet connection
#        nmcli> set con.id terror-net
#        nmcli> set 802-3-ethernet.mac-address A8:5E:45:55:AB:6B
#        nmcli> set ipv4.method shared
#        nmcli> verify
#        nmcli> save
#        nmcli> quit
#
# compile, rsync, and ssh:
#
#   $ compile-droid
#   $ rsync-droid-all
#   $ ssh-droid
#
#   (Do all three with 'all-droid'.)
#
# inhibit the password, which is "maker":
#
#   $ ssh-keygen -t rsa
#   $ ssh incal@ev3dev mkdir -p .ssh
#   $ cat ~/.ssh/id_rsa.pub | ssh incal@ev3dev 'cat >> ~/.ssh/authorized_keys'
#
# upgrade ev3dev:
#
#   $ sudo apt-get -qq update # sudo password is "maker"
#   $ sudo apt-get -qq upgrade
#   $ reboot

droid=ev3dev
droid_path=~/terror/terror-3

find-usb-droid () {
    lsusb | grep --color=never Lego
}

ssh-droid-ip () {
    local ip=192.168.10.243
    ssh ${USER}@${ip}
}

compile-droid () {
    make -C $droid_path again
}
alias rac=compile-droid

rsync-droid () {
    rsync -aLv --exclude '*.elc' $@ ${USER}@${droid}:
}

rsync-droid-all () {
    rsync-droid $droid_path
}
alias rad=rsync-droid-all

ssh-droid () {
    ssh ${USER}@${droid}
}
alias tass=ssh-droid

all-droid () {
    compile-droid
    rsync-droid-all
    ssh-droid
}
alias ra=all-droid

find-in-droid-src () {
    local args=($@)
    egrep-in-files $args ${droid_path}/*.el
}
alias gr=find-in-droid-src

dd-ev3dev-iso-to-sd () {
    local iso=$1
    local sd=$2

    sudo dd           \
      bs=4M           \
      if=${iso}       \
      of=${sd}        \
      status=progress \
      oflag=sync
}