demo_preparation

README.md

Basic tooling for cool demos

Installation

sh install.sh

How to use

demo.sh YOUR_SCRIPT > YOUR_SCRIPT_WITH_DEMO

then edit the generated script to put description of your tasks and you can then run your modified script as a demo

demo.sh

#!/bin/bash

if [ "$#" != "1" ] ; then
    echo Usage: $0 script
    exit 1
fi

echo \#!/bin/bash
echo
echo source `which util.sh`
echo

cat $1 |  while read line ; do
    line=`echo $line | sed 's/\"/\\\"/g'`
    echo backtotop
    echo desc \"\"
    echo run \"$line\"
    echo
done

install.sh

#!/bin/bash
INSTALL="${INSTALL:-/usr/bin}"
mv util.sh $INSTALL
chmod 700 $INSTALL/util.sh
mv demo.sh $INSTALL
chmod 700 $INSTALL/demo.sh
if [ -d /Users ] ; then
brew install pv asciinema
else
mv pv.repo /etc/yum.repos.d
yum --nogpgcheck -y install pv asciinema
grep -q CentOS /etc/redhat-release && yum -y install epel-release && yum --nogpgcheck -y install asciinema
fi
which asciinema && asciinema auth

pv.repo

[ivarch]
name=RPMs from ivarch.com
baseurl=http://www.ivarch.com/programs/rpms/$basearch/
enabled=1

util.sh

#!/bin/bash

readonly  reset=$(tput sgr0)
readonly  green=$(tput bold; tput setaf 2)
readonly yellow=$(tput bold; tput setaf 3)
readonly   blue=$(tput bold; tput setaf 6)

function desc() {
    maybe_first_prompt
    echo "$blue# $@$reset"
    prompt
}

function prompt() {
    echo -n "$yellow\$ $reset"
}

started=""
function maybe_first_prompt() {
    if [ -z "$started" ]; then
        prompt
        started=true
    fi
}

function backtotop() {

    clear
}

function run() {
    maybe_first_prompt
    rate=25
    if [ -n "$DEMO_RUN_FAST" ]; then
      rate=1000
    fi
    echo "$green$1$reset" | pv -qL $rate
    if [ -n "$DEMO_RUN_FAST" ]; then
      sleep 0.5
    fi
    eval "$1"
    r=$?
    read -d '' -t 1 -n 10000 # clear stdin
    prompt
    if [ -z "$DEMO_AUTO_RUN" ]; then
      read -s
    fi
    return $r
}

function relative() {
    for arg; do
        echo "$(realpath $(dirname $(which $0)))/$arg" | sed "s|$(realpath $(pwd))|.|"
    done
}

trap "echo" EXIT