Continuous build for erlang (cowboy, erlydtl...)

circus.sh

#!/bin/bash

# the name of your erlang app
APPNAME=yourappname

# we will monitor for any modification in those directories
WATCHEDDIRS="src templates"

# --- Functions

function title {
    echo -en "\033]2;$1\007"
}

function stop_server {
    # kill previous server and tail log
    kill %1 %2 &> /dev/null
    rm -f log/*
}

function ctrl_c {
    echo "** Trapped CTRL-C"
    stop_server
    exit
}

# ---  Start

trap ctrl_c INT TERM EXIT
export LOGIN=`whoami`

echo "Continuous assets build for $APPNAME"
echo "<ctrl>-C to quit."

while true; do
    echo ""

    title "circus build"

    stop_server

    echo ""
    echo "start build..."

    make

    if [ $? == 0 ]
    then
	echo "Start server"

	export RUN_ERL_LOG_MAXSIZE=100000000
	export RUN_ERL_LOG_GENERATIONS=2

	run_erl /tmp/ . "exec erl -pa ebin -pa deps/*/ebin -mnesia dir '\"mnesia\"' -s "$APPNAME"_app -sname "$APPNAME" -setcookie "$APPNAME$LOGIN &

	sleep 1

	tail -f ./erlang.log.1&
    fi

    echo ""
    date +"%k:%M:%S - Wait for source modification in [$WATCHEDDIRS] - Server listening"
    title "circus"

    inotifywait -qr -e modify -e create -e move -e delete $WATCHEDDIRS --exclude "\.\#.*"
done