mwoffliner (Mac OS X)

mwoffliner.sh

#!/usr/bin/env bash
# -----------------------------------------------------------------------------
# https://gist.github.com/eth-p/e96f5214a59f5d2694853da6739580b0
# Copyright (C) 2018 eth-p
#
# SUMMARY:
#    This is a hackjob script to get mwoffliner (openzim/mwoffliner) working on
#    Mac OS X without going through the pain of compiling zimwriterfs and all of
#    its dependencies.
# 
# REQUIREMENTS:
#  - Docker  (brew cask install docker)
#  - Redis   (brew install redis)
#
# USAGE:
#    mwoffliner --mwUrl="https://.../" --adminEmail="[email protected]"
#
# NOTES:
#    A Redis instance and a Docker container will be created automatically.
#    Assuming all goes well, both will be destroyed automatically, too.
# 
# CAVEATS:
#    The mwoffliner --redis option cannot be used.
#    
# -----------------------------------------------------------------------------
# Generate
CONTAINER="mwoffliner-$RANDOM"
REDIS_PORT="15${RANDOM}050"
REDIS_PORT="${REDIS_PORT:0:5}"
REDIS_PASS="$CONTAINER--$RANDOM"

# -----------------------------------------------------------------------------
# Get IP Address
IP=""
IF="en"
IFn=0

while true; do
	# Test Interface
	if ! ifconfig "${IF}${IFn}" &>/dev/null; then
		break
	fi

	# Extract IP
	IP="$(ipconfig getpacket en1 | grep '^yiaddr = [0-9\.]\+' | cut -d' ' -f3)"
	if [ $? -eq 0 ] && [ -n "$IP" ]; then
		break
	fi

	# Next Interface
	((IFn++))
done

# -----------------------------------------------------------------------------
# Try Function
try() {
	"$@"
	if [ "$?" -ne 0 ]; then
		printf "\033[31mAN ERROR HAS OCCURRED:\n%s\n\033[31m%s\n%s\n%s\n%s\n" \
			"COMMAND:     $*" \
			"CONTAINER  = $CONTAINER" \
			"REDIS_PORT = $REDIS_PORT" \
			"REDIS_PID  = $REDIS_PID" \
			"REDIS_PASS = $REDIS_PASS" \
			>&2
	fi
}

# -----------------------------------------------------------------------------
# Cleanup Function
cleanup() {
	if kill -s 0 "$REDIS_PID" &>/dev/null; then
		try kill "$REDIS_PID" >/dev/null
	fi

	try docker container rm "$CONTAINER" >/dev/null
}


trap 'cleanup' SIGINT SIGTERM

# -----------------------------------------------------------------------------
# Run Redis
redis-server - >/dev/null <<END &
save ""
appendfsync no
protected-mode no
port $REDIS_PORT
requirepass "$REDIS_PASS"
pidfile /dev/null
END
REDIS_PID=$!

# -----------------------------------------------------------------------------
# Run Container
docker run \
	--name="$CONTAINER" \
	--mount src="$(pwd)",target="/pwd",type=bind \
	--workdir="/pwd" \
	openzim/mwoffliner \
	mwoffliner --redis "redis://:$REDIS_PASS@$IP:$REDIS_PORT" "$@"

result="$?"
cleanup
exit $result