nginx-proxy-manager/docker/rootfs/bin/handle-ipv6-setting

#!/bin/bash

# This command reads the `DISABLE_IPV6` env var and will either enable
# or disable ipv6 in all nginx configs based on this setting.

# Lowercase
DISABLE_IPV6=$(echo "${DISABLE_IPV6:-}" | tr '[:upper:]' '[:lower:]')

CYAN='\E[1;36m'
BLUE='\E[1;34m'
YELLOW='\E[1;33m'
RED='\E[1;31m'
RESET='\E[0m'

FOLDER=$1
if [ "$FOLDER" == "" ]; then
	echo -e "${RED}❯ $0 requires a absolute folder path as the first argument!${RESET}"
	echo -e "${YELLOW}  ie: $0 /data/nginx${RESET}"
	exit 1
fi

FILES=$(find "$FOLDER" -type f -name "*.conf")
if [ "$DISABLE_IPV6" == "true" ] || [ "$DISABLE_IPV6" == "on" ] || [ "$DISABLE_IPV6" == "1" ] || [ "$DISABLE_IPV6" == "yes" ]; then
	# IPV6 is disabled
	echo "Disabling IPV6 in hosts"
	echo -e "${BLUE}❯ ${CYAN}Disabling IPV6 in hosts: ${YELLOW}${FOLDER}${RESET}"

	# Iterate over configs and run the regex
	for FILE in $FILES
	do
		echo -e "  ${BLUE}❯ ${YELLOW}${FILE}${RESET}"
		sed -E -i 's/^([^#]*)listen \[::\]/\1#listen [::]/g' "$FILE"
	done

else
	# IPV6 is enabled
	echo -e "${BLUE}❯ ${CYAN}Enabling IPV6 in hosts: ${YELLOW}${FOLDER}${RESET}"

	# Iterate over configs and run the regex
	for FILE in $FILES
	do
		echo -e "  ${BLUE}❯ ${YELLOW}${FILE}${RESET}"
		sed -E -i 's/^(\s*)#listen \[::\]/\1listen [::]/g' "$FILE"
	done

fi