docker-entrypoint.sh

#!/usr/bin/env bash
# based on https://github.com/docker-library/ghost/blob/master/2/alpine/docker-entrypoint.sh

# A better class of script
set -o errexit          # Exit on most errors (see the manual)
set -o errtrace         # Make sure any error trap is inherited
set -o nounset          # Disallow expansion of unset variables
set -o pipefail         # Use last non-zero exit code in a pipeline
#set -o xtrace          # Trace the execution of the script (debug)

# allow the container to be started with `--user`
if [[ "$*" == node*current/index.js* ]] && [ "$(id -u)" = '0' ]; then
	find "$GHOST_CONTENT" \! -user node -exec chown node '{}' +
	exec su-exec node "$BASH_SOURCE" "$@"
fi

if [[ "$*" == node*current/index.js* ]]; then
	baseDir="$GHOST_INSTALL/content.orig"
	for src in "$baseDir"/*/ "$baseDir"/themes/*; do
		src="${src%/}"
		target="$GHOST_CONTENT/${src#$baseDir/}"
		mkdir -p "$(dirname "$target")"
		if [ ! -e "$target" ]; then
			tar -cC "$(dirname "$src")" "$(basename "$src")" | tar -xC "$(dirname "$target")"
		fi
	done
fi

exec "$@"