blogker/aux/pull-n-build.sh

#!/bin/sh

# stop on error
set -e -v

{
	# Log date
	date

	# check if initial git run
	if [ "$REPO_URL" == "" ]; then
		# no repo URL set.
		# most likely the repo is passed through as volume
		# do not pull, treat the repo as-is
		true
	else
		# repo URL set
		if [ -d /repo ]; then
			# repo already exists, try to pull
			cd /repo && git pull --recurse-submodules
			if [ "$?" -ne 0 ]; then
				# pull failed, clean and retry to clone
				echo "Pull failed, attempting to clean clone"
				rm -rf /repo
			fi
		fi
		if [ ! -d /repo ]; then
			# repo needs to be cloned
			# check if there is a specific branch to clone
			if [ ! "$REPO_BRANCH" == "" ]; then
				BRANCHCMD="--branch $REPO_BRANCH"
			fi
			git clone --recurse-submodules $BRANCHCMD $REPO_URL /repo
		fi
	fi

	# create temporary working directory
	tmpdir=$(mktemp --directory)
	# copy over into temporary directory
	cp -r /repo/* $tmpdir

	# build and copy over
	cd $tmpdir && \
	hugo && \
	rm -rf /usr/share/nginx/html/* && \
	cp -R $tmpdir/public/* /usr/share/nginx/html && \
	chown nginx:nginx -R /usr/share/nginx/html

	# cleanup
	rm -rf $tmpdir

} 2>&1 | tee /var/log/blogker-pull-n-build.log