WD=/var/lib/dags/rsync_letsencrypt

SYNC=$(WD)/synced_files
NGINX_RELOAD=$(WD)/nginx_reload

.PHONY: all refresh_pg

all: $(SYNC) $(NGINX_RELOAD) refresh_pg

LETSENCRYPT_PATH=/mnt/letsencrypt

###############################################################################
# Fetch the certificates from my remote server using rsync
#
# The combination of `--info=NAME` and pipe into `ifne tee` means this target will
# be updated only if new files have been synced.
# If new files have been synced, their paths will be stored to the target.
# This way, the other targets will run only when some certificate has been
# updated.

REMOTE_LETSENCRYPT_PATH=rsync://user@caladan/letsencrypt
RSYNCD_PASSWD=/mnt/secrets/rsyncd_password
RSYNC_OPTS=--archive --delete --acls --xattrs --compress --human-readable

$(SYNC):
	mkdir -p $(@D)
	rsync \
		$(RSYNC_OPTS) \
		--info=NAME \
		--password-file=$(RSYNCD_PASSWD) \
		$(REMOTE_LETSENCRYPT_PATH) \
		$(LETSENCRYPT_PATH) | \
	ifne tee $@

###############################################################################
# Reload the nginx instance running on my reverse proxy docker-compose service
# so that it uses the new certificates.
# The target is just an empty sentinel target with no meaningful data other
# than its modification date

NGINX_COMPOSE_FILE=/srv/services/reverse_proxy/docker-compose.yml

$(NGINX_RELOAD): $(SYNC)
	mkdir -p $(@D)
	docker-compose \
		--file $(NGINX_COMPOSE_FILE) \
		exec nginx \
		nginx -s reload
	touch $@

###############################################################################
# Copy the certificate for the postgresql domain to the folder where postgre
# service expects it
# After running the fetch_certs target, the postgresql fullchain.pem and
# privkey.pem should be available. Copy those to the postgre SSL folder.

PG_DOMAIN=pg.monotremata.xyz
PG_SSL_PATH=/mnt/docker_volumes/postgres/ssl

$(LETSENCRYPT_PATH)/live/$(PG_DOMAIN)/fullchain.pem: $(SYNC)
$(LETSENCRYPT_PATH)/live/$(PG_DOMAIN)/privkey.pem: $(SYNC)

$(PG_SSL_PATH)/server.crt: $(LETSENCRYPT_PATH)/live/$(PG_DOMAIN)/fullchain.pem
	mkdir -p $(@D)
	rsync --copy-links $< $@

$(PG_SSL_PATH)/server.key: $(LETSENCRYPT_PATH)/live/$(PG_DOMAIN)/privkey.pem
	mkdir -p $(@D)
	rsync --copy-links $< $@

refresh_pg: $(PG_SSL_PATH)/server.crt $(PG_SSL_PATH)/server.key