68 lines
1.9 KiB
Makefile
68 lines
1.9 KiB
Makefile
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DOMAIN_NAME ?= monotremata.xyz
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RECORD_NAME ?= wg
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WD=/var/lib/dags/ddns
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API_URL = https://api.linode.com/v4
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GET_IP_URL = ifconfig.me/ip
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STATE_DIR = $(WD)/$(RECORD_NAME).$(DOMAIN_NAME)
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HOST_IP = $(STATE_DIR)/host_ip.txt
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DOMAIN_ID = $(STATE_DIR)/domain_id.txt
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RECORD_ID = $(STATE_DIR)/record_id.txt
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UPDATE_RECORD = $(STATE_DIR)/updated_record
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GOPASS=doas -u gopass gopass
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LINODE_TOKEN = $(shell $(GOPASS) linode.com/token)
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CURL = curl --silent
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AUTH_CURL = $(CURL) -H "Authorization: Bearer $(LINODE_TOKEN)"
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define get_id
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jq '.["data"][] | select(.["$(1)"] == "$(2)")["id"]'
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endef
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.PHONY: force clean
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# because the ip state is only updated when the IP changes, we should only need
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# to update the record when that happens
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$(UPDATE_RECORD): $(HOST_IP) $(DOMAIN_ID) $(RECORD_ID)
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@echo "updating record"
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@$(AUTH_CURL) \
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-H "Content-Type: application/json" \
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-X PUT -d '{ "target": "'"$$(cat $<)"'" }' \
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"$(API_URL)/domains/$$(cat $(DOMAIN_ID))/records/$$(cat $(RECORD_ID))"
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@touch $@
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# the domain id should not change and this should only ever need to run once
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$(DOMAIN_ID):
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@echo "fetching domain id"
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@mkdir -p $(@D)
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@$(AUTH_CURL) $(API_URL)/domains | \
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$(call get_id,domain,$(DOMAIN_NAME)) | \
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tee $@
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# the register id should not change and this should only ever need to run once
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$(RECORD_ID): $(DOMAIN_ID)
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@echo "fetching record id"
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@mkdir -p $(@D)
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@$(AUTH_CURL) $(API_URL)/domains/$$(cat $<)/records | \
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$(call get_id,name,$(RECORD_NAME)) | \
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tee $@
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# this target depends on a PHONY so that it is attempted every time, but the
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# target file should only be updated is the current host ip is different to the
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# saved one
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$(HOST_IP): force
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@echo "fetching host IP"
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@mkdir -p $(@D)
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@current_ip=$$($(CURL) $(GET_IP_URL)); \
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echo "$$current_ip"; \
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if [ ! -f $@ ] || [ "$$current_ip" != "$$(cat $@)" ]; then \
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echo "updating stored IP"; \
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echo "$$current_ip" | tee $@; \
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fi
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clean:
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rm -fr $(STATE_DIR)
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