Use dependencies.Dockerfile for weaver image

Author: MrAlias

Makefile

@@ -103,12 +103,6 @@ $(PYTOOLS)/%: $(PYTOOLS)
 CODESPELL = $(PYTOOLS)/codespell
 $(CODESPELL): PACKAGE=codespell
 
-# Definitions for semconvgen
-DOCKER_USER=$(shell id -u):$(shell id -g)
-# TODO - Pull docker image versions from rennovate-friendly source, e.g.
-# $(shell cat dependencies.Dockerfile | awk '$$4=="weaver" {print $$2}')
-WEAVER_CONTAINER=otel/weaver:v0.12.0
-
 # Generate
 
 .PHONY: generate
@@ -275,6 +269,9 @@ check-clean-work-tree:
 	  exit 1; \
 	fi
 
+# The weaver docker image to use for semconv-generate.
+WEAVER_IMAGE := $(shell awk '$$4=="weaver" {print $$2}' $(DEPENDENCIES_DOCKERFILE))
+
 SEMCONVPKG ?= "semconv/"
 .PHONY: semconv-generate
 semconv-generate: $(SEMCONVKIT)
@@ -292,7 +289,7 @@ semconv-generate: $(SEMCONVKIT)
 		--mount 'type=bind,source=$(PWD)/semconv,target=/home/weaver/templates/registry/go,readonly' \
 		--mount 'type=bind,source=$(PWD)/semconv/${TAG},target=/home/weaver/target' \
 		--mount 'type=bind,source=$(HOME)/.weaver,target=/tmp/weaver/.weaver' \
-		$(WEAVER_CONTAINER) registry generate \
+		$(WEAVER_IMAGE) registry generate \
 		--registry=/source/model \
 		--templates=/home/weaver/templates \
 		--param tag=$(TAG) \

dependencies.Dockerfile

@@ -1,2 +1,3 @@
 # This is a renovate-friendly source of Docker images.
 FROM python:3.13.1-slim-bullseye AS python
+FROM otel/weaver:v0.12.0 AS weaver