refactor: autogenerate metrics docs

Signed-off-by: Alan Clucas <[email protected]>

Makefile

@@ -471,7 +471,7 @@ lint: server/static/files.go $(GOPATH)/bin/golangci-lint
 
 # for local we have a faster target that prints to stdout, does not use json, and can cache because it has no coverage
 .PHONY: test
-test: server/static/files.go
+test: server/static/files.go util/telemetry/metrics_list.go util/telemetry/attributes.go
 	go build ./...
 	env KUBECONFIG=/dev/null $(GOTEST) ./...
 	# marker file, based on it's modification time, we know how long ago this target was run
@@ -632,8 +632,12 @@ clean:
 	go clean
 	rm -Rf test-results node_modules vendor v2 v3 argoexec-linux-amd64 dist/* ui/dist
 
-# swagger
+# Built telemetry files
+util/telemetry/metrics_list.go util/telemetry/attributes.go docs/metrics.md: util/telemetry/builder/builder.go util/telemetry/builder/values.yaml
+	@echo Rebuilding telemetry files
+	cd util/telemetry/builder && go run .
 
+# swagger
 pkg/apis/workflow/v1alpha1/openapi_generated.go: $(GOPATH)/bin/openapi-gen $(TYPES)
 	# These files are generated on a v3/ folder by the tool. Link them to the root folder
 	[ -e ./v3 ] || ln -s . v3