examples: move go.work creation to root (#378)

We only need a single go.work file in the reposotory, and `go work use -r .`
can recursively add all sub-modules to it, without requiring bash iteration.

Moves the creation of go.work into the root Makefile
go.work is still in .gitignore so it won't be committed

Fixes #375

Makefile

@@ -52,3 +52,8 @@ clean-lint-cache:
 build-examples:
 	for example in $(shell find ./examples -mindepth 1 -maxdepth 1 -type d); do \
 		(cd $$example; echo Build $$example; go mod tidy; go build -o /dev/null) || exit 1; done
+
+.PHONY: add-go-work
+add-go-work:
+	go work init .
+	go work use -r .

examples/Makefile

@@ -4,14 +4,6 @@ SYNC_REF?=main
 sync: ## Sync all go.mod files
 	@sh .update-all-to-latest.sh ${SYNC_REF}
 
-.PHONY: add-go-work-files
-add-go-work-files: ## Add go work files to all examples
-	find . -name go.mod -execdir sh -c 'go work init && go work use . && go work use ../..' \;
-
-.PHONY: rm-go-work-files
-rm-go-work-files: ## Add go work files to all examples
-	rm -f ./*/go.work*
-
 .PHONY: install-all
 install-all: ## Add go work files to all examples
 	@find . -name go.mod -execdir go install \;