update Makefile to use Dune Developer Preview

Author: sabine

Makefile

@@ -1,74 +1,61 @@
 .DEFAULT_GOAL := all
 
 .PHONY: all
-all:
-	opam exec -- dune build --root .
+all: dune.lock
+	dune build --root .
 
-.PHONY: deps
-deps: create_switch ## Install development dependencies
-	opam install -y ocamlformat=0.26.2 ocaml-lsp-server
-	opam install -y --deps-only --with-test --with-doc .
-
-.PHONY: create_switch
-create_switch: ## Create switch and pinned opam repo
-	opam switch create . 5.2.0 --no-install --repos pin=git+https://github.com/ocaml/opam-repository#584630e7a7e27e3cf56158696a3fe94623a0cf4f
-
-.PHONY: switch
-switch: deps ## Create an opam switch and install development dependencies
-
-.PHONY: lock
-lock: ## Generate a lock file
-	opam lock -y .
+dune.lock: ## Generate a lock file
+	dune pkg lock
 
 .PHONY: build
-build: ## Build the project, including non installable libraries and executables
-	opam exec -- dune build --root .
+build: dune.lock ## Build the project, including non installable libraries and executables
+	dune build --root .
 
 .PHONY: playground
 playground:
 	make build -C playground
 
 .PHONY: install
 install: all ## Install the packages on the system
-	opam exec -- dune install --root .
+	dune install --root .
 
 .PHONY: start
 start: all ## Run the produced executable
-	opam exec -- dune exec src/ocamlorg_web/bin/main.exe
+	dune exec src/ocamlorg_web/bin/main.exe
 
 .PHONY: test
 test: ## Run the unit tests
-	opam exec -- dune build --root . @runtest
+	dune build --root . @runtest
 
 .PHONY: clean
 clean: ## Clean build artifacts and other generated files
-	opam exec -- dune clean --root .
+	dune clean --root .
 
 .PHONY: doc
 doc: ## Generate odoc documentation
-	opam exec -- dune build --root . @doc
+	dune build --root . @doc
 
 .PHONY: fmt
 fmt: ## Format the codebase with ocamlformat
-	opam exec -- dune build --root . --auto-promote @fmt
+	dune build --root . --auto-promote @fmt
 
 .PHONY: watch
 watch: ## Watch for the filesystem and rebuild on every change
-	opam exec -- dune build @run -w --force --no-buffer
+	dune build @run -w --force --no-buffer
 
 .PHONY: utop
 utop: ## Run a REPL and link with the project's libraries
-	opam exec -- dune utop --root . . -- -implicit-bindings
+	dune utop --root . . -- -implicit-bindings
 
 .PHONY: scrape
 scrape: ## Generate the po files
-	opam exec -- dune exec --root . tool/ood-gen/bin/scrape.exe planet
-	opam exec -- dune exec --root . tool/ood-gen/bin/scrape.exe video
+	dune exec --root . tool/ood-gen/bin/scrape.exe planet
+	dune exec --root . tool/ood-gen/bin/scrape.exe video
 
 .PHONY: docker
 docker: ## Generate docker container
 	docker build -f Dockerfile . -t ocamlorg:latest
 
 .PHONY: linkcheck
 linkcheck:
-	opam exec -- dune exec --root . olinkcheck md data
+	dune exec --root . olinkcheck md data