switch to dune and fix compilation

.gitignore

@@ -1,23 +1,5 @@
-*.annot
-*.cmo
-*.cma
-*.cmi
-*.a
-*.o
-*.cmx
-*.cmxs
-*.cmxa
-
-# ocamlbuild working directory
 _build/
-
-# ocamlbuild targets
-*.byte
-*.native
-
-# oasis generated files
-setup.data
-setup.log
+.merlin
 
 /mlgrope
 /img/src

.ocamlformat

@@ -0,0 +1,16 @@
+version=0.11.0
+break-sequences=true
+doc-comments=before
+field-space=loose
+let-and=sparse
+sequence-style=terminator
+type-decl=sparse
+wrap-comments=true
+if-then-else=k-r
+let-and=sparse
+space-around-records
+space-around-lists
+space-around-arrays
+cases-exp-indent=2
+max-indent=2
+break-cases=all

Makefile

@@ -1,18 +1,11 @@
-OCAMLC ?= ocamlc
-CFLAGS = -thread
-CMAS = graphics.cma unix.cma threads.cma
-MODULES = util image math2d collide mlgrope backend frontend level player editor menu
-CMIS = $(MODULES:=.cmi)
-CMOS = $(MODULES:=.cmo) main.cmo
+all:
+	dune build @all
+	cp _build/default/src/main.exe mlgrope
 
-all: mlgrope
 clean:
-	rm -rf mlgrope *.cmo *.cmi
-.PHONY: all clean
+	dune clean
+
+indent:
+	ocamlformat -i src/*.ml
 
-%.cmi: %.mli
-	$(OCAMLC) $(CFLAGS) -c $<
-%.cmo: %.ml $(CMIS)
-	$(OCAMLC) $(CFLAGS) -c $<
-mlgrope: $(CMOS)
-	$(OCAMLC) $(CFLAGS) -o $@ $(CMAS) $^
+.PHONY: all clean

README.md

@@ -6,7 +6,7 @@ Cut the Rope - MLG version
 
 ## Building
 
-Requires Linux and OCaml 4.04+.
+Requires Linux, OCaml 4.04+ and dune.
 
 ```shell
 make