unikernel/duniverse/dune_/test/blackbox-tests/test-cases/overlap-rules-dune.t

@@ -0,0 +1,38 @@
+We demonstrate that users are allowed to generate rules in "private" dune
+directories. That should be forbidden or dune should generate this stuff
+elsewhere.
+
+  $ cat >dune-project <<EOF
+  > (lang dune 3.1)
+  > EOF
+
+  $ cat >dune <<EOF
+  > (dirs :standard .foo.eobjs)
+  > (subdir .foo.eobjs
+  >  (rule (with-stdout-to foo (echo "foo"))))
+  > EOF
+
+  $ target=".foo.eobjs/foo"
+  $ dune build $target
+  $ cat _build/default/$target
+  foo
+
+  $ cat >>dune <<EOF
+  > (executable
+  >  (name foo))
+  > EOF
+
+  $ cat >foo.ml <<EOF
+  > print_endline "42";;
+  > EOF
+
+  $ dune build ./foo.exe
+  File "dune", line 5, characters 7-10:
+  5 |  (name foo))
+             ^^^
+  Error: No rule found for .foo.eobjs/native/dune__exe__Foo.cmx
+  File "dune", line 5, characters 7-10:
+  5 |  (name foo))
+             ^^^
+  Error: No rule found for .foo.eobjs/native/dune__exe__Foo.o
+  [1]