unikernel/duniverse/dune_/test/blackbox-tests/test-cases/github2681.t

@@ -0,0 +1,28 @@
+A rule may have an alias field. This denotes that the action of the rule is a
+dependency of the alias.
+  $ mkdir simple && cd simple
+  $ cat > dune-project <<EOF
+  > (lang dune 2.0)
+  > EOF
+  $ cat > dune <<EOF
+  > (rule
+  >  (action (with-stdout-to foo (echo "hello world")))
+  >  (alias bar))
+  > EOF
+  $ dune build @bar
+  $ cat _build/default/foo
+  hello world
+  $ (cd ..)
+
+A rule may now have an empty set of targets if it has an alias field
+  $ mkdir no-targets && cd no-targets
+  $ cat > dune-project <<EOF
+  > (lang dune 2.0)
+  > EOF
+  $ cat > dune <<EOF
+  > (rule
+  >  (action (echo "hello world"))
+  >  (alias bar))
+  > EOF
+  $ dune build @bar
+  hello world