test: demonstrate bug depending on package that installs directories

test/blackbox-tests/test-cases/directory-targets/installed-dependency.t

@@ -0,0 +1,53 @@
+Allow directories to be installable
+
+  $ mkdir a b prefix
+  $ cat >a/dune-project <<EOF
+  > (lang dune 3.5)
+  > (package (name foo))
+  > (using directory-targets 0.1)
+  > EOF
+  $ cat >a/dune <<EOF
+  > (install
+  >  (dirs rules/bar)
+  >  (section share))
+  > EOF
+  $ mkdir a/rules
+  $ cat >a/rules/dune <<EOF
+  > (rule
+  >  (target (dir bar))
+  >  (deps (sandbox always))
+  >  (action (bash "mkdir -p %{target}/baz && touch %{target}/{x,y,z} && touch %{target}/baz/{a,b}")))
+  > EOF
+  $ dune build --root=a foo.install
+  Entering directory 'a'
+  Leaving directory 'a'
+
+  $ cat a/_build/install/default/lib/foo/dune-package
+  (lang dune 3.8)
+  (name foo)
+  (sections (lib .) (share ../../share/foo))
+  (files (lib (META dune-package)) (share (bar)))
+  $ dune install --root a --prefix $PWD/prefix --display short
+  Installing $TESTCASE_ROOT/prefix/lib/foo/META
+  Installing $TESTCASE_ROOT/prefix/lib/foo/dune-package
+  Installing $TESTCASE_ROOT/prefix/share/foo/bar/baz/a
+  Installing $TESTCASE_ROOT/prefix/share/foo/bar/baz/b
+  Installing $TESTCASE_ROOT/prefix/share/foo/bar/x
+  Installing $TESTCASE_ROOT/prefix/share/foo/bar/y
+  Installing $TESTCASE_ROOT/prefix/share/foo/bar/z
+
+  $ cat > b/dune-project <<EOF
+  > (lang dune 3.5)
+  > EOF
+  $ cat > b/dune <<EOF
+  > (alias (name foo) (deps (package foo)))
+  > EOF
+
+  $ OCAMLPATH=$PWD/prefix/lib/:$OCAMLPATH dune build --root=b @foo --display=short
+  Entering directory 'b'
+  Error: File unavailable:
+  $TESTCASE_ROOT/prefix/share/foo/bar
+  This is not a regular file (S_DIR)
+  -> required by alias foo in dune:1
+  Leaving directory 'b'
+  [1]