unikernel/duniverse/dune_/test/blackbox-tests/test-cases/github5264.t

@@ -0,0 +1,51 @@
+Reproduction case for #5264
+
+Before Dune 3.0, it was possible to abuse the
+%{lib:<libname>:<filename>} syntax to refer to the library directory
+by writing %{lib:<libname:} or %{lib:<libname>:.}. Several projects
+used that in their ctypes rules. Dune 3.0 initially broke this, which
+caused many build failures. This test makes sure we still support this
+syntax in lang Dune < 3.0.
+
+  $ cat > dune <<'EOF'
+  > (library (name ctypes))
+  > (library (name other))
+  > (rule
+  >  (alias a)
+  >  (action (run echo %{lib-private:ctypes:})))
+  > (rule
+  >  (alias b)
+  >  (action (run echo %{lib-private:other:.})))
+  > EOF
+
+We still support it with older version of the language, for backward
+compatibility purposes:
+
+  $ echo '(lang dune 2.9)' > dune-project
+  $ dune build @a
+  .
+  $ dune build @b
+  .
+
+But we are more strict since 3.0:
+
+  $ echo '(lang dune 3.0)' > dune-project
+  $ dune build @a
+  File "dune", line 5, characters 19-41:
+  5 |  (action (run echo %{lib-private:ctypes:})))
+                         ^^^^^^^^^^^^^^^^^^^^^^
+  Error: The form %{lib-private:<libname>:} is no longer supported since
+  version 3.0 of the Dune language.
+  Hint: Did you know that Dune 3.0 supports ctypes natively? See the manual for
+  more details.
+  [1]
+  $ dune build @b
+  File "dune", line 8, characters 19-41:
+  8 |  (action (run echo %{lib-private:other:.})))
+                         ^^^^^^^^^^^^^^^^^^^^^^
+  Error: The form %{lib-private:<libname>:.} is no longer supported since
+  version 3.0 of the Dune language.
+  Hint: If you are trying to use this form to include a directory, you should
+  instead use (foreign_stubs (include_dirs (lib other))). See the manual for
+  more details.
+  [1]