unikernel/duniverse/dune_/test/blackbox-tests/test-cases/version-pform/empty-version.t

@@ -0,0 +1,16 @@
+When the version is absent, we print the empty string
+
+  $ cat >dune-project <<EOF
+  > (lang dune 3.13)
+  > (package (name foo))
+  > EOF
+
+  $ cat >dune <<EOF
+  > (rule
+  >  (alias foo)
+  >  (action (echo foo is '%{version:foo}')))
+  > EOF
+
+  $ dune build @foo
+  foo is ''
+

unikernel/duniverse/dune_/test/blackbox-tests/test-cases/version-pform/external-package.t

@@ -0,0 +1,72 @@
+Using a package that is installed needs 2.9 and above
+
+  $ cat >dune <<EOF
+  > (rule
+  >  (alias foo)
+  >  (deps (universe))
+  >  (action (echo foo is '%{version:foo}')))
+  > EOF
+
+  $ runtest() {
+  > cat >dune-project <<EOF
+  > (lang dune $1)
+  > EOF
+  > dune build @foo
+  > }
+
+  $ runtest 2.8
+  File "dune", line 4, characters 23-37:
+  4 |  (action (echo foo is '%{version:foo}')))
+                             ^^^^^^^^^^^^^^
+  Error: Package "foo" doesn't exist in the current project.
+  Hint: If you want to refer to an installed package, or more generally to a
+  package from another project, you need at least (lang dune 2.9).
+  [1]
+  $ runtest 2.9
+  File "dune", line 4, characters 23-37:
+  4 |  (action (echo foo is '%{version:foo}')))
+                             ^^^^^^^^^^^^^^
+  Error: Package "foo" doesn't exist in the current project and isn't installed
+  either.
+  [1]
+
+Now we install foo without a library
+  $ dir=_without_lib
+  $ mkdir $dir && cd $dir
+  $ cat >dune-project <<EOF
+  > (lang dune 3.13)
+  > (package (name foo))
+  > EOF
+  $ cat >dune <<EOF
+  > (rule (with-stdout-to foo (echo "")))
+  > (install (section share) (files foo))
+  > EOF
+  $ dune build @install
+  $ dune install --prefix ./_install
+  $ cd ..
+
+  $ OCAMLPATH="$PWD/$dir/_install/lib:$OCAMLPATH" runtest 2.9
+  File "dune", line 4, characters 23-37:
+  4 |  (action (echo foo is '%{version:foo}')))
+                             ^^^^^^^^^^^^^^
+  Error: Package "foo" doesn't exist in the current project and isn't installed
+  either.
+  [1]
+
+Now we install foo with a library
+  $ dir=with_lib
+  $ mkdir $dir && cd $dir
+  $ cat >dune-project <<EOF
+  > (lang dune 3.13)
+  > (package (name foo))
+  > EOF
+  $ cat >dune <<EOF
+  > (library (public_name foo))
+  > EOF
+  $ touch foo.ml
+  $ dune build @install
+  $ dune install --prefix ./_install
+  $ cd ..
+
+  $ OCAMLPATH="$PWD/$dir/_install/lib:$OCAMLPATH" runtest 2.9
+  foo is ''

unikernel/duniverse/dune_/test/blackbox-tests/test-cases/version-pform/package-filter.t

@@ -0,0 +1,43 @@
+Here we are referring to a package that is external with -p, but we are still
+allowed to access it:
+
+  $ make_project() {
+  > cat >dune-project <<EOF
+  > (lang dune 3.13)
+  > (package (name a))
+  > (package (name b))
+  > (version $1)
+  > EOF
+  > }
+
+  $ make_project 1.0.0
+
+  $ mkdir a b
+  $ cat >a/dune <<EOF
+  > (library (public_name a))
+  > EOF
+  $ cat >b/dune <<EOF
+  > (library (public_name b))
+  > EOF
+
+  $ cat >dune <<EOF
+  > (rule
+  >  (alias foo)
+  >  (deps (universe))
+  >  (action (echo version a is '%{version:a}')))
+  > EOF
+
+  $ dune build @foo -p b
+  version a is '1.0.0'
+
+Not only that the above is inconsistent with how we handle external packages,
+it will also give the wrong answer if a was installed.
+
+  $ dune build @install -p a
+  $ dune install a --prefix _install
+
+The answer should be 1.0.0, bceause that's the version we installed
+
+  $ make_project 2.0.0
+  $ OCAMLPATH="$PWD/_install/lib:$OCAMLPATH" dune build @foo -p b
+  version a is '2.0.0'

unikernel/duniverse/dune_/test/blackbox-tests/test-cases/version-pform/same-project.t

@@ -0,0 +1,20 @@
+Print a version while we're in the same project
+
+  $ cat >dune-project <<EOF
+  > (lang dune 3.13)
+  > (package
+  >  (name foo))
+  > (package
+  >  (name bar))
+  > (version 1.0.0)
+  > EOF
+
+  $ cat >dune <<EOF
+  > (rule
+  >  (alias foo)
+  >  (action (echo foo is '%{version:foo}' bar is '%{version:bar}')))
+  > EOF
+
+  $ dune build @foo
+  foo is '1.0.0' bar is '1.0.0'
+