unikernel/duniverse/dune_/test/blackbox-tests/test-cases/pkg/submodules.t

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+We want to make sure locking works even with submodules. Submodules can
+contains submodules on their own which should also work.
+
+  $ . ../git-helpers.sh
+  $ . ./helpers.sh
+  $ mkrepo
+  $ mkpkg foo <<EOF
+  > EOF
+  $ mkpkg bar <<EOF
+  > depends: [ "foo" ]
+  > EOF
+
+We move `packages` into a different folder
+
+  $ mkdir remote-submodule
+  $ mv mock-opam-repository/packages/* remote-submodule
+  $ rm -r mock-opam-repository/packages
+
+We also move `bar` to a different subrepo:
+
+  $ mv remote-submodule/bar remote-bar
+
+And create a tree of repos with each of them referencing each other. First we
+create a regular repo containing `bar`
+
+  $ cd remote-bar
+  $ git init --quiet
+  $ git add -A
+  $ git commit -m "Initial commit of bar package" --quiet
+  $ SUBMODULE_BAR_LOCATION=$(pwd)
+  $ cd ..
+
+Then we add the `bar` repo as submodule of the `packages` repo:
+
+  $ cd remote-submodule
+  $ git init --quiet
+  $ git add -A
+  $ GIT_ALLOW_PROTOCOL=file git submodule add ${SUBMODULE_BAR_LOCATION} bar
+  Cloning into '$TESTCASE_ROOT/remote-submodule/bar'...
+  done.
+  $ git commit -m "Initial subrepo commit" --quiet
+  $ SUBMODULE_REVISION=$(git rev-parse HEAD)
+  $ SUBMODULE_LOCATION=$(pwd)
+  $ cd ..
+
+In our mock repository, we make sure to add the package submodule as
+`packages` folder:
+
+  $ cd mock-opam-repository
+  $ git init --quiet
+  $ GIT_ALLOW_PROTOCOL=file git submodule add ${SUBMODULE_LOCATION} packages
+  Cloning into '$TESTCASE_ROOT/mock-opam-repository/packages'...
+  done.
+  $ git commit -m "Initial opam-repo commit" --quiet
+  $ git submodule init
+  $ git ls-tree -r HEAD | grep "commit ${SUBMODULE_REVISION}" > /dev/null && echo "Submodule exists at expected revision"
+  Submodule exists at expected revision
+  $ cd ..
+
+We'll use the mock repository as source and depend on `bar`:
+
+  $ add_mock_repo_if_needed "git+file://$(pwd)/mock-opam-repository"
+  $ cat > dune-project <<EOF
+  > (lang dune 3.10)
+  > (package
+  >   (name baz)
+  >   (depends bar))
+  > EOF
+
+We should be able to successfully solve the project with `foo` and `bar`:
+
+  $ dune pkg lock
+  Solution for dune.lock:
+  - bar.0.0.1
+  - foo.0.0.1