unikernel/duniverse/dune_/test/blackbox-tests/test-cases/dune-cache/symlink.t

@@ -0,0 +1,39 @@
+Check that: (i) we refuse to cache symbolic links, and (ii) rules that use the
+produced symbolic links work correctly and are appropriately cached.
+
+  $ export DUNE_CACHE=enabled
+  $ export DUNE_CACHE_ROOT=$PWD/.cache
+
+  $ cat > dune-project <<EOF
+  > (lang dune 2.1)
+  > EOF
+  $ cat > dune <<EOF
+  > (rule
+  >   (deps source)
+  >   (targets link)
+  >   (action (bash "ln -s source link")))
+  > (rule
+  >   (deps link)
+  >   (targets target)
+  >   (action (bash "cat link link > target")))
+  > EOF
+  $ cat > source <<EOF
+  > \_o< COIN
+  > EOF
+  $ dune build target
+
+Dune cache contains entries for [source] and [target] but not for [link]
+
+  $ (cd "$DUNE_CACHE_ROOT/meta/v5"; grep -rs . -e 'source' | dune_cmd count-lines)
+  1
+  $ (cd "$DUNE_CACHE_ROOT/meta/v5"; grep -rs . -e 'target' | dune_cmd count-lines)
+  1
+  $ (cd "$DUNE_CACHE_ROOT/meta/v5"; grep -rs . -e 'link' | dune_cmd count-lines)
+  0
+
+The files in the build directory are shared with the cache entries
+
+  $ dune_cmd stat hardlinks _build/default/source
+  2
+  $ dune_cmd stat hardlinks _build/default/target
+  2