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

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+Exercise the various ways of resolving executable names with `dune exec`.
+
+  $ cat > dune-project << EOF
+  > (lang dune 3.20)
+  > 
+  > (package
+  >  (name foo))
+  > EOF
+
+  $ cat > dune << EOF
+  > (executable
+  >  (public_name foo))
+  > EOF
+
+  $ cat > foo.ml << EOF
+  > let () = print_endline "hello foo"
+  > EOF
+
+An executable that would be installed by the current package:
+  $ dune describe location foo
+  _build/install/default/bin/foo
+
+An executable from the current project:
+  $ dune describe location ./foo.exe
+  _build/default/foo.exe
+
+Test that executables from dependencies are located correctly:
+  $ mkdir dune.lock
+  $ cat > dune.lock/lock.dune << EOF
+  > (lang package 0.1)
+  > EOF
+  $ cat > dune.lock/bar.pkg << EOF
+  > (version 0.1)
+  > (install
+  >  (progn
+  >   (write-file %{bin}/bar "#!/bin/sh\necho hello bar")
+  >   (run chmod a+x %{bin}/bar)))
+  > EOF
+
+  $ cat > dune-project << EOF
+  > (lang dune 3.20)
+  > 
+  > (package
+  >  (name foo)
+  >  (depends bar))
+  > EOF
+
+  $ dune describe location bar
+  _build/_private/default/.pkg/bar/target/bin/bar
+
+Test that executables from PATH are located correctly:
+  $ mkdir bin
+  $ cat > bin/baz << EOF
+  > #!/bin/sh
+  > echo hello baz
+  > EOF
+
+  $ chmod a+x bin/baz
+  $ export PATH=$PWD/bin:$PATH
+
+  $ dune describe location baz
+  $TESTCASE_ROOT/bin/baz
+
+  $ dune exec echo '%{bin:foo}'
+  _build/install/default/bin/foo