unikernel/duniverse/dune_/test/blackbox-tests/test-cases/dynamic-dependencies.t

@@ -0,0 +1,116 @@
+Tests for dynamic dependencies computed from the `%{read:...}` family of macros
+
+  $ cat > dune-project <<EOF
+  > (lang dune 3.1)
+  > EOF
+
+Define 2 rules and a file containing their paths
+
+  $ cat > deps.d <<EOF
+  > (depA depB)
+  > EOF
+
+  $ cat > dune <<EOF
+  > (rule
+  >  (target depA)
+  >  (action
+  >   (system "echo depA > %{target}")))
+  > 
+  > (rule
+  >  (target depB)
+  >  (action
+  >   (system "echo depB > %{target}")))
+  > EOF
+
+Now we define a rule that reads `deps.d` to figure out what to build.
+
+  $ cat >> dune <<EOF
+  > (rule
+  >  (target output)
+  >  (deps (include deps.d))
+  >  (action
+  >   (system "echo %{deps} > %{target}")))
+  > EOF
+
+Building `./output` should now produce a file with contents "depA depB"
+
+  $ dune build ./output --display=short
+            sh depA
+            sh depB
+            sh output
+
+Doesn't work in dune pre 3.0
+
+  $ cat > dune-project <<EOF
+  > (lang dune 3.0)
+  > EOF
+
+  $ dune build ./output --display=short
+  File "dune", line 12, characters 7-23:
+  12 |  (deps (include deps.d))
+              ^^^^^^^^^^^^^^^^
+  Error: 'include' is only available since version 3.1 of the dune language.
+  Please update your dune-project file to have (lang dune 3.1).
+  [1]
+
+Works with aliases and other dependency specifications
+
+  $ cat > dune-project <<EOF
+  > (lang dune 3.1)
+  > EOF
+
+  $ cat > deps.d <<EOF
+  > ((alias depA) (universe) depB another_dep)
+  > EOF
+
+  $ cat > dune <<EOF
+  > (rule
+  >  (alias depA)
+  >  (action
+  >   (system "echo building depA")))
+  > 
+  > (rule
+  >  (target depB)
+  >  (action
+  >   (progn
+  >     (run echo building depB)
+  >     (system "echo depB > %{target}"))))
+  > (rule
+  >  (target another_dep)
+  >  (action
+  >   (system "echo building a_dep > %{target}")))
+  > 
+  > (rule
+  >  (alias output)
+  >  (deps (include deps.d))
+  >  (action
+  >   (no-infer (echo "dependencies %{deps}"))))
+  > EOF
+
+  $ dune build @output --display=short
+            sh alias depA
+  building depA
+          echo depB
+  building depB
+            sh another_dep
+            sh depB
+  dependencies depB another_dep
+
+Multiple `(include)` nesting
+
+  $ cat >> dune <<EOF
+  > (rule
+  >  (target meta-deps.d)
+  >  (action
+  >   (system "echo '((include ./deps.d))' > %{target}")))
+  > 
+  > (rule
+  >  (alias nested)
+  >  (deps (include meta-deps.d))
+  >  (action (no-infer (echo "metadeps: %{deps}"))))
+  > EOF
+
+  $ dune build @nested --display=short
+            sh meta-deps.d
+  metadeps: depB another_dep
+