42 lines
975 B
Perl
42 lines
975 B
Perl
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Demonstrate a dependency cycle between library modules field and a rule that
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generates them dynamically in the same directory
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$ cat > dune-project << EOF
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> (lang dune 3.13)
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> EOF
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$ mkdir gen
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$ cat > gen/dune << EOF
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> (executable
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> (name gen)
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> (libraries y))
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> (rule
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> (with-stdout-to dyn_modules (run ./gen.exe)))
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> EOF
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$ cat > gen/gen.ml <<EOF
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> let () =
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> Format.eprintf "generating. %s from 'y'" Y.x;
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> Format.printf "foo"
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> EOF
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$ touch foo.ml
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$ cat > dune << EOF
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> (library
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> (name x)
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> (modules %{read:gen/dyn_modules}))
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> (library
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> (name y)
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> (modules y))
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> EOF
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$ cat > y.ml <<EOF
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> let x = "hello"
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> EOF
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$ dune build ./gen/dyn_modules
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Error: Dependency cycle between:
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_build/default/gen/dyn_modules
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-> %{read:gen/dyn_modules} at dune:3
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-> (modules) field at dune:1
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-> _build/default/gen/.merlin-conf/exe-gen
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-> _build/default/gen/gen.exe
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-> _build/default/gen/dyn_modules
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[1]
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