112 lines
3.2 KiB
Perl
112 lines
3.2 KiB
Perl
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Dune prevents overlapping dependencies. These are local dependencies whose names
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collide with dependencies already installed. This was introduced in
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https://github.com/ocaml/dune/pull/587
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First we prepare two external libraries where some_package1 depends on some_package2
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$ mkdir external
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$ cd external
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$ cat >dune-project <<EOF
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> (lang dune 2.8)
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> (package (name some_package1))
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> (package (name some_package2))
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> EOF
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$ cat >dune <<EOF
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> (library
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> (name lib1)
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> (modules ())
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> (libraries some_package2)
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> (public_name some_package1))
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> (library
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> (name lib2)
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> (modules ())
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> (public_name some_package2))
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> EOF
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$ dune build @install
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$ cd ..
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Then we create a workspace with some_package2
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$ mkdir use
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$ cd use
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$ mkdir proj1
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$ cd proj1
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$ cat >dune-project <<EOF
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> (lang dune 2.8)
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> (package (name some_package2))
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> EOF
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$ cat >dune <<EOF
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> (library
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> (name lib1)
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> (modules ())
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> (public_name some_package2))
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> EOF
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$ cd ..
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Then we try to build a library that uses some_package1 which in turn
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depends on the overlapping some_package2:
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$ mkdir proj2
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$ cd proj2
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$ cat >dune-project <<EOF
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> (lang dune 2.8)
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> EOF
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$ cat >dune <<EOF
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> (library
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> (name bar)
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> (libraries some_package1))
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> EOF
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$ touch bar.ml
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$ cd ..
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And we see the error:
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$ OCAMLPATH=$PWD/../external/_build/install/default/lib dune build %{cma:proj2/bar} --root .
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Error: Conflict between the following libraries:
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- "some_package2" in _build/default/proj1
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- "some_package2" in
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$TESTCASE_ROOT/use/../external/_build/install/default/lib/some_package2
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-> required by library "some_package1" in
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$TESTCASE_ROOT/use/../external/_build/install/default/lib/some_package1
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-> required by _build/default/proj2/.bar.objs/byte/bar.cmo
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-> required by _build/default/proj2/bar.cma
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-> required by %{cma:proj2/bar} at command line:1
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[1]
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We can fix the error by allow overlapping dependencies:
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$ cat >proj2/dune <<EOF
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> (library
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> (name bar)
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> (allow_overlapping_dependencies)
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> (libraries some_package1))
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> EOF
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$ OCAMLPATH=$PWD/../external/_build/install/default/lib dune build %{cma:proj2/bar} --root .
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Strangely, the error disappears if we remove the source for the bar lib:
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$ cat >proj2/dune <<EOF
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> (library
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> (name bar)
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> (libraries some_package1))
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> EOF
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$ rm proj2/bar.ml
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$ OCAMLPATH=$PWD/../external/_build/install/default/lib dune build %{cma:proj2/bar} --root .
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We also make sure the error exists for executables:
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$ cat >proj2/dune <<EOF
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> (executable
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> (name bar)
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> (libraries some_package1))
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> EOF
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$ touch proj2/bar.ml
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$ OCAMLPATH=$PWD/../external/_build/install/default/lib dune build ./proj2/bar.exe --root .
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Error: Conflict between the following libraries:
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- "some_package2" in _build/default/proj1
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- "some_package2" in
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$TESTCASE_ROOT/use/../external/_build/install/default/lib/some_package2
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-> required by library "some_package1" in
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$TESTCASE_ROOT/use/../external/_build/install/default/lib/some_package1
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-> required by executable bar in proj2/dune:2
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-> required by _build/default/proj2/.bar.eobjs/native/dune__exe__Bar.cmx
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-> required by _build/default/proj2/bar.exe
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[1]
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