Failure "Windows only. This function isn't implemented."

[mlasson]

Hello !

I used to be able to use duniverse to build ocaml-lsp on windows without opam nor ocamlfind, and it worked like a charm !

But since the upgrade to "opam core 2.1" (commit f133ee6)
the executable is throwing an uncaught failure exception:

opam-monorepo: internal error, uncaught exception:
               (Failure "Windows only. This function isn't implemented.")
               Raised at file "stdlib.ml", line 29, characters 17-33
               Called from file "duniverse/opam-core.2.1.0-beta/src/core/opamStubs.ml.dummy" (inlined), line 13, characters 23-80
               Called from file "duniverse/opam-core.2.1.0-beta/src/core/opamStd.ml", line 800, characters 36-66
               Called from file "duniverse/opam-core.2.1.0-beta/src/core/opamStd.ml" (inlined), line 1268, characters 44-71
               Called from file "duniverse/opam-core.2.1.0-beta/src/core/opamConsole.ml", line 585, characters 41-76
               Called from file "duniverse/opam-core.2.1.0-beta/src/state/opamFormatUpgrade.ml", line 1128, characters 4-401
               Called from file "duniverse/opam-core.2.1.0-beta/src/state/opamGlobalState.ml", line 62, characters 15-43
               Called from file "duniverse/opam-core.2.1.0-beta/src/state/opamGlobalState.ml", line 169, characters 11-20
               Called from file "cli/lock.ml", line 109, characters 2-57
               Called from file "duniverse/cmdliner.1.0.4+dune/src/cmdliner_term.ml", line 25, characters 19-24
               Called from file "duniverse/cmdliner.1.0.4+dune/src/cmdliner.ml", line 33, characters 27-34
               Called from file "duniverse/cmdliner.1.0.4+dune/src/cmdliner.ml", line 117, characters 32-39

I guess there must be a "configure step" required to be able to compile opam-core on windows to avoid the selection of the dummy implementation of these stubs.

What am I missing ?

[NathanReb]

Thanks for reporting this!

That's unfortunate indeed, I'll investigate and report to opam maintainers, we might need a proper dune port in the meantime!

[emillon]

This is tracked on the opam side as ocaml/opam#4726

[dra27]

Tentative fix in ocaml/opam#4777

[tmattio]

@dra27 is the above PR still relevant?

[dra27]

Yes (🙂)