Compatibility with cohttp>=6

[vitoyucepi]

Summary

I'm discussing the solver timeout when installing prometheus-app in the ocaml/opam#6137.
The --solver=builtin-0install is a solution for my problem, but using it to install prometheus-app uses cohttp=6 as a dependency, which breaks the liquidsoap build.
Error message:

# File "_none_", line 1:
# Error: Files src/core/.liquidsoap_prometheus.objs/native/builtins_prometheus.cmx
#        and src/core/.liquidsoap_prometheus.objs/native/liq_prometheus.cmx
#        make inconsistent assumptions over interface Http

Details

Container file

FROM ubuntu:24.04

ARG DEBIAN_FRONTEND=noninteractive
ARG OPAM_VERSION=2.2.0
ARG OCAML_VERSION=4.14.2

RUN set -eux; \
      apt-get update; \
      apt-get install --no-install-recommends -y \
        gcc \
        g++ \
        make \
        patch \
        unzip \
        bzip2 \
        wget \
        ca-certificates \
      ;

RUN set -eux; \
      wget -O /usr/local/bin/opam --progress=dot:giga "https://github.com/ocaml/opam/releases/download/$OPAM_VERSION/opam-$OPAM_VERSION-x86_64-linux"; \
      chmod +x /usr/local/bin/opam;

RUN opam init --no-setup --disable-sandboxing --compiler ocaml-base-compiler."$OCAML_VERSION";

RUN set -eux; \
      apt-get update; \
      apt-get install --no-install-recommends --yes \
        libavcodec-dev \
        libavdevice-dev \
        libavfilter-dev \
        libavformat-dev \
        libavutil-dev \
        libswresample-dev \
        libswscale-dev \
        pkg-config \
      ; \
      opam install --assume-depexts --yes \
        ffmpeg \
      ;
RUN set -eux; \
      apt-get update; \
      apt-get install --no-install-recommends --yes \
        libgmp-dev \
      ; \
      opam install --solver=builtin-0install --assume-depexts --yes \
        prometheus-app \
      ;
RUN set -eux; \
      apt-get update; \
      apt-get install --no-install-recommends --yes \
        libcurl4-gnutls-dev \
        libpcre3-dev \
        git \
      ; \
      opam install --assume-depexts --yes \
        prometheus-liquidsoap \
        liquidsoap-lang \
        liquidsoap-libs \
        liquidsoap-libs-extra \
        liquidsoap-core \
        liquidsoap \
      ;

Liquidsoap build error

[ERROR] The compilation of liquidsoap-core.2.2.5 failed at "dune build -p liquidsoap-core -j 5 --promote-install-files=false @install".

#=== ERROR while compiling liquidsoap-core.2.2.5 ==============================#
# context              2.2.0 | linux/x86_64 | ocaml-base-compiler.4.14.2 | https://opam.ocaml.org#fe8dffac61bbab376897c0f4e7cc5b7b8c4eecc1
# path                 ~/.opam/ocaml-base-compiler.4.14.2/.opam-switch/build/liquidsoap-core.2.2.5
# command              ~/.opam/ocaml-base-compiler.4.14.2/bin/dune build -p liquidsoap-core -j 5 --promote-install-files=false @install
# exit-code            1
# env-file             ~/.opam/log/liquidsoap-core-356-a5fa91.env
# output-file          ~/.opam/log/liquidsoap-core-356-a5fa91.out
### output ###
# (cd _build/default && /root/.opam/ocaml-base-compiler.4.14.2/bin/ocamlopt.opt -w -40 -g -w -9 -alert --deprecated -O2 -a -o src/core/liquidsoap_prometheus.cmxa -linkall src/core/.liquidsoap_prometheus.objs/native/liq_prometheus.cmx src/core/.liquidsoap_prometheus.objs/native/builtins_prometheus.cmx)
# File "_none_", line 1:
# Error: Files src/core/.liquidsoap_prometheus.objs/native/builtins_prometheus.cmx
#        and src/core/.liquidsoap_prometheus.objs/native/liq_prometheus.cmx
#        make inconsistent assumptions over interface Http



<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions failed
| - build liquidsoap-core 2.2.5
+- 
+- The following changes have been performed (the rest was aborted)
| - install camlp-streams         5.0.1
| - install camomile              2.0.0
| - install conf-libcurl          2
| - install conf-libpcre          1
| - install cry                   1.0.3
| - install dtools                0.4.5
| - install dune-build-info       3.16.0
| - install dune-private-libs     3.16.0
| - install dune-site             3.16.0
| - install duppy                 0.9.4
| - install dyn                   3.16.0
| - install fileutils             0.6.4
| - install gen                   1.1
| - install liquidsoap-lang       2.2.5
| - install liquidsoap-libs       2.2.5
| - install liquidsoap-libs-extra 2.2.5
| - install menhir                20240715
| - install menhirCST             20240715
| - install menhirLib             20240715
| - install menhirSdk             20240715
| - install metadata              0.3.0
| - install mm                    0.8.5
| - install ocurl                 0.9.2
| - install ordering              3.16.0
| - install pcre                  7.5.0
| - install pp                    1.2.0
| - install ppx_base              v0.16.0
| - install ppx_cold              v0.16.0
| - install ppx_compare           v0.16.0
| - install ppx_enumerate         v0.16.0
| - install ppx_globalize         v0.16.0
| - install ppx_hash              v0.16.0
| - install ppx_string            v0.16.0
| - install prometheus-liquidsoap 2
| - install sedlex                3.2
| - install stdune                3.16.0
+- 
# Run eval $(opam env) to update the current shell environment

The dependencies installed by different solvers for prometheus-app

default

=== install 66 packages
  - install angstrom            0.16.0  [required by uri]
  - install asetmap             0.8.1   [required by prometheus-app]
  - install asn1-combinators    0.2.6   [required by x509]
  - install astring             0.8.5   [required by prometheus-app]
  - install base                v0.16.3 [required by ppx_sexp_conv]
  - install base-bytes          base    [required by cohttp]
  - install base64              3.5.1   [required by cohttp]
  - install bigstringaf         0.10.0  [required by angstrom]
  - install bos                 0.2.1   [required by ca-certs]
  - install ca-certs            0.2.3   [required by conduit-lwt-unix]
  - install cmdliner            1.3.0   [required by prometheus-app]
  - install cohttp              5.3.1   [required by cohttp-lwt]
  - install cohttp-lwt          5.3.0   [required by prometheus-app]
  - install cohttp-lwt-unix     5.3.0   [required by prometheus-app]
  - install conduit             6.2.3   [required by conduit-lwt]
  - install conduit-lwt         6.2.3   [required by cohttp-lwt-unix]
  - install conduit-lwt-unix    6.2.3   [required by cohttp-lwt-unix]
  - install conf-bash           1       [required by base]
  - install conf-gmp            4       [required by zarith, conf-gmp-powm-sec]
  - install conf-gmp-powm-sec   3       [required by mirage-crypto-pk]
  - install cppo                1.6.9   [required by lwt]
  - install cstruct             6.2.0   [required by mirage-crypto, x509]
  - install domain-name         0.4.0   [required by ipaddr, x509]
  - install duration            0.2.1   [required by mirage-crypto-rng]
  - install eqaf                0.9     [required by mirage-crypto]
  - install fmt                 0.9.0   [required by prometheus-app]
  - install fpath               0.7.3   [required by ca-certs]
  - install gmap                0.3.0   [required by x509]
  - install ipaddr              5.6.0   [required by conduit-lwt-unix]
  - install ipaddr-sexp         5.6.0   [required by conduit-lwt-unix]
  - install jsonm               1.0.2   [required by cohttp]
  - install logs                0.7.0   [required by prometheus-app]
  - install lwt                 5.7.0   [required by prometheus-app]
  - install macaddr             5.6.0   [required by ipaddr]
  - install magic-mime          1.3.1   [required by cohttp-lwt-unix]
  - install mirage-crypto       0.11.3  [required by ca-certs]
  - install mirage-crypto-ec    0.11.3  [required by x509]
  - install mirage-crypto-pk    0.11.3  [required by x509]
  - install mirage-crypto-rng   0.11.3  [required by x509]
  - install num                 1.5-1   [required by sexplib]
  - install ocaml-compiler-libs v0.12.4 [required by ppxlib]
  - install ocaml-syntax-shims  1.0.0   [required by angstrom]
  - install ocamlbuild          0.15.0  [required by asetmap, astring]
  - install ocamlfind           1.9.6   [required by asetmap, astring]
  - install ocplib-endian       1.2     [required by lwt]
  - install parsexp             v0.16.0 [required by sexplib]
  - install pbkdf               1.2.0   [required by x509]
  - install ppx_derivers        1.2.1   [required by ppxlib]
  - install ppx_sexp_conv       v0.16.0 [required by cohttp-lwt, cohttp-lwt-unix]
  - install ppxlib              0.33.0  [required by ppx_sexp_conv]
  - install prometheus          1.2     [required by prometheus-app]
  - install prometheus-app      1.2
  - install ptime               1.1.0   [required by ca-certs]
  - install re                  1.11.0  [required by prometheus-app]
  - install rresult             0.7.0   [required by bos]
  - install seq                 base    [required by re]
  - install sexplib             v0.16.0 [required by conduit-lwt]
  - install sexplib0            v0.16.0 [required by cohttp-lwt]
  - install stdlib-shims        0.3.0   [required by ppxlib]
  - install stringext           1.6.0   [required by cohttp]
  - install topkg               1.0.7   [required by asetmap, astring]
  - install uri                 4.4.0   [required by cohttp-lwt]
  - install uri-sexp            4.4.0   [required by cohttp]
  - install uutf                1.0.3   [required by jsonm]
  - install x509                0.16.5  [required by ca-certs]
  - install zarith              1.14    [required by asn1-combinators, mirage-crypto-pk]

builtin-0install

=== install 65 packages
  - install angstrom            0.16.0      [required by uri]
  - install asetmap             0.8.1       [required by prometheus-app]
  - install asn1-combinators    0.2.6       [required by x509]
  - install astring             0.8.5       [required by prometheus-app]
  - install base                v0.16.3     [required by ppx_sexp_conv]
  - install base-bytes          base        [required by ocplib-endian]
  - install base64              3.5.1       [required by cohttp]
  - install bigstringaf         0.10.0      [required by angstrom]
  - install bos                 0.2.1       [required by ca-certs]
  - install ca-certs            0.2.3       [required by conduit-lwt-unix]
  - install cmdliner            1.3.0       [required by prometheus-app]
  - install cohttp              6.0.0~beta2 [required by cohttp-lwt, cohttp-lwt-unix]
  - install cohttp-lwt          6.0.0~beta2 [required by prometheus-app]
  - install cohttp-lwt-unix     6.0.0~beta2 [required by prometheus-app]
  - install conduit             6.2.3       [required by conduit-lwt]
  - install conduit-lwt         6.2.3       [required by cohttp-lwt-unix]
  - install conduit-lwt-unix    6.2.3       [required by cohttp-lwt-unix]
  - install conf-bash           1           [required by base]
  - install conf-gmp            4           [required by zarith, conf-gmp-powm-sec]
  - install conf-gmp-powm-sec   3           [required by mirage-crypto-pk]
  - install cppo                1.6.9       [required by lwt]
  - install cstruct             6.2.0       [required by mirage-crypto, x509]
  - install domain-name         0.4.0       [required by ipaddr, x509]
  - install duration            0.2.1       [required by mirage-crypto-rng]
  - install eqaf                0.9         [required by mirage-crypto]
  - install fmt                 0.9.0       [required by prometheus-app]
  - install fpath               0.7.3       [required by ca-certs]
  - install gmap                0.3.0       [required by x509]
  - install http                6.0.0~beta2 [required by cohttp-lwt, cohttp-lwt-unix]
  - install ipaddr              5.6.0       [required by conduit-lwt-unix]
  - install ipaddr-sexp         5.6.0       [required by conduit-lwt-unix]
  - install logs                0.7.0       [required by prometheus-app]
  - install lwt                 5.7.0       [required by prometheus-app]
  - install macaddr             5.6.0       [required by ipaddr]
  - install magic-mime          1.3.1       [required by cohttp-lwt-unix]
  - install mirage-crypto       0.11.3      [required by ca-certs]
  - install mirage-crypto-ec    0.11.3      [required by x509]
  - install mirage-crypto-pk    0.11.3      [required by x509]
  - install mirage-crypto-rng   0.11.3      [required by x509]
  - install num                 1.5-1       [required by sexplib]
  - install ocaml-compiler-libs v0.12.4     [required by ppxlib]
  - install ocaml-syntax-shims  1.0.0       [required by angstrom]
  - install ocamlbuild          0.15.0      [required by asetmap, astring]
  - install ocamlfind           1.9.6       [required by asetmap, astring]
  - install ocplib-endian       1.2         [required by lwt]
  - install parsexp             v0.16.0     [required by sexplib]
  - install pbkdf               1.2.0       [required by x509]
  - install ppx_derivers        1.2.1       [required by ppxlib]
  - install ppx_sexp_conv       v0.16.0     [required by cohttp-lwt, cohttp-lwt-unix]
  - install ppxlib              0.33.0      [required by ppx_sexp_conv]
  - install prometheus          1.2         [required by prometheus-app]
  - install prometheus-app      1.2
  - install ptime               1.1.0       [required by ca-certs]
  - install re                  1.11.0      [required by prometheus-app]
  - install rresult             0.7.0       [required by bos]
  - install seq                 base        [required by re]
  - install sexplib             v0.16.0     [required by conduit-lwt]
  - install sexplib0            v0.16.0     [required by cohttp-lwt]
  - install stdlib-shims        0.3.0       [required by ppxlib]
  - install stringext           1.6.0       [required by cohttp]
  - install topkg               1.0.7       [required by asetmap, astring]
  - install uri                 4.4.0       [required by cohttp-lwt]
  - install uri-sexp            4.4.0       [required by cohttp]
  - install x509                0.16.5      [required by ca-certs]
  - install zarith              1.14        [required by asn1-combinators, mirage-crypto-pk]

[toots]

Thanks! This is a module name change conflict. I have renamed the file in #4081 this should fix the issue.

[vitoyucepi]

Hi @toots,
Will you update the packages in the opam repository and mark their incompatibility with cohttp>=6?