Upgrading from Liquidsoap 2.0.3-1 to 2.1.4 (latest) with Opam

[SkillenUK]

Hi, hopefully someone can advise me. I currently have Liquidsoap 2.0.3-1, confirmed by typing opam list. If I run opam update then opam upgrade I get the following message...

Everything as up-to-date as possible (run with --verbose to show unavailable upgrades).

The following packages are not being upgraded because the new versions conflict with other installed packages:
  - camomile.2.0.0
    -- liquidsoap.2.1.4 is installed and requires camomile (>= 1.0.0 & < 2.0.0)
  - liquidsoap.2.1.4
  - menhir.20220210
  - menhirLib.20220210
  - menhirSdk.20220210
  - mm.0.8.3
  - pcre.7.5.0
  - sedlex.3.1
However, you may "opam upgrade" these packages explicitly, which will ask permission to downgrade or uninstall the conflicting packages.
Nothing to do.

If I run opam upgrade liquidsoap or opam upgrade liquidsoap.2.1.4 or opam install liquidsoap.2.1.4 then I get the following message...

Sorry, no solution found: there seems to be a problem with your request.

I've tried removing it and installing it again and I still get version 2.0.3-1. Could someone please advise me on how I can upgrade to the latest version? I have had a few issues with 2.0.3-1 so I'm keen to try 2.1.4. I'm guessing it's something else installed that's holding it back.

My output from opam list is as follows (in case it helps)...

# Packages matching: installed
# Name              # Installed # Synopsis
base-bigarray       base
base-bytes          base        Bytes library distributed with the OCaml compiler
base-threads        base
base-unix           base
camomile            1.0.2       A Unicode library
conf-lame           1           Virtual package relying on lame
conf-libcurl        2           Virtual package relying on a libcurl system installation
conf-libogg         1           Virtual package relying on libogg
conf-libpcre        1           Virtual package relying on a libpcre system installation
conf-libssl         4           Virtual package relying on an OpenSSL library system installation
conf-libvorbis      1           Virtual package relying on libvorbis
conf-mad            1           Virtual package relying on mad
conf-pkg-config     2           Check if pkg-config is installed and create an opam switch local pkgconfig folder
conf-samplerate     1           Virtual package relying on samplerate
conf-taglib         1           Virtual package relying on taglib
conf-which          1           Virtual package relying on which
cry                 0.6.7       OCaml client for the various icecast & shoutcast source protocols
csexp               1.5.1       Parsing and printing of S-expressions in Canonical form
dtools              0.4.4       Library providing various helper functions to make daemons
dune                3.7.0       Fast, portable, and opinionated build system
dune-configurator   3.7.0       Helper library for gathering system configuration
duppy               0.9.2       Library providing monadic threads
gen                 1.1         Iterators for OCaml, both restartable and consumable
lame                0.3.6       MP3 encoding library
liquidsoap          2.0.3-1     Swiss-army knife for multimedia streaming
mad                 0.5.2       Mad decoding library
menhir              20211128    An LR(1) parser generator
menhirLib           20211128    Runtime support library for parsers generated by Menhir
menhirSdk           20211128    Compile-time library for auxiliary tools related to Menhir
mm                  0.7.4       The mm library contains high-level to create and manipulate multimedia streams (audio, video, MIDI)
ocaml               4.08.1      The OCaml compiler (virtual package)
ocaml-compiler-libs v0.12.4     OCaml compiler libraries repackaged
ocaml-config        1           OCaml Switch Configuration
ocaml-system        4.08.1      The OCaml compiler (system version, from outside of opam)
ocamlbuild          0.14.2      OCamlbuild is a build system with builtin rules to easily build most OCaml projects
ocamlfind           1.9.6       A library manager for OCaml
ocurl               0.9.2       Bindings to libcurl
ogg                 0.7.3       Bindings to libogg
opam-depext         1.2.1-1     Install OS distribution packages
pcre                7.4.6       Bindings to the Perl Compatibility Regular Expressions library
ppx_derivers        1.2.1       Shared [@@deriving] plugin registry
ppxlib              0.29.1      Standard library for ppx rewriters
samplerate          0.1.6       Samplerate audio conversion library
sedlex              3.0         An OCaml lexer generator for Unicode
seq                 base        Compatibility package for OCaml's standard iterator type starting from 4.07.
sexplib0            v0.15.1     Library containing the definition of S-expressions and some base converters
ssl                 0.5.13      Bindings for OpenSSL
stdlib-shims        0.3.0       Backport some of the new stdlib features to older compiler
taglib              0.3.10      Bindings for the taglib library
uchar               0.0.2       Compatibility library for OCaml's Uchar module
vorbis              0.8.0       Bindings to libvorbis

Thanks in advance, Skillen :)

[toots]

Hi,

I believe the conflict is because you cannot upgrade both camomile and liquidsoap. I would simply ask opam to install the latest liquidsoap and let it figure out the required upgrades:

% opam install liquidsoap.2.1.4

[SkillenUK]

Thanks for the reply, I have tried opam install liquidsoap.2.1.4 and I get...

Sorry, no solution found: there seems to be a problem with your request.

No solution found, exiting

Maybe I need to remove camomile first?

[toots]

Ha yes sorry didn't see that. Yes you can probably try to remove camomile and see what happens.

[SkillenUK]

I've jut tried that but it's basically lead me back to 2.0.3-1.

user@server:~$ opam remove camomile
The following actions will be performed:
  - remove liquidsoap 2.0.3-1 [uses camomile]
  - remove camomile   1.0.2
===== 2 to remove =====
Do you want to continue? [Y/n] y

<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[liquidsoap.2.0.3-1] found in cache

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> removed   liquidsoap.2.0.3-1
-> removed   camomile.1.0.2
Done.
# Run eval $(opam env) to update the current shell environment

user@server:~$ opam install liquidsoap.2.1.4
Sorry, no solution found: there seems to be a problem with your request.

No solution found, exiting

user@server:~$ opam install liquidsoap
The following actions will be performed:
  - install camomile   1.0.2   [required by liquidsoap]
  - install liquidsoap 2.0.3-1
===== 2 to install =====
Do you want to continue? [Y/n]

Might I need to update other packages on my system first?

[SkillenUK]

I've also tried running opam upgrade after removing camomile and liquidsoap and it upgraded some packages. But it then wanted to downgrade them again to install liquidsoap.

user@server:~$ opam upgrade
The following actions will be performed:
  - upgrade menhirSdk 20211128 to 20220210
  - upgrade mm        0.7.4 to 0.8.3
  - upgrade menhirLib 20211128 to 20220210
  - upgrade menhir    20211128 to 20220210
===== 4 to upgrade =====
Do you want to continue? [Y/n] y

<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[menhir.20220210] downloaded from cache at https://opam.ocaml.org/cache
[mm.0.8.3] downloaded from cache at https://opam.ocaml.org/cache
[menhirLib.20220210] downloaded from cache at https://opam.ocaml.org/cache
[menhirSdk.20220210] downloaded from cache at https://opam.ocaml.org/cache

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> removed   menhir.20211128
-> removed   menhirLib.20211128
-> removed   menhirSdk.20211128
-> removed   mm.0.7.4
-> installed menhirLib.20220210
-> installed menhirSdk.20220210
-> installed menhir.20220210
-> installed mm.0.8.3
Done.
# Run eval $(opam env) to update the current shell environment

user@server:~$ opam install liquidsoap.2.1.4
Sorry, no solution found: there seems to be a problem with your request.

No solution found, exiting

user@server:~$ opam install liquidsoap
The following actions will be performed:
  - downgrade menhirSdk  20220210 to 20211128 [required by menhir]
  - install   camomile   1.0.2                [required by liquidsoap]
  - downgrade menhirLib  20220210 to 20211128 [required by menhir]
  - downgrade mm         0.8.3 to 0.7.4       [required by liquidsoap]
  - downgrade menhir     20220210 to 20211128 [required by liquidsoap]
  - install   liquidsoap 2.0.3-1
===== 2 to install | 4 to downgrade =====
Do you want to continue? [Y/n]

I'm not sure what else I can try.

[toots]

What's your opam version?

[SkillenUK]

I have opam is 2.0.5-1 installed from the Ubuntu 20.04 package manager (apt-get).

I have been playing around a bit more and I'm wondering if ocaml is the problem because I have 4.08.1 and I can see that I need >=4.12.0 & <5.0.0. I'm not sure if ocaml was installed through the Ubuntu packages as well and that could prevent ocam from being able to upgrade it. I'm not sure how ocaml is supposed to be installed and if it would be a dependancy for opam.

I'm only using opam for liquidsoap so another thought that I had is trying to remove all of the packages and starting a fresh with the install. However if ocaml is from the Ubuntu package then it could still cause me a problem.

[toots]

Ok. I'm pretty sure upgrading to opam 2.1 should fix your issue.

[SkillenUK]

Ahh OK, thanks for your help. I'll look in to it.

[SkillenUK]

I've managed up upgrade opam, which then gave me a sensible error message when trying to upgrade liquidsoap. I've then learnt how to use opam switch to ger ocaml version 4.14.1. Then I could install liquidsoap 2.1.4.

Thanks again for your help. The good thing now is I still have the previous liquidsoap installed for a quick rollback if needed :)

[toots]

Great! Creating a new switch is a great idea when upgrading, gonna add this to the migration docs, thanks!