cabal-install 3.10.2.0 returns wrong version

[benz0li]

Describe the bug

Executing cabal --version with cabal-install 3.10.2.0 returns cabal-install version 3.10.1.0.

To Reproduce

On a host (x86_64) with docker installed:

docker run --rm -ti glcr.b-data.ch/ghc/ghc-musl:9.8.1 bash

Inside the container:

cabal update \
  && cabal install --allow-newer --constraint 'Cabal-syntax<3.11' cabal-install-3.10.2.0

/root/.local/bin/cabal --version

Expected behavior

Executing cabal --version with cabal-install 3.10.2.0 returning cabal-install version 3.10.2.0.

System information

• Alpine Linux 3.18.4
• ghc version: 9.8.1
• cabal version: 3.10.1.0

Additional context

execution-log.txt

Cross reference: https://discourse.haskell.org/t/cabal-install-3-10-2-0-released/8009/3

[Kleidukos]

I can reproduce

[mpickering]

What is the analysis for why this has happened?

[ulysses4ever]

Maybe, there should be a 3.10.3.0 (or 3.10.2.1?) that doesn't suffer this?

[Kleidukos]

@benz0li Alright, with cabal-install-3.10.2.1 this should be solved. Would you mind trying on your side to confirm?

cabal update \
  && cabal install --allow-newer --constraint 'Cabal-syntax<3.11' cabal-install-3.10.2.1

[benz0li]

@benz0li [...] Would you mind trying on your side to confirm?

Confirmed: execution-log.txt

[benz0li]

What is the analysis for why this has happened?

I would appreciate if you (@Kleidukos) answered @mpickering's question.

Thank you.

[Kleidukos]

Fantastic, I'll report on the Discourse thread

[Kleidukos]

Regarding the cause, I suspect a stale candidate that had been published. Indeed, the version number read by cabal --version is a constant defined in the code, not read from the cabal file, and as such it's very probable that the PR to bump the version to 3.10.2.0 missed it.

I think this mechanism should be dropped in favour of something more automatic, like the PackageInfo_* module