Cannot add multiple prerelease channels?

[phadej]

It looks like

% ~/.ghcup/bin/ghcup config add-prerelease-channel https://raw.githubusercontent.com/haskell/ghcup-metadata/develop/ghcup-cross-0.0.8.yaml

does nothing if I already have (another) prerelease channel. My config looks like

...
url-source:
- GHCupURL
- https://raw.githubusercontent.com/haskell/ghcup-metadata/master/ghcup-prereleases-0.0.7.yaml
verbose: false

before and after the command.

That is very unconvenient, if one cannot add multiple prerelease channels, nor there are command to remove any.

---

Maybe add-prerelease-channel doesn't work at all?

[phadej]

It's add-release-channel. ghcup just silently does nothing on a wrong command. That is a bug.

[hasufell]

Not really a bug, just confusing behavior.

What happens here that ghcup config <key> <value> is a shorthand for ghcup config set <key> <value>. Additionally, ghcup is a bit too lax when the key (add-prerelease-channel here) doesn't exist... decoding does not fail.

I fixed both here: #926

• ghcup config <key> <value> is no longer valid
• ghcup config set <non-existent-key> <value> will now properly error instead of doing nothing