Support specifying channel per package (e.g. `<channel>::<package>`) about pixi HOT 11 CLOSED

@baszalmstra,

That sounds like a good idea.

So, going forward this is what we will want:

• When a string is provided, it will be treated as a VersionSpec
• When a mapping is provided, it will be treated as a NamelessMatchSpec

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Brief update: there's actually a very easy way to implement this with serde_with using PickFirst:

• https://docs.rs/serde_with/latest/serde_with/struct.PickFirst.html

Pull request coming soon... 😄

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This would be a very useful feature to have, especially when working with DL libraries, where installing the Nvidia versions of drivers and CUDA-related packages is preferred over the conda-forge equivalent.

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@travishathaway is working on this issue.

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Just FYI...

I will try to follow how this was done in Cargo to make it work (see here: https://github.com/rust-lang/cargo/blob/b644a40a1f8406a08bc64305a6a8fd6bb5a34071/src/cargo/util/toml/mod.rs#L218-L262)

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Sounds perfect! Im not sure if this was your intention already but I propose that we split the entire matchspec struct out into this "new" form. That would forgo all complex matchspec parsing. WDYT?

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I like it! 👍

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yay!

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How do you see this fitting with pypi/pip dependencies?

pip = { version = "*", repository = "YOUR_CUSTOM_REGISTRY" }?

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I've opened this pull request in rattler. This should provide everything to get my proposed solution working:

• mamba-org/rattler#299

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Channel specific works since v0.7.0.

package = { version = "1.2.3", channel = "https://repo.prefix.dev/foo-bar-channel" }

Some caveats still, these can be looked at later when the need for those increases:

• Only uses channels from project.channels list.
• Doesn't support the label channels yet.

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